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From: Alan Holding
Subject: Calling pre-defined textures with a concat generated string.
Date: 16 Jul 1999 16:11:43
Message: <378f91ff@news.povray.org>
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Hello.
Is it possible to use a concat generated string to call a pre-defined
texture?
In other words, why doesn't this code ...
// counter is a declared float in a loop with current value of 1
#declare vasetex = concat ( "T_Gold_", str(counter,1,0), "A")
texture { vasetex }
...let me call the texture T_Gold_1A, which is a pre-defined texture in the
file "golds.inc"?
I've trawled through the Help file but can't find any clarification.
Apologies if the answer is staring me in the face.
Thanks,
Alan.
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The problem is that vasetex is a string variable, not a directive. One
way to work around this is to make an array of the textures instead.
Another way would be to use the file directives to write the texture
string to a file, then include that file in the proper place.
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On Fri, 16 Jul 1999 21:10:16 +0100, "Alan Holding" <spe### [at] hotbot com>
wrote:
Hi Alan.
What you're trying to do is use a string constant where a texture
identifier should be used. This doesn't work. Recently I asked a
similar question and the general opinion was that it could be achieved
by adequate use of file input/output. Try this:
#declare vasetex = concat ( "T_Gold_", str(counter,1,0), "A")
#fopen F "tempfile.tmp" write
#write (F, vasetex)
#fclose F
object { Vase texture { include "tempfile.tmp" } }
POV is currently heavily rendering so I haven't tried this, but I'm
pretty certain it should work.
Peter Popov
ICQ: 15002700
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From: Alan Holding
Subject: Re: Calling pre-defined textures with a concat generated string.
Date: 16 Jul 1999 18:21:38
Message: <378fb072@news.povray.org>
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Hello, Peter.
Thanks to you and Chris Huff everything is working fine now! (Just had to
change the 'include' to '#include' in the code you supplied.)
I've now got five lovely shiny golden vases. And the potential to do all
kinds of crazy string manglin' madness!
Thanks again,
Alan.
--
http://www.specto.ukf.net/
Another pointless website.
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On Fri, 16 Jul 1999 23:21:28 +0100, "Alan Holding" <spe### [at] hotbotcom>
wrote:
>Hello, Peter.
>
>Thanks to you and Chris Huff everything is working fine now! (Just had to
>change the 'include' to '#include' in the code you supplied.)
<hides in a corner>
Puhleeease forgive my poor soul
<pulls out a pocket knife and commits sepuko>
Seriously, sorry about that. I either have to have more coffee when I
post or put a reminder somewhere that there's always the F7 key. Too
bad it does not help for POV code :(
>I've now got five lovely shiny golden vases. And the potential to do all
>kinds of crazy string manglin' madness!
When are we going to see them?
>Thanks again,
>Alan.
Anytime.
<runs spell checker before hitting 'send'>
<it coughs on 'sepuko' :)>
Peter Popov
ICQ: 15002700
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From: Alan Holding
Subject: Re: Calling pre-defined textures with a concat generated string.
Date: 17 Jul 1999 05:59:38
Message: <3790540a@news.povray.org>
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Peter Popov wrote in message
>When are we going to see them?
I've posted it to povray.binaries.images, though it's not that brilliant.
I'm still very new to POV-Ray and it's taking me a while to get my brain
round all the maths. ;->
The post in p.b.i. is called 5 Gold Vases - 1st image.
Thanks,
Alan.
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