Yup the problem is solved by setting that flag.
Thank you guys for the help :)
Division and precision in c++
Quote:Original post by rip-off
I believe DirectX modifies the way the floating point processor works.
what the hell?!
I think Microsoft needs to get off their freaking power trip and back the f off
Quote:Original post by Funkymunky
what the hell?!
I think Microsoft needs to get off their freaking power trip and back the f off
I'm pretty sure they do it for a reason.
Quote:From msdn
D3DCREATE_FPU_PRESERVE
Forces Direct3D to not change the floating-point unit (FPU) control word, running the pipeline using the precision of the calling thread. Without this flag, Direct3D defaults to setting the FPU to single-precision round-to-nearest mode. Using this flag with the FPU in double-precision mode will reduce Direct3D performance.
Warning: Portions of Direct3D assume FPU exceptions are masked. Unmasking such exceptions may lead to undefined behavior.
So using the flag can have a performance hit and can lead to undefined behaviour. The reason they change the FPU mode seems to be for performance reasons so is more of a 'smart move' rather than 'power trip.'
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