/** Change the velocity with the force calculations * */
private static void velChanges(Body b, ArrayList<Body> system) {
double xAccel = 0;
double yAccel = 0;
for (Body body : system) {
if (body.getSize() > 500) deletions.add(body);
if (b != body) {
/**
* Check the entire system for collisions and make the necessary changes. This way will
* prevent the ConcurrentModificationExceptions I've been fighting *
*/
Body test = crash(b, body);
if (test != null) {
if (!body.getLocked())
// Bodies get added to the list twice because a crashes
// into b and b also crashes into a.
// Added if statements to make sure that things aren't being
// double counted.
if (!deletions.contains(body)) deletions.add(body);
if (!b.getLocked()) if (!deletions.contains(b)) deletions.add(b);
if (!b.getLocked() || !body.getLocked()) {
boolean add = true;
for (int i = 0; i < additions.size(); i++) {
if (test.equals(additions.get(i))) add = false;
}
if (add) additions.add(test);
}
}
// If there's no collision, then just do the calculations.
else {
xAccel += calculateAcceleration(calculateGravity(b, body, true), b);
yAccel += calculateAcceleration(calculateGravity(b, body, false), b);
}
}
}
xAccel = Multiplier * xAccel; // Static Multipliers to
yAccel = Multiplier * yAccel; // make things play nicer
b.setvelx(b.getvelx() + xAccel);
b.setvely(b.getvely() + yAccel);
}
private static double calculateAcceleration(double Force, Body m) {
/** Force = Mass * Acceleration * */
if (m.getLocked()) return 0;
double Acc = Force / m.getMass();
return Acc;
}