Am 16.01.2014 12:26, schrieb Simulator:
> I use a visualization software that generates pov ray files. I have the
> following declared
>
> #declare VertGlyph = object { sphere {<0,0,0>,1} };

You should better make this a macro, otherwise it won't work with blobs. 
(The "sphere" statements in blobs aren't objects proper.)

E.g.:

#macro VertGlyph(Radius,Pos)
   sphere { Pos, Radius, strength 1.0 }
#end

> #declare vertex_geometry = union
> {
> #declare vertctr=0;
> #while (vertctr < nverts0000)
> #declare vertvalue=ptscalars[verts[vertctr][1]];
>        object {
>          VertGlyph
>          scale VertScaleFunction(vertvalue)
>          translate pts[verts[vertctr][1]]
>        }
> #declare vertctr = vertctr+1;
> #end
> };

You should then be able to modify the vertex_geometry as follows:

#declare vertex_geometry = blob
{
#declare vertctr=0;
#while (vertctr < nverts0000)
#declare vertvalue=ptscalars[verts[vertctr][1]];
          VertGlyph(
            VertScaleFunction(vertvalue),
            pts[verts[vertctr][1]]
        )
#declare vertctr = vertctr+1;
#end
};

(BTW, POV-Ray now supports a #for statement that makes counted loops 
easier.)

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