RectangleMath.java

package org.codecranachan.asteroidpush.utils;

import org.newdawn.slick.geom.Rectangle;

public class RectangleMath {
   static public Rectangle getCenteredSquare(Rectangle parentFrame) {
      float sideLength = Math.min(parentFrame.getWidth(),
                                  parentFrame.getHeight());

      float offsetX = parentFrame.getX();
      offsetX += (parentFrame.getWidth() - sideLength) / 2.0f;
      float offsetY = parentFrame.getY();
      offsetY += (parentFrame.getHeight() - sideLength) / 2.0f;

      Rectangle rect = new Rectangle(offsetX, offsetY, sideLength, sideLength);

      return rect;
   }
}