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('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_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()))
# vertex normals should have been loaded
assert 'vertex_normals' in geom._cache.cache
# should not be watertight
assert not geom.is_volume
# make sure export doesn't crash
export = scene.export(file_type='glb')
validate_glb(export)
# 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, merge_norm=True)
assert geom.is_volume
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_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')
validate_glb(export)
reloaded = g.trimesh.load(g.trimesh.util.wrap_as_stream(export),
file_type='glb')
# make basic assertions
g.scene_equal(s, reloaded)
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('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('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_duck(self):
scene = g.get_mesh('Duck.glb')
# 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(textured=False)
assert geom.is_volume
def test_duck(self):
scene = g.get_mesh('Duck.glb')
# 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('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(textured=False)
assert geom.is_volume