3D Physics Material Combine Friction/Bounce in 2D Physics?

In the 3D physics materials, there's a way to combine the influence of friction and bounciness between colliding objects in four key ways:

- Average :: The two friction values are averaged.
- Minimum:: The smallest of the two values is used.
- Maximum: The largest of the two values is used.
- Multiply :: The friction values are multiplied with each other.

Is there any way to do this with 2D physics materials?

 

THANK YOU for this succinct, forthright and precise answer. I'll roll-my-own for now, and look forward to this in the future.

again... THANK YOU!!!

Btw, thank you, as a whole, for what you've done (and doing) with 2D physics. You and your focus on 2D and physics are a good portion of why I've chosen to use Unity.

 

What's it on, for friction, at the moment?

It feels like it's multiply, but capped at a maximum of 1.0

 

And bounce seems to be on Maximum. But I'm just going off feel. I could be wrong.

 

THANK YOU!!!

This makes a LOT of sense:

Code (CSharp):

1. /// Friction mixing law. The idea is to allow either fixture to drive the friction to zero.
2. /// For example, anything slides on ice.
3. inline float32 b2MixFriction(float32 friction1, float32 friction2)
4. {
5.     return b2Sqrt(friction1 * friction2);
6. }
7.  
8. /////////////
9. #define    b2Sqrt(x)    sqrtf(x)

 

Any news on that? I don't see it in the 2018.3b Release Notes.

 

Not to beat a horse that's been dead for several years now, but has this idea been scrapped? Seems to still be unavailable as of 2023.2.

Would definitely be a useful feature. I'm surprised it wasn't done this way by default given how useful it is with PhysX.

Does Unity allow a way to directly edit the Box2D code?