2.3.3.3.60. NXcg_half_edge_data_structure¶
Status:
base class, extends NXcg_primitive_set
Description:
Computational geeometry description of a half-edge data structure. ...
Computational geeometry description of a half-edge data structure.
Such a data structure can be used to efficiently circulate around faces and iterate over vertices of a planar graph.
Symbols:
The symbols used in the schema to specify e.g. dimensions of arrays.
d: The dimensionality, which has to be at least 2.
n_v: The number of vertices.
n_f: The number of faces.
n_he: The number of half-edges.
- Groups cited:
none
Structure:
number_of_vertices: (optional) NX_INT (Rank: 1, Dimensions: [n_f]) {units=NX_UNITLESS}
Number of vertices for each face. ...
Number of vertices for each face.
Each entry represents the total number of vertices for that face, irrespectively whether vertices are shared among faces or not.
number_of_edges: (optional) NX_INT (Rank: 1, Dimensions: [n_e]) {units=NX_UNITLESS}
Number of edges for each face. ...
Number of edges for each face.
Each entry represents the total number of edges for that face, irrespectively whether edges are shared across faces or not.
number_of_faces: (optional) NX_INT {units=NX_UNITLESS}
Number of faces of the primitives.
vertex_identifier_offset: (optional) NX_INT {units=NX_UNITLESS}
Integer offset whereby the identifier of the first member ...
Integer offset whereby the identifier of the first member of the vertices differs from zero.
Identifier can be defined explicitly or implicitly. Inspect the definition of NXcg_primitive_set for further details.
edge_identifier_offset: (optional) NX_INT {units=NX_UNITLESS}
Integer offset whereby the identifier of the first member ...
Integer offset whereby the identifier of the first member of the edges differs from zero.
Identifier can be defined explicitly or implicitly. Inspect the definition of NXcg_primitive_set for further details.
face_identifier_offset: (optional) NX_INT
Integer offset whereby the identifier of the first member ...
Integer offset whereby the identifier of the first member of the faces differs from zero.
Identifier can be defined explicitly or implicitly. Inspect the definition of NXcg_primitive_set for further details.
position: (optional) NX_NUMBER (Rank: 2, Dimensions: [n_v, d]) {units=NX_ANY}
The position of the vertices.
vertex_incident_half_edge: (optional) NX_INT (Rank: 1, Dimensions: [n_v]) {units=NX_UNITLESS}
Identifier of the incident half-edge.
face_half_edge: (optional) NX_INT (Rank: 1, Dimensions: [n_f]) {units=NX_UNITLESS}
Identifier of the (starting)/associated half-edge of the face.
half_edge_vertex_origin: (optional) NX_INT (Rank: 1, Dimensions: [n_he]) {units=NX_UNITLESS}
The identifier of the vertex from which this half-edge is outwards pointing.
half_edge_twin: (optional) NX_INT (Rank: 1, Dimensions: [n_he]) {units=NX_UNITLESS}
Identifier of the associated oppositely pointing half-edge.
half_edge_incident_face: (optional) NX_INT (Rank: 1, Dimensions: [n_he]) {units=NX_UNITLESS}
If the half-edge is a boundary half-edge the ...
If the half-edge is a boundary half-edge the incident face identifier is NULL, i.e. 0.
half_edge_next: (optional) NX_INT (Rank: 1, Dimensions: [n_he]) {units=NX_UNITLESS}
Identifier of the next half-edge.
half_edge_prev: (optional) NX_INT (Rank: 1, Dimensions: [n_he]) {units=NX_UNITLESS}
Identifier of the previous half-edge.
weinberg_vector: (optional) NX_CHAR
Users are referred to the literature for the background of L. Weinberg's ...
Users are referred to the literature for the background of L. Weinberg’s work about topological characterization of planar graphs:
and how this work can e.g. be applied in space-filling tessellations of microstructural objects like crystals/grains.
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.
