Visualize bouncing ball trajectory

Hello,

I followed this tutorial/code to create a visualization preview of a projectile. http://wiki.unity3d.com/index.php/Trajectory_Simulation (C#)
As it is mentioned in the link, this will only work correctly with full bounciness (1) and no friction (0) on the colliding objects. However, my physics aren't that good to calculate the new velocity after a bounce where the friction is not 0.

How do I calculate the correct new velocity of the projectile after bouncing?

Thanks for your time.

 

With the new physics upgrade, we can use multi-scene simulations to do this. They posted a video of this in action in this blog post, but I don't see where that code is. If anyone knows, please reply

 

Yea im searching for it as well.