Method SetLayout

trinity/Tr2DirectInstanceData.cpp:130–146

-------------------------------------------------------------------------------------- Description: Invalidates vertex buffer, prepares instance data for a new vertex format, ensures vertex declaration matches the layout provided, and that all attributes come from stream 0. --------------------------------------------------------------------------------------

//   come from stream 0.
// --------------------------------------------------------------------------------------
void Tr2DirectInstanceData::SetLayout( const Tr2VertexDefinition& layout )
{
	m_vertexBuffer = Tr2BufferAL();
	m_stride = 0;
	m_count = 0;
	for( auto it = layout.m_items.begin(); it != layout.m_items.end(); ++it )
	{
		if( it->m_stream != 0 )
		{
			CCP_LOGERR( "Tr2DirectInstanceData: vertex layout needs to reference stream 0 only" );
			return;
		}
		m_stride = std::max( m_stride, it->m_offset + layout.GetDataTypeSizeInBytes( it->m_dataType ) );
	}
	m_layout = layout;
	m_vertexDeclaration = Tr2EffectStateManager::GetVertexDeclarationHandle( m_layout );
}

// --------------------------------------------------------------------------------------
// Description: