public static GLKMatrix3 ScaleWithVector3 (GLKMatrix3 matrix, GLKVector3 scaleVector)
{
GLKMatrix3 m = new GLKMatrix3 (matrix [0] * scaleVector.x, matrix [1] * scaleVector.x, matrix [2] * scaleVector.x,
matrix [3] * scaleVector.y, matrix [4] * scaleVector.y, matrix [5] * scaleVector.y,
matrix [6] * scaleVector.z, matrix [7] * scaleVector.z, matrix [8] * scaleVector.z);
return m;
}