Reference on Topology/Tessellation

Creates and accesses entities that reference topological entities and that specify globally-defined attributes.

2.0

Entity type is kA3DTypeMiscReferenceOnTopology.

Referenced topological entities are retrieved by indexes which are meaningful in the context of their parent element.

For a A3DTopoConnex, it needs:

• the A3DTopoConnex index on the current A3DTopoBrepData.

For a A3DTopoShell, it needs:

• A3DUns32uiShellIndex=0;
  forallpConnexonA3DTopoBrepData
  {
  forallpShellonpConnex
  {
  ifpShelliswanted
  returnuiShellIndex;
  uiShellIndex++;
  }
  }
  

For a A3DTopoFace, it needs:

• A3DUns32uiFaceIndex=0;
  forallpConnexonA3DTopoBrepData
  {
  forallpShellonpConnex
  {
  forallpFaceonpShell
  {
  ifpFaceiswanted
  returnuiFaceIndex;
  uiFaceIndex++;
  }
  }
  }
  

For a A3DTopoEdge or A3DTopoCoEdge, it needs:

• the A3DTopoFace index on the current A3DTopoBrepData (see index need for A3DTopoFace reference).
• the A3DTopoLoop index on the current A3DTopoFace.
• the A3DTopoCoEdge index on the current A3DTopoLoop.

For a A3DTopoVertex, it needs:

• the A3DTopoFace index on the current A3DTopoBrepData (see index need for A3DTopoFace reference).
• the A3DTopoLoop index on the current A3DTopoFace.
• the A3DTopoCoEdge index on the current A3DTopoLoop.
• the A3DTopoVertex index on the current A3DTopoEdge. Is set to 0 for the start vertex, and 1 for the end vertex.

Parameters

pData: The A3DMiscReferenceOnTessData instance to create reference from

ppReferenceOnTess: A pointer to the resulting A3DMiscReferenceOnTess entity

Returns

A3D_SUCCESS on success, or an error code on failure

Structures

• A3DMiscReferenceOnTopologyData
• A3DMiscReferenceOnTessData

Functions

• A3DMiscReferenceOnTopologyGet()
• A3DMiscReferenceOnTessGet()
• A3DMiscReferenceOnTessCreate()
• A3DMiscReferenceOnTopologyCreate()