Learning Cocos2d-x Game Development

Coding collision detection

To detect collision, we add a new function in the GameplayLayer class that will detect collision between two CCSprites and return a value after checking whether the collision occurred or not.

Add the following to the GameplayLayer.h file:

bool checkBoxCollision(CCSprite* box1, CCSprite *box2);

And at the end of GameplayLayer.cpp, add the following:

bool GameplayLayer::checkBoxCollision(CCSprite* box1, CCSprite *box2)
{
    CCRect box1Rect = box1->boundingBox();
      
    
    CCRect box2Rect = box2->boundingBox();
    
    
    if (box1Rect.intersectsRect(box2Rect))
    {
        return true;
    }
    else
    {
        return false;
    }
}

This code gets the two sprites that are given to it, and then for each of the sprites, it builds a collision box depending upon the position, width, ...