public double getAccelerationY(Particle p) {
if ((p.getRecX() >= this.x) && (p.getRecX() <= (this.x + this.length)) && this.haveDone) {
p.setRecY(2 * p.getY() - p.getRecY());
this.haveDone = false;
}
return 0;
}
public double getAccelerationX(Particle p) {
if ((p.getRecY() >= this.y) && (p.getRecY() <= (this.y + this.height)) && this.haveDone) {
p.setRecX(2 * p.getX() - p.getRecX());
this.haveDone = false;
}
return 0;
}