In an action game, a very important technique is to detect collisions between each sprite. However, it is pretty complicated to detect collisions between rect and rect or rect and point. In this recipe, you will learn how to detect collisions easily.
There are two ways to detect collisions. The first method checks whether a point is contained within the rectangle of the sprite.
Rect rect = sprite->getBoundingBox(); if (rect.containsPoint(Vec2())) { CCLOG("the point bumped rectangle"); }
The second method checks whether two sprite's rectangles have overlapped.
if (rect.intersectsRect(Rect(0, 0, 100, 100))) { CCLOG("two rectangles bumped");}
The Rect class has two properties—size and origin. The size property is the sprite's size. The origin property is the sprite's left-bottom coordinate. Firstly, you get the sprite's rect using the getBoundingBox method.
Using the Rect::containsPoint method by specifying the coordinate, it is possible...