code: public void setRotation(double angle, double x, double y, double z) {
  		this.rotateX = angle * x;
  		this.rotateY = angle * y;
  		this.rotate  = angle * z;
  	}
docs: Sets the rotation angle of the Element.
  This method wraps the glRotate method.
  
  @param angle
  The angle of rotation
  @param x
  The rate of rotation angle round x-axis
  @param y
  The rate of rotation angle round x-axis
  @param z
  The rate of rotation angle round x-axis