/**
* Draw shadow volume
* */
public void DrawShadowVolume(Vector3 lightPosition, Matrix4 transformation)
{
if (shadowVolumeNode == null)
{
TriangleMesh silhouetteMesh = new TriangleMesh();
shadowVolumeNode = new TriangleMeshNode(silhouetteMesh);
shadowVolumeNode.SetParentNode(this);
}
float extend = 500;
mesh.CreateShadowPolygons(lightPosition, extend, shadowVolumeNode.Mesh);
shadowVolumeNode.Traverse(RenderMode.REGULAR, transformation);
shadowVolumeNode.CreateTrianglesVBO();
}