cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   xcrunner509
   Member

   Hello. My app keeps crashing when i try to destroy a distance joint when two bodies collide.

   heres the code for my joint:
   

   //distance joint #1
   		myjoint.Initialize(ballBody, ball10Body, ballBody->GetPosition(), ball10Body->GetPosition());
   		myjoint.collideConnected = true;
   		JointA = (b2DistanceJoint*) _world->CreateJoint(&myjoint);

   and heres the code in my tick method to destroy the joint:

   std::vector<b2DistanceJoint *>toDestroy;
       std::vector<MyContact>::iterator pos;
   	for(pos = _contactListener->_contacts.begin();
   		pos != _contactListener->_contacts.end(); ++pos) {
   		MyContact contact = *pos;
   
   		if ((contact.fixtureA == _paddleFixture && contact.fixtureB == _ballFixture) ||
   			(contact.fixtureA == _ballFixture && contact.fixtureB == _paddleFixture)) {
   			NSLog(@"Paddle Hit Box #1");
   			_world->DestroyJoint(JointA);

   I'm not sure if i did this right but if someone would help me it would be appreciated.

   -Nick Homme

   Posted 1 year ago #
2. 

   robodude666
   Member

   What is _contactListener and MyContact, and where did you get _contacts from? AFAIK, b2ContactListener doesn't have a member called _contacts.

   Not entirely sure what you're doing here as there isn't enough information. A simple way to loop through all of the contacts in your world is:

   for (b2Contact* c = world->GetContactList(); c; c = c->GetNext())
   {
     // Do stuff here
   }

   Posted 1 year ago #

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