Method ProcessMeshTriangles

trinity/Resources/TriGeometryRes.cpp:1447–1528

}

void TriGeometryRes::ProcessMeshTriangles( int meshIx, PerTriangleCallback cb, void* cbContext )
{
	CCP_STATS_ZONE( __FUNCTION__ );
	USE_MAIN_THREAD_RENDER_CONTEXT();

	int i = meshIx;

	if( m_meshes[i] == NULL )
	{
		return;
	}

	auto& mesh = m_meshes[i];

	auto& lod = mesh->m_lods[0];

	if( !lod->m_allocationsValid )
	{
		return;
	}

	const uint8_t* pVertices;
	const uint8_t* pIndices;

	int vertSize = mesh->m_bytesPerVertex;

	if( FAILED( lod->m_vertexAllocation.MapForReading( pVertices, renderContext ) ) )
	{
		return;
	}
	ON_BLOCK_EXIT( [&] { lod->m_vertexAllocation.UnmapForReading( renderContext ); } );
	if( FAILED( lod->m_indexAllocation.MapForReading( pIndices, renderContext ) ) )
	{
		return;
	}
	ON_BLOCK_EXIT( [&] { lod->m_indexAllocation.UnmapForReading( renderContext ); } );

	const uint16_t* pShortIndices = (uint16_t*)pIndices;
	const uint32_t* pLongIndices = (uint32_t*)pIndices;


	Tr2VertexDefinition decl;
	if( !Tr2EffectStateManager::GetVertexDeclarationElements( mesh->m_vertexDeclarationHandle, decl ) )
	{
		return;
	}

	auto foundPosition = decl.Find( Tr2VertexDefinition::POSITION, 0 );
	if( !foundPosition )
	{
		return;
	}
	unsigned int positionByteOffset = foundPosition->m_offset;
	Tr2VertexDefinition::DataType declType = foundPosition->m_dataType;

	int numPrim = lod->m_primitiveCount;
	for( int j = 0; j < numPrim; j++ )
	{