Rigid bodies "sinking" in each other

[tower120]

Two rigid bodies does not collide as expected. See attached project file. Version 2.12.0.2

temp.zip

Edited August 25, 2020 by tower120

[david.cambre]

Are you using box collision shapes?

try adding using box and 4 spheres

[tower120]

Yes, I'm using box collision shapes. Why "box and 4 spheres" should help?

[david.cambre]

I had a similar problem

The spheres give continues collision detection

https://developer.unigine.com/en/docs/2.12/principles/physics/collision/?rlang=cpp#discrete_continuous

https://developer.unigine.com/en/docs/2.12/principles/physics/shapes/?rlang=cpp#sphere

[tower120]

CCD (continues collision detection) should not be necessary in this current case.

Object velocity is low, and collided objects are big enough to prevent tunneling.

And it is clearly visible that boxes does interact with each other.

Edited August 26, 2020 by tower120

[david.cambre]

I think it is due to the speed of gravity

[silent]

tower120

Thank you for the test scene!

We've successfully reproduced this behavior in 2.12.x. It's a bug in the physics calculation when Immovable option enabled in Body settings. Right now there is no way to make physics work correctly with Immovable objects. We will fix this in the upcoming SDK update.

 

[tower120]

Thanks. I'll look forward to that!