SWBF-msh-Blender-IO/addons/io_scene_swbf_msh/msh_scene_save.py

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""" Contains functions for saving a Scene to a .msh file. """
from itertools import islice
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from typing import Dict
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from .msh_scene import Scene, create_scene_aabb
from .msh_model import *
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from .msh_material import *
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from .msh_writer import Writer
from .msh_utilities import *
def save_scene(output_file, scene: Scene):
""" Saves scene to the supplied file. """
with Writer(file=output_file, chunk_id="HEDR") as hedr:
with hedr.create_child("MSH2") as msh2:
with msh2.create_child("SINF") as sinf:
_write_sinf(sinf, scene)
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material_index: Dict[str, int] = {}
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with msh2.create_child("MATL") as matl:
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material_index = _write_matl_and_get_material_index(matl, scene)
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for index, model in enumerate(scene.models):
with msh2.create_child("MODL") as modl:
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_write_modl(modl, model, index, material_index)
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with hedr.create_child("CL1L"):
pass
def _write_sinf(sinf: Writer, scene: Scene):
with sinf.create_child("NAME") as name:
name.write_string(scene.name)
with sinf.create_child("FRAM") as fram:
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fram.write_i32(0, 1)
fram.write_f32(29.97003)
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with sinf.create_child("BBOX") as bbox:
aabb = create_scene_aabb(scene)
bbox_position = div_vec(add_vec(aabb.min_, aabb.max_), Vector((2.0, 2.0, 2.0)))
bbox_size = div_vec(sub_vec(aabb.max_, aabb.min_), Vector((2.0, 2.0, 2.0)))
bbox_length = bbox_size.length
bbox.write_f32(0.0, 0.0, 0.0, 1.0)
bbox.write_f32(bbox_position.x, bbox_position.y, bbox_position.z)
bbox.write_f32(bbox_size.x, bbox_size.y, bbox_size.z, bbox_length)
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def _write_matl_and_get_material_index(matl: Writer, scene: Scene):
material_index: Dict[str, int] = {}
if len(scene.materials) > 0:
matl.write_u32(len(scene.materials)) # Material count.
for index, name_material in enumerate(scene.materials.items()):
with matl.create_child("MATD") as matd:
material_index[name_material[0]] = index
_write_matd(matd, name_material[0], name_material[1])
else:
matl.write_u32(1) # Material count.
default_material_name = f"{scene.name}Material"
material_index[default_material_name] = 0
with matl.create_child("MATD") as matd:
_write_matd(matd, default_material_name, Material())
return material_index
def _write_matd(matd: Writer, material_name: str, material: Material):
with matd.create_child("NAME") as name:
name.write_string(material_name)
with matd.create_child("DATA") as data:
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(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)
atrb.write_u8(material.rendertype.value)
atrb.write_u8(material.data[0], material.data[1])
with matd.create_child("TX0D") as tx0d:
tx0d.write_string(material.texture0)
if material.texture1 or material.texture2 or material.texture3:
with matd.create_child("TX1D") as tx1d:
tx1d.write_string(material.texture1)
if material.texture2 or material.texture3:
with matd.create_child("TX2D") as tx2d:
tx2d.write_string(material.texture2)
if material.texture3:
with matd.create_child("TX3D") as tx3d:
tx3d.write_string(material.texture3)
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def _write_modl(modl: Writer, model: Model, index: int, material_index: Dict[str, int]):
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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)
with modl.create_child("NAME") as name:
name.write_string(model.name)
if model.parent:
with modl.create_child("PRNT") as prnt:
prnt.write_string(model.parent)
if model.hidden:
with modl.create_child("FLGS") as flgs:
flgs.write_u32(1)
with modl.create_child("TRAN") as tran:
_write_tran(tran, model.transform)
if model.geometry is not None:
with modl.create_child("GEOM") as geom:
for segment in model.geometry:
with geom.create_child("SEGM") as segm:
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_write_segm(segm, segment, material_index)
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if model.collisionprimitive is not None:
with modl.create_child("SWCI") as swci:
swci.write_u32(model.collisionprimitive.shape.value)
swci.write_f32(model.collisionprimitive.radius)
swci.write_f32(model.collisionprimitive.height)
swci.write_f32(model.collisionprimitive.length)
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def _write_tran(tran: Writer, transform: ModelTransform):
tran.write_f32(1.0, 1.0, 1.0) # Scale, ignored by modelmunge
tran.write_f32(transform.rotation.x, transform.rotation.y, transform.rotation.z, transform.rotation.w)
tran.write_f32(transform.translation.x, transform.translation.y, transform.translation.z)
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def _write_segm(segm: Writer, segment: GeometrySegment, material_index: Dict[str, int]):
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with segm.create_child("MATI") as mati:
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mati.write_u32(material_index.get(segment.material_name, 0))
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with segm.create_child("POSL") as posl:
posl.write_u32(len(segment.positions))
for position in segment.positions:
posl.write_f32(position.x, position.y, position.z)
with segm.create_child("NRML") as nrml:
nrml.write_u32(len(segment.normals))
for normal in segment.normals:
nrml.write_f32(normal.x, normal.y, normal.z)
if segment.colors is not None:
with segm.create_child("CLRL") as clrl:
clrl.write_u32(len(segment.colors))
for color in segment.colors:
clrl.write_u32(pack_color(color))
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)
with segm.create_child("NDXL") as ndxl:
ndxl.write_u32(len(segment.polygons))
for polygon in segment.polygons:
ndxl.write_u16(len(polygon))
for index in polygon:
ndxl.write_u16(index)
with segm.create_child("NDXT") as ndxt:
ndxt.write_u32(len(segment.triangles))
for triangle in segment.triangles:
ndxt.write_u16(triangle[0], triangle[1], triangle[2])
with segm.create_child("STRP") as strp:
strp.write_u32(sum(len(strip) for strip in segment.triangle_strips))
for strip in segment.triangle_strips:
strp.write_u16(strip[0] | 0x8000, strip[1] | 0x8000)
for index in islice(strip, 2, len(strip)):
strp.write_u16(index)