public void jolt() {
Random r = new Random();
Vector v = new Vector(r.nextFloat() - 0.5f, r.nextFloat() - 0.5f, 0);
v.normalize();
v.scale(0.1f);
particle.applyForce(v);
}
public void explosionAt(float mx, float my, float range, float power) {
float x = particle.getX();
float y = particle.getY();
float dx = x - mx;
float dy = y - my;
if (dx == 0) dx += 0.000001f;
if (dy == 0) dy += 0.000001f;
float d = dx * dx + dy * dy;
if (d < range * range) {
Vector push = new Vector(dx, dy, 0);
push.normalize();
push.scale(power * (1 - d / range / range));
particle.applyForce(push);
}
}