def separate_graph(edges):
""" Split graph into disconnected components.
Args:
edges (:class:`numpy.ndarray`): edges of the graph.
Returns:
An array of indices indicating the component each edge belongs to.
"""
separator = MeshSeparator(edges);
separator.set_connectivity_type(MeshSeparator.VERTEX);
num_comps = separator.separate();
comp_indices = np.zeros(len(edges));
for i in range(num_comps):
src_idx = separator.get_sources(i).ravel();
comp_indices[src_idx] = i;
return comp_indices;
def separate_graph(edges):
""" Split graph into disconnected components.
Args:
edges (:class:`numpy.ndarray`): edges of the graph.
Returns:
An array of indices indicating the component each edge belongs to.
"""
separator = MeshSeparator(edges)
separator.set_connectivity_type(MeshSeparator.VERTEX)
num_comps = separator.separate()
comp_indices = np.zeros(len(edges))
for i in range(num_comps):
src_idx = separator.get_sources(i).ravel()
comp_indices[src_idx] = i
return comp_indices
def separate_mesh(mesh, connectivity_type="auto"):
""" Split mesh into connected components.
Args:
mesh (:class:`Mesh`): Input mesh.
connectivity_type (:py:class:`str`): possible types are
* ``auto``: Same as ``face`` for surface mesh, ``voxel`` for voxel mesh.
* ``vertex``: Group component based on vertex connectivity.
* ``face``: Group component based on face connectivity.
* ``voxel``: Group component based on voxel connectivity.
Returns:
A list of meshes, each represent a single connected component. Each
output component have the following attributes defined:
* ``ori_vertex_index``: The input vertex index of each output vertex.
* ``ori_elem_index``: The input element index of each output element.
"""
is_voxel_mesh = mesh.num_voxels > 0;
if connectivity_type == "auto":
if is_voxel_mesh:
connectivity_type = "voxel";
else:
connectivity_type = "face";
if connectivity_type == "vertex":
if is_voxel_mesh > 0:
separator = MeshSeparator(mesh.voxels);
else:
separator = MeshSeparator(mesh.faces);
separator.set_connectivity_type(MeshSeparator.VERTEX);
elif connectivity_type == "face":
separator = MeshSeparator(mesh.faces);
separator.set_connectivity_type(MeshSeparator.FACE);
elif connectivity_type == "voxel":
separator = MeshSeparator(mesh.voxels);
separator.set_connectivity_type(MeshSeparator.VOXEL);
else:
raise RuntimeError("Unsupported connectivity type: {}".format(
connectivity_type));
num_comps = separator.separate();
comp_meshes = [];
for i in range(num_comps):
comp = separator.get_component(i);
elem_sources = separator.get_sources(i).ravel();
vertices, comp, info = remove_isolated_vertices_raw(
mesh.vertices, comp);
if is_voxel_mesh:
comp_mesh = form_mesh(vertices, np.zeros((0, 3)), comp);
else:
comp_mesh = form_mesh(vertices, comp);
comp_mesh.add_attribute("ori_vertex_index");
comp_mesh.set_attribute("ori_vertex_index", info["ori_vertex_index"]);
comp_mesh.add_attribute("ori_elem_index");
comp_mesh.set_attribute("ori_elem_index", elem_sources);
comp_meshes.append(comp_mesh);
return comp_meshes;
def separate_mesh(mesh, connectivity_type="auto"):
""" Split mesh into connected components.
Args:
mesh (:class:`Mesh`): Input mesh.
connectivity_type (:py:class:`str`): possible types are
* ``auto``: Same as ``face`` for surface mesh, ``voxel`` for voxel mesh.
* ``vertex``: Group component based on vertex connectivity.
* ``face``: Group component based on face connectivity.
* ``voxel``: Group component based on voxel connectivity.
Returns:
A list of meshes, each represent a single connected component. Each
output component have the following attributes defined:
* ``ori_vertex_index``: The input vertex index of each output vertex.
* ``ori_elem_index``: The input element index of each output element.
"""
is_voxel_mesh = mesh.num_voxels > 0
if connectivity_type == "auto":
if is_voxel_mesh:
connectivity_type = "voxel"
else:
connectivity_type = "face"
if connectivity_type == "vertex":
if is_voxel_mesh > 0:
separator = MeshSeparator(mesh.voxels)
else:
separator = MeshSeparator(mesh.faces)
separator.set_connectivity_type(MeshSeparator.VERTEX)
elif connectivity_type == "face":
separator = MeshSeparator(mesh.faces)
separator.set_connectivity_type(MeshSeparator.FACE)
elif connectivity_type == "voxel":
separator = MeshSeparator(mesh.voxels)
separator.set_connectivity_type(MeshSeparator.VOXEL)
else:
raise RuntimeError(
"Unsupported connectivity type: {}".format(connectivity_type))
num_comps = separator.separate()
comp_meshes = []
for i in range(num_comps):
comp = separator.get_component(i)
elem_sources = separator.get_sources(i).ravel()
vertices, comp, info = remove_isolated_vertices_raw(
mesh.vertices, comp)
if is_voxel_mesh:
comp_mesh = form_mesh(vertices, np.zeros((0, 3)), comp)
else:
comp_mesh = form_mesh(vertices, comp)
comp_mesh.add_attribute("ori_vertex_index")
comp_mesh.set_attribute("ori_vertex_index", info["ori_vertex_index"])
comp_mesh.add_attribute("ori_elem_index")
comp_mesh.set_attribute("ori_elem_index", elem_sources)
comp_meshes.append(comp_mesh)
return comp_meshes
