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Perhaps, if I understand what you're trying...
Can you have the first element of the CSV file be the number of tiles? Then
you can #read the first element into a viariable and delcare an array for
your tiles. There is no way to dynamically change the name of a variable,
i.e. #declare Tile####.
#declare Tiles=array[number_of_tiles];
Then you can iterate through a loop that #reads all the subsequent values
and defines the next tile in your array.
#delcare Tiles[loop_counter]=prism { ... }
No doubt you've studied up on the file directives in the docs...;-)
"Timothy R. Cook" <tim### [at] scifi-fantasy com> wrote in message
news:3dfb06ab$1@news.povray.org...
> I have an unspecified number of linear_spline prisms with unspecified
> number of control points and unspecified colour. Code for an individual
> prism looks like
>
> #declare Tile#### = prism{
> linear_sweep
> linear_spline -1.0, 0.0
> cp
> <x1, y1>,
> ..
> <xn, yn>
> rotate -x*90
> material{
> texture{
> pigment{ color rgbt<RRR, GGG, BBB, 0.5> }
> normal{ granite , 1.0 turbulence 1.0 ramp_wave }
> finish{ ambient 0.1 phong 1.0 phong_size 20.0 specular 1.0 }
> }
> interior{
> ior 2.0
> caustics 1.0
> media{
> intervals 1
> confidence 0.0001
> variance 1.0/1.0
> ratio 0.5
> emission rgb <RRR, GGG, BBB>
> scattering{ 5, rgb <0.2, 0.2, 0.2> eccentricity 0.0 }
> }
> }
> }
> hollow
> photons{ collect off }
> }
>
> where RRR, GGG, BBB are the red, green and blue values, cp the
> number of control points, and Tile#### the prism in question.
> I started doing the whole thing by hand in Moray, but I realised
> that this is something that I ought to be able to do with a
> fairly simple POV script. I'd already started putting the colours
> for the tiles into a CSV file (20 tiles so far).
>
> The question is: how do I go about reading the appropriate elements
> of the CSV into the appropriate variables in the prism object? I
> reckon I can figure out how to repeat it myself once I know how to
> do one, but my programming experience doesn't include messing with
> data files.
>
> For reference, CSV would look like
>
> Tile####,RRR,GGG,BBB,rrr,ggg,bbb,p, x1, y1, x2, y2, x3, y3, x4, y4
> Tile0001,128,128,128,0.5,0.5,0.5,4,0.0,0.0,1.0,0.0,1.0,1.0,0.0,1.0
> ...
> Tile0020,128,128,128,0.5,0.5,0.5,4,2.0,0.0,3.0,0.0,3.0,1.0,2.0,1.0
> EOF
>
> (probably can ditch the rrr, ggg, bbb values since I can do maths
> inside POV, and they're RRR, GGG, and BBB divided by 255)
> --
> Tim Cook
> http://empyrean.scifi-fantasy.com
>
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