code: public void makeScaleMatrix(double scaleX, double scaleY) {
  		this.m00 = scaleX;
  		this.m01 = 0.;
  		this.m02 = 0.;
  
  		this.m10 = 0.;
  		this.m11 = scaleY;
  		this.m12 = 0.;
  
  		this.m20 = 0.;
  		this.m21 = 0.;
  		this.m22 = 1.;
  	}
docs: Sets the value of this matrix to the given scaling, without rotation.
  
  <p>This function changes all the elements of
  the matrix, including the shearing and the
  translation.
  
  <p>After a call to this function, the matrix will
  contains (? means any value):
  <pre>
  [   sx  0   0   ]
  [   0   sy  0   ]
  [   0   0   1   ]
  </pre>
  
  @param scaleX is the scaling along X.
  @param scaleY is the scaling along Y.
  @see #setScale(double, double)
  @see #setScale(Tuple2D)