Re: object on a string damping

Try this:

g = 3500; // gravity (pixels/second/second)
floor = 400;
e = .35; //elasticity

b = floor - position[1];
h = b;
T = Math.sqrt(2*h/g);

if (time < T){
y = - g*time*time/2 + b;
}else{
Vy = g*T;
while (true){
Vy *= e;
t = T;
T += 2*Vy/g;
if (time < T){
t = time - t;
y = Vy*t - g*t*t/2;
break;
}else if (T - t < thisComp.frameDuration){
y = 0;
break;
}
} // end while
}
[value[0], floor - y]



Dan