CODEWITHSUNDEEP
cocos2d-iphonebox2dexc-bad-accessbox2d-iphone
newbie
newbie

Reputation: 23

EXC_BAD_ACCESS error in getting sprite position when mousejoint is released

I am trying to get the exact position of a sprite at the time a mousejoint moving the sprite is released (even though the sprite might still be moving) and display it. I am using Cocos2d and Box2d. Below is the code ccTouchesEnded method.

ccTouchesEnded:

- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{

if (mouseJoint)
{
    b2Fixture *fixture;
    CCSprite *mySprite = (CCSprite *) fixture->GetUserData();
    NSInteger attachedSprite = mySprite.tag;
    if (attachedSprite == 1) {
        CGPoint spritePosition = mySprite.position;

        CCLOG(@"the sprite position is x:%0.2f, y:%0.2f", spritePosition.x, spritePosition.y);
        }
    world->DestroyJoint(mouseJoint);
    mouseJoint = NULL;
}
}

I keep getting the EXC_BAD_ACCESS error pointing to the line:

CCSprite *mySprite = (CCSprite *) fixture->GetUserData();

I am not really sure what's wrong. Please help.

Upvotes: 0

Views: 339

Answers (1)

im8bit
im8bit

Reputation: 577

You are getting that error because fixture has not been initialized, check out this tutorial, how he loop over all the world elements

for(b2Body *b = _world->GetBodyList(); b; b=b->GetNext()) {
    if (b->GetUserData() != NULL) {
        CCSprite *curSprite = (CCSprite *)b->GetUserData();
...
    }
}

you have to assign something to the fixture before do the GetUserData()

Upvotes: 1

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