在没有Box2D的情况下为libgdx Actor实现碰撞检测

Question

I'm trying to implement collision detection for libgdx actors (player and enemies) without employing Box2D. As I've read Box2D supports inbuilt collision detection, but as my game does not involve any physics in the environment, I'm not comfortable with using Box2D just for that.

Many examples I found enable collision detection by defining a bounding box (Rectangle) for this, but I'm looking for an inbuilt solution.

Answer 1

If you do not wish to use Box2d Inbuilt collision then you can always use the Rectangle's overlap method to check whether is some rectangles have been overlapped (or collided) with each other.

So a Rectangle overlap method works something like this:

Rectangle rect1 = new Rectangle();
Rectangle rect2 = new Rectangle();
if(rect1.overlaps(rect2)){ //do your stuff here }

One thing to note here is that, you can always put your texture at the same place where your rectangle is. Hence colliding rectangle also get you colliding your sprites/textures too.

And i hope you might already know how to do that, but still below is an example:

batch.draw(myTexture,rect1.x,rect1.y,100,100);