docs: void initializeFromRectIsotropic(Envelope2D src, Envelope2D dest) {
  
  		if (src.isEmpty() || dest.isEmpty() || 0 == src.getWidth()
  				|| 0 == src.getHeight())
  			setZero();
  		else {
  			yx = 0;
  			xy = 0;
  			xx = dest.getWidth() / src.getWidth();
  			yy = dest.getHeight() / src.getHeight();
  			if (xx > yy)
  				xx = yy;
  			else
  				yy = xx;
  
  			Point2D destCenter = dest.getCenter();
  			Point2D srcCenter = src.getCenter();
  			xd = destCenter.x - srcCenter.x * xx;
  			yd = destCenter.y - srcCenter.y * yy;
  		}
  	}