Merge pull request #1 from WHSnyder/fully_featured

Import (all but cloth) + Export (skins and anims)

.gitignore

@@ -1,4 +1,4 @@
-
+.DS_Store
 *.msh
 
 # Created by https://www.gitignore.io/api/python,visualstudiocode

addons/io_scene_swbf_msh/__init__.py

@@ -53,12 +53,18 @@ if "bpy" in locals():
 # End of stuff taken from glTF
 
 import bpy
-from bpy_extras.io_utils import ExportHelper
-from bpy.props import BoolProperty, EnumProperty
+from bpy_extras.io_utils import ExportHelper, ImportHelper
+from bpy.props import BoolProperty, EnumProperty, CollectionProperty
 from bpy.types import Operator
-from .msh_scene import create_scene
+from .msh_scene_utilities import create_scene
 from .msh_scene_save import save_scene
+from .msh_scene_read import read_scene
 from .msh_material_properties import *
+from .msh_skeleton_properties import *
+from .msh_collision_prim_properties import *
+from .msh_to_blend import *
+from .zaa_to_blend import *
+
 
 class ExportMSH(Operator, ExportHelper):
     """ Export the current scene as a SWBF .msh file. """
@@ -97,35 +103,128 @@ class ExportMSH(Operator, ExportHelper):
         default=True
     )
 
+    export_with_animation: BoolProperty(
+        name="Export With Animation",
+        description="Includes animation data extracted from the action currently set on armature.",
+        default=False
+    )
+
+    export_as_skeleton: BoolProperty(
+        name="Export Objects As Skeleton",
+        description="Check if you intend to export skeleton data for consumption by ZenAsset.",
+        default=False
+    )
+
+
     def execute(self, context):
+
         with open(self.filepath, 'wb') as output_file:
             save_scene(
                 output_file=output_file,
                 scene=create_scene(
                     generate_triangle_strips=self.generate_triangle_strips, 
                     apply_modifiers=self.apply_modifiers,
-                    export_target=self.export_target))
+                    export_target=self.export_target,
+                    skel_only=self.export_as_skeleton,
+                    export_anim=self.export_with_animation
+                ),
+            )
 
         return {'FINISHED'}
 
+
 # Only needed if you want to add into a dynamic menu
 def menu_func_export(self, context):
     self.layout.operator(ExportMSH.bl_idname, text="SWBF msh (.msh)")
 
+
+
+
+
+class ImportMSH(Operator, ImportHelper):
+    """ Import an SWBF .msh file. """
+
+    bl_idname = "swbf_msh.import"
+    bl_label = "Import SWBF .msh File"
+    filename_ext = ".msh"
+
+    files: CollectionProperty(
+            name="File Path",
+            type=bpy.types.OperatorFileListElement,
+            )
+
+    filter_glob: StringProperty(
+        default="*.msh;*.zaa;*.zaabin",
+        options={'HIDDEN'},
+        maxlen=255,  # Max internal buffer length, longer would be clamped.
+    )
+
+    animation_only: BoolProperty(
+        name="Import Animation Only",
+        description="Import animation and append as a new action to currently selected armature.",
+        default=False
+    )
+
+
+    def execute(self, context):
+        dirname = os.path.dirname(self.filepath)
+        for file in self.files:
+            filepath = os.path.join(dirname, file.name)
+            if filepath.endswith(".zaabin") or filepath.endswith(".zaa"):
+                extract_and_apply_munged_anim(filepath)
+            else:
+                with open(filepath, 'rb') as input_file:              
+                    scene = read_scene(input_file, self.animation_only)
+                    
+                    if not self.animation_only:
+                        extract_scene(filepath, scene)
+                    else:
+                        extract_and_apply_anim(filepath, scene)
+
+        return {'FINISHED'}
+
+def menu_func_import(self, context):
+    self.layout.operator(ImportMSH.bl_idname, text="SWBF msh (.msh)")
+
+
+
+
 def register():
+    bpy.utils.register_class(CollisionPrimitiveProperties)
+
     bpy.utils.register_class(MaterialProperties)
     bpy.utils.register_class(MaterialPropertiesPanel)
+
+    bpy.utils.register_class(SkeletonProperties)
+    bpy.utils.register_class(SkeletonPropertiesPanel)
+
     bpy.utils.register_class(ExportMSH)
+    bpy.utils.register_class(ImportMSH)
 
     bpy.types.TOPBAR_MT_file_export.append(menu_func_export)
-    bpy.types.Material.swbf_msh = bpy.props.PointerProperty(type=MaterialProperties)
+    bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
+
+    bpy.types.Object.swbf_msh_coll_prim = bpy.props.PointerProperty(type=CollisionPrimitiveProperties)
+    bpy.types.Material.swbf_msh_mat = bpy.props.PointerProperty(type=MaterialProperties)
+    bpy.types.Armature.swbf_msh_skel = bpy.props.CollectionProperty(type=SkeletonProperties)
+
 
 
 def unregister():
+    bpy.utils.unregister_class(CollisionPrimitiveProperties)
+
     bpy.utils.unregister_class(MaterialProperties)
     bpy.utils.unregister_class(MaterialPropertiesPanel)
+
+    bpy.utils.unregister_class(SkeletonProperties)
+    bpy.utils.unregister_class(SkeletonPropertiesPanel)
+
     bpy.utils.unregister_class(ExportMSH)
+    bpy.utils.unregister_class(ImportMSH)
+
     bpy.types.TOPBAR_MT_file_export.remove(menu_func_export)
+    bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
+
 
 if __name__ == "__main__":
     register()

addons/io_scene_swbf_msh/chunked_file_reader.py

@@ -0,0 +1,150 @@
+"""
+Reader class for both zaabin, zaa, and msh files.
+"""
+
+import io
+import struct
+import os
+
+from mathutils import Vector, Quaternion
+
+
+class Reader:
+    def __init__(self, file, parent=None, indent=0, debug=False):
+        self.file = file
+        self.size: int = 0
+        self.size_pos = None
+        self.parent = parent
+        self.indent = "  " * indent #for print debugging, should be stored as str so msh_scene_read can access it
+        self.debug = debug
+
+
+    def __enter__(self):
+        self.size_pos = self.file.tell()
+
+        if self.parent is not None:
+            self.header = self.read_bytes(4).decode("utf-8")
+        else:
+            self.header = "File"
+
+        if self.parent is not None:
+            self.size = self.read_u32()
+        else:
+            self.size = os.path.getsize(self.file.name) - 8
+        
+        # No padding to multiples of 4.  Files exported from XSI via zetools do not align by 4!
+        self.end_pos = self.size_pos + self.size + 8
+
+        if self.debug:
+            print("{}Begin {} of Size {} at pos {}:".format(self.indent, self.header, self.size, self.size_pos))
+
+        return self
+
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        if self.size > self.MAX_SIZE:
+            raise OverflowError(f"File overflowed max size. size = {self.size} MAX_SIZE = {self.MAX_SIZE}")
+
+        if self.debug:
+            print("{}End {} at pos: {}".format(self.indent, self.header, self.end_pos))
+
+        self.file.seek(self.end_pos)
+
+
+
+    def read_bytes(self,num_bytes):
+        return self.file.read(num_bytes)
+
+
+    def read_string(self):
+        last_byte = self.read_bytes(1)
+        result = b''
+        while last_byte[0] != 0x0:
+            result += last_byte
+            last_byte = self.read_bytes(1)
+
+        return result.decode("utf-8")
+
+    def read_i8(self, num=1):
+        buf = self.read_bytes(num)
+        result = struct.unpack(f"<{num}b", buf)
+        return result[0] if num == 1 else result
+
+    def read_u8(self, num=1):
+        buf = self.read_bytes(num)
+        result = struct.unpack(f"<{num}B", buf)
+        return result[0] if num == 1 else result
+
+    def read_i16(self, num=1):
+        buf = self.read_bytes(num * 2)
+        result = struct.unpack(f"<{num}h", buf)
+        return result[0] if num == 1 else result
+
+    def read_u16(self, num=1):
+        buf = self.read_bytes(num * 2)
+        result = struct.unpack(f"<{num}H", buf)
+        return result[0] if num == 1 else result
+
+    def read_i32(self, num=1):
+        buf = self.read_bytes(num * 4)
+        result = struct.unpack(f"<{num}i", buf)
+        return result[0] if num == 1 else result
+
+    def read_u32(self, num=1):
+        buf = self.read_bytes(num * 4) 
+        result = struct.unpack(f"<{num}I", buf)
+        return result[0] if num == 1 else result
+
+    def read_f32(self, num=1):
+        buf = self.read_bytes(num * 4)
+        result = struct.unpack(f"<{num}f", buf)
+        return result[0] if num == 1 else result
+
+
+    def read_quat(self):
+        rot = self.read_f32(4)
+        return Quaternion((rot[3], rot[0], rot[1], rot[2]))
+
+    def read_vec(self):
+        return Vector(self.read_f32(3))
+
+
+    def read_child(self):
+        child = Reader(self.file, parent=self, indent=int(len(self.indent) / 2) + 1, debug=self.debug)
+        return child
+
+
+    def skip_bytes(self,num):
+        self.file.seek(num,1)
+
+
+    def peak_next_header(self):
+
+        buf = self.read_bytes(4);
+        self.file.seek(-4,1)
+
+        try:
+            result = buf.decode("utf-8")
+            return result
+        except:
+            return ""
+
+    def get_current_pos(self):
+        return self.file.tell()
+
+    def reset_pos(self):
+        self.file.seek(self.size_pos - self.file.tell() + 8, 1)
+
+    def how_much_left(self, pos):
+        return self.end_pos - pos
+
+    def skip_until(self, header):
+        while (self.could_have_child() and header not in self.peak_next_header()):
+            self.skip_bytes(1)
+
+
+    def could_have_child(self):
+    	return self.end_pos - self.file.tell() >= 8
+
+
+    MAX_SIZE: int = 2147483647 - 8

addons/io_scene_swbf_msh/crc.py

@@ -0,0 +1,89 @@
+'''
+Based on code by Benedikt Schatz from https://github.com/Schlechtwetterfront/xsizetools/blob/master/Application/Modules/msh2_crc.py    
+''' 
+
+
+# CRC lookup table.
+table32_lookup = (
+    0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
+    0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
+    0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
+    0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
+    0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9,
+    0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
+    0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011,
+    0x791D4014, 0x7DDC5DA3, 0x709F7B7A, 0x745E66CD,
+    0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
+    0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5,
+    0xBE2B5B58, 0xBAEA46EF, 0xB7A96036, 0xB3687D81,
+    0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
+    0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49,
+    0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
+    0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1,
+    0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D,
+    0x34867077, 0x30476DC0, 0x3D044B19, 0x39C556AE,
+    0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
+    0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16,
+    0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA,
+    0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE,
+    0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02,
+    0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1, 0x53DC6066,
+    0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
+    0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E,
+    0xBFA1B04B, 0xBB60ADFC, 0xB6238B25, 0xB2E29692,
+    0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6,
+    0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A,
+    0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E,
+    0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
+    0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686,
+    0xD5B88683, 0xD1799B34, 0xDC3ABDED, 0xD8FBA05A,
+    0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637,
+    0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
+    0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F,
+    0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
+    0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47,
+    0x36194D42, 0x32D850F5, 0x3F9B762C, 0x3B5A6B9B,
+    0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
+    0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623,
+    0xF12F560E, 0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7,
+    0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
+    0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F,
+    0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
+    0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7,
+    0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B,
+    0x9B3660C6, 0x9FF77D71, 0x92B45BA8, 0x9675461F,
+    0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
+    0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640,
+    0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C,
+    0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8,
+    0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24,
+    0x119B4BE9, 0x155A565E, 0x18197087, 0x1CD86D30,
+    0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
+    0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088,
+    0x2497D08D, 0x2056CD3A, 0x2D15EBE3, 0x29D4F654,
+    0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0,
+    0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C,
+    0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18,
+    0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
+    0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0,
+    0x9ABC8BD5, 0x9E7D9662, 0x933EB0BB, 0x97FFAD0C,
+    0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668,
+    0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
+)
+
+
+def to_lower(charcode):
+    if charcode <= 64 or charcode > 90:
+        return charcode
+    else:
+        return charcode + 32
+
+# Not sure what Schlechtwetterfront means by "Simulate unsigned behavior.",
+# kept it anyways just without the extra functions
+def to_crc(string):
+    crc_ = ~0 & 0xFFFFFFFF
+    if string:
+        for char in string:
+            ind = (crc_ >> 24) ^ to_lower(ord(char))
+            crc_ = ((crc_ << 8) & 0xFFFFFFFF) ^ table32_lookup[ind]
+    return ~crc_ & 0xFFFFFFFF

addons/io_scene_swbf_msh/msh_anim_gather.py

@@ -0,0 +1,100 @@
+""" Converts currently active Action to an msh Animation """
+
+import bpy
+import math
+from enum import Enum
+from typing import List, Set, Dict, Tuple
+from itertools import zip_longest
+from .msh_model import *
+from .msh_model_utilities import *
+from .msh_utilities import *
+from .msh_model_gather import *
+
+from .msh_skeleton_utilities import *
+
+from .crc import to_crc
+
+
+'''
+Convert the active Action into an Animation.  When exported SWBF anims, there is the issue
+that all bones in the anim must be in the skeleton/basepose anim.  We guarantee this by
+only keying bones if they are in the armature's preserved skeleton (swbf_msh_skel) and 
+adding dummy frames if the bones are not in the armature.
+
+If a preserved skeleton is not present, we include only the keyed bones and add dummy frames for
+the root (root_name)
+'''
+
+def extract_anim(armature: bpy.types.Armature, root_name: str) -> Animation:
+
+    if not armature.animation_data or not armature.animation_data.action:
+        raise RuntimeError("Cannot export animation data without an active Action on armature!")
+
+    action = armature.animation_data.action
+
+
+    # Set of bones to include in SKL2/animation stuff
+    keyable_bones = get_real_BONES(armature)
+
+    # If it doesn't have a preserved skeleton, then we add the scene root. 
+    # If it does have a preserved skeleton, any objects not animatable by blender (i.e. objects above the skeleton, scene root)
+    # will be included in the preserved skeleton 
+    if not has_preserved_skeleton(armature):
+        keyable_bones.add(root_name)
+
+    # Subset of above bones to key with dummy frames (all bones not in armature)
+    dummy_bones = set([keyable_bone for keyable_bone in keyable_bones if keyable_bone not in armature.data.bones])
+
+
+    anim = Animation();
+
+    root_crc = to_crc(root_name)
+
+    if not action:
+        framerange = Vector((0.0,1.0))
+    else:
+        framerange = action.frame_range
+    
+    num_frames = math.floor(framerange.y - framerange.x) + 1
+    increment  = (framerange.y - framerange.x) / (num_frames - 1)
+
+    anim.end_index = num_frames - 1
+    
+
+    for keyable_bone in keyable_bones:
+        anim.bone_frames[to_crc(keyable_bone)] = ([], [])
+
+
+    for frame in range(num_frames):
+        
+        frame_time = framerange.x + frame * increment
+        bpy.context.scene.frame_set(frame_time)
+
+        for keyable_bone in keyable_bones:
+
+            bone_crc = to_crc(keyable_bone)
+
+            if keyable_bone in dummy_bones:
+
+                rframe = RotationFrame(frame, convert_rotation_space(Quaternion()))
+                tframe = TranslationFrame(frame, Vector((0.0,0.0,0.0)))
+
+            else:
+
+                bone = armature.pose.bones[keyable_bone]
+
+                transform = bone.matrix
+
+                if bone.parent:
+                    transform = bone.parent.matrix.inverted() @ transform
+     
+                loc, rot, _ = transform.decompose()
+
+                rframe = RotationFrame(frame, convert_rotation_space(rot))
+                tframe = TranslationFrame(frame, convert_vector_space(loc))
+
+            anim.bone_frames[bone_crc][0].append(tframe)
+            anim.bone_frames[bone_crc][1].append(rframe)
+
+
+    return anim

addons/io_scene_swbf_msh/msh_collision_prim_properties.py

@@ -0,0 +1,16 @@
+""" IntProperty needed to keep track of Collision Primitives types that are imported without indicitive names.  
+    Not sure I needed a PropertyGroup/what a leaner method would be.  The prims shouldn't be renamed on import because
+    they are often referenced in ODFs.
+
+    Don't see a reason these should be exposed via a panel or need to be changed..."""
+
+import bpy
+from bpy.props import IntProperty
+from bpy.types import PropertyGroup
+
+
+class CollisionPrimitiveProperties(PropertyGroup):
+        prim_type: IntProperty(name="Primitive Type", default=-1)
+
+
+        

addons/io_scene_swbf_msh/msh_material.py

@@ -19,6 +19,31 @@ class Rendertype(Enum):
     NORMALMAPPED = 27
     NORMALMAPPED_TILED_ENVMAP = 29
 
+    # Placeholders to avoid crashes/import-export inconsistencies
+    OTHER_1 = 1
+    OTHER_2 = 2
+    OTHER_4 = 4
+    OTHER_5 = 5
+    OTHER_8 = 8
+    OTHER_9 = 9
+    OTHER_10 = 10
+    OTHER_11 = 11
+    OTHER_12 = 12
+    OTHER_13 = 13
+    OTHER_14 = 14
+    OTHER_15 = 15
+    OTHER_16 = 16
+    OTHER_17 = 17
+    OTHER_18 = 18
+    OTHER_19 = 19
+    OTHER_20 = 20
+    OTHER_21 = 21
+    OTHER_23 = 23
+    OTHER_28 = 28
+    OTHER_30 = 30
+    OTHER_31 = 31
+
+
 class MaterialFlags(Flag):
     NONE = 0
     UNLIT = 1
@@ -32,8 +57,9 @@ class MaterialFlags(Flag):
 
 @dataclass
 class Material:
-    """ Data class representing a .msh material.
-        Intended to be stored in a dictionary so name is missing. """
+    """ Data class representing a .msh material."""
+
+    name: str = ""
 
     specular_color: Color = Color((1.0, 1.0, 1.0))
     rendertype: Rendertype = Rendertype.NORMAL

addons/io_scene_swbf_msh/msh_material_gather.py

@@ -5,6 +5,8 @@ import bpy
 from typing import Dict
 from .msh_material import *
 
+from .msh_material_utilities import _RENDERTYPES_MAPPING
+
 def gather_materials() -> Dict[str, Material]:
     """ Gathers the Blender materials and returns them as
         a dictionary of strings and Material objects. """
@@ -22,36 +24,36 @@ def read_material(blender_material: bpy.types.Material) -> Material:
 
     result = Material()
 
-    if blender_material.swbf_msh is None:
+    if blender_material.swbf_msh_mat is None:
         return result
 
-    props = blender_material.swbf_msh
+    props = blender_material.swbf_msh_mat
 
     result.specular_color = props.specular_color.copy()
     result.rendertype = _read_material_props_rendertype(props)
     result.flags = _read_material_props_flags(props)
     result.data = _read_material_props_data(props)
-    result.texture0 = props.diffuse_map
-    result.texture1 = _read_normal_map_or_distortion_map_texture(props)
-    result.texture2 = _read_detail_texture(props)
-    result.texture3 = _read_envmap_texture(props)
+
+    if "UNSUPPORTED" not in props.rendertype:
+        result.texture0 = props.diffuse_map
+        result.texture1 = _read_normal_map_or_distortion_map_texture(props)
+        result.texture2 = _read_detail_texture(props)
+        result.texture3 = _read_envmap_texture(props)
+    
+    else:
+        result.texture0 = props.texture_0
+        result.texture1 = props.texture_1
+        result.texture2 = props.texture_2
+        result.texture3 = props.texture_3
 
     return result
 
-_RENDERTYPES_MAPPING = {
-    "NORMAL_BF2": Rendertype.NORMAL,
-    "SCROLLING_BF2": Rendertype.SCROLLING,
-    "ENVMAPPED_BF2": Rendertype.ENVMAPPED,
-    "ANIMATED_BF2": Rendertype.ANIMATED,
-    "REFRACTION_BF2": Rendertype.REFRACTION,
-    "BLINK_BF2": Rendertype.BLINK,
-    "NORMALMAPPED_TILED_BF2": Rendertype.NORMALMAPPED_TILED,
-    "NORMALMAPPED_ENVMAPPED_BF2": Rendertype.NORMALMAPPED_ENVMAPPED,
-    "NORMALMAPPED_BF2": Rendertype.NORMALMAPPED,
-    "NORMALMAPPED_TILED_ENVMAPPED_BF2": Rendertype.NORMALMAPPED_TILED_ENVMAP}
 
 def _read_material_props_rendertype(props) -> Rendertype:
-    return _RENDERTYPES_MAPPING[props.rendertype]
+    if "UNSUPPORTED" in props.rendertype:
+        return Rendertype(props.rendertype_value)
+    else:
+        return _RENDERTYPES_MAPPING[props.rendertype]
 
 def _read_material_props_flags(props) -> MaterialFlags:
     if "REFRACTION" in props.rendertype:
@@ -79,6 +81,8 @@ def _read_material_props_flags(props) -> MaterialFlags:
     return flags
 
 def _read_material_props_data(props) -> Tuple[int, int]:
+    if "UNSUPPORTED" in props.rendertype:
+        return (props.data_value_0, props.data_value_1)
     if "SCROLLING" in props.rendertype:
         return (props.scroll_speed_u, props.scroll_speed_v)
     if "BLINK" in props.rendertype:

addons/io_scene_swbf_msh/msh_material_properties.py

@@ -3,7 +3,11 @@
 import bpy
 from bpy.props import StringProperty, BoolProperty, EnumProperty, FloatVectorProperty, IntProperty
 from bpy.types import PropertyGroup
+
+from .msh_material import *
 from .msh_material_ui_strings import *
+from .msh_material_utilities import _REVERSE_RENDERTYPES_MAPPING
+
 
 UI_MATERIAL_RENDERTYPES = (
     ('NORMAL_BF2', "00 Normal (SWBF2)", UI_RENDERTYPE_NORMAL_BF2_DESC),
@@ -15,7 +19,9 @@ UI_MATERIAL_RENDERTYPES = (
     ('NORMALMAPPED_TILED_BF2', "24 Normalmapped Tiled (SWBF2)", UI_RENDERTYPE_NORMALMAPPED_TILED_BF2_DESC),
     ('NORMALMAPPED_ENVMAPPED_BF2', "26 Normalmapped Envmapped (SWBF2)", UI_RENDERTYPE_NORMALMAPPED_ENVMAPPED_BF2_DESC),
     ('NORMALMAPPED_BF2', "27 Normalmapped (SWBF2)", UI_RENDERTYPE_NORMALMAPPED_BF2_DESC),
-    ('NORMALMAPPED_TILED_ENVMAPPED_BF2', "29 Normalmapped Tiled Envmapped (SWBF2)", UI_RENDERTYPE_NORMALMAPPED_TILED_ENVMAPPED_BF2_DESC))
+    ('NORMALMAPPED_TILED_ENVMAPPED_BF2', "29 Normalmapped Tiled Envmapped (SWBF2)", UI_RENDERTYPE_NORMALMAPPED_TILED_ENVMAPPED_BF2_DESC),
+    ('UNSUPPORTED', "Other (SWBF1/2)", UI_RENDERTYPE_UNSUPPORTED_BF2_DESC))
+
 
 def _make_anim_length_entry(length):
     from math import sqrt
@@ -182,6 +188,18 @@ class MaterialProperties(PropertyGroup):
                                                "distort the scene behind them. Should be a normal map "
                                                "with '-forceformat v8u8' in it's '.tga.option' file.")
 
+    # Below props are for yet unsupported render types
+    data_value_0: IntProperty(name="", description="First data value")
+    data_value_1: IntProperty(name="", description="Second data value")
+
+    rendertype_value: IntProperty(name="Rendertype Value", description="Raw number value of rendertype.", min=0, max=31)
+
+    texture_0: StringProperty(name="1", description="First texture slot")
+    texture_1: StringProperty(name="2", description="Second texture slot")
+    texture_2: StringProperty(name="3", description="Third texture slot")
+    texture_3: StringProperty(name="4", description="Fourth texture slot")
+
+
 class MaterialPropertiesPanel(bpy.types.Panel):
     """ Creates a Panel in the Object properties window """
     bl_label = "SWBF .msh Properties"
@@ -190,15 +208,21 @@ class MaterialPropertiesPanel(bpy.types.Panel):
     bl_region_type = 'WINDOW'
     bl_context = "material"
 
+
+
     def draw(self, context):
         if context.material is None:
             return
 
         layout = self.layout
 
-        material_props = context.material.swbf_msh
+        material_props = context.material.swbf_msh_mat
 
         layout.prop(material_props, "rendertype")
+
+        if "UNSUPPORTED" in material_props.rendertype:
+            layout.prop(material_props, "rendertype_value")
+
         layout.prop(material_props, "specular_color")
 
         if "REFRACTION" not in material_props.rendertype:
@@ -233,21 +257,31 @@ class MaterialPropertiesPanel(bpy.types.Panel):
             elif "NORMALMAPPED_TILED" in material_props.rendertype:
                 row.prop(material_props, "normal_map_tiling_u")
                 row.prop(material_props, "normal_map_tiling_v")
+            elif "UNSUPPORTED" in material_props.rendertype:
+                row.prop(material_props, "data_value_0") 
+                row.prop(material_props, "data_value_1")
             else:
                 row.prop(material_props, "detail_map_tiling_u")
                 row.prop(material_props, "detail_map_tiling_v")
 
         layout.label(text="Texture Maps: ")
-        layout.prop(material_props, "diffuse_map")
+        if "UNSUPPORTED" not in material_props.rendertype:
+            layout.prop(material_props, "diffuse_map")
 
-        if "REFRACTION" not in material_props.rendertype:
-            layout.prop(material_props, "detail_map")
+            if "REFRACTION" not in material_props.rendertype:
+                layout.prop(material_props, "detail_map")
 
-        if "NORMALMAPPED" in material_props.rendertype:
-            layout.prop(material_props, "normal_map")
+            if "NORMALMAPPED" in material_props.rendertype:
+                layout.prop(material_props, "normal_map")
 
-        if "ENVMAPPED" in material_props.rendertype:
-            layout.prop(material_props, "environment_map")
+            if "ENVMAPPED" in material_props.rendertype:
+                layout.prop(material_props, "environment_map")
+
+            if "REFRACTION" in material_props.rendertype:
+                layout.prop(material_props, "distortion_map")
+        else:
+            layout.prop(material_props, "texture_0")
+            layout.prop(material_props, "texture_1")
+            layout.prop(material_props, "texture_2")
+            layout.prop(material_props, "texture_3")
 
-        if "REFRACTION" in material_props.rendertype:
-            layout.prop(material_props, "distortion_map")

addons/io_scene_swbf_msh/msh_material_to_blend.py

@@ -0,0 +1,116 @@
+""" For finding textures and assigning MaterialProperties from entries in a Material """
+
+import bpy
+from typing import Dict
+from .msh_material import *
+from .msh_material_gather import *
+from .msh_material_properties import *
+
+from .msh_material_utilities import _REVERSE_RENDERTYPES_MAPPING
+
+from math import sqrt
+
+import os
+
+
+
+def find_texture_path(folder_path : str, name : str) -> str:
+
+    if not folder_path or not name:
+        return ""
+
+    possible_paths = [
+        os.path.join(folder_path, name),
+        os.path.join(folder_path, "PC", name),
+        os.path.join(folder_path, "pc", name),
+        os.path.join(folder_path, ".." , name),
+    ]  
+
+    for possible_path in possible_paths:
+        if os.path.exists(possible_path):
+            return possible_path
+
+    return ""
+
+
+
+def fill_material_props(material : Material, material_properties):
+    """ Fills MaterialProperties from Material instance """
+
+    if material_properties is None or material is None:
+        return
+
+    material_properties.rendertype_value = material.rendertype.value
+
+    material_properties.specular_color = (material.specular_color[0], material.specular_color[1], material.specular_color[2])
+    
+    _fill_material_props_rendertype(material, material_properties)
+    _fill_material_props_flags(material, material_properties)
+    _fill_material_props_data(material, material_properties)
+    _fill_material_props_texture_maps(material, material_properties)
+
+
+
+def _fill_material_props_rendertype(material, material_properties):
+    if material.rendertype in _REVERSE_RENDERTYPES_MAPPING:
+        material_properties.rendertype = _REVERSE_RENDERTYPES_MAPPING[material.rendertype]
+    else:
+        material_properties.rendertype = "UNSUPPORTED"
+
+
+def _fill_material_props_flags(material, material_properties):
+    if material.rendertype == Rendertype.REFRACTION:
+        material_properties.blended_transparency = True
+        return
+
+    flags = material.flags
+
+    material_properties.blended_transparency = bool(flags & MaterialFlags.BLENDED_TRANSPARENCY)
+    material_properties.additive_transparency = bool(flags & MaterialFlags.ADDITIVE_TRANSPARENCY)
+    material_properties.hardedged_transparency = bool(flags & MaterialFlags.HARDEDGED_TRANSPARENCY)
+    material_properties.unlit = bool(flags & MaterialFlags.UNLIT)
+    material_properties.glow = bool(flags & MaterialFlags.GLOW)
+    material_properties.perpixel = bool(flags & MaterialFlags.PERPIXEL)
+    material_properties.specular = bool(flags & MaterialFlags.SPECULAR)
+    material_properties.doublesided = bool(flags & MaterialFlags.DOUBLESIDED)
+
+
+def _fill_material_props_data(material, material_properties):
+
+    material_properties.data_value_0 = material.data[0]
+    material_properties.data_value_1 = material.data[1]
+
+    material_properties.scroll_speed_u = material.data[0]
+    material_properties.scroll_speed_v = material.data[1]
+
+    material_properties.blink_min_brightness = material.data[0]
+    material_properties.blink_speed = material.data[1]
+
+    material_properties.normal_map_tiling_u = material.data[0]
+    material_properties.normal_map_tiling_v = material.data[1]
+
+    anim_length_index = int(sqrt(material.data[0]))
+    if anim_length_index < 0:
+        anim_length_index = 0
+    elif anim_length_index > len(UI_MATERIAL_ANIMATION_LENGTHS):
+        anim_length_index = len(UI_MATERIAL_ANIMATION_LENGTHS) - 1
+
+    material_properties.animation_length = UI_MATERIAL_ANIMATION_LENGTHS[anim_length_index][0]
+    material_properties.animation_speed = material.data[1]
+
+    material_properties.detail_map_tiling_u = material.data[0]
+    material_properties.detail_map_tiling_v = material.data[1]
+
+
+def _fill_material_props_texture_maps(material, material_properties):
+
+        material_properties.texture_0 = material.texture0
+        material_properties.texture_1 = material.texture1
+        material_properties.texture_2 = material.texture2
+        material_properties.texture_3 = material.texture3
+
+        material_properties.diffuse_map = material.texture0
+        material_properties.distortion_map = material.texture1
+        material_properties.normal_map = material.texture1
+        material_properties.detail_map = material.texture2
+        material_properties.environment_map = material.texture3

addons/io_scene_swbf_msh/msh_material_ui_strings.py

@@ -1,5 +1,10 @@
 """ UI strings that are too long to have in msh_materials_properties.py """
 
+
+UI_RENDERTYPE_UNSUPPORTED_BF2_DESC = \
+    "Unsupported rendertype.  The raw values of the material "\
+    "are fully accessible, but their purpose is unknown.  "
+
 UI_RENDERTYPE_DETAIL_MAP_DESC = \
     "Can optionally have a Detail Map."
 

addons/io_scene_swbf_msh/msh_material_utilities.py

@@ -4,6 +4,35 @@ from typing import Dict, List
 from .msh_material import *
 from .msh_model import *
 
+
+_RENDERTYPES_MAPPING = {
+    "NORMAL_BF2": Rendertype.NORMAL,
+    "SCROLLING_BF2": Rendertype.SCROLLING,
+    "ENVMAPPED_BF2": Rendertype.ENVMAPPED,
+    "ANIMATED_BF2": Rendertype.ANIMATED,
+    "REFRACTION_BF2": Rendertype.REFRACTION,
+    "BLINK_BF2": Rendertype.BLINK,
+    "NORMALMAPPED_TILED_BF2": Rendertype.NORMALMAPPED_TILED,
+    "NORMALMAPPED_ENVMAPPED_BF2": Rendertype.NORMALMAPPED_ENVMAPPED,
+    "NORMALMAPPED_BF2": Rendertype.NORMALMAPPED,
+    "NORMALMAPPED_TILED_ENVMAPPED_BF2": Rendertype.NORMALMAPPED_TILED_ENVMAP}
+
+
+_REVERSE_RENDERTYPES_MAPPING = {
+    Rendertype.NORMAL : "NORMAL_BF2",
+    Rendertype.SCROLLING : "SCROLLING_BF2",
+    Rendertype.ENVMAPPED : "ENVMAPPED_BF2",
+    Rendertype.ANIMATED : "ANIMATED_BF2",
+    Rendertype.REFRACTION : "REFRACTION_BF2",
+    Rendertype.BLINK : "BLINK_BF2",
+    Rendertype.NORMALMAPPED_TILED : "NORMALMAPPED_TILED_BF2",
+    Rendertype.NORMALMAPPED_ENVMAPPED : "NORMALMAPPED_ENVMAPPED_BF2",
+    Rendertype.NORMALMAPPED : "NORMALMAPPED_BF2",
+    Rendertype.NORMALMAPPED_TILED_ENVMAP : "NORMALMAPPED_TILED_ENVMAPPED_BF2"}
+
+
+
+
 def remove_unused_materials(materials: Dict[str, Material], 
                             models: List[Model]) -> Dict[str, Material]:
     """ Given a dictionary of materials and a list of models

addons/io_scene_swbf_msh/msh_model.py

@@ -2,7 +2,7 @@
     saved to a .msh file. """
 
 from dataclasses import dataclass, field
-from typing import List
+from typing import List, Tuple, Dict
 from enum import Enum
 from mathutils import Vector, Quaternion
 
@@ -13,11 +13,16 @@ class ModelType(Enum):
     BONE = 3
     STATIC = 4
 
+    # Maybe there are only for BF1 models (http://www.secretsociety.com/forum/downloads/BF1/BF1%20Mesh%20File%20Format.txt)?
+    # According to that link #3 is envelope, not bone, maybe that's for TCW or smthg
+    # CHILDSKIN = 5 # I didnt bother with these, never encountered one and they might need adjustments to vertex data
+    SHADOWVOLUME = 6 # Pretty common
+
 class CollisionPrimitiveShape(Enum):
     SPHERE = 0
-    # ELLIPSOID = 1
+    ELLIPSOID = 1
     CYLINDER = 2
-    # MESH = 3
+    MESH = 3
     BOX = 4
 
 @dataclass
@@ -27,22 +32,31 @@ class ModelTransform:
     translation: Vector = field(default_factory=Vector)
     rotation: Quaternion = field(default_factory=Quaternion)
 
+@dataclass
+class VertexWeight:
+    """ Class representing a vertex weight in a .msh file. """
+
+    weight: float = 1.0
+    bone: int = 0
+
 @dataclass
 class GeometrySegment:
     """ Class representing a 'SEGM' section in a .msh file. """
 
-    material_name: str = ""
+    material_name: str = field(default_factory=str)
 
     positions: List[Vector] = field(default_factory=list)
     normals: List[Vector] = field(default_factory=list)
     colors: List[List[float]] = None
     texcoords: List[Vector] = field(default_factory=list)
-    # TODO: Skin support.
+
+    weights: List[List[VertexWeight]] = None
 
     polygons: List[List[int]] = field(default_factory=list)
     triangles: List[List[int]] = field(default_factory=list)
     triangle_strips: List[List[int]] = None
 
+
 @dataclass
 class CollisionPrimitive:
     """ Class representing a 'SWCI' section in a .msh file. """
@@ -63,5 +77,33 @@ class Model:
 
     transform: ModelTransform = field(default_factory=ModelTransform)
 
+    bone_map: List[str] = None
+
     geometry: List[GeometrySegment] = None
     collisionprimitive: CollisionPrimitive = None
+
+
+@dataclass
+class RotationFrame:
+
+    index : int = 0
+    rotation : Quaternion = field(default_factory=Quaternion)
+
+
+@dataclass
+class TranslationFrame:
+
+    index : int = 0
+    translation : Vector = field(default_factory=Vector)  
+
+
+@dataclass
+class Animation:
+    """ Class representing 'CYCL' + 'KFR3' sections in a .msh file """
+
+    name: str = "fullanimation"
+    bone_frames: Dict[int, Tuple[List[TranslationFrame], List[RotationFrame]]] = field(default_factory=dict)
+
+    framerate: float = 29.97
+    start_index : int = 0
+    end_index   : int = 0

addons/io_scene_swbf_msh/msh_model_gather.py

@@ -9,12 +9,13 @@ from itertools import zip_longest
 from .msh_model import *
 from .msh_model_utilities import *
 from .msh_utilities import *
+from .msh_skeleton_utilities import *
 
 SKIPPED_OBJECT_TYPES = {"LATTICE", "CAMERA", "LIGHT", "SPEAKER", "LIGHT_PROBE"}
 MESH_OBJECT_TYPES = {"MESH", "CURVE", "SURFACE", "META", "FONT", "GPENCIL"}
 MAX_MSH_VERTEX_COUNT = 32767
 
-def gather_models(apply_modifiers: bool, export_target: str) -> List[Model]:
+def gather_models(apply_modifiers: bool, export_target: str, skeleton_only: bool) -> Tuple[List[Model], bpy.types.Object]:
     """ Gathers the Blender objects from the current scene and returns them as a list of
         Model objects. """
 
@@ -23,6 +24,8 @@ def gather_models(apply_modifiers: bool, export_target: str) -> List[Model]:
 
     models_list: List[Model] = []
 
+    armature_found = None
+
     for uneval_obj in select_objects(export_target):
         if uneval_obj.type in SKIPPED_OBJECT_TYPES and uneval_obj.name not in parents:
             continue
@@ -30,43 +33,72 @@ def gather_models(apply_modifiers: bool, export_target: str) -> List[Model]:
         if apply_modifiers:
             obj = uneval_obj.evaluated_get(depsgraph)
         else:
-            obj = uneval_obj
+            obj = uneval_obj 
 
         check_for_bad_lod_suffix(obj)
 
-        local_translation, local_rotation, _ = obj.matrix_local.decompose()
+        if obj.type == "ARMATURE":
+            models_list += expand_armature(obj)
+            armature_found = obj
+            continue
 
         model = Model()
         model.name = obj.name
-        model.model_type = get_model_type(obj)
+        model.model_type = get_model_type(obj, skeleton_only)
         model.hidden = get_is_model_hidden(obj)
-        model.transform.rotation = convert_rotation_space(local_rotation)
+
+        transform = obj.matrix_local
+
+        if obj.parent_bone:
+            model.parent = obj.parent_bone
+
+            # matrix_local, when called on an armature child also parented to a bone, appears to be broken.
+            # At the very least, the results contradict the docs...  
+            armature_relative_transform = obj.parent.matrix_world.inverted() @ obj.matrix_world
+            transform = obj.parent.data.bones[obj.parent_bone].matrix_local.inverted() @ armature_relative_transform 
+
+        else:
+            if obj.parent is not None:
+                if obj.parent.type == "ARMATURE":
+                    model.parent = obj.parent.parent.name if obj.parent.parent else ""
+                    transform = obj.parent.matrix_local @ transform
+                else:
+                    model.parent = obj.parent.name
+
+        local_translation, local_rotation, _ = transform.decompose()
+        model.transform.rotation = convert_rotation_space(local_rotation)  
         model.transform.translation = convert_vector_space(local_translation)
 
-        if obj.parent is not None:
-            model.parent = obj.parent.name
-
         if obj.type in MESH_OBJECT_TYPES:
+
             mesh = obj.to_mesh()
-            model.geometry = create_mesh_geometry(mesh)
+            model.geometry = create_mesh_geometry(mesh, obj.vertex_groups)
+
             obj.to_mesh_clear()
 
             _, _, world_scale = obj.matrix_world.decompose()
             world_scale = convert_scale_space(world_scale)
             scale_segments(world_scale, model.geometry)
-    
+                
             for segment in model.geometry:
                 if len(segment.positions) > MAX_MSH_VERTEX_COUNT:
                     raise RuntimeError(f"Object '{obj.name}' has resulted in a .msh geometry segment that has "
                                        f"more than {MAX_MSH_VERTEX_COUNT} vertices! Split the object's mesh up "
                                        f"and try again!")
+            if obj.vertex_groups:
+                model.bone_map = [group.name for group in obj.vertex_groups]
+
 
         if get_is_collision_primitive(obj):
             model.collisionprimitive = get_collision_primitive(obj)
 
+
         models_list.append(model)
 
-    return models_list
+
+    return (models_list, armature_found)
+
+
 
 def create_parents_set() -> Set[str]:
     """ Creates a set with the names of the Blender objects from the current scene
@@ -80,7 +112,7 @@ def create_parents_set() -> Set[str]:
 
     return parents
 
-def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
+def create_mesh_geometry(mesh: bpy.types.Mesh, has_weights: bool) -> List[GeometrySegment]:
     """ Creates a list of GeometrySegment objects from a Blender mesh.
         Does NOT create triangle strips in the GeometrySegment however. """
 
@@ -93,7 +125,7 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
     material_count = max(len(mesh.materials), 1)
 
     segments: List[GeometrySegment] = [GeometrySegment() for i in range(material_count)]
-    vertex_cache: List[Dict[Tuple[float], int]] = [dict() for i in range(material_count)]
+    vertex_cache = [dict() for i in range(material_count)]
     vertex_remap: List[Dict[Tuple[int, int], int]] = [dict() for i in range(material_count)]
     polygons: List[Set[int]] = [set() for i in range(material_count)]
 
@@ -101,6 +133,10 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
         for segment in segments:
             segment.colors = []
 
+    if has_weights:
+        for segment in segments:
+            segment.weights = []
+
     for segment, material in zip(segments, mesh.materials):
         segment.material_name = material.name
 
@@ -116,11 +152,11 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
 
         if use_smooth_normal or mesh.use_auto_smooth:
             if mesh.has_custom_normals:
-                vertex_normal = mesh.loops[loop_index].normal
+                vertex_normal = Vector( mesh.loops[loop_index].normal )
             else:
-                vertex_normal = mesh.vertices[vertex_index].normal
+                vertex_normal = Vector( mesh.vertices[vertex_index].normal )
         else:
-            vertex_normal = face_normal
+            vertex_normal = Vector(face_normal)
 
         def get_cache_vertex():
             yield mesh.vertices[vertex_index].co.x
@@ -139,6 +175,11 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
                 for v in mesh.vertex_colors.active.data[loop_index].color:
                     yield v
 
+            if segment.weights is not None:
+                for v in mesh.vertices[vertex_index].groups:
+                    yield v.group
+                    yield v.weight
+
         vertex_cache_entry = tuple(get_cache_vertex())
         cached_vertex_index = cache.get(vertex_cache_entry, vertex_cache_miss_index)
 
@@ -162,6 +203,11 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
         if segment.colors is not None:
             segment.colors.append(list(mesh.vertex_colors.active.data[loop_index].color))
 
+        if segment.weights is not None:
+            groups = mesh.vertices[vertex_index].groups
+           
+            segment.weights.append([VertexWeight(v.weight, v.group) for v in groups])
+
         return new_index
 
     for tri in mesh.loop_triangles:
@@ -179,12 +225,14 @@ def create_mesh_geometry(mesh: bpy.types.Mesh) -> List[GeometrySegment]:
 
     return segments
 
-def get_model_type(obj: bpy.types.Object) -> ModelType:
+def get_model_type(obj: bpy.types.Object, skel_only: bool) -> ModelType:
     """ Get the ModelType for a Blender object. """
-    # TODO: Skinning support, etc
 
-    if obj.type in MESH_OBJECT_TYPES:
-        return ModelType.STATIC
+    if obj.type in MESH_OBJECT_TYPES and not skel_only:
+        if obj.vertex_groups:
+            return ModelType.SKIN
+        else:
+            return ModelType.STATIC
 
     return ModelType.NULL
 
@@ -193,6 +241,8 @@ def get_is_model_hidden(obj: bpy.types.Object) -> bool:
 
     name = obj.name.lower()
 
+    if name.startswith("c_"):
+        return True
     if name.startswith("sv_"):
         return True
     if name.startswith("p_"):
@@ -249,6 +299,9 @@ def get_collision_primitive(obj: bpy.types.Object) -> CollisionPrimitive:
 
     return primitive
 
+
+
+
 def get_collision_primitive_shape(obj: bpy.types.Object) -> CollisionPrimitiveShape:
     """ Gets the CollisionPrimitiveShape of an object or raises an error if
         it can't. """
@@ -262,8 +315,14 @@ def get_collision_primitive_shape(obj: bpy.types.Object) -> CollisionPrimitiveSh
     if "box" in name or "cube" in name or "cuboid" in name:
         return CollisionPrimitiveShape.BOX
 
+    # arc170 fighter has examples of box colliders without proper naming
+    prim_type = obj.swbf_msh_coll_prim.prim_type
+    if prim_type in [item.value for item in CollisionPrimitiveShape]:
+        return CollisionPrimitiveShape(prim_type)
+
     raise RuntimeError(f"Object '{obj.name}' has no primitive type specified in it's name!")
 
+
 def check_for_bad_lod_suffix(obj: bpy.types.Object):
     """ Checks if the object has an LOD suffix that is known to be ignored by  """
 
@@ -320,11 +379,41 @@ def select_objects(export_target: str) -> List[bpy.types.Object]:
 
     return objects + parents
 
-def convert_vector_space(vec: Vector) -> Vector:
-    return Vector((-vec.x, vec.z, vec.y))
 
-def convert_scale_space(vec: Vector) -> Vector:
-    return Vector(vec.xzy)
 
-def convert_rotation_space(quat: Quaternion) -> Quaternion:
-    return Quaternion((-quat.w, quat.x, -quat.z, -quat.y))
+def expand_armature(armature: bpy.types.Object) -> List[Model]:
+
+    proper_BONES = get_real_BONES(armature)
+
+    bones: List[Model] = []
+
+    for bone in armature.data.bones:
+        model = Model()
+
+        transform = bone.matrix_local
+
+        if bone.parent:
+            transform = bone.parent.matrix_local.inverted() @ transform
+            model.parent = bone.parent.name
+        # If the bone has no parent_bone:
+        #   set model parent to SKIN object if there is one
+        #   set model parent to armature parent if there is one
+        else:
+            for child_obj in armature.children:
+                if child_obj.vertex_groups and not get_is_model_hidden(child_obj) and not child_obj.parent_bone:
+                    model.parent = child_obj.name
+                    break
+            if not model.parent and armature.parent:
+                model.parent = armature.parent.name
+
+
+        local_translation, local_rotation, _ = transform.decompose()
+
+        model.model_type = ModelType.BONE if bone.name in proper_BONES else ModelType.NULL
+        model.name = bone.name
+        model.transform.rotation = convert_rotation_space(local_rotation)
+        model.transform.translation = convert_vector_space(local_translation)
+
+        bones.append(model)
+
+    return bones

addons/io_scene_swbf_msh/msh_model_utilities.py

@@ -3,8 +3,41 @@
 from typing import List
 from .msh_model import *
 from .msh_utilities import *
+import mathutils
+import math
 from mathutils import Vector, Matrix
 
+
+def inject_dummy_data(model : Model):
+    """  Adds a triangle and material to the model (scene root).  Needed to export zenasst-compatible skeletons. """
+    model.hidden = True
+
+    dummy_seg = GeometrySegment()
+    dummy_seg.material_name = ""
+
+    dummy_seg.positions = [Vector((0.0,0.1,0.0)), Vector((0.1,0.0,0.0)), Vector((0.0,0.0,0.1))]
+    dummy_seg.normals = [Vector((0.0,1.0,0.0)), Vector((1.0,0.0,0.0)), Vector((0.0,0.0,1.0))]
+    dummy_seg.texcoords = [Vector((0.1,0.1)), Vector((0.2,0.2)), Vector((0.3,0.3))]
+    tri = [[0,1,2]]
+    dummy_seg.triangles = tri
+    dummy_seg.polygons = tri
+    dummy_seg.triangle_strips = tri
+
+    model.geometry = [dummy_seg]
+    model.model_type = ModelType.STATIC
+
+def convert_vector_space(vec: Vector) -> Vector:
+    return Vector((-vec.x, vec.z, vec.y))
+
+def convert_scale_space(vec: Vector) -> Vector:
+    return Vector(vec.xzy)
+
+def convert_rotation_space(quat: Quaternion) -> Quaternion:
+    return Quaternion((-quat.w, quat.x, -quat.z, -quat.y))
+
+def model_transform_to_matrix(transform: ModelTransform):
+    return Matrix.Translation(convert_vector_space(transform.translation)) @ convert_rotation_space(transform.rotation).to_matrix().to_4x4()
+
 def scale_segments(scale: Vector, segments: List[GeometrySegment]):
     """ Scales are positions in the GeometrySegment list. """
 
@@ -114,3 +147,4 @@ def is_model_name_unused(name: str, models: List[Model]) -> bool:
             return False
 
     return True
+

addons/io_scene_swbf_msh/msh_scene.py

@@ -4,17 +4,15 @@
 from dataclasses import dataclass, field
 from typing import List, Dict
 from copy import copy
+
 import bpy
 from mathutils import Vector
-from .msh_model import Model
-from .msh_model_gather import gather_models
-from .msh_model_utilities import sort_by_parent, has_multiple_root_models, reparent_model_roots, get_model_world_matrix
-from .msh_model_triangle_strips import create_models_triangle_strips
+
+from .msh_model import Model, Animation, ModelType
 from .msh_material import *
-from .msh_material_gather import gather_materials
-from .msh_material_utilities import remove_unused_materials
 from .msh_utilities import *
 
+
 @dataclass
 class SceneAABB:
     """ Class representing an axis-aligned bounding box. """
@@ -44,53 +42,6 @@ class Scene:
     materials: Dict[str, Material] = field(default_factory=dict)
     models: List[Model] = field(default_factory=list)
 
-def create_scene(generate_triangle_strips: bool, apply_modifiers: bool, export_target: str) -> Scene:
-    """ Create a msh Scene from the active Blender scene. """
+    animation: Animation = None
 
-    scene = Scene()
-
-    scene.name = bpy.context.scene.name
-
-    scene.materials = gather_materials()
-
-    scene.models = gather_models(apply_modifiers=apply_modifiers, export_target=export_target)
-    scene.models = sort_by_parent(scene.models)
-
-    if generate_triangle_strips:
-        scene.models = create_models_triangle_strips(scene.models)
-    else:
-        for model in scene.models:
-            if model.geometry:
-                for segment in model.geometry:
-                    segment.triangle_strips = segment.triangles
-
-    if has_multiple_root_models(scene.models):
-        scene.models = reparent_model_roots(scene.models)
-
-    scene.materials = remove_unused_materials(scene.materials, scene.models)
-
-    return scene
-
-def create_scene_aabb(scene: Scene) -> SceneAABB:
-    """ Create a SceneAABB for a Scene. """
-
-    global_aabb = SceneAABB()
-
-    for model in scene.models:
-        if model.geometry is None or model.hidden:
-            continue
-
-        model_world_matrix = get_model_world_matrix(model, scene.models)
-        model_aabb = SceneAABB()
-
-        for segment in model.geometry:
-            segment_aabb = SceneAABB()
-
-            for pos in segment.positions:
-                segment_aabb.integrate_position(model_world_matrix @ pos)
-
-            model_aabb.integrate_aabb(segment_aabb)
-
-        global_aabb.integrate_aabb(model_aabb)
-
-    return global_aabb
+    skeleton: List[int] = field(default_factory=list)

addons/io_scene_swbf_msh/msh_scene_read.py

@@ -0,0 +1,470 @@
+""" Contains functions for extracting a scene from a .msh file"""
+
+from itertools import islice
+from typing import Dict
+from .msh_scene import Scene
+from .msh_model import *
+from .msh_material import *
+from .msh_utilities import *
+
+from .crc import *
+
+from .chunked_file_reader import Reader
+
+
+
+# Current model position
+model_counter = 0
+
+# Used to remap MNDX to the MODL's actual position
+mndx_remap : Dict[int, int]  = {}
+
+# How much to print
+debug_level = 0
+
+
+'''
+Debug levels just indicate how much info should be printed.
+0 = nothing
+1 = just blurbs about valuable info in the chunks
+2 = #1 + full chunk structure
+'''
+def read_scene(input_file, anim_only=False, debug=0) -> Scene:
+
+    global debug_level
+    debug_level = debug
+
+    scene = Scene()
+    scene.models = []
+    scene.materials = {}
+
+    global mndx_remap
+    mndx_remap = {}
+
+    global model_counter
+    model_counter = 0
+
+    with Reader(file=input_file, debug=debug_level>0) as head:
+
+        head.skip_until("HEDR")
+
+        with head.read_child() as hedr:
+
+            while hedr.could_have_child():
+
+                next_header = hedr.peak_next_header()
+
+                if next_header == "MSH2":
+
+                    with hedr.read_child() as msh2:
+                        
+                        if not anim_only:
+                            materials_list = []
+
+                            while (msh2.could_have_child()):
+
+                                next_header = msh2.peak_next_header()
+
+                                if next_header == "SINF":
+                                    with msh2.read_child() as sinf:
+                                        pass
+
+                                elif next_header == "MATL":
+                                    with msh2.read_child() as matl:
+                                        materials_list += _read_matl_and_get_materials_list(matl)
+                                        for i,mat in enumerate(materials_list):
+                                            scene.materials[mat.name] = mat
+
+                                elif next_header == "MODL":
+                                    with msh2.read_child() as modl:
+                                        scene.models.append(_read_modl(modl, materials_list))
+
+                                else:
+                                    msh2.skip_bytes(1)
+
+                elif next_header == "SKL2":
+                    with hedr.read_child() as skl2:
+                        num_bones = skl2.read_u32()
+                        scene.skeleton = [skl2.read_u32(5)[0] for i in range(num_bones)]
+                    
+                elif next_header == "ANM2":
+                    with hedr.read_child() as anm2:
+                        scene.animation = _read_anm2(anm2)
+
+                else:
+                    hedr.skip_bytes(1)
+
+    # Print models in skeleton
+    if scene.skeleton and debug_level > 0:
+        print("Skeleton models: ")
+        for model in scene.models:
+            for i in range(len(scene.skeleton)):                
+                if to_crc(model.name) == scene.skeleton[i]:
+                    print("\t" + model.name)
+                    if model.model_type == ModelType.SKIN:
+                        scene.skeleton.pop(i)
+                    break
+
+    '''
+    Iterate through every vertex weight in the scene and 
+    change its index to directly reference its bone's index.  
+    It will reference the MNDX of its bone's MODL by default.
+    '''
+    
+    for model in scene.models:
+        if model.geometry:
+            for seg in model.geometry:
+                if seg.weights:
+                    for weight_set in seg.weights:
+                        for vweight in weight_set:
+                            if vweight.bone in mndx_remap:
+                                vweight.bone = mndx_remap[vweight.bone]
+                            else:
+                                vweight.bone = 0
+                    
+    return scene
+
+
+def _read_matl_and_get_materials_list(matl: Reader) -> List[Material]:
+    materials_list: List[Material] = []
+
+    num_mats = matl.read_u32()
+
+    for _ in range(num_mats):
+        with matl.read_child() as matd:
+            materials_list.append(_read_matd(matd))
+
+    return materials_list
+
+
+
+def _read_matd(matd: Reader) -> Material:
+
+    mat = Material()
+
+    while matd.could_have_child():
+
+        next_header = matd.peak_next_header()
+
+        if next_header == "NAME":
+            with matd.read_child() as name:
+                mat.name = name.read_string()
+
+        elif next_header == "DATA":
+            with matd.read_child() as data:
+                data.read_f32(4) # Diffuse Color (Seams to get ignored by modelmunge)
+                mat.specular_color = data.read_f32(4)
+                data.read_f32(4) # Ambient Color (Seams to get ignored by modelmunge and Zero(?))
+                data.read_f32()  # Specular Exponent/Decay (Gets ignored by RedEngine in SWBFII for all known materials)    
+    
+        elif next_header == "ATRB":
+            with matd.read_child() as atrb:
+                mat.flags = MaterialFlags(atrb.read_u8())                
+                mat.rendertype = Rendertype(atrb.read_u8())
+                mat.data = atrb.read_u8(2)
+
+        elif next_header == "TX0D":
+            with matd.read_child() as tx0d:
+                mat.texture0 = tx0d.read_string()
+
+        elif next_header == "TX1D":
+            with matd.read_child() as tx1d:
+                mat.texture1 = tx1d.read_string()
+
+        elif next_header == "TX2D":
+            with matd.read_child() as tx2d:
+                mat.texture2 = tx2d.read_string()
+
+        elif next_header == "TX3D":
+            with matd.read_child() as tx3d:
+                mat.texture3 = tx3d.read_string()
+
+        else:
+            matd.skip_bytes(1)
+
+    return mat
+
+
+def _read_modl(modl: Reader, materials_list: List[Material]) -> Model:
+
+    model = Model()
+
+    while modl.could_have_child():
+
+        next_header = modl.peak_next_header()
+
+        if next_header == "MTYP":
+            with modl.read_child() as mtyp:
+                model.model_type = ModelType(mtyp.read_u32())
+
+        elif next_header == "MNDX":
+            with modl.read_child() as mndx:
+                index = mndx.read_u32()
+
+                global model_counter
+                global mndx_remap
+                mndx_remap[index] = model_counter
+
+                model_counter += 1
+
+        elif next_header == "NAME":
+            with modl.read_child() as name:
+                model.name = name.read_string()
+
+        elif next_header == "PRNT":
+            with modl.read_child() as prnt:
+                model.parent = prnt.read_string()
+
+        elif next_header == "FLGS":
+            with modl.read_child() as flgs:
+                model.hidden = flgs.read_u32()
+
+        elif next_header == "TRAN":
+            with modl.read_child() as tran:
+                model.transform = _read_tran(tran)
+
+        elif next_header == "GEOM":
+            model.geometry = []
+            envelope = []
+
+            with modl.read_child() as geom:
+
+                while geom.could_have_child():
+                    next_header_geom = geom.peak_next_header()
+
+                    if next_header_geom == "SEGM":
+                        with geom.read_child() as segm:
+                           model.geometry.append(_read_segm(segm, materials_list))
+
+                    elif next_header_geom == "ENVL":
+                        with geom.read_child() as envl:
+                            num_indicies = envl.read_u32()
+                            envelope += [envl.read_u32() for _ in range(num_indicies)]
+                    
+                    elif next_header_geom == "CLTH":
+                        with geom.read_child() as clth:
+                            pass
+                    
+                    else:
+                        geom.skip_bytes(1)
+
+            for seg in model.geometry:
+                if seg.weights and envelope:
+                    for weight_set in seg.weights:
+                        for vertex_weight in weight_set:
+                            vertex_weight.bone = envelope[vertex_weight.bone]
+
+        elif next_header == "SWCI":
+            prim = CollisionPrimitive()
+            with modl.read_child() as swci:
+                prim.shape = CollisionPrimitiveShape(swci.read_u32())
+                prim.radius = swci.read_f32()
+                prim.height = swci.read_f32()
+                prim.length = swci.read_f32()
+            model.collisionprimitive = prim
+
+        else:
+            modl.skip_bytes(1)
+
+    return model
+
+
+def _read_tran(tran: Reader) -> ModelTransform:
+
+    xform = ModelTransform()
+
+    tran.skip_bytes(12) #ignore scale
+
+    xform.rotation = tran.read_quat()
+    xform.translation = tran.read_vec()
+
+    return xform
+
+
+def _read_segm(segm: Reader, materials_list: List[Material]) -> GeometrySegment:
+
+    geometry_seg = GeometrySegment()
+
+    while segm.could_have_child():
+
+        next_header = segm.peak_next_header()
+
+        if next_header == "MATI":
+            with segm.read_child() as mati:
+                geometry_seg.material_name = materials_list[mati.read_u32()].name
+
+        elif next_header == "POSL":
+            with segm.read_child() as posl:
+                num_positions = posl.read_u32()
+
+                for _ in range(num_positions):
+                    geometry_seg.positions.append(Vector(posl.read_f32(3)))
+
+        elif next_header == "NRML":
+            with segm.read_child() as nrml:
+                num_normals = nrml.read_u32()
+                
+                for _ in range(num_positions):
+                    geometry_seg.normals.append(Vector(nrml.read_f32(3))) 
+
+        elif next_header == "CLRL":
+            geometry_seg.colors = []
+
+            with segm.read_child() as clrl:
+                num_colors = clrl.read_u32()
+
+                for _ in range(num_colors):
+                    geometry_seg.colors += unpack_color(clrl.read_u32())
+
+        elif next_header == "UV0L":
+            with segm.read_child() as uv0l:
+                num_texcoords = uv0l.read_u32()
+
+                for _ in range(num_texcoords):
+                    geometry_seg.texcoords.append(Vector(uv0l.read_f32(2))) 
+
+        # TODO: Can't remember exact issue here...
+        elif next_header == "NDXL":
+            
+            with segm.read_child() as ndxl:
+                pass
+                '''
+                num_polygons = ndxl.read_u32()
+
+                for _ in range(num_polygons):
+                    polygon = ndxl.read_u16(ndxl.read_u16())
+                    geometry_seg.polygons.append(polygon)
+                '''
+
+        elif next_header == "NDXT":
+            with segm.read_child() as ndxt:
+                num_tris = ndxt.read_u32()
+
+                for _ in range(num_tris):
+                    geometry_seg.triangles.append(ndxt.read_u16(3))
+        
+        # There could be major issues with this, so far it hasn't failed but its inelegance irks me
+        elif next_header == "STRP":
+            strips : List[List[int]] = []
+
+            with segm.read_child() as strp:
+                num_indicies = strp.read_u32()
+
+                num_indicies_read = 0
+
+                curr_strip = []
+                previous_flag = False
+
+                if num_indicies > 0:
+                    index, index1 = strp.read_u16(2)
+                    curr_strip = [index & 0x7fff, index1 & 0x7fff]
+                    num_indicies_read += 2
+
+                for i in range(num_indicies - 2):
+                    index = strp.read_u16(1)
+
+                    if index & 0x8000 > 0:
+                        index = index & 0x7fff
+
+                        if previous_flag:
+                            previous_flag = False
+                            curr_strip.append(index)
+                            strips.append(curr_strip[:-2])
+                            curr_strip = curr_strip[-2:]
+                            continue
+                        else:
+                            previous_flag = True
+
+                    else:
+                        previous_flag = False
+                     
+                    curr_strip.append(index)
+
+            geometry_seg.triangle_strips = strips
+
+            # TODO: Dont know how to handle trailing 0 bug yet: https://schlechtwetterfront.github.io/ze_filetypes/msh.html#STRP
+            #if segm.read_u16 != 0: 
+            #    segm.skip_bytes(-2)
+
+        elif next_header == "WGHT":
+            with segm.read_child() as wght:
+                
+                geometry_seg.weights = []
+                num_weights = wght.read_u32()
+
+                for _ in range(num_weights):
+                    weight_set = []
+                    for _ in range(4):
+                        index = wght.read_u32()
+                        value = wght.read_f32()
+
+                        if value > 0.000001:
+                            weight_set.append(VertexWeight(value,index))
+
+                    geometry_seg.weights.append(weight_set)
+
+        else:
+            segm.skip_bytes(1)
+
+    return geometry_seg
+
+
+
+def _read_anm2(anm2: Reader) -> Animation:
+
+    anim = Animation()
+
+    while anm2.could_have_child():
+
+        next_header = anm2.peak_next_header()
+
+        if next_header == "CYCL":
+            with anm2.read_child() as cycl:
+                # Dont even know what CYCL's data does.  Tried playing 
+                # with the values but didn't change anything in zenasset or ingame...
+
+                # Besides num_anims, which is never > 1 for any SWBF1/2 mshs I've seen
+
+                '''
+                num_anims = cycl.read_u32()
+
+                for _ in range(num_anims):
+                    cycl.skip_bytes(64)
+                    print("CYCL play style {}".format(cycl.read_u32(4)[1]))
+                '''
+                pass
+
+        elif next_header == "KFR3":
+            with anm2.read_child() as kfr3:
+
+                num_bones = kfr3.read_u32()
+
+                bone_crcs = []
+
+                for _ in range(num_bones):
+
+                    bone_crc = kfr3.read_u32()
+                    bone_crcs.append(bone_crc)
+
+                    frames = ([],[])
+
+                    frametype = kfr3.read_u32()
+
+                    num_loc_frames = kfr3.read_u32()
+                    num_rot_frames = kfr3.read_u32()
+
+                    for i in range(num_loc_frames):
+                        frames[0].append(TranslationFrame(kfr3.read_u32(), kfr3.read_vec()))
+
+                    for i in range(num_rot_frames):
+                        frames[1].append(RotationFrame(kfr3.read_u32(), kfr3.read_quat()))
+
+                    anim.bone_frames[bone_crc] = frames
+
+        else:
+            anm2.skip_bytes(1)
+
+    return anim
+
+
+

addons/io_scene_swbf_msh/msh_scene_save.py

@@ -2,12 +2,16 @@
 
 from itertools import islice
 from typing import Dict
-from .msh_scene import Scene, create_scene_aabb
+from .msh_scene import Scene
+from .msh_scene_utilities import create_scene_aabb
 from .msh_model import *
 from .msh_material import *
 from .msh_writer import Writer
 from .msh_utilities import *
 
+from .crc import *
+
+
 def save_scene(output_file, scene: Scene):
     """ Saves scene to the supplied file. """
 
@@ -17,6 +21,7 @@ def save_scene(output_file, scene: Scene):
             with msh2.create_child("SINF") as sinf:
                 _write_sinf(sinf, scene)
 
+            model_index: Dict[str, int] = {model.name:(i+1) for i, model in enumerate(scene.models)}
             material_index: Dict[str, int] = {}
 
             with msh2.create_child("MATL") as matl:
@@ -24,7 +29,24 @@ def save_scene(output_file, scene: Scene):
 
             for index, model in enumerate(scene.models):
                 with msh2.create_child("MODL") as modl:
-                    _write_modl(modl, model, index, material_index)
+                    _write_modl(modl, model, index, material_index, model_index)
+
+        # Contrary to earlier belief, anim/skel info does not need to be exported for animated models
+        # BUT, unless a model is a BONE, it wont animate!
+        # This is not necessary when exporting animations.  When exporting animations, the following
+        # chunks are necessary and the animated models can be marked as NULLs 
+        if scene.animation is not None:
+            # Seems as though SKL2 is wholly unneccessary from SWBF's perspective (for models and anims),
+            # but it is there in all stock models/anims
+            with hedr.create_child("SKL2") as skl2:
+                _write_skl2(skl2, scene.animation)
+
+            # Def not necessary, including anyways
+            with hedr.create_child("BLN2") as bln2:
+                _write_bln2(bln2, scene.animation)
+
+            with hedr.create_child("ANM2") as anm2:              
+                _write_anm2(anm2, scene.animation)
 
         with hedr.create_child("CL1L"):
             pass
@@ -76,7 +98,7 @@ def _write_matd(matd: Writer, material_name: str, material: Material):
         data.write_f32(1.0, 1.0, 1.0, 1.0) # Diffuse Color (Seams to get ignored by modelmunge)
         data.write_f32(material.specular_color[0], material.specular_color[1],
                        material.specular_color[2], 1.0)
-        data.write_f32(0.0, 0.0, 0.0, 1.0) # Ambient Color (Seams to get ignored by modelmunge and Zero(?))
+        data.write_f32(1.0, 1.0, 1.0, 1.0) # Ambient Color (Seams to get ignored by modelmunge and Zero(?))
         data.write_f32(50.0) # Specular Exponent/Decay (Gets ignored by RedEngine in SWBFII for all known materials)    
     with matd.create_child("ATRB") as atrb:
         atrb.write_u8(material.flags.value)
@@ -97,12 +119,12 @@ def _write_matd(matd: Writer, material_name: str, material: Material):
             with matd.create_child("TX3D") as tx3d:
                 tx3d.write_string(material.texture3)
 
-def _write_modl(modl: Writer, model: Model, index: int, material_index: Dict[str, int]):
+def _write_modl(modl: Writer, model: Model, index: int, material_index: Dict[str, int], model_index: Dict[str, int]):
     with modl.create_child("MTYP") as mtyp:
         mtyp.write_u32(model.model_type.value)
 
     with modl.create_child("MNDX") as mndx:
-        mndx.write_u32(index)
+        mndx.write_u32(index + 1)
 
     with modl.create_child("NAME") as name:
         name.write_string(model.name)
@@ -120,10 +142,20 @@ def _write_modl(modl: Writer, model: Model, index: int, material_index: Dict[str
 
     if model.geometry is not None:
         with modl.create_child("GEOM") as geom:
+
+            with geom.create_child("BBOX") as bbox:
+                bbox.write_f32(0.0, 0.0, 0.0, 1.0)
+                bbox.write_f32(0, 0, 0)
+                bbox.write_f32(1.0,1.0,1.0,2.0)
+
             for segment in model.geometry:
                 with geom.create_child("SEGM") as segm:
                     _write_segm(segm, segment, material_index)
 
+            if model.bone_map:
+                with geom.create_child("ENVL") as envl:
+                    _write_envl(envl, model, model_index)
+
     if model.collisionprimitive is not None:
         with modl.create_child("SWCI") as swci:
             swci.write_u32(model.collisionprimitive.shape.value)
@@ -147,10 +179,14 @@ def _write_segm(segm: Writer, segment: GeometrySegment, material_index: Dict[str
         for position in segment.positions:
             posl.write_f32(position.x, position.y, position.z)
 
+    if segment.weights:
+        with segm.create_child("WGHT") as wght:
+            _write_wght(wght, segment.weights)
+
     with segm.create_child("NRML") as nrml:
         nrml.write_u32(len(segment.normals))
 
-        for normal in segment.normals:
+        for i,normal in enumerate(segment.normals):
             nrml.write_f32(normal.x, normal.y, normal.z)
 
     if segment.colors is not None:
@@ -160,11 +196,12 @@ def _write_segm(segm: Writer, segment: GeometrySegment, material_index: Dict[str
             for color in segment.colors:
                 clrl.write_u32(pack_color(color))
 
-    with segm.create_child("UV0L") as uv0l:
-        uv0l.write_u32(len(segment.texcoords))
+    if segment.texcoords is not None:
+        with segm.create_child("UV0L") as uv0l:
+            uv0l.write_u32(len(segment.texcoords))
 
-        for texcoord in segment.texcoords:
-            uv0l.write_f32(texcoord.x, texcoord.y)
+            for texcoord in segment.texcoords:
+                uv0l.write_f32(texcoord.x, texcoord.y)
 
     with segm.create_child("NDXL") as ndxl:
         ndxl.write_u32(len(segment.polygons))
@@ -189,3 +226,82 @@ def _write_segm(segm: Writer, segment: GeometrySegment, material_index: Dict[str
 
             for index in islice(strip, 2, len(strip)):
                 strp.write_u16(index)
+
+'''
+SKINNING CHUNKS
+'''
+def _write_wght(wght: Writer, weights: List[List[VertexWeight]]):
+    wght.write_u32(len(weights))
+
+    for weight_list in weights:
+        weight_list += [VertexWeight(0.0, 0)] * 4
+        weight_list = sorted(weight_list, key=lambda w: w.weight, reverse=True)
+        weight_list = weight_list[:4]
+
+        total_weight = max(sum(map(lambda w: w.weight, weight_list)), 1e-5)
+
+        for weight in weight_list:
+            wght.write_i32(weight.bone)
+            wght.write_f32(weight.weight / total_weight)
+
+def _write_envl(envl: Writer, model: Model, model_index: Dict[str, int]):
+    envl.write_u32(len(model.bone_map))
+    for bone_name in model.bone_map:
+        envl.write_u32(model_index[bone_name])
+
+'''
+SKELETON CHUNKS
+'''
+def _write_bln2(bln2: Writer, anim: Animation):
+    bones = anim.bone_frames.keys()
+    bln2.write_u32(len(bones))
+
+    for bone_crc in bones:
+        bln2.write_u32(bone_crc, 0) 
+
+def _write_skl2(skl2: Writer, anim: Animation):
+    bones = anim.bone_frames.keys()
+    skl2.write_u32(len(bones)) 
+
+    for bone_crc in bones:
+        skl2.write_u32(bone_crc, 0) #default values from docs
+        skl2.write_f32(1.0, 0.0, 0.0)
+
+'''
+ANIMATION CHUNKS
+'''
+def _write_anm2(anm2: Writer, anim: Animation):
+
+    with anm2.create_child("CYCL") as cycl:
+        
+        cycl.write_u32(1)
+        cycl.write_string(anim.name)
+        
+        for _ in range(63 - len(anim.name)):
+            cycl.write_u8(0)
+        
+        cycl.write_f32(anim.framerate)
+        cycl.write_u32(0) #what does play style refer to?
+        cycl.write_u32(anim.start_index, anim.end_index) #first frame indices
+
+
+    with anm2.create_child("KFR3") as kfr3:
+        
+        kfr3.write_u32(len(anim.bone_frames))
+
+        for bone_crc in anim.bone_frames:
+            kfr3.write_u32(bone_crc)
+            kfr3.write_u32(0) #what is keyframe type?
+
+            translation_frames, rotation_frames = anim.bone_frames[bone_crc]
+
+            kfr3.write_u32(len(translation_frames), len(rotation_frames))
+
+            for frame in translation_frames:
+                kfr3.write_u32(frame.index)
+                kfr3.write_f32(frame.translation.x, frame.translation.y, frame.translation.z)
+
+            for frame in rotation_frames:
+                kfr3.write_u32(frame.index)
+                kfr3.write_f32(frame.rotation.x, frame.rotation.y, frame.rotation.z, frame.rotation.w)
+                

addons/io_scene_swbf_msh/msh_scene_utilities.py

@@ -0,0 +1,85 @@
+""" Contains Scene object for representing a .msh file and the function to create one
+    from a Blender scene.  """
+
+from dataclasses import dataclass, field
+from typing import List, Dict
+from copy import copy
+import bpy
+from mathutils import Vector
+from .msh_model import Model, Animation, ModelType
+from .msh_scene import Scene, SceneAABB
+from .msh_model_gather import gather_models
+from .msh_model_utilities import sort_by_parent, has_multiple_root_models, reparent_model_roots, get_model_world_matrix, inject_dummy_data
+from .msh_model_triangle_strips import create_models_triangle_strips
+from .msh_material import *
+from .msh_material_gather import gather_materials
+from .msh_material_utilities import remove_unused_materials
+from .msh_utilities import *
+from .msh_anim_gather import extract_anim
+
+
+
+def create_scene(generate_triangle_strips: bool, apply_modifiers: bool, export_target: str, skel_only: bool, export_anim: bool) -> Scene:
+    """ Create a msh Scene from the active Blender scene. """
+
+    scene = Scene()
+
+    scene.name = bpy.context.scene.name
+
+    scene.materials = gather_materials()
+
+    scene.models, armature_obj = gather_models(apply_modifiers=apply_modifiers, export_target=export_target, skeleton_only=skel_only)
+    scene.models = sort_by_parent(scene.models)
+
+    if generate_triangle_strips:
+        scene.models = create_models_triangle_strips(scene.models)
+    else:
+        for model in scene.models:
+            if model.geometry:
+                for segment in model.geometry:
+                    segment.triangle_strips = segment.triangles
+
+    if has_multiple_root_models(scene.models):
+        scene.models = reparent_model_roots(scene.models)
+
+    scene.materials = remove_unused_materials(scene.materials, scene.models)
+ 
+
+    root = scene.models[0]
+
+    if export_anim:
+        if armature_obj is not None:
+            scene.animation = extract_anim(armature_obj, root.name)
+        else:
+            raise Exception("Export Error: Could not find an armature object from which to export an animation!")
+
+    if skel_only and root.model_type == ModelType.NULL:
+        # For ZenAsset
+        inject_dummy_data(root)
+
+    return scene
+
+
+def create_scene_aabb(scene: Scene) -> SceneAABB:
+    """ Create a SceneAABB for a Scene. """
+
+    global_aabb = SceneAABB()
+
+    for model in scene.models:
+        if model.geometry is None or model.hidden:
+            continue
+
+        model_world_matrix = get_model_world_matrix(model, scene.models)
+        model_aabb = SceneAABB()
+
+        for segment in model.geometry:
+            segment_aabb = SceneAABB()
+
+            for pos in segment.positions:
+                segment_aabb.integrate_position(model_world_matrix @ pos)
+
+            model_aabb.integrate_aabb(segment_aabb)
+
+        global_aabb.integrate_aabb(model_aabb)
+
+    return global_aabb

addons/io_scene_swbf_msh/msh_skeleton_properties.py

@@ -0,0 +1,48 @@
+""" Keeps track of exact skeleton when imported.  Possibly needed for exporting skeleton-compatible animations.  Will
+    probably be needed (with a matrix property) if we:
+        - add tip-to-tail adjustment and/or omit roots/effectors for imported skeletons to keep track of the original bone transforms
+        - add some sort of basepose-adjustment animation import option for already imported skeletons
+
+    I guess this might not need a panel, but I included it because the docs might need to reference it and 
+    people may want to exclude certain bones without deleting keyframes.
+"""
+
+import bpy
+from bpy.props import StringProperty
+from bpy.types import PropertyGroup
+
+
+class SkeletonProperties(PropertyGroup):
+        name: StringProperty(name="Name", default="Bone Name")
+
+
+
+class SkeletonPropertiesPanel(bpy.types.Panel):
+    """ Creates a Panel in the Object properties window """
+    bl_label = "SWBF Skeleton Properties"
+    bl_idname = "SKELETON_PT_swbf_msh"
+    bl_space_type = 'PROPERTIES'
+    bl_region_type = 'WINDOW'
+    bl_context = "data"
+    bl_options = {'DEFAULT_CLOSED'}
+
+
+    @classmethod
+    def poll(cls, context):
+        return context.object.type == 'ARMATURE' and context.object.data.swbf_msh_skel and len(context.object.data.swbf_msh_skel) > 0
+
+
+    def draw(self, context):
+        if context.object is None:
+            return
+
+        layout = self.layout
+
+        skel_props = context.object.data.swbf_msh_skel
+
+        layout.label(text = "Bones In MSH Skeleton: ")
+
+        for prop in skel_props:
+            layout.prop(prop, "name")
+
+        

addons/io_scene_swbf_msh/msh_skeleton_utilities.py

@@ -0,0 +1,211 @@
+""" Helpers for SWBF skeleton-armature mapping """
+
+import bpy
+import math
+
+from typing import List, Set, Dict, Tuple
+
+from .msh_scene import Scene
+from .msh_model import *
+from .msh_model_utilities import *
+
+from .crc import *
+
+
+def has_preserved_skeleton(armature : bpy.types.Armature):
+    return len(armature.data.swbf_msh_skel) > 0
+
+
+
+'''Returns all bones that should be marked as BONE'''
+def get_real_BONES(armature: bpy.types.Armature) -> Set[str]:
+
+    # First priority, add the names of the skeleton preserved on import
+    skel_props = armature.data.swbf_msh_skel
+
+    # Second, add all keyed bones
+    action = armature.animation_data.action if armature.animation_data else None
+
+    # Third, just add all bones in armature
+
+    # Set of bones to include
+    real_bones : Set[str] = set()
+
+    if len(skel_props) > 0:
+        for bone in skel_props:
+            #print(f"{bone.name} is a real BONE")
+            real_bones.add(bone.name)
+    elif action:
+        for group in armature.animation_data.action.groups:
+            #print(f"{group.name} is a real BONE")
+            real_bones.add(group.name)
+    else:
+        for bone in armature.data.bones:
+            #print(f"{bone.name} is a real BONE")
+            real_bones.add(bone.name)
+
+    return real_bones
+
+
+
+
+
+'''
+Creates armature from the required nodes.  
+Assumes the required_skeleton is already sorted by parent. 
+
+Uses model_map to get the world matrix of each bone (hacky, see NOTE)
+'''
+def required_skeleton_to_armature(required_skeleton : List[Model], model_map : Dict[str, bpy.types.Object], msh_scene : Scene) -> bpy.types.Object:
+
+    armature = bpy.data.armatures.new("skeleton")
+    armature_obj = bpy.data.objects.new("skeleton", armature)
+    bpy.context.view_layer.active_layer_collection.collection.objects.link(armature_obj)
+
+ 
+    bones_set = set([model.name for model in required_skeleton])
+
+    armature_obj.select_set(True)
+    bpy.context.view_layer.objects.active = armature_obj
+    bpy.ops.object.mode_set(mode='EDIT')
+
+    for bone in required_skeleton:
+
+        edit_bone = armature.edit_bones.new(bone.name)
+
+        if bone.parent and bone.parent in bones_set:
+            edit_bone.parent = armature.edit_bones[bone.parent]
+
+        '''
+        NOTE: I recall there being some rare issue with the get_world_matrix utility func.
+        Never bothered to figure it out and referencing the bone object's world mat always works.
+        Bone objects will be deleted later.
+        '''
+        bone_obj = model_map[bone.name]
+
+        edit_bone.matrix = bone_obj.matrix_world
+        edit_bone.tail = bone_obj.matrix_world @ Vector((0.0,1.0,0.0))
+
+        bone_children = [b for b in get_model_children(bone, required_skeleton)]
+        
+        '''
+        Perhaps we'll add an option for importing bones tip-to-tail, but that would 
+        require preserving their original transforms as changing the tail position
+        changes the bones' transform...
+        '''
+        tail_pos = Vector()
+        if bone_children:
+            for bone_child in bone_children:
+                tail_pos += bone_obj.matrix_world.translation
+            tail_pos = tail_pos / len(bone_children) 
+            edit_bone.length = .5 #(tail_pos - edit_bone.head).magnitude
+        else:
+            bone_length = .5# edit_bone.parent.length if edit_bone.parent is not None else .5
+            edit_bone.tail = bone_obj.matrix_world @ Vector((0.0,bone_length,0.0))
+
+    bpy.ops.object.mode_set(mode='OBJECT')
+    armature_obj.select_set(True)
+    bpy.context.view_layer.update() 
+
+    return armature_obj
+
+
+
+
+'''
+Ok, so this method is crucial.  What this does is: 
+    1) Find all nodes that are weighted to by skinned segments.
+    2) A node must be included in the armature if it:
+        - is in SKL2 and is not the scene root
+        - has model_type == BONE
+        - is weighted to
+        - has a parent and child that must be in the armature
+
+This may need a lot of adjustments, don't think I can prove it's validity but it has worked very well
+and handles all stock + ZETools + Pandemic XSI exporter models I've tested 
+'''
+def extract_required_skeleton(scene: Scene) -> List[Model]:
+
+    # Will map Model names to Models in scene, for convenience
+    model_dict : Dict[str, Model] = {}
+
+    '''
+    Will contain hashes of all models that definitely need to be in the skeleton/armature.
+    We initialize it with the contents of SKL2 i.e. the nodes that are animated.
+    For now this includes the scene root, but that'll be excluded later.
+    '''
+    skeleton_hashes = set(scene.skeleton)
+
+    '''
+    We also need to add all nodes that are weighted to.  These are not necessarily in
+    SKL2, as SKL2 seems to only reference nodes that are keyframed.
+    However, sometimes SKL2 is not included when it should be, but it can be mostly recovered
+    by checking which models are BONEs.
+    '''
+    for model in scene.models:
+        model_dict[model.name] = model
+
+        if model.model_type == ModelType.BONE:
+            skeleton_hashes.add(to_crc(model.name))    
+
+        elif model.geometry:
+            for seg in model.geometry:
+                if seg.weights:
+                    for weight_set in seg.weights:
+                        for weight in weight_set:
+                            model_weighted_to = scene.models[weight.bone]
+
+                            if to_crc(model_weighted_to.name) not in skeleton_hashes:
+                                skeleton_hashes.add(to_crc(model_weighted_to.name))
+
+    # The result of this function (to be sorted by parent)
+    required_skeleton_models = []
+
+    # Set of nodes to be included in required skeleton/were visited
+    visited_nodes = set()
+
+    '''
+    Here we add all skeleton nodes (except root) and any necessary ancestors to the armature.
+        - e.g. in bone_x/eff_x/eff_y, the effectors do not have to be in armature, as they are not ancestors of a bone
+        - but  in bone_x/eff_x/eff_y/bone_y, they do.
+    '''
+    for bone in sort_by_parent(scene.models):
+
+        # make sure we exclude the scene root and any nodes irrelevant to the armature
+        if not bone.parent or to_crc(bone.name) not in skeleton_hashes:
+            continue
+
+        potential_bones = [bone]
+        visited_nodes.add(bone.name)
+
+        # Stacked transform will be needed if we decide to include an option for excluding effectors/roots or 
+        # connecting bones tip-to-tail
+        #stacked_transform = model_transform_to_matrix(bone.transform)
+        
+        curr_ancestor = model_dict[bone.parent]
+
+        while True:
+
+            # If we hit a non-skin scene root, that means we just add the bone we started with, no ancestors.
+            if not curr_ancestor.parent and curr_ancestor.model_type != ModelType.SKIN:
+                required_skeleton_models.append(bone)
+                visited_nodes.add(bone.name)
+                break 
+
+            # If we encounter another bone, a skin, or a previously visited object, we need to add the bone and its 
+            # ancestors.
+            elif to_crc(curr_ancestor.name) in scene.skeleton or curr_ancestor.model_type == ModelType.SKIN or curr_ancestor.name in visited_nodes:
+                for potential_bone in potential_bones:
+                    required_skeleton_models.append(potential_bone)
+                    visited_nodes.add(potential_bone.name)
+                break
+
+            # Add ancestor to potential bones, update next ancestor
+            else:
+                if curr_ancestor.name not in visited_nodes:
+                    potential_bones.insert(0, curr_ancestor)
+                curr_ancestor = model_dict[curr_ancestor.parent]
+                
+                #stacked_transform = model_transform_to_matrix(curr_ancestor.transform) @ stacked_transform
+
+    return required_skeleton_models              

addons/io_scene_swbf_msh/msh_to_blend.py

@@ -0,0 +1,374 @@
+""" Gathers the Blender objects from the current scene and returns them as a list of
+    Model objects. """
+
+import bpy
+import bmesh
+import math
+
+from enum import Enum
+from typing import List, Set, Dict, Tuple
+
+from .msh_scene import Scene
+from .msh_material_to_blend import *
+from .msh_model import *
+from .msh_skeleton_utilities import *
+from .msh_model_gather import get_is_model_hidden
+
+
+from .crc import *
+
+import os
+
+
+
+# Extracts and applies anims in the scene to the currently selected armature
+def extract_and_apply_anim(filename : str, scene : Scene):
+
+    arma = bpy.context.view_layer.objects.active
+
+    if not arma or arma.type != 'ARMATURE':
+        raise Exception("Select an armature to attach the imported animation to!")
+
+    if scene.animation is None:
+        raise Exception("No animation found in msh file!")
+    
+    else:
+        head, tail = os.path.split(filename)
+        anim_name = tail.split(".")[0]
+        action = bpy.data.actions.new(anim_name)
+        action.use_fake_user = True
+
+        if not arma.animation_data:
+            arma.animation_data_create()
+
+
+        # Record the starting transforms of each bone.  Pose space is relative 
+        # to bones starting transforms.  Starting = in edit mode
+        bone_bind_poses = {}
+
+        bpy.context.view_layer.objects.active = arma
+        bpy.ops.object.mode_set(mode='EDIT')
+
+        for edit_bone in arma.data.edit_bones:
+            if edit_bone.parent:
+                bone_local = edit_bone.parent.matrix.inverted() @ edit_bone.matrix 
+            else:
+                bone_local = arma.matrix_local @ edit_bone.matrix
+
+            bone_bind_poses[edit_bone.name] = bone_local.inverted()
+
+        bpy.ops.object.mode_set(mode='OBJECT')
+
+
+        for bone in arma.pose.bones:
+            if to_crc(bone.name) in scene.animation.bone_frames:
+
+                bind_mat = bone_bind_poses[bone.name]
+
+                translation_frames, rotation_frames = scene.animation.bone_frames[to_crc(bone.name)]
+
+                loc_data_path = "pose.bones[\"{}\"].location".format(bone.name) 
+                rot_data_path = "pose.bones[\"{}\"].rotation_quaternion".format(bone.name) 
+
+
+                fcurve_rot_w = action.fcurves.new(rot_data_path, index=0, action_group=bone.name)
+                fcurve_rot_x = action.fcurves.new(rot_data_path, index=1, action_group=bone.name)
+                fcurve_rot_y = action.fcurves.new(rot_data_path, index=2, action_group=bone.name)
+                fcurve_rot_z = action.fcurves.new(rot_data_path, index=3, action_group=bone.name)
+
+                for frame in rotation_frames:
+                    i = frame.index
+                    q = (bind_mat @ convert_rotation_space(frame.rotation).to_matrix().to_4x4()).to_quaternion()
+
+                    fcurve_rot_w.keyframe_points.insert(i,q.w)
+                    fcurve_rot_x.keyframe_points.insert(i,q.x)
+                    fcurve_rot_y.keyframe_points.insert(i,q.y)
+                    fcurve_rot_z.keyframe_points.insert(i,q.z)
+
+                fcurve_loc_x = action.fcurves.new(loc_data_path, index=0, action_group=bone.name)
+                fcurve_loc_y = action.fcurves.new(loc_data_path, index=1, action_group=bone.name)
+                fcurve_loc_z = action.fcurves.new(loc_data_path, index=2, action_group=bone.name)
+
+                for frame in translation_frames:
+                    i = frame.index
+                    t = (bind_mat @ Matrix.Translation(convert_vector_space(frame.translation))).translation
+
+                    fcurve_loc_x.keyframe_points.insert(i,t.x)
+                    fcurve_loc_y.keyframe_points.insert(i,t.y)
+                    fcurve_loc_z.keyframe_points.insert(i,t.z)
+
+        arma.animation_data.action = action
+
+
+
+
+
+# Create the msh hierachy.  Armatures are not created here.  Much of this could use some optimization...
+def extract_models(scene: Scene, materials_map : Dict[str, bpy.types.Material]) -> Dict[str, bpy.types.Object]:
+
+    # This will be filled with model names -> Blender objects and returned
+    model_map : Dict[str, bpy.types.Object] = {}
+
+    sorted_models : List[Model] = sort_by_parent(scene.models)
+
+    for model in sorted_models:
+        new_obj = None
+
+
+        if model.model_type == ModelType.STATIC or model.model_type == ModelType.SKIN or model.model_type == ModelType.SHADOWVOLUME:  
+
+            new_mesh = bpy.data.meshes.new(model.name)
+            verts = []
+            faces = []
+            offset = 0
+
+            full_texcoords = []
+
+            weights_offsets = {}
+
+            face_range_to_material_index = []
+
+            if model.geometry:
+
+                #if model.collisionprimitive is None:
+                #    print(f"On model: {model.name}")
+
+                for i,seg in enumerate(model.geometry):
+
+                    verts += [tuple(convert_vector_space(v)) for v in seg.positions]
+
+                    #if model.collisionprimitive is None:
+                    #   print("Importing segment with material: {} with and {} verts".format(seg.material_name, len(seg.positions)))
+
+                    if seg.weights:
+                        weights_offsets[offset] = seg.weights
+
+                    if seg.texcoords is not None:
+                        full_texcoords += seg.texcoords
+                    else:
+                        full_texcoords += [(0.0,0.0) for _ in range(len(seg.positions))]
+
+                    face_range_lower = len(faces)
+
+                    if seg.triangles:
+                        faces += [tuple([ind + offset for ind in tri]) for tri in seg.triangles]
+                    else:
+                        for strip in seg.triangle_strips:
+                            for i in range(len(strip) - 2):
+                                face = tuple([offset + strip[j] for j in range(i,i+3)])
+                                faces.append(face)
+
+                    face_range_upper = len(faces)
+                    face_range_to_material_index.append((face_range_lower, face_range_upper, i))
+
+                    offset += len(seg.positions)
+
+            new_mesh.from_pydata(verts, [], faces)
+            new_mesh.update()
+            new_mesh.validate()
+
+
+            # If tex coords are present, add material and UV data
+            if full_texcoords:
+
+                edit_mesh = bmesh.new()
+                edit_mesh.from_mesh(new_mesh)
+
+                uvlayer = edit_mesh.loops.layers.uv.verify()
+
+                for edit_mesh_face in edit_mesh.faces:
+                    face_index = edit_mesh_face.index
+                    mesh_face = faces[face_index]
+
+                    for frL, frU, ind in face_range_to_material_index:
+                        if face_index >= frL and face_index < frU:
+                            edit_mesh_face.material_index = ind
+
+                    for i,loop in enumerate(edit_mesh_face.loops):
+
+                        texcoord = full_texcoords[mesh_face[i]]
+                        loop[uvlayer].uv = tuple([texcoord.x, texcoord.y])
+
+                edit_mesh.to_mesh(new_mesh)
+                edit_mesh.free()
+
+            
+            new_obj = bpy.data.objects.new(new_mesh.name, new_mesh)
+
+
+            vertex_groups_indicies = {}
+
+            for offset in weights_offsets:
+                for i, weight_set in enumerate(weights_offsets[offset]):
+                    for weight in weight_set:
+                        index = weight.bone
+
+                        if index not in vertex_groups_indicies:
+                            model_name = scene.models[index].name
+                            vertex_groups_indicies[index] = new_obj.vertex_groups.new(name=model_name)
+
+                        vertex_groups_indicies[index].add([offset + i], weight.weight, 'ADD')
+
+
+            '''
+            Assign Material slots
+            '''
+            if model.geometry:
+                for seg in model.geometry:
+                    if seg.material_name:
+                        material = materials_map[seg.material_name]
+                        new_obj.data.materials.append(material)
+        
+        else:
+
+            new_obj = bpy.data.objects.new(model.name, None)
+            new_obj.empty_display_size = 1
+            new_obj.empty_display_type = 'PLAIN_AXES' 
+
+
+        model_map[model.name] = new_obj
+
+        if model.parent:
+            new_obj.parent = model_map[model.parent]
+
+        new_obj.location = convert_vector_space(model.transform.translation)
+        new_obj.rotation_mode = "QUATERNION"
+        new_obj.rotation_quaternion = convert_rotation_space(model.transform.rotation)
+
+        if model.collisionprimitive is not None:
+            new_obj.swbf_msh_coll_prim.prim_type = model.collisionprimitive.shape.value
+
+        bpy.context.collection.objects.link(new_obj)
+
+
+    return model_map
+
+
+# TODO: Add to custom material info struct, maybe some material conversion/import?
+def extract_materials(folder_path: str, scene: Scene) -> Dict[str, bpy.types.Material]:
+
+    extracted_materials : Dict[str, bpy.types.Material] = {}
+
+    for material_name, material in scene.materials.items():
+
+        new_mat = bpy.data.materials.new(name=material_name)
+        new_mat.use_nodes = True
+        bsdf = new_mat.node_tree.nodes["Principled BSDF"]
+
+        diffuse_texture_path = find_texture_path(folder_path, material.texture0)
+
+        if diffuse_texture_path:
+            texImage = new_mat.node_tree.nodes.new('ShaderNodeTexImage')
+            texImage.image = bpy.data.images.load(diffuse_texture_path)
+            new_mat.node_tree.links.new(bsdf.inputs['Base Color'], texImage.outputs['Color'])  
+
+        fill_material_props(material, new_mat.swbf_msh_mat)      
+
+        extracted_materials[material_name] = new_mat
+
+    return extracted_materials
+
+
+
+def extract_scene(filepath: str, scene: Scene):
+
+    folder = os.path.join(os.path.dirname(filepath),"")
+
+    # material_map mapes Material names to Blender materials
+    material_map = extract_materials(folder, scene)
+
+    # model_map maps Model names to Blender objects.
+    model_map = extract_models(scene, material_map)
+
+
+    # skel contains all models needed in an armature
+    skel = extract_required_skeleton(scene)
+
+    # Create the armature if skel is non-empty
+    armature = None if not skel else required_skeleton_to_armature(skel, model_map, scene)
+
+    if armature is not None:
+        preserved_skel = armature.data.swbf_msh_skel
+        for model in scene.models:
+            if to_crc(model.name) in scene.skeleton or model.model_type == ModelType.BONE:
+                entry = preserved_skel.add()
+                entry.name = model.name
+
+
+    '''
+    If an armature was created, we need to do a few extra 
+    things to ensure the import makes sense in Blender.  It can
+    get a bit messy, as XSI + SWBF have very loose requirements  
+    when it comes to skin-skeleton parentage.
+
+    If not, we're good.
+    '''
+    if armature is not None:
+
+        has_skin = False
+
+        # Handle armature related parenting
+        for curr_model in scene.models:
+
+            curr_obj = model_map[curr_model.name]
+            
+            # Parent all skins to armature
+            if curr_model.model_type == ModelType.SKIN:
+
+                has_skin = True
+
+                curr_obj.parent = armature
+                curr_obj.parent_type = 'ARMATURE'
+
+            # Parent the object to a bone if necessary
+            else:
+                if curr_model.parent in armature.data.bones and curr_model.name not in armature.data.bones:
+                    # Not sure what the different mats do, but saving the worldmat and 
+                    # applying it after clearing the other mats yields correct results...
+                    worldmat = curr_obj.matrix_world
+
+                    curr_obj.parent = armature
+                    curr_obj.parent_type = 'BONE'
+                    curr_obj.parent_bone = curr_model.parent
+                    # ''
+                    curr_obj.matrix_basis = Matrix()
+                    curr_obj.matrix_parent_inverse = Matrix()
+                    curr_obj.matrix_world = worldmat
+
+        '''
+        Sometimes skins are parented to other skins.  We need to find the skin highest in the hierarchy and
+        parent all skins to its parent (armature_reparent_obj).
+
+        If not skin exists, we just reparent the armature to the parent of the highest node in the skeleton
+        '''
+        armature_reparent_obj = None
+        if has_skin:
+            for model in sort_by_parent(scene.models):
+                if model.model_type == ModelType.SKIN:
+                    armature_reparent_obj = None if not model.parent else model_map[model.parent]
+        else:
+            skeleton_parent_name = skel[0].parent
+            for model in scene.models:
+                if model.name == skeleton_parent_name:
+                    armature_reparent_obj = None if not skeleton_parent_name else model_map[skeleton_parent_name]
+
+        # Now we reparent the armature to the node (armature_reparent_obj) we just found
+        if armature_reparent_obj is not None and armature.name != armature_reparent_obj.name:
+            armature.parent = armature_reparent_obj
+
+
+        # If an bone exists in the armature, delete its 
+        # object counterpart (as created in extract_models)
+        for bone in skel:
+            model_to_remove = model_map[bone.name]
+            if model_to_remove:
+                bpy.data.objects.remove(model_to_remove, do_unlink=True)
+                model_map.pop(bone.name)
+    
+
+    # Lastly, hide all that is hidden in the msh scene
+    for model in scene.models:
+        if model.name in model_map:
+            obj = model_map[model.name]
+            if get_is_model_hidden(obj) and len(obj.children) == 0:
+                obj.hide_set(True)

addons/io_scene_swbf_msh/msh_utilities.py

@@ -1,6 +1,14 @@
 """ Misc utilities. """
 
 from mathutils import Vector
+from typing import List
+
+
+def vec_to_str(vec):
+    return "({:.4},{:.4},{:.4})".format(vec.x,vec.y,vec.z)
+
+def quat_to_str(quat):
+    return "({:.4},{:.4},{:.4},{:.4})".format(quat.w, quat.x, quat.y, quat.z)
 
 def add_vec(l: Vector, r: Vector) -> Vector:
     return Vector(v0 + v1 for v0, v1 in zip(l, r))
@@ -29,3 +37,14 @@ def pack_color(color) -> int:
     packed |= (int(color[3] * 255.0 + 0.5) << 24)
 
     return packed
+
+def unpack_color(color: int) -> List[float]:
+
+    mask = int(0x000000ff)
+
+    r = (color & (mask << 16)) / 255.0
+    g = (color & (mask << 8)) / 255.0
+    b = (color & mask) / 255.0
+    a = (color & (mask << 24)) / 255.0
+
+    return [r,g,b,a]

addons/io_scene_swbf_msh/zaa_to_blend.py

@@ -0,0 +1,433 @@
+"""
+Script for reading zaabin/zaa files and applying the unmunged animation
+to the currently selected armature.
+
+As regards decompress_curves, I should really make a separate AnimationSet
+dataclass instead of returning a convoluted nested dict.
+"""
+
+import os
+import bpy
+import re
+
+from .chunked_file_reader import Reader
+from .crc import *
+
+from .msh_model import *
+from .msh_model_utilities import *
+from .msh_utilities import *
+
+from typing import List, Set, Dict, Tuple
+
+
+debug = False
+
+
+                                      #anims  #bones   #components #keyframes: index,value
+def decompress_curves(input_file) -> Dict[int, Dict[int, List[ Dict[int,float]]]]:
+
+    global debug
+
+    decompressed_anims: Dict[int, Dict[int, List[ Dict[int,float]]]] = {}
+
+    with Reader(input_file, debug=debug) as head:
+
+        # Dont read SMNA as child, since it has a length field always set to 0...
+        head.skip_until("SMNA")
+        head.skip_bytes(20)
+        num_anims = head.read_u16()
+
+        if debug:
+            print("\nFile contains {} animations\n".format(num_anims))
+
+        head.skip_bytes(2)
+
+        anim_crcs = []
+        anim_metadata = {}
+
+        head.skip_until("MINA")
+
+        # Read metadata (crc, num frames, num bones) for each anim
+        with head.read_child() as mina:
+
+            for i in range(num_anims):
+
+                transBitFlags = mina.read_u32()
+                mina.skip_bytes(4)
+
+                anim_crc = mina.read_u32() 
+                anim_crcs.append(anim_crc)
+
+                anim_metadata[anim_crc] = {
+                    "num_frames" : mina.read_u16(),
+                    "num_bones" : mina.read_u16(),
+                    "transBitFlags" : transBitFlags,
+                }
+
+
+        head.skip_until("TNJA")
+
+        # Read TADA offsets and quantization parameters for each rot + loc component, for each bone, for each anim
+        with head.read_child() as tnja:
+
+            for i, anim_crc in enumerate(anim_crcs):
+
+                bone_params = {}
+                bone_list = []
+
+                for _ in range(anim_metadata[anim_crc]["num_bones"]):
+
+                    bone_crc = tnja.read_u32()
+
+                    bone_list.append(bone_crc)              
+
+                    bone_params[bone_crc] = {
+                        "rot_offsets" : [tnja.read_u32() for _ in range(4)], # Offsets into TADA for rotation 
+                        "loc_offsets" : [tnja.read_u32() for _ in range(3)], # and translation curves
+                        "qparams"     : [tnja.read_f32() for _ in range(4)], # Translation quantization parameters, 3 biases, 1 multiplier
+                    }
+
+                anim_metadata[anim_crc]["bone_params"] = bone_params
+                anim_metadata[anim_crc]["bone_list"] = bone_list
+
+        head.skip_until("TADA")
+
+        # Decompress/dequantize frame data into discrete per-component curves
+        with head.read_child() as tada:
+
+            for anim_crc in anim_crcs:
+
+                decompressed_anims[anim_crc] = {}
+
+                num_frames = anim_metadata[anim_crc]["num_frames"]
+                num_bones = anim_metadata[anim_crc]["num_bones"]
+
+                transBitFlags = anim_metadata[anim_crc]["transBitFlags"]
+
+                if debug:
+                    print("\n\tAnim hash: {} Num frames: {} Num joints: {}".format(hex(anim_crc), num_frames, num_bones))
+
+                for bone_num, bone_crc in enumerate(anim_metadata[anim_crc]["bone_list"]):
+
+                    bone_curves = []
+
+                    params_bone = anim_metadata[anim_crc]["bone_params"][bone_crc]
+                    
+                    offsets_list = params_bone["rot_offsets"] + params_bone["loc_offsets"]
+                    qparams = params_bone["qparams"]
+
+                    if debug:
+                        print("\n\t\tBone #{} hash: {}".format(bone_num,hex(bone_crc)))
+                        print("\n\t\tQParams: {}, {}, {}, {}".format(*qparams))
+                    
+                    for o, start_offset in enumerate(offsets_list):
+                        
+                        # Init curve dict
+                        curve : Dict[int,float] = {}
+
+                        # Init accumulator
+                        accumulator = 0.0
+
+
+                        # 2047 = max val of signed 12 bit int, the (overwhelmingly) common compression amount.
+                        # This is used for all rotation components in the file, with no offset
+                        if o < 4:
+                            mult = 1 / 2047
+                            bias = 0.0
+
+                        # Translations have specific quantization parameters; biases for each component and 
+                        # a single multiplier for all three
+                        else:
+
+                            mult = qparams[-1]
+                            bias = qparams[o - 4]
+
+                            if debug:
+                                print("\n\t\t\tBias = {}, multiplier = {}".format(bias, mult))
+
+                        if debug:
+                            print("\n\t\t\tOffset {}: {} ({}, {} remaining)".format(o,start_offset, tada.get_current_pos(), tada.how_much_left(tada.get_current_pos())))
+
+                        # Skip to start of compressed data for component, as specified in TNJA
+                        tada.skip_bytes(start_offset)
+                        
+
+                        j = 0
+                        while (j < num_frames):
+                            accumulator = bias + mult * tada.read_i16()
+                            curve[j if j < num_frames else num_frames] = accumulator
+
+                            if debug:
+                                print("\t\t\t\t{}: {}".format(j, accumulator))
+
+                            j+=1
+
+                            while (j < num_frames):
+
+                                control = tada.read_i8()
+
+                                # Reset the accumulator to next dequantized i16
+                                if control == -0x7f:
+                                    if debug:
+                                        print("\t\t\t\tControl: READING NEXT FRAME")
+                                    break
+
+                                # RLE: hold current accumulator for the next u8 frames 
+                                elif control == -0x80:
+                                    num_skips = tada.read_u8()
+                                    if debug:
+                                        print("\t\t\t\tControl: HOLDING FOR {} FRAMES".format(num_skips))
+                                    j += num_skips
+
+                                # If not a special value, increment accumulator by the dequantized i8
+                                # The bias is NOT applied here, only for accumulator resets
+                                else:
+                                    accumulator += mult * float(control) 
+                                    curve[j if j < num_frames else num_frames] = accumulator
+                                    if debug:
+                                        print("\t\t\t\t{}: {}".format(j, accumulator))
+                                    j+=1 
+
+                        curve[num_frames - 1] = accumulator                          
+
+                        tada.reset_pos() 
+
+                        bone_curves.append(curve)
+
+                    decompressed_anims[anim_crc][bone_crc] = bone_curves
+
+    return decompressed_anims
+
+
+'''
+Gets the animation names from the supplied
+.anims file. Handy since .zaabin files often
+share a dir with a .anims file.
+'''
+
+def read_anims_file(anims_file_path):
+
+    if not os.path.exists(anims_file_path):
+        return []
+
+    with open(anims_file_path, 'r') as file:
+        anims_text = file.read()
+
+    splits = anims_text.split('"')
+
+    if len(splits) > 1:
+        return splits[1:-1:2]
+
+    return []
+
+
+
+'''
+Unmunge the .zaa(bin) file and apply the resulting animation
+to the currently selected armature object.
+
+Contains some bloated code for calculating the world transforms of each bone,
+for now this will work ONLY if the model was directly imported from a .msh file.
+'''
+
+def extract_and_apply_munged_anim(input_file_path):
+
+    global debug
+
+    with open(input_file_path,"rb") as input_file:
+        animation_set = decompress_curves(input_file)
+
+    anim_names = []
+    if input_file_path.endswith(".zaabin"):
+        anim_names = read_anims_file(input_file_path.replace(".zaabin", ".anims"))
+
+    arma = bpy.context.view_layer.objects.active
+    if arma.type != 'ARMATURE':
+        raise Exception("Select an armature to attach the imported animation to!")
+    
+    if arma.animation_data is not None:
+        arma.animation_data_clear()
+    arma.animation_data_create()
+
+
+
+    """
+    When directly imported from .msh files,
+    all skeleton models are saved as emptys, since
+    some are excluded from the actual armature (effectors, roots, eg...).
+
+    bond_bind_poses contains matrices for converting the transform of 
+    bones found in .msh/.zaabin files to ones that'll fit the extracted armature.
+    This will be replaced with the eventual importer release.
+    """
+
+    animated_bones = set()
+    for anim_crc in animation_set:
+        for bone_crc in animation_set[anim_crc]:
+            animated_bones.add(bone_crc)
+
+
+    bpy.context.view_layer.objects.active = arma
+    bpy.ops.object.mode_set(mode='EDIT')
+
+    bone_bind_poses = {}
+
+    for edit_bone in arma.data.edit_bones:
+        if to_crc(edit_bone.name) not in animated_bones:
+            continue
+
+        curr_ancestor = edit_bone.parent
+        while curr_ancestor is not None and to_crc(curr_ancestor.name) not in animated_bones:
+            curr_ancestor = curr_ancestor.parent
+
+        if curr_ancestor:
+            bind_mat = curr_ancestor.matrix.inverted() @ edit_bone.matrix 
+        else:
+            bind_mat = arma.matrix_local @ edit_bone.matrix
+
+        bone_bind_poses[edit_bone.name] = bind_mat.inverted()
+
+    bpy.ops.object.mode_set(mode='OBJECT')
+
+
+    if debug:
+        print("Extracting {} animations from {}:".format(len(animation_set), input_file_path))
+
+    for anim_crc in animation_set:
+
+        found_anim = [anim_name for anim_name in anim_names if to_crc(anim_name) == anim_crc]
+        if found_anim:
+            anim_str = found_anim[0]
+        else:
+            anim_str = str(hex(anim_crc)) 
+
+        if debug:
+            print("\tExtracting anim {}:".format(anim_str))
+
+
+        #if anim_str in bpy.data.actions:
+        #    bpy.data.actions[anim_str].use_fake_user = False
+        #    bpy.data.actions.remove(bpy.data.actions[anim_str])
+
+        action = bpy.data.actions.new(anim_str)
+        action.use_fake_user = True
+
+        animation = animation_set[anim_crc]
+
+        bone_crcs_list = [bone_crc_ for bone_crc_ in animation]
+
+        for bone_crc in sorted(bone_crcs_list):
+
+            bone_name = next((bone.name for bone in arma.pose.bones if to_crc(bone.name) == bone_crc), None)
+
+            if bone_name is None:
+                continue
+
+            bone = arma.pose.bones[bone_name]
+
+            bone_crc = to_crc(bone.name)
+
+            if bone_crc not in animation:
+                continue;
+
+            bind_mat = bone_bind_poses[bone.name]
+            loc_data_path = "pose.bones[\"{}\"].location".format(bone.name) 
+            rot_data_path = "pose.bones[\"{}\"].rotation_quaternion".format(bone.name) 
+
+            bone_curves = animation[bone_crc]
+            num_frames = max(bone_curves[0])
+
+            has_translation = bone_curves[4] is not None
+
+            if debug:
+                print("\t\tBone {} has {} frames: ".format(bone_name, num_frames))
+
+            last_values = [1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
+
+            def get_quat(index):
+                nonlocal bone_curves, last_values
+
+                q = Quaternion()
+                valmap = [1,2,3,0]
+
+                has_key = False
+
+                for i in range(4):
+                    curve = bone_curves[i]
+                    if index in curve:
+                        has_key = True
+                        last_values[i] = curve[index]
+                    q[valmap[i]] = last_values[i]
+
+                return q if has_key else None
+
+            def get_vec(index):
+                nonlocal bone_curves, last_values
+                
+                v = Vector()
+                has_key = False
+
+                for i in range(4,7):
+                    curve = bone_curves[i]
+                    if index in curve:
+                        has_key = True
+                        last_values[i] = curve[index]
+                    v[i - 4] = last_values[i]
+
+                return v if has_key else None
+
+            fcurve_rot_w = action.fcurves.new(rot_data_path, index=0, action_group=bone.name)
+            fcurve_rot_x = action.fcurves.new(rot_data_path, index=1, action_group=bone.name)
+            fcurve_rot_y = action.fcurves.new(rot_data_path, index=2, action_group=bone.name)
+            fcurve_rot_z = action.fcurves.new(rot_data_path, index=3, action_group=bone.name)
+
+            if has_translation:
+                fcurve_loc_x = action.fcurves.new(loc_data_path, index=0, action_group=bone.name)
+                fcurve_loc_y = action.fcurves.new(loc_data_path, index=1, action_group=bone.name)
+                fcurve_loc_z = action.fcurves.new(loc_data_path, index=2, action_group=bone.name)
+
+            for frame in range(num_frames):
+
+                q = get_quat(frame)
+                if q is not None:
+
+                    if debug:
+                        print("\t\t\tRot key: ({}, {})".format(frame, quat_to_str(q)))
+
+                    # Very bloated, but works for now
+                    q = (bind_mat @ convert_rotation_space(q).to_matrix().to_4x4()).to_quaternion()
+                    fcurve_rot_w.keyframe_points.insert(frame,q.w)
+                    fcurve_rot_x.keyframe_points.insert(frame,q.x)
+                    fcurve_rot_y.keyframe_points.insert(frame,q.y)
+                    fcurve_rot_z.keyframe_points.insert(frame,q.z)
+
+                if has_translation:
+                    
+                    t = get_vec(frame)
+                    if t is not None:
+
+                        if debug:
+                            print("\t\t\tPos key: ({}, {})".format(frame, vec_to_str(t)))
+
+                        t = (bind_mat @ Matrix.Translation(convert_vector_space(t))).translation
+
+                        fcurve_loc_x.keyframe_points.insert(frame,t.x)
+                        fcurve_loc_y.keyframe_points.insert(frame,t.y)
+                        fcurve_loc_z.keyframe_points.insert(frame,t.z)
+
+        arma.animation_data.action = action
+
+
+
+
+
+
+       
+
+
+
+
+
+
+
+