Hi Mike,

And using more than two colors?

I was reading the documentation about that. They say that:
"When the gradient x function returns values from 0.0 to 0.3 the red 
highlighted texture is used. From 0.3 to 0.6 the texture identifier T_Wood11 
is used. From 0.6 up to 0.9 a blend of T_Wood11 and a shiny DMFWood4 is 
used. From 0.9 on up only the shiny wood is used."

I thought that number is used to divide the object in different parts, for 
exemple if your are using 3 colors you can put 1/3 before the pigment 
instead of the 1/2 that you've put the divide the object. But I obtain some 
strange results.

======================================
texture {gradient x
 texture_map {[0.3  pigment {rgb <0,0,1>}]
               [0.6  pigment {rgb <1,0,0>}]
              [0.9 pigment { rgb <0, 1, 0>}] }
  //translate <-0.5,0,0>   // move transition point to the origin
  scale 100              // scale up the texture_map
  translate <0.95/2,0,0> // move the transition point to half way
======================================

Well, I'm not understanding it properly.

Thanks for the anwers,
Oleguer



news:dCr### [at] econymdemoncouk...
> Wasn't it Oleguer Vilella who wrote:
>>Hi again,
>>
>>Using this function:
>>======================================
>>#declare Blobs = function { f_blob2(x, y, z, 0.95, 4, 1.8, 1) }
>>isosurface {
>>function { Blobs(x, y, z) }
>>max_gradient 6
>>contained_by { sphere { 0, 9 } }
>>scale 2
>>rotate 75*y
>>translate <0, 0, 0>
>>pigment { color Blue }
>>}
>>======================================
>>I've here two blobs situated along the y axis. Is it anyway to give a
>>texture to the first and then giving another texture and color to the 
>>other
>>using the function?
>
> You can't do it from the function itself, because the function only
> thinks of the whole shape as a single primitive object. It doesn't know
> that the resulting shape is going to look like two blobs.
>
> What you can do, is to use a texture_map to apply different textures, or
> a pigment_map to apply different pigments to chosen regions of the
> surface, like this:
>
> (The "0.95/2" I used is calculated to be half way to the blob separation
> "0.95" specified in the first line.)
>
> #declare Blobs = function { f_blob2(x, y, z, 0.95, 4, 1.8, 1) }
> isosurface {
> function { Blobs(x, y, z) }
> max_gradient 6
> contained_by { sphere { 0, 9 } }
> texture{gradient x
>  texture_map {[0.5  pigment {rgb <0,0,1>}]
>               [0.5  pigment {rgb <1,0,0>}]}
>  translate <-0.5,0,0>   // move transition point to the origin
>  scale 100              // scale up the texture_map
>  translate <0.95/2,0,0> // move the transition point to half way
>  }
> scale 2
> rotate 75*y
> translate <0, 0, 0>
> }
>
>
> Or
>
> pigment {gradient x
>  pigment_map {[0.5  rgb <0,0,1>]
>               [0.5  rgb <1,0,0>]}
>  translate <-0.5,0,0>   // move transition point to the origin
>  scale 100              // scale up the texture_map
>  translate <0.95/2,0,0> // move the transition point to half way
>  }
>
> -- 
> Mike Williams
> Gentleman of Leisure

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