//--- This #macro creates a simple color_map :

#macro BiColorMap (Coul1,Coul2,Seuil)
  color_map {
   [0 Coul1]
   [Seuil Coul1]
   [Seuil Coul2]
   [1 Coul2]
  }
#end

//--- I want to use it in a layered texture. This works as expected :

#declare T1 =  texture {
                   pigment {gradient x
                            BiColorMap (Clear,Gray50,.95)
                            scale 90}
                            }
#declare T2 =  texture {
                   pigment {gradient z
                            BiColorMap (Clear,Gray50,.9)
                            scale 90}
                            }

#declare T_Paves1 =
  texture {pigment {Gray80}}
  texture {T1}
  texture {T2}

//--- However, this causes an error :

#declare T_Paves2 =
  texture {pigment {Gray80}}
  texture {pigment {gradient x BiColorMap (Clear,Gray50,.05) scale 90}}
  texture {pigment {gradient z BiColorMap (Clear,Gray50,.05) scale 90}}

// it tells me : "Parse Error: No matching } in 'pigment',
                   macro identifier found instead"

Fabien.

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In article <3CC### [at] skynetbe> , Fabien Mosen 
<fab### [at] skynetbe>  wrote:

> // it tells me : "Parse Error: No matching } in 'pigment',
>                    macro identifier found instead"

It works as designed.  No macros in layered textures.  The problem is that if
a macro would contain a declare the parser could no longer guess that two or
more texture identifiers are supposed to belong to the layered texture and not
some other declare.

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

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Thorsten Froehlich wrote:
> 
> It works as designed.  No macros in layered textures.  The problem is that if
> a macro would contain a declare the parser could no longer guess that two or
> more texture identifiers are supposed to belong to the layered texture and not
> some other declare.

It would probably be good to mention this in the docs, for example as an


Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 20 Apr. 2002 _____./\/^>_*_<^\/\.______

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Thorsten Froehlich <tho### [at] trfde> wrote:
> It works as designed.  No macros in layered textures.  The problem is that if
> a macro would contain a declare the parser could no longer guess that two or
> more texture identifiers are supposed to belong to the layered texture and not
> some other declare.

  I propose a change in syntax for pov4. Layered textures should be inside
a clearly defined block, thus making it completely unambiguous to both the
parser and the user.
  It could be something as simple as:

texture
{ layered texture_map
  { (textures here)
  }
}

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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