/** Sets specified sprite as the center of the background's viewport. */
public void setToCenter(Sprite centered) {
this.setToCenter(
(int) centered.getX(), (int) centered.getY(), centered.getWidth(), centered.getHeight());
}
/**
* Returns the distance of this sprite from the specified sprite.
*
* <p>Used this method to check whether the specified sprite is in this sprite range area or not.
*
* <p>This method can be used for :
*
* <ul>
* <li>Determining sprite attack range.
* <li>Sprite aura that affecting surrounding unit.
* <li>Activating this sprite to chase player whenever the player come closer to certain
* distance of this sprite.
* </ul>
*/
public double getDistance(Sprite other) {
return Math.sqrt(
Math.pow(this.getCenterX() - other.getCenterX(), 2)
+ Math.pow(this.getCenterY() - other.getCenterY(), 2));
}