Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 4 - Geometric Objects / Geometric Objects Reference

Geometric Objects Routines / Creating and Editing Meshes

Q3Mesh_GetNumComponents

You can use the Q3Mesh_GetNumComponents function to determine the number of connected components of a mesh.

TQ3Status Q3Mesh_GetNumComponents (
TQ3GeometryObject mesh, 
unsigned long *numComponents);

mesh

A mesh.

numComponents

On exit, the number of connected components in the specified mesh.

DESCRIPTION

The Q3Mesh_GetNumComponents function returns, in the numComponents parameter, the number of connected components in the mesh specified by the mesh parameter. A connected component is a list of vertices, each of which is connected to all the others by some sequence of mesh edges. For example, a mesh that contains two cubes has two components.

SPECIAL CONSIDERATIONS

The Q3Mesh_GetNumComponents function might not accurately report the number of connected components in a mesh if called while mesh updating is delayed (that is, after a call to Q3Mesh_DelayUpdates but before the matching call to Q3Mesh_ResumeUpdates).

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