Node with convex mesh collider and rigid body disappearing after number of collisions

Cocos Creator
#1

Hello Devs,

Here’s my scenario…

  • Create a torus with mesh collider with checked convex flag. Disabled Z axis of linear velocity in rigid body.
  • A sphere collider in the middle of screen with static rigibody
  • Box collider boundaries so torus doesn’t go out of view area

here’s the video (skip to last 10 seconds) : physics bug - YouTube

I am moving the body in script on onTouch systemEvent like this,

 onTouch(touch,event)
    {
        let screenWidth = view.getViewportRect().width;
        let isRight = touch.getLocationX() > screenWidth/2;

        console.log(touch.getLocationX(),touch.getLocationY());

        if(!isRight)
            this.body.applyImpulse(this.leftImpulseDirection.multiplyScalar(this.impulseScalar),Vec3.ZERO);
        else
            this.body.applyImpulse(this.rightImpulseDirection.multiplyScalar(this.impulseScalar),Vec3.ZERO);
        
        let v = new Vec3();
        this.body.getLinearVelocity(v);
        v.x= clamp(v.x,-this.maxVelAllowed,this.maxVelAllowed);
        v.y= clamp(v.y,-this.maxVelAllowed,this.maxVelAllowed);
        v.z = 0;
        this.body.setLinearVelocity(v);
    }

I have debugged whatever I could. Checked all components, everything seems to be present. I also tried resetting the position and clearing all velocities.
Kindly help me with this blocker.

Thanks.

Node with mesh collider disappearing on colllsion
#2

Hi, could you give an reproduce demo?

#3

Hello Jiaxin,

Thanks for responding. Here’s the project :
https://drive.google.com/file/d/1q3zupDKLU6sjx-9DlanPGKM9ndYkzNs6/view?usp=sharing

Open it using cocos creator 3.2.

Thanks

#4

I tried many times and it was very difficult to reproduce this problem, and I couldn’t get a clear cause of the problem. But it seems that there is a division by zero, which may be the same as you set the position every time.

1 Like
#5

No problem. Thanks for your time man!! appreciated. I will create a new project. Hopefully it should work fine. I will update you guys if I find something. Thanks.