4 Q3Mesh_GetFaceIndex

You can use the Q3Mesh_GetFaceIndex function to get the index of a mesh face.

TQ3Status Q3Mesh_GetFaceIndex (
TQ3GeometryObject mesh, 
TQ3MeshFace face, 
unsigned long *index);
mesh A mesh.
face A mesh face.
index On exit, the index of the specified mesh face.

DESCRIPTION


The Q3Mesh_GetFaceIndex function returns, in the index parameter, the index of the mesh face specified by the mesh and face parameters. A face index is a unique integer (between 0 and the total number of faces in the mesh minus 1) associated with a face.

Face indices are volatile and can be changed by functions that alter the topology of a mesh (such as functions that add or delete faces or vertices), and by writing, picking, rendering, or duplicating a mesh, or by calling Q3Mesh_DelayUpdates. As a result, you should rely on an index returned by Q3Mesh_GetFaceIndex only until you perform one of these operations.<8batcolor>s

DESCRIPTION

3D Graphics Programming with QuickDraw 3D - 21 OCT 1995

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