Cocos2d Chipmunk physics issue

Question

I am working on the game with chipmunk physics (SpriteBuilder + Cocos2d v3). There is one game object with dynamic body and several "walls" (static bodies).

When my game object falls to the wall under it, it passes some through static body a bit and then the static body pushes out of himself.

This doesn't happens all times, may be 50% times. Velocity isn't very high. Game object (dynamic) falls about half of phone screen.

And. I've seen this issue only some days ago, early all was fine.

Dynamic object Rect, affected by gravity, allows rotation. Dencity = 1, Friction = 1, Elasticity = 0.3 Walls = [CCPhysicsBody bodyWithRect:objectRectForPh cornerRadius:0], all other physic parameters default.

There is no any collision handling code

there's not enough context (code, collision setup, positions and shapes, exact behavior) to answer this question in a meaningful way — CodeSmile, Jan 03 '15 at 13:22
Solved by adding: [[CCDirector sharedDirector] setFixedUpdateInterval:1/180.0f]; _physicsNode.space.collisionBias = 0; — user3770313, Jan 09 '15 at 14:55

score 1 · Answer 1 · answered Apr 29 '15 at 12:29

You get this problem because Chipmunk doesn't support CCD(Continuous Collision Detection). This can be solved(but as for me is not 100% guarantee) by use smaller time steps, but it uses more CPU time.

More info on official forum https://chipmunk-physics.net/forum/viewtopic.php?f=1&t=2149

Cocos2d Chipmunk physics issue

1 Answers1