Cocos2D/Box2D/LevelHelper Manual Collision Detection

sprite-collisions.mm

/* Put this in a subclass of LHSprite!
 * Then, in your layer's update: method you can check if a sprite is touching another sprite:
 *      [mySpriteClassInstance isCollidedWithSprite:anotherSprite];
 */

- (BOOL)isCollidedWithSprite:(LHSprite *)spriteB
{
    BOOL isTouching = FALSE;
    
    for (b2Fixture *fA = self.body->GetFixtureList(); fA; fA = fA->GetNext())
    {
        b2Shape *shapeA = fA->GetShape();
        
        for (b2Fixture *fB = spriteB.body->GetFixtureList(); fB; fB = fB->GetNext())
        {
            b2Shape *shapeB = fB->GetShape();
            
            if (b2TestOverlap(shapeA, 0, shapeB, 0, self.body->GetTransform(), spriteB.body->GetTransform()))
            {
                isTouching = TRUE;
                break;
            }
        }
        
        if (isTouching)
        {
            break;
        }
    }
    
    return isTouching;
}