UpdateGround

This update method is called by LateUpdate. It updates the ccol's physics material frictions and the jumpcooldown.

The ccol physics material update applies except if it's a npcdata of Pushrock. The staticFriction and dynamicFriction of the material are either set to 1.0 or 0.0 depending on specific conditions:

• If onground, the deltavelocity's magnitude is lower than 0.2 and jumpcooldown is expired
  • Then 1.0 is set to the friction unless the transform is the player's and the animstate isn't Walk and hitwall is false in which case, 0.0 is set to the friction values
• 0.0 is set to the friction values otherwise.

Finally, if the jumpcooldown is still active, it is decreased by framestep.