Tree Collision Causes Objects To Bounce.

[AntonSynytsia]

Dynamic bodies bounce on tree collisions.
However, they don't bounce on convex collisions, that were set static (mass of zero).
Test:

• Set gravity to -100 and recompile:

  Code: Select all

  #define DEMO_GRAVITY  -100.0f  // PhysicsUtils.h, line 16

• Run Sandbox, and set solver model to exact (0).
• Select Multi Geometry Collision option.
• Turn on Show Contact Points

You will see objects bounce, or the drawn contact points blinking, which means object is bouncing.
Look at heightfield - you'll see objects bounce on them.
Look at the white static box in air - you'll see objects not bouncing.

The set solver model to zero, and the bouncing of objects on heightfield stops.

[AntonSynytsia]

I guess penetration of objects under high force is normal, but it's weird to see bodies penetrating on staticmesh collisions, and not pentetrating on static-convexhull collisions.