I've had problems with nested #while...#end loops in POV.  It will
execute the inner loop but not the outer.  My source is included, maybe
someone can hekp me with it.  Equivalent code in C++ using for loops
seems to work fine.  Are such constructs as I have simply illegal in POV
or am I just being stupid tonight?  I've tried rearranging the order of
the loops as well and either one will execute, or I will create a
neverending loop that sits and parses forever before I realize that one
of them never terminates.  Please help me!!

#declare a = 0;
#declare b = 0;
#declare layers = 3;
#declare sections = 12;

#while (a<layers+1)                                           // Outer
loop which only seems to execute the 1st iteration

   #while (b<sections+1)                      //
      <insert macro here>                      //  Inner loop which
seems
     #local b = b + 1;                            //   to execute
properly
   #end                                                //

#local a = a + 1;                                                //
Increment so the while statement will eventually be untrue
#end                                                                 //
End of outer loop #while statement

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Bah!!  Cursed Netscape mail program!  Here's the code; hope it's clearer
now:

#declare a = 0;
#declare b = 0;
#declare layers = 3;
#declare sections = 12;

#while (a<layers+1)
    #while (b<sections+1)
        <insert macro here>
        #local b = b + 1;
    #end
#local a = a + 1;
#end

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Note moved declaration of b below.  Is that what you need?
rc

"Richard Speir" <dai### [at] mindspringcom> wrote in message
news:38DADE7C.CFB725A1@mindspring.com...
> Bah!!  Cursed Netscape mail program!  Here's the code; hope it's clearer
> now:
>
> #declare a = 0;

/*  #declare b = 0;     <== removed this and moved down ...   */

> #declare layers = 3;
> #declare sections = 12;
>
> #while (a<layers+1)

      #declare b = 0;    /* ... to here.  */

>     #while (b<sections+1)
>         <insert macro here>
>         #local b = b + 1;
>     #end
> #local a = a + 1;
> #end

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Yes! That's it!!  Man, I was being stupid.  Thanks a lot.

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Oh, and another thing, did you mean to use "#local" instead of
"#declare" within the loops?  Someone else might shed some
light on whether that mix is expected to work here.

rc

"Robert Chaffe" <a0003738@airmail.net> wrote in message
news:38dadf04@news.povray.org...
> Note moved declaration of b below.  Is that what you need?
> rc
>
> "Richard Speir" <dai### [at] mindspringcom> wrote in message
> news:38DADE7C.CFB725A1@mindspring.com...
> > Bah!!  Cursed Netscape mail program!  Here's the code; hope it's clearer
> > now:
> >
> > #declare a = 0;
>
> /*  #declare b = 0;     <== removed this and moved down ...   */
>
> > #declare layers = 3;
> > #declare sections = 12;
> >
> > #while (a<layers+1)
>
>       #declare b = 0;    /* ... to here.  */
>
> >     #while (b<sections+1)
> >         <insert macro here>
> >         #local b = b + 1;
> >     #end
> > #local a = a + 1;
> > #end

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I do the same thing  every once in a while. It's embarrasing but at
least almost every single programmer has done it in the past, and some
of us post the code here so someone can point it out.

(I know this is true, because I've done it twice now)

Josh

Richard Speir wrote:

> Yes! That's it!!  Man, I was being stupid.  Thanks a lot.

--
Josh English
eng### [at] spiritonecom
"May your hopes, dreams, and plans not be destroyed by a few zeros."

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On Mon, 27 Mar 2000 12:08:11 -0800, Josh English
<eng### [at] spiritonecom> wrote:

>I do the same thing  every once in a while. It's embarrasing but at
                                     ^^^^^^

That should read #while :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG      e-mail : pet### [at] tagpovrayorg

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