What should i use to do a collision test it?

Question

I am developing a game. I would probably need to do some math in it. I have a character made out of about 5-6 bitmaps together. I want to check its collisions. For example if he hits a bullet, hit platform and all of this stuff. I also want to check if a bitmap is being pressed(like a button). I heard that a rect is good for this but I'm not sure how to use it. can anyone explain how to use the rect for it or if you have a better or easier idea. Thanks!

Possible duplicate: http://stackoverflow.com/questions/5914911/pixel-perfect-collision-detection-android — rwilliams, Oct 15 '11 at 06:05

rwilliams · Answer 1 · 2011-10-15T22:26:14.237

0

Checkout the Playing with graphics in Adroid series of articles. Collision detection is covered specifically in part 7.

edited Oct 15 '11 at 22:26

answered Oct 15 '11 at 06:03

rwilliams

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The link is broken, btw i'm using canvas, not open gl – Baruch Oct 15 '11 at 06:17
Thanks. I was updating it too :P – rwilliams Oct 15 '11 at 06:23
Thanks im going to check it out :D – Baruch Oct 15 '11 at 17:10
can you give me a tutorial just for the rect thing, i dont want to read all these pages, i just want to know if the player touches the rect, and if lets say rect A is colliding with rect B. thanks again – Baruch Oct 15 '11 at 17:35

score 0 · Accepted Answer · answered Oct 16 '11 at 05:38

Never mind, i found out that the rect class has contains option. for example:

    Rect r = new Rect();
    r.set(left, top, right, bottom);
    if (r.contains(x, y)){
        // this is where it will happen if you touch it
    }
    if (r.contains(r2)){
        //what happens if it collides with rect number 2
    }
//or check intersect        

        if(r2.intersect(r)){
//what happens if it collides with rect number 2
}

What should i use to do a collision test it?

2 Answers2