GreenXenith/io_scene_b3d
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Use loop normals when vertex-normals are requested. (#7)

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Enables correct use of split normals and smooth/flat shading
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x2048 2022-08-06 23:36:03 +02:00 committed by GitHub
parent f189786f72
commit 19560787e8
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2 changed files with 7 additions and 5 deletions
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1
__init__.py
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@ -118,6 +118,7 @@ class ExportB3D(bpy.types.Operator, ExportHelper):
def execute(self, context):
from . import export_b3d
export_b3d.b3d_parameters["vertex-normals"] = True
export_b3d.b3d_parameters["export-selected"] = self.use_selection
keywords = self.as_keywords(ignore=("filter_glob", "check_existing"))

11
export_b3d.py
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@ -1092,6 +1092,7 @@ def write_node_mesh_vrts(obj, data, obj_count, arm_action, exp_root):
my_uvs[f.index].append(uv)
uv_layers_count = len(getUVTextures(data))
data.calc_normals_split() # ensure loop normals are valid
for face in getFaces(data):
if DEBUG: print(" <!-- Face",face.index,"-->")
@ -1102,8 +1103,10 @@ def write_node_mesh_vrts(obj, data, obj_count, arm_action, exp_root):
per_face_vertices[face.index] = []
for vertex_id,vert in enumerate(face.vertices):
for vertex_id, loop_index in enumerate(face.loop_indices):
loop = data.loops[loop_index]
vert = loop.vertex_index
ivert += 1
per_face_vertices[face.index].append(ivert)
@ -1125,13 +1128,11 @@ def write_node_mesh_vrts(obj, data, obj_count, arm_action, exp_root):
#time_in_a += b - a
if b3d_parameters.get("vertex-normals"):
norm_matrix = mathutils.Matrix.Translation(data.vertices[vert].normal)
if arm_action:
norm_matrix @= mesh_matrix
norm_matrix = mathutils.Matrix.Translation(loop.normal)
norm_matrix @= TRANS_MATRIX
normal_vector = norm_matrix.to_translation()
normal_vector.normalize()
temp_buf.append(write_float_triplet(normal_vector.x, #NX
normal_vector.z, #NY