83 lines
2.1 KiB
Java
83 lines
2.1 KiB
Java
package break_out.model;
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import break_out.Constants;
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/**
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* This class contains the information about the balls characteristics and behavior
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*
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* @author iSchumacher
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* @author modified by 175
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*
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*/
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public class Ball implements IBall{
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/**
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* The balls position on the playground
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*/
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private Position position;
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/**
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* The balls direction
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*/
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private Vector2D direction;
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/**
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* The constructor of a ball
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* The balls position and direction are initialized here.
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*/
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public Ball() {
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this.position = new Position(0, 0);
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this.direction = new Vector2D(Constants.BALL_SPEED,Constants.BALL_SPEED);
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this.direction.rescale();
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// start at bottom-center
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this.position.setX(Constants.SCREEN_WIDTH/2);
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this.position.setY(Constants.SCREEN_HEIGHT-3*Constants.BALL_DIAMETER);
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}
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/**
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* The getter for the balls position
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* @return position The balls current position
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*/
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public Position getPosition() {
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return this.position;
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}
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/**
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* The getter for the balls direction
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* @return direction The balls current direction
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*/
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public Vector2D getDirection() {
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return this.direction;
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}
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/**
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* updates ball position
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*/
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public void updatePosition() {
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// sets X position
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this.position.setX(this.position.getX()+this.direction.getDx());
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// sets Y position
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this.position.setY(this.position.getY()+this.direction.getDy());
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}
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/**
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* Ball reacts to contact with the borders
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*/
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public void reactOnBorder() {
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// reacts on left border
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if(this.position.getX() < 0) this.direction.setDx(-(this.direction.getDx()));
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// reacts on right border (+Diameter because of hitbox)
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if(this.position.getX()+Constants.BALL_DIAMETER > Constants.SCREEN_WIDTH) this.direction.setDx(-(this.direction.getDx()));
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// reacts on top border
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if(this.position.getY() < 0) this.direction.setDy(-(this.direction.getDy()));
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// reacts on bottom border (+Diameter because of hitbox)
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if(this.position.getY()+Constants.BALL_DIAMETER > Constants.SCREEN_HEIGHT) this.direction.setDy(-(this.direction.getDy()));
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}
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}
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