def test_from_polyface_type_error(msp):
polyline = msp.add_polyline3d([(0, 0, 0), (1, 0, 0)])
with pytest.raises(TypeError):
MeshBuilder.from_polyface(polyline)
line = msp.add_line(start=(0, 0, 0), end=(1, 0, 0))
with pytest.raises(TypeError):
MeshBuilder.from_polyface(line)
def cubes(self) -> Iterable[MeshBuilder]:
"""
Generates all cubes of the menger sponge as individual MeshBuilder() objects.
Yields: MeshBuilder()
"""
faces = self.faces()
for vertices in self:
mesh = MeshBuilder()
mesh.add_mesh(vertices=vertices, faces=faces)
yield mesh
def pyramids(self) -> Iterable[MeshBuilder]:
"""
Generates all pyramids of the sierpinsky pyramid as individual MeshBuilder() objects.
Yields: MeshBuilder()
"""
faces = self.faces()
for vertices in self:
mesh = MeshBuilder()
mesh.add_mesh(vertices=vertices, faces=faces)
yield mesh
def cube(center: bool = True, matrix: Matrix44 = None) -> MeshBuilder:
"""
Create a `cube <https://en.wikipedia.org/wiki/Cube>`_ as :class:`~ezdxf.render.MeshBuilder` object.
Args:
matrix: transformation matrix as :class:`~ezdxf.math.Matrix44` object
center: 'mass' center of cube, ``(0, 0, 0)`` if ``True``, else first corner at ``(0, 0, 0)``
"""
mesh = MeshBuilder()
vertices = _cube0_vertices if center else _cube_vertices
vectices = vertices if matrix is None else matrix.transform_vectors(
vertices)
mesh.add_mesh(vertices=vectices, faces=cube_faces)
return mesh
def test_from_polymesh(msp):
polymesh = msp.add_polymesh(size=(4, 4))
b = MeshBuilder.from_polyface(polymesh)
n = polymesh.dxf.n_count
m = polymesh.dxf.m_count
nfaces = (n - 1) * (m - 1)
assert len(b.vertices) == nfaces * 4 # unoptimized mesh builder
assert len(b.faces) == nfaces
def cube(center: bool = True, matrix: Matrix44 = None) -> MeshBuilder:
"""
Create a cube as MeshBuilder() object.
Args:
matrix: transformation matrix
center: 'mass' center of cube in (0, 0, 0) if True, else first corner at (0, 0, 0)
Returns: MeshBuilder()
"""
mesh = MeshBuilder()
vertices = _cube0_vertices if center else _cube_vertices
vectices = vertices if matrix is None else matrix.transform_vectors(
vertices)
mesh.add_mesh(vertices=vectices, faces=cube_faces)
return mesh
def test_has_none_planar_faces():
mesh = MeshBuilder()
mesh.add_face(REGULAR_FACE)
assert mesh.has_none_planar_faces() is False
mesh.add_face(IRREGULAR_FACE)
assert mesh.has_none_planar_faces() is True
def test_from_cube_polyface(cube_polyface):
b = MeshBuilder.from_polyface(cube_polyface)
assert len(b.vertices) == 24 # unoptimized mesh builder
assert len(b.faces) == 6
def test_from_empty_polyface(msp):
empty_polyface = msp.add_polyface()
b = MeshBuilder.from_polyface(empty_polyface)
assert len(b.vertices) == 0
assert len(b.faces) == 0
