void the_derive(double time, double y[], double dy[]) {
int i;
BallVector balls = decode_balls(y); // new BallVector();//Ball[num_balls];
BallVector dballs = new BallVector(); // new Ball[num_balls];
for (i = 0; i < num_balls; i++) {
Ball p = balls.get2(i);
Ball d = new Ball();
d.pos = p.speed;
d.speed = wall_power(p);
d.speed.y -= 1; // gravity
dballs.add(d);
}
for (i = 0; i < num_balls; i++)
for (int j = i + 1; j < num_balls; j++) {
Ball p1 = balls.get2(i);
Ball p2 = balls.get2(j);
if (far_away_fast_calc(p1.pos, p2.pos, radius * 2)) continue;
double dist = p1.pos.calc_dist(p2.pos);
// if (dist>radius*2)
// continue;
Vec collide_power = calc_collide_power(p1, p2, dist);
dballs.get2(i).speed.add_to(collide_power);
dballs.get2(j).speed.sub_to(collide_power);
}
for (i = 0; i < springs.size(); i++) {
Spring s = springs.get2(i);
Vec collide_power = calc_spring_power(balls.get2(s.start), balls.get2(s.end));
dballs.get2(s.start).speed.add_to(collide_power);
dballs.get2(s.end).speed.sub_to(collide_power);
}
encode_balls(dballs, dy);
};
public void controlEvent(ControlEvent theEvent) {
// DropdownList is of type ControlGroup.
// A controlEvent will be triggered from inside the ControlGroup class.
// therefore you need to check the originator of the Event with
// if (theEvent.isGroup())
// to avoid an error message thrown by controlP5.
/* if (theEvent.getController().getName().equals("restart")) {
paddles[0].points=0;
paddles[1].points=0;
}*/
if (theEvent.isGroup()) {
// check if the Event was triggered from a ControlGroup
// println("event from group : "+theEvent.getGroup().getValue()+" from
// "+theEvent.getGroup());
if (theEvent.getGroup().toString().equals("paddle1 [DropdownList]")) {
println("paddle1 " + theEvent.getGroup().getValue());
paddleSelector1 = translations[(int) theEvent.getGroup().getValue()];
println(jointNames[paddleSelector1]);
} else if (theEvent.getGroup().toString().equals("paddle2 [DropdownList]")) {
println("paddle2 " + theEvent.getGroup().getValue());
paddleSelector2 = translations[(int) theEvent.getGroup().getValue()];
println(jointNames[paddleSelector2]);
} else if (theEvent.getGroup().toString().equals("1_or_2_player [DropdownList]")) {
if ((int) theEvent.getGroup().getValue() == 0) {
onePlayer = true;
} else {
onePlayer = false;
}
} else if (theEvent.getGroup().toString().equals("speed [DropdownList]")) {
if ((int) theEvent.getGroup().getValue() == 0) {
ball.speed = new PVector(5, 5);
} else if ((int) theEvent.getGroup().getValue() == 1) {
ball.speed = new PVector(10, 10);
} else if ((int) theEvent.getGroup().getValue() == 2) {
ball.speed = new PVector(15, 15);
}
}
} else if (theEvent.isController()) {
println(
"event from controller : "
+ theEvent.getController().getValue()
+ " from "
+ theEvent.getController());
}
}
