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Greetings ;> Can anyone help me please - ( POVray 3.00e, Pentium PC
system)
In order to create a number of intertwined same-axis spirals, I think I
need to be able to call a small block of POV script several times from
within the same file if possible. What's the closest I can get to an old
'GOSUB'-type or PROC command?
The BBC BASIC equivalent of what I want to do would be:
---------------------------
FOR i = 1 to 4
PROC spiral
NEXT i
END
DEF PROC spiral
{define a 3d spiral here, properties of which depend on value of i. Code
contains loops, #define's, etc. as well as shape commands}
ENDPROC
---------------------------
So, how can I do this? I thought of #declaring the spiral routine first
and then calling it a few times later, but it won't let me include other
logic & directives with shape commands, apparently. Help!
Best wishes to you all
Matt Rhys-Roberts
North Wales
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You want the #macro directive and the #while directive
#macro ThisIsAMacro(aParameter, anotherParameter)
blahblah
#end//end of macro
#declare counterA = 0;
#while(counterA < 15)
ThisIsAMacro(counterA, < 0, 4, 2>)
#declare counterA = counterA + 1;
#end//end of while loop
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Oh, I just saw the version of POV-Ray you are using. You should upgrade
to 3.1g, the latest version.
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Thanks Chris: that's the fastest response I've ever had to a news-type
question!
I'll save up my phone money to download the latest version, and then try
out the #macro command.
Cheers
Matt.
Chris Huff wrote:
> Oh, I just saw the version of POV-Ray you are using. You should upgrade
> to 3.1g, the latest version.
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Matt wrote:
>
> Greetings ;> Can anyone help me please - ( POVray 3.00e, Pentium PC
> system)
>
> In order to create a number of intertwined same-axis spirals, I think I
> need to be able to call a small block of POV script several times from
> within the same file if possible. What's the closest I can get to an old
> 'GOSUB'-type or PROC command?
>
> The BBC BASIC equivalent of what I want to do would be:
> ---------------------------
> FOR i = 1 to 4
> PROC spiral
> NEXT i
> END
>
> DEF PROC spiral
> {define a 3d spiral here, properties of which depend on value of i. Code
> contains loops, #define's, etc. as well as shape commands}
> ENDPROC
> ---------------------------
> So, how can I do this? I thought of #declaring the spiral routine first
> and then calling it a few times later, but it won't let me include other
> logic & directives with shape commands, apparently. Help!
>
> Best wishes to you all
>
> Matt Rhys-Roberts
> North Wales
Hi Matt!
In 3.0 you still could #include the same include file with different
declarations (see my gear include file example
http://www.ica.uni-stuttgart.de/~marc/gearex.htm ).
Macros are better! :-)
Marc
--
Marc Schimmler
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From: Bob Hughes
Subject: Re: How can I iterate a function in POV script?
Date: 22 Jul 1999 13:25:03
Message: <379753BF.945B8F03@aol.com>
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The #while loop alone should work out okay. Just exampling below:
#declare S1 = 0 //use as many as you need of these to use on Spiral
#declare S2 = 1 //etcetera
#declare C = 0
#while (Count < 9) //same as FOR i = 1 to 9
//put Spiral code here or use the inc file, with all the loop
manipulated parts
#declare S3 = S1+C //whatever.
#declare C = C + 1 //or whatever. clock based value, anything...reaching
9
#include "Spiral.inc" //alternatively use this
#end //NEXT until loop reaches 9
Matt wrote:
>
> Greetings ;> Can anyone help me please - ( POVray 3.00e, Pentium PC
> system)
>
> In order to create a number of intertwined same-axis spirals, I think I
> need to be able to call a small block of POV script several times from
> within the same file if possible. What's the closest I can get to an old
> 'GOSUB'-type or PROC command?
>
> The BBC BASIC equivalent of what I want to do would be:
> ---------------------------
> FOR i = 1 to 4
> PROC spiral
> NEXT i
> END
>
> DEF PROC spiral
> {define a 3d spiral here, properties of which depend on value of i. Code
> contains loops, #define's, etc. as well as shape commands}
> ENDPROC
> ---------------------------
> So, how can I do this? I thought of #declaring the spiral routine first
> and then calling it a few times later, but it won't let me include other
> logic & directives with shape commands, apparently. Help!
>
> Best wishes to you all
>
> Matt Rhys-Roberts
> North Wales
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/homepage.htm
mailto://inversez@aol.com?Subject=PoV-News
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Matt wrote:
> The BBC BASIC equivalent of what I want to do would be:
> ---------------------------
> FOR i = 1 to 4
> PROC spiral
> NEXT i
> END
WHILE loop is used. The increment has to be stated. Very C like.
Post a reply to this message
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