how to entirely prevent bounce

Question

I would like to create a high (50-100+) cube tower that the player can knock down. The tower is made of 1x1x1 cubes resting on a 1000x,1y,1000z flattened cube object positioned at 0,0,0 that has a collider and no rigidbody. The cubes have a physics material that is set as follows:

dynamic: 1 static: infinity bounciness: 0 friction combine: maximum bounce combine: minimum and other settings at default

The only physics setting I modified is to set bounce threshold to 1000.

A script spawns a stack of cubes at a height offset equal to .99 they should spawn exactly stacked counting penetration.

With this configuration any stack larger than around 12 never rests and eventually vibrates off of itself.

To confirm excess bounce was the issue I froze all rotation and froze x and z position.

With the frozen properties stacks of as high as 50 (maybe more) eventually come to rest. After the scene starts you can see the stack move up and down in the y direction even though it shouldn't, and you can also see a couple of cubes at the top "pop" when they first spawn.

The final resting Y position of the bottom cube is 0.9789241 (varies slightly).

My question is what settings can I use to instantly have my tower a "natural" position when the scene first starts and ready for player interaction?

Answer 1

Answer by uanmanarmy · Jul 31, 2014 at 10:31 AM

pragma strict

function FixedUpdate() { var currentVelocity = rigidbody.velocity;

     if (currentVelocity.y <= 0f) 
         return;
      
     currentVelocity.y = 0f;
      
     rigidbody.velocity = currentVelocity;

}

attach this script to the objects

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how to entirely prevent bounce

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pragma strict

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