public boolean isHit(Particle p) {
/*Another try
double angle = Math.atan2(Math.abs(centerY-p.getCenterY()) ,Math.abs(centerX-p.getCenterX()));
double distance1 = (Math.abs(centerX-p.getCenterX())- (width/2))*Math.cos(angle);
double distance2 = (width/2)*Math.cos(angle);
double distance = ((centerX-p.getCenterX())*(centerX-p.getCenterX())) + ((centerY-p.getCenterY()) * (centerY-p.getCenterY()));
distance = Math.sqrt(distance);
if(distance1+distance2>= distance)
{
return true;
}
else
{
return false;
}*/
// ---------------------------------------------------
// Checking distance between centers and compare it with radius,width,height
// --------------------------------------------------
double distance =
((centerX - p.getCenterX()) * (centerX - p.getCenterX()))
+ ((centerY - p.getCenterY()) * (centerY - p.getCenterY()));
distance = Math.sqrt(distance);
double dist = ((width / 2) * (width / 2)) + ((height / 2) * (height / 2));
dist = Math.sqrt(dist);
double distance2 = (p.getRadius() + dist);
if (distance <= distance2) {
hit(p);
return true;
}
return false;
}
public void hit(Particle p) {
// ---------------------------------------------------
// Do the hit action for particle and obstacle
// --------------------------------------------------
if (Math.abs(centerY - p.getCenterY()) <= (height / 2) + p.getRadius()) {
double a = p.getYVel();
p.setYVel(-a);
}
if (Math.abs(centerX - p.getCenterX()) <= (width / 2) + p.getRadius()) {
double b = p.getXVel();
p.setXVel(-b);
} else {
p.setXVel(p.getXVel());
p.setYVel(p.getYVel());
}
}