"James" <hy5### [at] hanmailnet> wrote:
> Hi!
>
> With your help, I made program to draw spheres of 1000 in 3D box. But,I got
> error message (" Parse error: Expected 'numeric expression', Undeclared
> Identifier 'var1' found"). I could not fix this problem. Could you help me?

....

>  #fopen MyFile "position1.txt" read
>   #while (defined(MyFile))
>     #read (MyFile,Var1,Var2,Var3)
>
>     sphere {
>     <var1, var2, var3>, 1
>     texture {
>       pigment { color Yellow }
>       }
>     }
>
>   #end

....

Try <Var1, Var2, Var3> instead of <var1, var2, var3>.

Variable names are case sensitive.

--
Tor Olav
http://subcube.com

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