On 15.11.2006 17:39, Piotr Obrzut wrote:
> hi,
> 
>   I was wandering what should I find in "splat alpha map" (shader
>   variable that is used with terrain shaders)?
>   
>   I though that for given material with given index it returns 1 or 0
>   (according to index from material palette). Unfortunately it gives
>   different output for base and other materials (when from c++ both
>   are filled same), or at last something else have influence on the
>   output.
> 
>   Base shader have 'copy' mixmode  and second have 'add'. When I set the
>   output color of first shader with black color, I was expecting that
>   this sentence (SplatSampler is "splat alpha map"):
> 
>   float4 splat = tex2D(SplatSampler, In.vBaseTexCoords);
>   float4 OutputColor = splat;
>   return OutputColor;

Think about what the base map is: a single map used for the terrain
surface beyond the splatting distance. Hence a splat map does not make
sense for the base map: it doesn't have one.

-f.r.

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