Fix T41316: FBX exporter in Blender cause artifacts to appear on meshes with Shape Keys.
For some reason, Unity (and FBX SDK in general?) does not support well mixing normals and smooth data, at least when using shapekeys. Odd, odd, you said odd? That's odd... Anyway, we do not really need both of those data at the same time, so for now either write smooth or normals data, not both!
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blender-bot
2023-02-14 10:15:23 +01:00
Referenced by issue blender/blender#41316, FBX exporter in Blender cause artifacts to appear on meshes with Shape Keys
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@ -246,13 +246,13 @@ class ExportFBX(bpy.types.Operator, ExportHelper):
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)
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mesh_smooth_type = EnumProperty(
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name="Smoothing",
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items=(('OFF', "Off", "Don't write smoothing"),
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items=(('OFF', "Off", "Don't write smoothing, export normals instead"),
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('FACE', "Face", "Write face smoothing"),
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('EDGE', "Edge", "Write edge smoothing"),
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),
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description=("Export smoothing information "
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"(not mandatory if your target importer understand split normals)"),
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default='FACE',
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"(prefer 'Off' option if your target importer understand split normals)"),
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default='OFF',
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)
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use_mesh_edges = BoolProperty(
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name="Loose Edges",
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@ -380,7 +380,9 @@ class ExportFBX(bpy.types.Operator, ExportHelper):
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layout.prop(self, "use_mesh_modifiers")
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layout.prop(self, "mesh_smooth_type")
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layout.prop(self, "use_mesh_edges")
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layout.prop(self, "use_tspace")
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sub = layout.row()
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sub.enabled = self.mesh_smooth_type in {'OFF'}
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sub.prop(self, "use_tspace")
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layout.prop(self, "use_armature_deform_only")
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if is_74bin:
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layout.prop(self, "use_custom_props")
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@ -808,6 +808,7 @@ def fbx_data_mesh_elements(root, me_obj, scene_data, done_meshes):
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# No gscale/gmat here, all data are supposed to be in object space.
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smooth_type = scene_data.settings.mesh_smooth_type
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write_normals = smooth_type in {'OFF'}
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do_bake_space_transform = me_obj.use_bake_space_transform(scene_data)
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@ -944,93 +945,94 @@ def fbx_data_mesh_elements(root, me_obj, scene_data, done_meshes):
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del edges_map
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# Loop normals.
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# NOTE: this is not supported by importer currently.
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# XXX Official docs says normals should use IndexToDirect,
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# but this does not seem well supported by apps currently...
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me.calc_normals_split()
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if (write_normals):
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# NOTE: this is not supported by importer currently.
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# XXX Official docs says normals should use IndexToDirect,
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# but this does not seem well supported by apps currently...
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me.calc_normals_split()
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def _nortuples_gen(raw_nors, m):
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# Great, now normals are also expected 4D!
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# XXX Back to 3D normals for now!
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# gen = zip(*(iter(raw_nors),) * 3 + (_infinite_gen(1.0),))
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gen = zip(*(iter(raw_nors),) * 3)
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return gen if m is None else (m * Vector(v) for v in gen)
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def _nortuples_gen(raw_nors, m):
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# Great, now normals are also expected 4D!
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# XXX Back to 3D normals for now!
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# gen = zip(*(iter(raw_nors),) * 3 + (_infinite_gen(1.0),))
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gen = zip(*(iter(raw_nors),) * 3)
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return gen if m is None else (m * Vector(v) for v in gen)
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t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops) * 3
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me.loops.foreach_get("normal", t_ln)
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t_ln = _nortuples_gen(t_ln, geom_mat_no)
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if 0:
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t_ln = tuple(t_ln) # No choice... :/
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t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops) * 3
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me.loops.foreach_get("normal", t_ln)
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t_ln = _nortuples_gen(t_ln, geom_mat_no)
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if 0:
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t_ln = tuple(t_ln) # No choice... :/
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lay_nor = elem_data_single_int32(geom, b"LayerElementNormal", 0)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_NORMAL_VERSION)
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elem_data_single_string(lay_nor, b"Name", b"")
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"IndexToDirect")
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lay_nor = elem_data_single_int32(geom, b"LayerElementNormal", 0)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_NORMAL_VERSION)
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elem_data_single_string(lay_nor, b"Name", b"")
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"IndexToDirect")
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ln2idx = tuple(set(t_ln))
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elem_data_single_float64_array(lay_nor, b"Normals", chain(*ln2idx))
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# Normal weights, no idea what it is.
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# t_lnw = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(ln2idx)
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# elem_data_single_float64_array(lay_nor, b"NormalsW", t_lnw)
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ln2idx = tuple(set(t_ln))
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elem_data_single_float64_array(lay_nor, b"Normals", chain(*ln2idx))
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# Normal weights, no idea what it is.
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# t_lnw = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(ln2idx)
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# elem_data_single_float64_array(lay_nor, b"NormalsW", t_lnw)
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ln2idx = {nor: idx for idx, nor in enumerate(ln2idx)}
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elem_data_single_int32_array(lay_nor, b"NormalsIndex", (ln2idx[n] for n in t_ln))
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ln2idx = {nor: idx for idx, nor in enumerate(ln2idx)}
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elem_data_single_int32_array(lay_nor, b"NormalsIndex", (ln2idx[n] for n in t_ln))
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del ln2idx
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# del t_lnw
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else:
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lay_nor = elem_data_single_int32(geom, b"LayerElementNormal", 0)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_NORMAL_VERSION)
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elem_data_single_string(lay_nor, b"Name", b"")
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Normals", chain(*t_ln))
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# Normal weights, no idea what it is.
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# t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops)
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# elem_data_single_float64_array(lay_nor, b"NormalsW", t_ln)
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del t_ln
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# tspace
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tspacenumber = 0
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if scene_data.settings.use_tspace:
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tspacenumber = len(me.uv_layers)
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if tspacenumber:
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t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops) * 3
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# t_lnw = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops)
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for idx, uvlayer in enumerate(me.uv_layers):
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name = uvlayer.name
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me.calc_tangents(name)
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# Loop bitangents (aka binormals).
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# NOTE: this is not supported by importer currently.
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me.loops.foreach_get("bitangent", t_ln)
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lay_nor = elem_data_single_int32(geom, b"LayerElementBinormal", idx)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_BINORMAL_VERSION)
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elem_data_single_string_unicode(lay_nor, b"Name", name)
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Binormals", chain(*_nortuples_gen(t_ln, geom_mat_no)))
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# Binormal weights, no idea what it is.
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# elem_data_single_float64_array(lay_nor, b"BinormalsW", t_lnw)
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# Loop tangents.
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# NOTE: this is not supported by importer currently.
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me.loops.foreach_get("tangent", t_ln)
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lay_nor = elem_data_single_int32(geom, b"LayerElementTangent", idx)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_TANGENT_VERSION)
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elem_data_single_string_unicode(lay_nor, b"Name", name)
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Tangents", chain(*_nortuples_gen(t_ln, geom_mat_no)))
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# Tangent weights, no idea what it is.
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# elem_data_single_float64_array(lay_nor, b"TangentsW", t_lnw)
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del t_ln
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del ln2idx
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# del t_lnw
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me.free_tangents()
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else:
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lay_nor = elem_data_single_int32(geom, b"LayerElementNormal", 0)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_NORMAL_VERSION)
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elem_data_single_string(lay_nor, b"Name", b"")
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Normals", chain(*t_ln))
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# Normal weights, no idea what it is.
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# t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops)
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# elem_data_single_float64_array(lay_nor, b"NormalsW", t_ln)
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del t_ln
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me.free_normals_split()
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del _nortuples_gen
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# tspace
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tspacenumber = 0
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if scene_data.settings.use_tspace:
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tspacenumber = len(me.uv_layers)
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if tspacenumber:
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t_ln = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops) * 3
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# t_lnw = array.array(data_types.ARRAY_FLOAT64, (0.0,)) * len(me.loops)
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for idx, uvlayer in enumerate(me.uv_layers):
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name = uvlayer.name
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me.calc_tangents(name)
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# Loop bitangents (aka binormals).
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# NOTE: this is not supported by importer currently.
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me.loops.foreach_get("bitangent", t_ln)
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lay_nor = elem_data_single_int32(geom, b"LayerElementBinormal", idx)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_BINORMAL_VERSION)
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elem_data_single_string_unicode(lay_nor, b"Name", name)
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Binormals", chain(*_nortuples_gen(t_ln, geom_mat_no)))
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# Binormal weights, no idea what it is.
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# elem_data_single_float64_array(lay_nor, b"BinormalsW", t_lnw)
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# Loop tangents.
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# NOTE: this is not supported by importer currently.
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me.loops.foreach_get("tangent", t_ln)
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lay_nor = elem_data_single_int32(geom, b"LayerElementTangent", idx)
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elem_data_single_int32(lay_nor, b"Version", FBX_GEOMETRY_TANGENT_VERSION)
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elem_data_single_string_unicode(lay_nor, b"Name", name)
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elem_data_single_string(lay_nor, b"MappingInformationType", b"ByPolygonVertex")
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elem_data_single_string(lay_nor, b"ReferenceInformationType", b"Direct")
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elem_data_single_float64_array(lay_nor, b"Tangents", chain(*_nortuples_gen(t_ln, geom_mat_no)))
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# Tangent weights, no idea what it is.
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# elem_data_single_float64_array(lay_nor, b"TangentsW", t_lnw)
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del t_ln
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# del t_lnw
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me.free_tangents()
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me.free_normals_split()
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del _nortuples_gen
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# Write VertexColor Layers.
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vcolnumber = len(me.vertex_colors)
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