private static void ComputeVertexNormals(VertexPositionNormal[] vertices, IEnumerable<IndexedTriangleWithNormal> triangles)
{
foreach (var triangle in triangles)
{
var floats = triangle.Normal.ToArray();
vertices[triangle.A].Normal += new Vector3(floats);
vertices[triangle.B].Normal += new Vector3(floats);
vertices[triangle.C].Normal += new Vector3(floats);
}
foreach (var v in vertices)
{
v.Normal.Normalize();
}
}
