Creates and accesses tessellation entities. More...

Modules

 Tessellation Base
 Functions for setting and getting data common to all tessellation entities.
 
 Tess3D
 Tessellation for solids and surfaces.
 
 Tess3DWire
 Tessellation for 3D wireframes.
 
 Tessellation for Markups
 Tessellation for markups.
 

Detailed Description

Creates and accesses tessellation entities.

This module describes how to access and encode tessellation for a variety of entities. It also provides information about tessellations, associated textures, and markup representations.

Usage
Tessellation entities can appear in the pTessBase member of all types of representation items, except A3DRiCoordinateSystem and A3DRiPointSet.

If your application parses PRC content, you must develop dedicated functions to parse the base tessellation data and to parse each type of tessellation entity. The following sample code demonstrates the following basic steps:

  1. Use the A3DTessBaseGet function to get the tessellation base data.
  2. Use the A3DEntityGetType function to determine the specific tessellation type.
  3. Invoke a custom function to parse the entity contents.
Sample code
/* Call the A3DRiRepresentationItemGet function to get the A3DRiRepresentationItemData */
if ( sRiData.m_pTessBase != NULL )
{
if ( A3DEntityGetType( sRiData.m_pTessBase, &eType) == A3D_SUCCESS )
{
switch(eType)
{
{
A3DTess3D* pTess3D = (A3DTess3D*)sRiData.m_pTessBase;
/* Call corresponding function... */
break;
}
{
A3DTess3DWire* pTess3DWire = (A3DTess3DWire*)sRiData.m_pTessBase;
/* Call corresponding function... */
break;
}
{
A3DTessMarkup* pTessMarkup = (A3DTessMarkup*)sRiData.m_pTessBase;
/* Call corresponding function... */
break;
}
default:
/* Nothing else */
break;
}
}
}
See also
A3DTess3D
A3DTess3DWire
A3DTessMarkup