package ballWorlds;

import java.awt.geom.Point2D;

/**
 * A BallDescriber is an object that can describe (return) its velocity, size,
 * and mass, in addition to its inherited (from Drawable) ability to describe
 * its Color and Shape.
 * 
 * @author David Mutchler, Salman Azhar, Curt Clifton and others, January 2005.
 *         Modified September 2008, September 2009.
 */
public interface BallDescriber extends Drawable {

	/**
	 * Returns the velocity (i.e., speed in x-direction and speed in
	 * y-direction) of this BallDescriber.
	 * 
	 * @return the velocity (i.e., speed in x-direction and speed in
	 *         y-direction) of this BallDescriber.
	 */
	public Point2D getVelocity();

	/**
	 * Returns the mass of this BallDescriber.
	 * 
	 * @return the mass of this BallDescriber.
	 */
	public double getMass();
	
	/**
	 * Returns the size of this BallDescriber.
	 * 
	 * @return the size of this BallDescriber.
	 */
	public double getSize();
}