Tim Attwood nous apporta ses lumieres en ce 22/09/2006 04:35:
> The problem is in the spotlight definition...

> Although it is legal to put "translate" before the spotlight terms, it
> confuses the parser. This is similar to placing "spotlight" after the
> spotlight terms, which is legal, but causes the light to act as a point-
> light.

> This light works fine, but this is still a parsing bug...

> light_source {
>   0*x
>   color <1,0,0>
>   spotlight // before all spot terms
>   point_at <0,0,0>
>   radius 7
>   tightness 10
>   falloff 9
>   translate <-36, 36, -36> // after all light terms
> }

Not good! Now the light is placed at <-36,36,-36> and point_at <-36,36,-36>, and 
it don't light the scene any more. The traslate at the end apply to ALL 
coordinates: location AND point_at. A rotate or scale at the same place would 
also apply to both location and point_at.
Placing the light at <-36,36,-36> and removing the translate and the problem is 
still there.

-- 
Alain
-------------------------------------------------
Grandchildren are God's reward for not killing your own.

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