[ODE] ODE behaving differently for different renderers

Jon Watte (ODE) hplus-ode at mindcontrol.org
Thu Feb 22 10:12:27 MST 2007

Note that DirectX will change the floating point flags of the FPU. You 
should use _control87 or something similar to make sure you set the 
precision and rounding mode you expect.


          / h+

PKS123 wrote:
> Hi
> I re-created the whole thing from scratch.
> But I ensured that the order in which the things are done, and the values of
> the various parameters remain unchanged. So, its essentially using the same
> code with a different renderer.
> You are right in saying that the problem may be due to use of DirectX as
> opposed to OpenGL used in the test_buggy demo. I am using Gamebryo 1.2 which
> is an API built over DirectX.
> Could you let me know what you may suspect to be the problem in case of
> using DirectX. As far as I understand, as long as the Physics worlds are
> identical, the rendered worlds should behave the same way. And that what
> baffles me.
> Thanks and Regards
> Prashant

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