VolMesh

class compas.datastructures.VolMesh

Bases: Datastructure

Geometric implementation of a face data structure for volumetric meshes.

Parameters:

default_vertex_attributesdict, optional

Default values for vertex attributes.

default_edge_attributesdict, optional

Default values for edge attributes.

default_face_attributesdict, optional

Default values for face attributes.

default_cell_attributesdict, optional

Default values for cell attributes.

namestr, optional

The name of the volmesh.

**kwargsdict, optional

Additional keyword arguments, which are stored in the attributes dict.

Attributes:

default_vertex_attributesdict[str, Any]

Default attributes of the vertices.

default_edge_attributesdict[str, Any]

Default values for edge attributes.

default_face_attributesdict[str, Any]

Default values for face attributes.

default_cell_attributesdict[str, Any]

Default values for cell attributes.

Methods

Constructors

from_json	Construct an object of this type from a JSON file.
from_obj	Construct a volmesh object from the data described in an OBJ file.
from_vertices_and_cells	Construct a volmesh object from vertices and cells.

Conversions

cell_to_mesh	Construct a mesh object from from a cell of a volmesh.
cell_to_vertices_and_faces	Return the vertices and faces of a cell.
to_json	Convert an object to its native data representation and save it to a JSON file.
to_obj	Write the volmesh to an OBJ file.
to_vertices_and_cells	Return the vertices and cells of a volmesh.

Builders and Modifiers

add_cell	Add a cell to the volmesh object.
add_halfface	Add a face to the volmesh object.
add_vertex	Add a vertex to the volmesh object.
delete_cell	Delete a cell from the volmesh.
delete_vertex	Delete a vertex from the volmesh and everything that is attached to it.
remove_unused_vertices	Remove all unused vertices from the volmesh object.

Accessors

cell_sample	Get the identifiers of a set of random cells.
cells	Iterate over the cells of the volmesh.
cells_on_boundaries	Find the cells on the boundary.
cells_where	Get cells for which a certain condition or set of conditions is true.
cells_where_predicate	Get cells for which a certain condition or set of conditions is true using a lambda function.
edge_sample	Get the identifiers of a set of random edges.
edges	Iterate over the edges of the volmesh.
edges_where	Get edges for which a certain condition or set of conditions is true.
edges_where_predicate	Get edges for which a certain condition or set of conditions is true using a lambda function.
face_sample	Get the identifiers of a set of random faces.
faces	"Iterate over the halffaces of the volmesh and yield faces.
faces_where	Get faces for which a certain condition or set of conditions is true.
faces_where_predicate	Get faces for which a certain condition or set of conditions is true using a lambda function.
halffaces	Iterate over the halffaces of the volmesh.
halffaces_on_boundaries	Find the faces on the boundary.
vertex_sample	Get the identifiers of a set of random vertices.
vertices	Iterate over the vertices of the volmesh.
vertices_on_boundaries	Find the vertices on the boundary.
vertices_where	Get vertices for which a certain condition or set of conditions is true.
vertices_where_predicate	Get vertices for which a certain condition or set of conditions is true using a lambda function.

Attributes

cell_attribute	Get or set an attribute of a cell.
cell_attributes	Get or set multiple attributes of a cell.
cells_attribute	Get or set an attribute of multiple cells.
cells_attributes	Get or set multiple attributes of multiple cells.
edge_attribute	Get or set an attribute of an edge.
edge_attributes	Get or set multiple attributes of an edge.
edges_attribute	Get or set an attribute of multiple edges.
edges_attributes	Get or set multiple attributes of multiple edges.
face_attribute	Get or set an attribute of a face.
face_attributes	Get or set multiple attributes of a face.
faces_attribute	Get or set an attribute of multiple faces.
faces_attributes	Get or set multiple attributes of multiple faces.
vertex_attribute	Get or set an attribute of a vertex.
vertex_attributes	Get or set multiple attributes of a vertex.
vertices_attribute	Get or set an attribute of multiple vertices.
vertices_attributes	Get or set multiple attributes of multiple vertices.
update_default_cell_attributes	Update the default cell attributes.
update_default_edge_attributes	Update the default edge attributes.
update_default_face_attributes	Update the default face attributes.
update_default_vertex_attributes	Update the default vertex attributes.
unset_cell_attribute	Unset the attribute of a cell.
unset_edge_attribute	Unset the attribute of an edge.
unset_face_attribute	Unset the attribute of a face.
unset_vertex_attribute	Unset the attribute of a vertex.

Topology

cell_edges	Return all edges of a cell.
cell_face_neighbors	Find the faces adjacent to a given face of a cell.
cell_faces	The faces of a cell.
cell_halfedge_face	Find the face corresponding to a specific halfedge of a cell.
cell_halfedge_opposite_face	Find the opposite face corresponding to a specific halfedge of a cell.
cell_halfedges	The halfedges of a cell.
cell_neighbors	Find the neighbors of a given cell.
cell_vertex_faces	Ordered faces connected to a vertex of a cell.
cell_vertex_neighbors	Ordered vertex neighbors of a vertex of a cell.
cell_vertices	The vertices of a cell.
edge_cells	Ordered cells around edge (u, v).
edge_halffaces	Ordered halffaces around edge (u, v).
halfface_cell	The cell to which the halfface belongs to.
halfface_adjacent_halfface	Return the halfface adjacent to the halfface across the halfedge.
halfface_halfedges	The halfedges of a halfface.
halfface_manifold_neighbors	Return the halfface neighbors of a halfface that are on the same manifold.
halfface_manifold_neighborhood	Return the halfface neighborhood of a halfface across their edges.
halfface_opposite_cell	The cell to which the opposite halfface belongs to.
halfface_opposite_halfface	The opposite face of a face.
halfface_vertex_ancestor	Return the vertex before the specified vertex in a specific face.
halfface_vertex_descendent	Return the vertex after the specified vertex in a specific face.
halfface_vertices	The vertices of a halfface.
has_edge	Verify that the volmesh contains a directed edge (u, v).
has_halfface	Verify that a face is part of the volmesh.
has_vertex	Verify that a vertex is in the volmesh.
is_cell_on_boundary	Verify that a cell is on the boundary.
is_edge_on_boundary	Verify that an edge is on the boundary.
is_halfface_on_boundary	Verify that a face is on the boundary.
is_valid	Verify that the volmesh is valid.
is_vertex_on_boundary	Verify that a vertex is on a boundary.
number_of_cells	Count the number of faces in the volmesh.
number_of_edges	Count the number of edges in the volmesh.
number_of_faces	Count the number of faces in the volmesh.
number_of_vertices	Count the number of vertices in the volmesh.
vertex_cells	Return all cells connected to a vertex.
vertex_degree	Count the neighbors of a vertex.
vertex_halffaces	Return all halffaces connected to a vertex.
vertex_max_degree	Compute the maximum degree of all vertices.
vertex_min_degree	Compute the minimum degree of all vertices.
vertex_neighbors	Return the vertex neighbors of a vertex.
vertex_neighborhood	Return the vertices in the neighborhood of a vertex.

Geometry

cell_center	Compute the point at the center of mass of a cell.
cell_centroid	Compute the point at the centroid of a cell.
cell_points	Compute the points of the vertices of a cell.
cell_polyhedron	Construct a polyhedron from the vertices and faces of a cell.
cell_vertex_normal	Return the normal vector at the vertex of a boundary cell as the weighted average of the normals of the neighboring faces.
edge_direction	Return the direction vector of an edge.
edge_end	Return the end point of an edge.
edge_length	Return the length of an edge.
edge_line	Return the line representation of an edge.
edge_vector	Return the vector of an edge.
edge_start	Return the start point of an edge.
face_area	Compute the oriented area of a face.
face_center	Compute the point at the center of mass of a face.
face_centroid	Compute the point at the centroid of a face.
face_coordinates	Compute the coordinates of the vertices of a face.
face_normal	Compute the oriented normal of a face.
face_points	Compute the points of the vertices of a face.
face_polygon	Compute the polygon of a face.
vertex_coordinates	Return the coordinates of a vertex.
vertex_point	Return the point representation of a vertex.

Paths

Matrices

Mappings

gkey_vertex	Returns a dictionary that maps geometric keys of a certain precision to the keys of the corresponding vertices.
index_vertex	Returns a dictionary that maps the indices of a vertex list to keys in the vertex dictionary.
vertex_gkey	Returns a dictionary that maps vertex dictionary keys to the corresponding geometric key up to a certain precision.
vertex_index	Returns a dictionary that maps vertex dictionary keys to the corresponding index in a vertex list or array.

Utilities

clear	Clear all the volmesh data.
copy	Make an independent copy of the data object.

Other