yyc12345/BallanceBlenderHelper
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[fix] fix empty material slot export error.

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- fix the issue that the object with empty material slot will cause a None crash when exporting BM file.
This commit is contained in:
yyc12345 2023-05-25 20:54:50 +08:00
parent dafb679780
commit c2a85a2d86
1 changed files with 9 additions and 2 deletions
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11
ballance_blender_plugin/BMFILE_export.py
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@ -202,6 +202,10 @@ def export_bm(context, bmx_filepath, prefs_fncg, opts_exportMode, opts_exportTar
mesh_usedBlenderMtl = mesh.materials[:]
mesh_noMaterial = len(mesh_usedBlenderMtl) == 0
for mat in mesh_usedBlenderMtl:
# skip empty mtl slot
if mat is None:
continue
# add into mtl set
if mat not in materialSet:
materialSet.add(mat)
materialList.append(mat)
@ -212,7 +216,10 @@ def export_bm(context, bmx_filepath, prefs_fncg, opts_exportMode, opts_exportTar
mesh_vIndex = []
for f, f_index in mesh_faceIndexPairs:
# confirm material use
if mesh_noMaterial:
# a face without mtl have 2 situations. first is the whole object do not have mtl
# another is this face use an empty mtl slot.
mesh_faceNoMtl = mesh_noMaterial or (mesh_usedBlenderMtl[f.material_index] is None)
if mesh_faceNoMtl:
mesh_materialIndex = 0
else:
mesh_materialIndex = materialList.index(mesh_usedBlenderMtl[f.material_index])
@ -235,7 +242,7 @@ def export_bm(context, bmx_filepath, prefs_fncg, opts_exportMode, opts_exportTar
mesh_vIndex[0], mesh_vtIndex[0], mesh_vnIndex[0])
# set used material
UTILS_file_io.write_bool(fmesh, not mesh_noMaterial)
UTILS_file_io.write_bool(fmesh, not mesh_faceNoMtl)
UTILS_file_io.write_uint32(fmesh, mesh_materialIndex)
# free splited normals