/// <summary>
/// Creates a vertex buffer from the data added so far
/// </summary>
public IVertexBuffer Build( )
{
int numVertices = -1;
foreach ( KeyValuePair<VertexFieldSemantic, List<float>> kvp in m_Streams )
{
int streamVertexCount = kvp.Value.Count / m_Format.GetDescriptor( kvp.Key ).NumElements;
if ( numVertices == -1 )
{
numVertices = streamVertexCount;
continue;
}
if ( numVertices != streamVertexCount )
{
throw new InvalidOperationException( string.Format( "Expected stream for field \"{0}\" to contain {1} vertices, not {2}", kvp.Key, numVertices, streamVertexCount ) );
}
}
VertexBufferData data = new VertexBufferData( m_Format, numVertices );
foreach ( KeyValuePair<VertexFieldSemantic, List<float>> kvp in m_Streams )
{
float[] elements = data.Add<float>( kvp.Key, m_Format.GetDescriptor( kvp.Key ).NumElements );
Debug.Assert( elements.Length == kvp.Value.Count );
for ( int elementIndex = 0; elementIndex < elements.Length; ++elementIndex )
{
elements[ elementIndex ] = kvp.Value[ elementIndex ];
}
}
IVertexBuffer vb = Graphics.Factory.CreateVertexBuffer( );
vb.Create( data );
return vb;
}
