263 lines
8.0 KiB
Python
263 lines
8.0 KiB
Python
""" Contains functions for extracting a scene from a .msh file"""
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from itertools import islice
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from typing import Dict
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from .msh_scene import Scene
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from .msh_model import *
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from .msh_material import *
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from .msh_reader import Reader
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from .msh_utilities import *
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from .crc import *
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def read_scene(input_file) -> Scene:
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scene = Scene()
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scene.models = []
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scene.materials = {}
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with Reader(file=input_file, chunk_id="HEDR") as hedr:
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while hedr.could_have_child():
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next_header = hedr.peak_next_header()
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if "MSH2" in next_header:
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with hedr.read_child("MSH2") as msh2:
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materials_list = []
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while (msh2.could_have_child()):
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next_header = msh2.peak_next_header()
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if "SINF" in next_header:
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with msh2.read_child("SINF") as sinf:
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pass
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elif "MATL" in next_header:
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with msh2.read_child("MATL") as matl:
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materials_list += _read_matl_and_get_materials_list(matl)
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for i,mat in enumerate(materials_list):
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scene.materials[mat.name] = mat
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elif "MODL" in next_header:
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while ("MODL" in msh2.peak_next_header()):
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with msh2.read_child("MODL") as modl:
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scene.models.append(_read_modl(modl, materials_list))
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else:
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with hedr.read_child("NULL") as unknown:
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pass
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else:
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with hedr.read_child("NULL") as unknown:
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pass
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return scene
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def _read_matl_and_get_materials_list(matl: Reader) -> List[Material]:
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materials_list: List[Material] = []
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num_mats = matl.read_u32()
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for _ in range(num_mats):
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with matl.read_child("MATD") as matd:
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materials_list.append(_read_matd(matd))
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return materials_list
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def _read_matd(matd: Reader) -> Material:
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mat = Material()
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while matd.could_have_child():
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next_header = matd.peak_next_header()
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if "NAME" in next_header:
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with matd.read_child("NAME") as name:
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mat.name = name.read_string()
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elif "DATA" in next_header:
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with matd.read_child("DATA") as data:
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data.read_f32(4) # Diffuse Color (Seams to get ignored by modelmunge)
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mat.specular_color = data.read_f32(4)
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data.read_f32(4) # Ambient Color (Seams to get ignored by modelmunge and Zero(?))
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data.read_f32() # Specular Exponent/Decay (Gets ignored by RedEngine in SWBFII for all known materials)
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elif "ATRB" in next_header:
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with matd.read_child("ATRB") as atrb:
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mat.flags = atrb.read_u8()
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mat.rendertype = atrb.read_u8()
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mat.data = atrb.read_u8(2)
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elif "TX0D" in next_header:
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with matd.read_child("TX0D") as tx0d:
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mat.texture0 = tx0d.read_string()
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elif "TX1D" in next_header:
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with matd.read_child("TX1D") as tx1d:
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mat.texture1 = tx1d.read_string()
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elif "TX2D" in next_header:
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with matd.read_child("TX2D") as tx2d:
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mat.texture2 = tx2d.read_string()
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elif "TX3D" in next_header:
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with matd.read_child("TX3D") as tx3d:
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mat.texture3 = tx3d.read_string()
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else:
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matd.skip_bytes(4)
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return mat
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def _read_modl(modl: Reader, materials_list: List[Material]) -> Model:
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model = Model()
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while modl.could_have_child():
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next_header = modl.peak_next_header()
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if "MTYP" in next_header:
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with modl.read_child("MTYP") as mtyp:
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model.model_type = ModelType(mtyp.read_u32())
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elif "MNDX" in next_header:
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with modl.read_child("MNDX") as mndx:
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pass
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elif "NAME" in next_header:
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with modl.read_child("NAME") as name:
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model.name = name.read_string()
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elif "PRNT" in next_header:
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with modl.read_child("PRNT") as prnt:
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model.parent = prnt.read_string()
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elif "FLGS" in next_header:
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with modl.read_child("FLGS") as flgs:
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model.hidden = flgs.read_u32()
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elif "TRAN" in next_header:
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with modl.read_child("TRAN") as tran:
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model.transform = _read_tran(tran)
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elif "GEOM" in next_header:
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model.geometry = []
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with modl.read_child("GEOM") as geom:
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next_header_modl = geom.peak_next_header()
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if "SEGM" in next_header_modl:
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with geom.read_child("SEGM") as segm:
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model.geometry.append(_read_segm(segm, materials_list))
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elif "SWCI" in next_header:
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prim = CollisionPrimitive()
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with modl.read_child("SWCI") as swci:
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prim.shape.value = swci.read_u32()
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prim.radius = swci.read_f32()
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prim.height = swci.read_f32()
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prim.length = swci.read_f32()
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model.collisionprimitive = prim
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else:
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with modl.read_child("NULL") as unknown:
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pass
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return model
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def _read_tran(tran: Reader) -> ModelTransform:
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xform = ModelTransform()
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tran.skip_bytes(4 * 3) #ignore scale
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rot = tran.read_f32(4)
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xform.rotation = Quaternion((rot[3], rot[0], rot[1], rot[2]))
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xform.translation = Vector(tran.read_f32(3))
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return xform
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def _read_segm(segm: Reader, materials_list: List[Material]) -> GeometrySegment:
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geometry_seg = GeometrySegment()
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while segm.could_have_child():
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next_header = segm.peak_next_header()
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if "MATI" in next_header:
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with segm.read_child("MATI") as mati:
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geometry_seg.material_name = materials_list[mati.read_u32()].name
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elif "POSL" in next_header:
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with segm.read_child("POSL") as posl:
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num_positions = posl.read_u32()
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for _ in range(num_positions):
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geometry_seg.positions.append(Vector(posl.read_f32(3)))
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elif "NRML" in next_header:
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with segm.read_child("NRML") as nrml:
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num_normals = nrml.read_u32()
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for _ in range(num_positions):
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geometry_seg.normals.append(Vector(nrml.read_f32(3)))
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elif "CLRL" in next_header:
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geometry_seg.colors = []
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with segm.read_child("CLRL") as clrl:
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num_colors = clrl.read_u32()
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for _ in range(num_colors):
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geometry_seg.colors += unpack_color(clrl.read_u32())
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elif "UV0L" in next_header:
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with segm.read_child("UV0L") as uv0l:
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num_texcoords = uv0l.read_u32()
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for _ in range(num_texcoords):
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geometry_seg.texcoords.append(Vector(uv0l.read_f32(2)))
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elif "NDXL" in next_header:
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with segm.read_child("NDXL") as ndxl:
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num_polygons = ndxl.read_u32()
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for _ in range(num_polygons):
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polygon = ndxl.read_u16(ndxl.read_u16())
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geometry_seg.polygons.append(polygon)
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elif "NDXT" in next_header:
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with segm.read_child("NDXT") as ndxt:
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num_tris = ndxt.read_u32()
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for _ in range(num_tris):
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geometry_seg.triangles.append(ndxt.read_u16(3))
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elif "STRP" in next_header:
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with segm.read_child("STRP") as strp:
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pass
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if segm.read_u16 != 0: #trailing 0 bug https://schlechtwetterfront.github.io/ze_filetypes/msh.html#STRP
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segm.skip_bytes(-2)
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else:
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with segm.read_child("NULL") as unknown:
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pass
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return geometry_seg
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