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"""
test_mutate.py
---------------
Make sure trimesh operations aren't mutating things
that they shouldn't be.
"""
try:
from . import generic as g
except BaseException:
import generic as g
def get_readonly(model_name):
"""
Get a mesh and make vertices and faces read only.
Parameters
------------
model_name : str
Model name in models directory
Returns
-----------
mesh : trimesh.Trimesh
Geometry with read-only data
verts : (n, 3) float
Read- only vertices
faces : (m, 3) int
Read- only faces
"""
original = g.get_mesh(model_name)
# get the original data from the mesh
verts = original.vertices
faces = original.faces
# use the buffer interface to generate read-only arrays
verts = g.np.ndarray(verts.shape, verts.dtype, bytes(verts.tobytes()))
faces = g.np.ndarray(faces.shape, faces.dtype, bytes(faces.tobytes()))
# everything should be read only now
assert not verts.flags["WRITEABLE"]
assert not faces.flags["WRITEABLE"]
mesh = g.trimesh.Trimesh(verts, faces, process=False, validate=False)
assert not mesh.vertices.flags["WRITEABLE"]
assert not mesh.faces.flags["WRITEABLE"]
# return the mesh, and read-only vertices and faces
return mesh, verts, faces
class MutateTests(g.unittest.TestCase):
def test_not_mutated_cube(self):
self._test_not_mutated(*get_readonly("cube.OBJ"))
def test_not_mutated_torus(self):
self._test_not_mutated(*get_readonly("torus.STL"))
def test_not_mutated_bunny(self):
self._test_not_mutated(*get_readonly("bunny.ply"))
def test_not_mutated_teapot(self):
self._test_not_mutated(*get_readonly("teapot.stl"))
def _test_not_mutated(self, mesh, verts, faces):
verts = g.np.copy(verts)
faces = g.np.copy(faces)
lo, hi = mesh.bounds
_ = mesh.faces_sparse
_ = mesh.face_normals
_ = mesh.vertex_normals
_ = mesh.extents
_ = mesh.scale
_ = mesh.centroid
_ = mesh.center_mass
_ = mesh.density
_ = mesh.volume
_ = mesh.mass
_ = mesh.moment_inertia
_ = mesh.principal_inertia_components
_ = mesh.principal_inertia_vectors
_ = mesh.principal_inertia_transform
_ = mesh.symmetry
_ = mesh.symmetry_axis
_ = mesh.symmetry_section
_ = mesh.triangles
_ = mesh.triangles_tree
_ = mesh.triangles_center
_ = mesh.triangles_cross
_ = mesh.edges
_ = mesh.edges_face
_ = mesh.edges_unique
_ = mesh.edges_unique_length
_ = mesh.edges_unique_inverse
_ = mesh.edges_sorted
_ = mesh.edges_sparse
_ = mesh.body_count
_ = mesh.faces_unique_edges
_ = mesh.euler_number
_ = mesh.referenced_vertices
_ = mesh.units
_ = mesh.face_adjacency
_ = mesh.face_adjacency_edges
_ = mesh.face_adjacency_angles
_ = mesh.face_adjacency_projections
_ = mesh.face_adjacency_convex
_ = mesh.face_adjacency_unshared
_ = mesh.face_adjacency_radius
_ = mesh.face_adjacency_span
_ = mesh.vertex_adjacency_graph
_ = mesh.vertex_neighbors
_ = mesh.is_winding_consistent
_ = mesh.is_watertight
_ = mesh.is_volume
_ = mesh.is_empty
_ = mesh.is_convex
_ = mesh.kdtree
_ = mesh.facets
_ = mesh.facets_area
_ = mesh.facets_normal
_ = mesh.facets_origin
_ = mesh.facets_boundary
_ = mesh.facets_on_hull
_ = mesh.visual
_ = mesh.convex_hull
_ = mesh.sample(500, False)
_ = mesh.voxelized((hi[0] - lo[0]) / 100.0)
_ = mesh.outline()
_ = mesh.area
_ = mesh.area_faces
_ = mesh.mass_properties
_ = mesh.scene()
_ = mesh.identifier
_ = mesh.identifier_hash
_ = mesh.to_dict()
_ = mesh.face_angles
_ = mesh.face_angles_sparse
_ = mesh.vertex_defects
_ = mesh.face_adjacency_tree
_ = mesh.copy()
# ray.intersects_id
centre = mesh.vertices.mean(axis=0)
origins = g.random((100, 3)) * 1000
directions = g.np.copy(origins)
directions[:50, :] -= centre
directions[50:, :] += centre
mesh.ray.intersects_id(origins, directions)
# nearest.vertex
points = g.random((500, 3)) * 100
mesh.nearest.vertex(points)
# section
section_count = 20
origins = g.random((section_count, 3)) * 100
normals = g.random((section_count, 3)) * 100
heights = g.random((10,)) * 100
for o, n in zip(origins, normals):
# try slicing at random origin and at center mass
mesh.slice_plane(o, n)
mesh.slice_plane(mesh.center_mass, n)
# section at random origin and center mass
mesh.section(o, n)
mesh.section(mesh.center_mass, n)
# same with multiplane
mesh.section_multiplane(o, n, heights)
mesh.section_multiplane(mesh.center_mass, n, heights)
assert not mesh.vertices.flags["WRITEABLE"]
assert not mesh.faces.flags["WRITEABLE"]
assert g.np.all(g.np.isclose(verts, mesh.vertices))
assert g.np.all(g.np.isclose(faces, mesh.faces))
if __name__ == "__main__":
g.trimesh.util.attach_to_log()
g.unittest.main()
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