-
Notifications
You must be signed in to change notification settings - Fork 561
/
test_gltf.py
247 lines (207 loc) · 8.09 KB
/
test_gltf.py
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
try:
from . import generic as g
except BaseException:
import generic as g
class GLTFTest(g.unittest.TestCase):
def test_duck(self):
scene = g.get_mesh('Duck.glb', process=False)
# should have one mesh
assert len(scene.geometry) == 1
# get the mesh
geom = next(iter(scene.geometry.values()))
# should not be watertight
assert not geom.is_volume
# make sure export doesn't crash
export = scene.export(file_type='glb')
assert len(export) > 0
# check a roundtrip
reloaded = g.trimesh.load(
g.trimesh.util.wrap_as_stream(export),
file_type='glb')
# make basic assertions
g.scene_equal(scene, reloaded)
# if we merge ugly it should now be watertight
geom.merge_vertices(merge_tex=True)
assert geom.is_volume
def test_tex_export(self):
# load textured PLY
mesh = g.get_mesh('fuze.ply')
assert hasattr(mesh.visual, 'uv')
# make sure export as GLB doesn't crash on scenes
export = mesh.scene().export(file_type='glb')
assert len(export) > 0
# make sure it works on meshes
export = mesh.export(file_type='glb')
assert len(export) > 0
def test_cesium(self):
"""
A GLTF with a multi- primitive mesh
"""
s = g.get_mesh('CesiumMilkTruck.glb')
# should be one Trimesh object per GLTF "primitive"
assert len(s.geometry) == 4
# every geometry displayed once, except wheels twice
assert len(s.graph.nodes_geometry) == 5
# make sure export doesn't crash
export = s.export(file_type='glb')
assert len(export) > 0
reloaded = g.trimesh.load(
g.trimesh.util.wrap_as_stream(export),
file_type='glb')
# make basic assertions
g.scene_equal(s, reloaded)
def test_units(self):
"""
Trimesh will store units as a GLTF extra if they
are defined so check that.
"""
original = g.get_mesh('pins.glb')
# export it as a a GLB file
export = original.export(file_type='glb')
kwargs = g.trimesh.exchange.gltf.load_glb(
g.trimesh.util.wrap_as_stream(export))
# roundtrip it
reloaded = g.trimesh.exchange.load.load_kwargs(kwargs)
# make basic assertions
g.scene_equal(original, reloaded)
# make assertions on original and reloaded
for scene in [original, reloaded]:
# units should be stored as an extra
assert scene.units == 'mm'
# make sure we have two unique geometries
assert len(scene.geometry) == 2
# that should have seven instances
assert len(scene.graph.nodes_geometry) == 7
# all meshes should be well constructed
assert all(m.is_volume for m in
scene.geometry.values())
# check unit conversions for fun
extents = scene.extents.copy()
as_in = scene.convert_units('in')
# should all be exactly mm -> in conversion factor
assert g.np.allclose(
extents / as_in.extents, 25.4, atol=.001)
m = g.get_mesh('testplate.glb')
assert m.units == 'meters'
def test_gltf(self):
# split a multibody mesh into a scene
scene = g.trimesh.scene.split_scene(
g.get_mesh('cycloidal.ply'))
# should be 117 geometries
assert len(scene.geometry) >= 117
# a dict with {file name: str}
export = scene.export(file_type='gltf')
# load from just resolver
r = g.trimesh.load(file_obj=None,
file_type='gltf',
resolver=export)
# will assert round trip is roughly equal
g.scene_equal(r, scene)
# try loading from a ZIP archive
zipped = g.trimesh.util.compress(export)
r = g.trimesh.load(
file_obj=g.trimesh.util.wrap_as_stream(zipped),
file_type='zip')
# try loading from a file name
# will require a file path resolver
with g.TemporaryDirectory() as d:
for file_name, data in export.items():
with open(g.os.path.join(d, file_name), 'wb') as f:
f.write(data)
# load from file path of header GLTF
rd = g.trimesh.load(
g.os.path.join(d, 'model.gltf'))
# will assert round trip is roughly equal
g.scene_equal(rd, scene)
def test_gltf_pole(self):
scene = g.get_mesh('simple_pole.glb')
# should have multiple primitives
assert len(scene.geometry) == 11
export = scene.export(file_type='glb')
assert len(export) > 0
# check a roundtrip
reloaded = g.trimesh.load(
g.trimesh.util.wrap_as_stream(export),
file_type='glb')
# make basic assertions
g.scene_equal(scene, reloaded)
def test_material_hash(self):
# load mesh twice independently
a = g.get_mesh('fuze.obj')
b = g.get_mesh('fuze.obj')
# move one of the meshes away from the other
a.apply_translation([a.scale, 0, 0])
# materials should not be the same object
assert id(a.visual.material) != id(b.visual.material)
# despite being loaded separately material hash should match
assert hash(a.visual.material) == hash(b.visual.material)
# create a scene with two meshes
scene = g.trimesh.Scene([a, b])
# get the exported GLTF header of a scene with both meshes
header = g.json.loads(scene.export(
file_type='gltf')['model.gltf'].decode('utf-8'))
# header should contain exactly one material
assert len(header['materials']) == 1
# both meshes should be contained in the export
assert len(header['meshes']) == 2
# get a reloaded version
reloaded = g.trimesh.load(
file_obj=g.trimesh.util.wrap_as_stream(
scene.export(file_type='glb')),
file_type='glb')
# meshes should have survived
assert len(reloaded.geometry) == 2
# get meshes back
ar, br = reloaded.geometry.values()
# should have been loaded as a PBR material
assert isinstance(ar.visual.material,
g.trimesh.visual.material.PBRMaterial)
# materials should have the same memory location
assert id(ar.visual.material) == id(br.visual.material)
# make sure hash is returning something
ahash = hash(ar.visual.material)
# should be returning valid material hashes
assert isinstance(ahash, int)
assert ahash != 0
def test_node_name(self):
"""
Test to see if node names generally survive
an export-import cycle.
"""
# a scene
s = g.get_mesh('cycloidal.3DXML')
# export as GLB then re-load
r = g.trimesh.load(
g.trimesh.util.wrap_as_stream(
s.export(file_type='glb')),
file_type='glb')
# make sure we have the same geometries before and after
assert set(s.geometry.keys()) == set(r.geometry.keys())
# make sure the node names are the same before and after
assert (set(s.graph.nodes_geometry) ==
set(r.graph.nodes_geometry))
def test_schema(self):
# get a copy of the GLTF schema and do simple checks
s = g.trimesh.exchange.gltf.get_schema()
# make sure it has at least the keys we expect
assert set(s['properties'].keys()).issuperset(
{'accessors',
'animations',
'asset',
'buffers',
'bufferViews',
'cameras',
'images',
'materials',
'meshes',
'nodes',
'samplers',
'scene',
'scenes',
'skins',
'textures',
'extensions',
'extras'})
if __name__ == '__main__':
g.trimesh.util.attach_to_log()
g.unittest.main()