Game Collision detection libGDX

Question

I can do 2d collision detection of boxes and circles ,but I have a question . How can I do collision detection in this situation (1,2).I am using libGDX game engine for creating games.

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So "bitmap", then. How is (1) defined? As a mathematical circle (center, radius), or also as a bitmap? — Jongware, Jul 05 '14 at 15:34
again bitmap ... which is better? mathematical cicle or bitmap ? it is easy get bitmap center and radius — Vahe Muradyan, Jul 05 '14 at 15:35
"Better" is in the eye of the beholder. Math is easier, for me. For bitmaps, read http://stackoverflow.com/questions/5914911/pixel-perfect-collision-detection-android — Jongware, Jul 05 '14 at 15:38
https://lh4.ggpht.com/Go0_Up1ufscBIWz2g0z-kh08ivvHRb51Nn9yOY2I53nV6WU1ZLD4adbJoAqDhJfmOw=h900 I think you know this game . how it understands that player and ground are collidered ? — Vahe Muradyan, Jul 05 '14 at 15:42
@user3693550 ,probably its using box2d,the ground is a polygon and the tires of the car are circles , box2d is doing all the job. — SteveL, Jul 05 '14 at 15:52
so the ground is not a bitmap?or bitmap can be polygon too ? — Vahe Muradyan, Jul 05 '14 at 18:29
Its probably just a `Texture` that fits the `Polygon`. Posibly the `Texture` is a simple square and it is stretched regarding the hight of the current area. So both, the polygons and the view depend on this variable height, which could be generated randomly. — Robert P, Jul 07 '14 at 09:18

score 0 · Answer 1 · answered May 19 '18 at 12:42

Fixture (1) in your world should most likely be a ChainShape. ChainShapes are determined by an array of Vector2 objects, the more you have, the smoother the ChainShape tends to be.

Without very tedious scripting, making a fixture from an image is done by putting vectors at relatively close points to make a shape that looks similar to the image.

Further information on how to create a ChainShape can be found here.

Game Collision detection libGDX

1 Answers1