SetMeshFormat

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• The mesh format is stored in saved TVM files and so you should not call SetMeshFormat after loading a TVM. Access violations may occur if you do.
• The mesh format for a TVMesh that is used as the reference mesh for creation of a TVMinimesh which will use a bumpmapping lighting mode must have the meshformat set before loading the geometry to:

          TV_VERTEXELEMENT[] elements = new TV_VERTEXELEMENT[6];
          elements[0].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT4;
          elements[1].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT3;
          elements[2].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT3;
          elements[3].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT3;
          elements[4].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT2;
          elements[5].element = (int)CONST_TV_ELEMENTTYPE.TV_ELEMENT_FLOAT2;

          elements[0].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_POSITION;
          elements[1].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_TANGENT;
          elements[2].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_BINORMAL;
          elements[3].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_NORMAL;
          elements[4].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_TEXCOORD0;
          elements[5].usage = (int)CONST_TV_ELEMENTUSAGE.TV_ELEMENTUSAGE_TEXCOORD3;

          elements[0].stream = 0;
          elements[1].stream = 0;
          elements[2].stream = 0;
          elements[3].stream = 0;
          elements[4].stream = 0;
          elements[5].stream = 0;

          m.SetMeshFormatEx(elements, elements.Length);
          m.SetLightingMode(CONST_TV_LIGHTINGMODE.TV_LIGHTING_BUMPMAPPING_TANGENTSPACE); // also done prior to loading geometry

          // now resume loading
          int index = m.LoadTVM(filename);