private void TransformObj(GraphicsObject gObj, Matrix4 transMatrix)
        {
            Vertex v, n;

            for (int i = 0; i < gObj.vertices.Count; i++)
            {
                v = gObj.vertices[i];
                graphController.Dehomogenize(Vector4.Transform(graphController.Homogenize(gObj.vertices[i]), transMatrix), ref v);
                gObj.vertices[i] = v;
            }

            for (int i = 0; i < gObj.normals.Count; i++)
            {
                n = gObj.normals[i];
                graphController.Dehomogenize(Vector4.Transform(graphController.Homogenize(gObj.normals[i]), transMatrix), ref n);
                Normalize(n);
                gObj.normals[i] = n;
            }
        }