Re: [PATCH 1/4] wined3d: Handle fog_start == fog_end with table fog

[Henri Verbeet]

On 14 June 2013 22:34, Stefan Dösinger  wrote:
> -
>                {
> -
>                    float increase = eps;
> -
>                    volatile float fogend2 = fogend;
> -
>                    do
> -
>                    {
> -
>                        fogend2 += increase;
> -
>                        increase *= 2.0f;
> -
>                    }
> -
>                    while (fogstart == fogend2);
> -
>                    fogend = fogend2;
> -
>                }

Why is this needed? When end == start I'd expect (end - c) / (end -
start) to evaluate to +/-INF, and then get clamped to [0, 1], which is
pretty much what you'd want. In my (very limited) testing, that's also
what actually happens with at least the GLSL backend.