CODEWITHSUNDEEP
box2d
russell
russell

Reputation: 3766

Force applied in box2d object after collision

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.

Upvotes: 0

Views: 1694

Answers (1)

iforce2d
iforce2d

Reputation: 8272

  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.

Upvotes: 1

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