[Bf-committers] optimising the code

[Arne Schmitz]

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Am Samstag, 29. Mai 2004 18:34 schrieb Jean-Luc Peuri=E8re:
> Blender structures use floats, so you must do float math
> when possible, which was the case before 2000 but is
> no more. Or switch all structures to use only doubles.
>
> Besides, SSE and Altivec code is float not double so if we
> either use those, that's the right road.

Plus double means also double memory and bandwidth requirements. And this c=
an=20
mean *a lot* for large scenes, or many operations. Rendering a scene with ~=
1=20
Mio vertices takes up twice as much in memory for the scene description whe=
n=20
using doubles and also needs twice as much bandwidth for loading and storin=
g=20
of the FPU registers.

Arne

=2D-=20
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