[ODE] Sphere pass through box, mass problem

[Rodrigo Hernandez]

Use the ODE defined constant dEpsilon for epsilon, otherwise, you'll be 
introducing inconsistencies in the code.

J. Perkins wrote:

>On 11/14/05, Jon Watte (ODE) <hplus-ode at mindcontrol.org> wrote:
>  
>
>>The problem I had was a case where you (as an actor) could push yourself
>>into (and through) a box. The problem was that the case that was testing
>>for != 0 before dividing, when it really needs to test for < epsilon,
>>where epsilon is min-non-denormal-squared.
>>    
>>
>
>So the unit test case would be to place a sphere at a distance <
>epsilon from a box and let it run, correct? And I can deduce a value
>for epsilon from your code? Would probably be worthwhile to have
>similar cases for all primitives for points, edges, and faces.
>
>Jason
>
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