HM_FaceLoop
Contains information about individual face loops in the topology of mesh areas defined by the HM_Topology structure.
Syntax
struct HM_FaceLoop {
int size;
int num_edges;
int* edges;
bool* edge_dirs;
};Type
HyperMesh Ext API
Description
This structure contains information about individual face loops in the topology of mesh areas defined by the HM_Topology structure.
Each face in the set of mesh areas specified by the HM_Topology structure is assumed to have two sides. Of those two sides, the upper side is defined in such a way that in the view from above the face area is located on the left side from each of its loops.
Figure 1.
Different loops of the same face must have consistent directions. Inconsistent directions may result in a failure to resolve topology mapping to actual geometry of the model.
The structure information is declared in hm_extapi.h.
The members are: size, num_edges, edges, edge_dirs
Inputs
- size
- Specifies the length, in bytes, of the structure. Use sizeof(HM_FaceLoop) for this member. This is used to distinguish the current version of HM_FaceLoop from possible future extended versions with additional members.
- num_edges
- The number of edge occurrences in the face loop specified by this HM_FaceLoop structure Each edge occurrence is defined by a reference to an edge included into an array pointed to by the edges member of the HM_Topology structure, and by the direction of this edge with the respect to the loop direction.
- edges
- Pointer to an array of edge references. The number of values in the array must not be smaller than the value specified by the num_edges member of this HM_FaceLoop structure.
- edge_dirs
- Pointer to an array of flags specifying the direction of each edge within the loop. The number of values in the array must not be smaller than the value specified by the num_edges member of this HM_FaceLoop structure.
Errors
None.