Am 16.11.2012 09:47, schrieb Bruno Cabasson:
> Let me put it differently. Since today's GPUs' native format is single
> precision, which is much faster than their emulated double precision (AFAIK),
> and if POV-Ray were to use GPU or hardware-accelrated computing (one day ...,
> see a recent post on the subject), I was curious to know where double precision
> is really necessary.
>
Contemporary GPU's have native support for 64bit floating point 
precession (nothing 'emulated') and believe me, 64bit versus 32bit is 
the very least of your problems when it comes to porting POV-Ray to the GPU.
I've done that already with a brutally stripped down version of POV-Ray 
(actually McPOV, but is now closer to DKB-Trace Version 1.0 as it is to 
POV-Ray) and OpenCL.

-Ive

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