Question

I have a projectile and a tower. When i hurl the projectile it strikes the tower. Based on projectile force the tower is broken. Now I need to know how to get the force that is applied to these 2 object when they collide(not before collision, rather after collision). I know in the following method they are calculated-

void MyContactListener::PostSolve(b2Contact* contact, const b2ContactImpulse *impulse)
{
    force=impulse->normalImpulses[0];
}

this gives me the overall force applied, But i want to know the individual force applied to 2 different object.

And another question , this method reside in the subclass of b2ContactListener class. How to pass this value to gameScene where object will be destroyed.

Answer 1

1. The same impulse is applied to both bodies (in opposite directions of course).

2. You will need to have a variable which is visible to both the PostSolve callback and wherever else you need to use it – a global or class variable could be used.