public boolean bounce(Rectangle2D.Double rect, boolean isPaddle) {
int _oldAngle = _angle;
double x = _circle.getCenterX();
double y = _circle.getCenterY();
if (isPaddle) {
if (_circle.intersects(rect)) {
_gravity = -4;
if ((_circle.getY() + 10) >= rect.getY()
&& _circle.getX() + 5 >= rect.getX()
&& _circle.getX() + 5 <= rect.getX() + rect.getWidth()
&& _circle.intersects(rect)) {
_angle = 135 - (int) (90.0 * ((x - rect.getX()) / rect.getWidth()));
} else if (rect.getX() - x <= 5) {
_angle = 150;
} else if (rect.getX() + rect.getWidth() - _circle.getX() <= 5) {
_angle = 30;
}
}
} else {
if (_circle.intersects(rect)) {
if (x >= rect.getX() + .1 && x <= rect.getX() + rect.getWidth() + .1) _angle = 0 - _angle;
else if (y >= rect.getY() + .1 && y <= rect.getY() + rect.getWidth() + .1)
if (_angle > 180) _angle = 540 - _angle;
else _angle = 180 - _angle;
}
}
if (_circle.getX() + (_speed * (Math.cos(Math.toRadians(_angle))) / 100) < 0 && !_intersects) {
if (_angle > 180) _angle = 540 - _angle;
else _angle = 180 - _angle;
return false;
}
if (_circle.getY() - (_speed * (Math.sin(Math.toRadians(_angle))) / 100) < 0 && !_intersects) {
_angle = 0 - _angle;
_gravity = 0;
return false;
}
if (_circle.getX() + _circle.getWidth() + (_speed * (Math.cos(Math.toRadians(_angle))) / 100)
> 800
&& !_intersects) {
if (_angle > 180) _angle = 180 + 180 - (_angle - 180);
else _angle = 180 - _angle;
return false;
}
if (_circle.getX() + _circle.getWidth() + (_speed * (Math.cos(Math.toRadians(_angle))) / 100)
> 800
|| _circle.getY() < 0
|| _circle.getX() < 0) _intersects = true;
else _intersects = false;
return _angle != _oldAngle;
}
public void update() {
_circle.setFrame(
_circle.getX() + (_speed * (Math.cos(Math.toRadians(_angle))) / 100),
_circle.getY() - (_speed * (Math.sin(Math.toRadians(_angle))) / 100) + _gravity,
10,
10);
_gravity += 0.06;
}