/**
* Calculates the point where given PhysicsEntity will land.
*
* @param e the physics entity which trajectory should be calculated
* @return landing poisition
*/
public static Point3D calculateLanding(PhysicsEntity e) {
int time = calculateLandingTime(e);
// double t2 = -e.getZmom() - D;
int x = e.getX() + e.getXmom() * time;
int y = e.getY() + e.getYmom() * time;
return new Point3D(x, y, 0);
}
/**
* Calculates the number of ticks to the landing of given PhysicsEntity.
*
* @param e the physics entity which trajectory should be calculated
* @return number of ticks until first bounce
*/
public static int calculateLandingTime(PhysicsEntity e) {
double d = e.getZmom() * e.getZmom() + 2 * e.getZ();
if (d < 0) {
return -1;
}
d = Math.sqrt(d);
double time = -e.getZmom() - d;
time *= -1;
return (int) time + 1;
}