1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
# Copyright 2018 The glTF-Blender-IO authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import bpy
import bmesh
from .gltf2_blender_primitive import BlenderPrimitive
from ...io.imp.gltf2_io_binary import BinaryData
from ..com.gltf2_blender_conversion import loc_gltf_to_blender
class BlenderMesh():
"""Blender Mesh."""
def __new__(cls, *args, **kwargs):
raise RuntimeError("%s should not be instantiated" % cls)
@staticmethod
def create(gltf, mesh_idx, node_idx, parent):
"""Mesh creation."""
pymesh = gltf.data.meshes[mesh_idx]
# Geometry
if pymesh.name:
mesh_name = pymesh.name
else:
mesh_name = "Mesh_" + str(mesh_idx)
mesh = bpy.data.meshes.new(mesh_name)
verts = []
edges = []
faces = []
for prim in pymesh.primitives:
verts, edges, faces = BlenderPrimitive.create(gltf, prim, verts, edges, faces)
mesh.from_pydata(verts, edges, faces)
mesh.validate()
pymesh.blender_name = mesh.name
return mesh
@staticmethod
def set_mesh(gltf, pymesh, mesh, obj):
"""Set all data after mesh creation."""
# Normals
offset = 0
custom_normals = [[0.0, 0.0, 0.0]] * len(mesh.vertices)
if gltf.import_settings['import_shading'] == "NORMALS":
mesh.create_normals_split()
for prim in pymesh.primitives:
offset = BlenderPrimitive.set_normals(gltf, prim, mesh, offset, custom_normals)
mesh.update()
# manage UV
offset = 0
for prim in pymesh.primitives:
offset = BlenderPrimitive.set_UV(gltf, prim, obj, mesh, offset)
mesh.update()
# Normals, now that every update is done
if gltf.import_settings['import_shading'] == "NORMALS":
mesh.normals_split_custom_set_from_vertices(custom_normals)
mesh.use_auto_smooth = True
# Object and UV are now created, we can set UVMap into material
for prim in pymesh.primitives:
vertex_color = None
if 'COLOR_0' in prim.attributes.keys():
vertex_color = 'COLOR_0'
BlenderPrimitive.set_UV_in_mat(gltf, prim, obj, vertex_color)
# Assign materials to mesh
offset = 0
cpt_index_mat = 0
bm = bmesh.new()
bm.from_mesh(obj.data)
bm.faces.ensure_lookup_table()
for prim in pymesh.primitives:
offset, cpt_index_mat = BlenderPrimitive.assign_material(gltf, prim, obj, bm, offset, cpt_index_mat)
bm.to_mesh(obj.data)
bm.free()
# Create shapekeys if needed
max_shape_to_create = 0
for prim in pymesh.primitives:
if prim.targets:
if len(prim.targets) > max_shape_to_create:
max_shape_to_create = len(prim.targets)
# Create basis shape key
if max_shape_to_create > 0:
obj.shape_key_add(name="Basis")
for i in range(max_shape_to_create):
obj.shape_key_add(name="target_" + str(i))
offset_idx = 0
for prim in pymesh.primitives:
if prim.targets is None:
continue
if i >= len(prim.targets):
continue
bm = bmesh.new()
bm.from_mesh(mesh)
shape_layer = bm.verts.layers.shape[i + 1]
pos = BinaryData.get_data_from_accessor(gltf, prim.targets[i]['POSITION'])
for vert in bm.verts:
if vert.index not in range(offset_idx, offset_idx + prim.vertices_length):
continue
shape = vert[shape_layer]
co = loc_gltf_to_blender(list(pos[vert.index - offset_idx]))
shape.x = obj.data.vertices[vert.index].co.x + co[0]
shape.y = obj.data.vertices[vert.index].co.y + co[1]
shape.z = obj.data.vertices[vert.index].co.z + co[2]
bm.to_mesh(obj.data)
bm.free()
offset_idx += prim.vertices_length
# set default weights for shape keys, and names
if pymesh.weights is not None:
for i in range(max_shape_to_create):
if i < len(pymesh.weights):
obj.data.shape_keys.key_blocks[i + 1].value = pymesh.weights[i]
if gltf.data.accessors[pymesh.primitives[0].targets[i]['POSITION']].name is not None:
obj.data.shape_keys.key_blocks[i + 1].name = \
gltf.data.accessors[pymesh.primitives[0].targets[i]['POSITION']].name
# Apply vertex color.
vertex_color = None
offset = 0
for prim in pymesh.primitives:
if 'COLOR_0' in prim.attributes.keys():
# Create vertex color, once only per object
if vertex_color is None:
vertex_color = obj.data.vertex_colors.new(name="COLOR_0")
color_data = BinaryData.get_data_from_accessor(gltf, prim.attributes['COLOR_0'])
for poly in mesh.polygons:
for loop_idx in range(poly.loop_start, poly.loop_start + poly.loop_total):
vert_idx = mesh.loops[loop_idx].vertex_index
if vert_idx in range(offset, offset + prim.vertices_length):
cpt_idx = vert_idx - offset
# check dimension, and add alpha if needed
if len(color_data[cpt_idx]) == 3:
vertex_color_data = color_data[cpt_idx] + (1.0,)
else:
vertex_color_data = color_data[cpt_idx]
vertex_color.data[loop_idx].color = vertex_color_data
offset = offset + prim.vertices_length
|
