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I've put Samuel Benge's Isosurface Tutorial on line with a few minor
amendments.
http://www.zeropps.uklinux.net/isotut/
And a zipped copy for download should you want it:
http://www.zeropps.uklinux.net/isotut/isotut.zip (168K)
In the near future I hope to do a 3.5 compliant update and add some more
depth to Samuel's tutorial which has served us so well over the years.
--
%HAV-A-NICEDAY email mailto:ste### [at] zeropps uklinuxnet
Steve web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
6:07pm up 27 days, 14:49, 1 user, load average: 1.05, 1.02, 1.00
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On 16 May 2002 13:11:12 -0400, Steve <ste### [at] zeroppsuklinuxnet> wrote:
> I've put Samuel Benge's Isosurface Tutorial on line with a few minor
> amendments.
>
> http://www.zeropps.uklinux.net/isotut/
failed image http://www.zeropps.uklinux.net/isotut/iso0.gif in
http://www.zeropps.uklinux.net/isotut/iso_tutorial1.html
ABX
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> On 16 May 2002 13:11:12 -0400, Steve <ste### [at] zeroppsuklinuxnet> wrote:
>> I've put Samuel Benge's Isosurface Tutorial on line with a few minor
>> amendments.
>>
>> http://www.zeropps.uklinux.net/isotut/
>
> failed image http://www.zeropps.uklinux.net/isotut/iso0.gif in
> http://www.zeropps.uklinux.net/isotut/iso_tutorial1.html
>
> ABX
Yes that one was missing from the set I received.
--
sphere{z*5,1pigment{rgb.5}finish{reflection.3specular.5}}box{<-50,-3,-50>
<50,-2,50>pigment{checker/*\__\\__/ * \_\\__*/scale 2}finish{ambient.7}}
light_source/*__\\__\\__\\__\\__\( ~ )\__\\__\\__\\__\\*/{<2,5,1>*4,1}
/*\\__\\__\\__\\__\\__\\__\\__\\__\~ -/__\\__\\__\\__\\__\\*//* Steve */
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On 16 May 2002 18:43:55 -0400 Steve wrote:
>Yes that one was missing from the set I received.
I checked my archive and I don't have iso0.gif, either, Steve.
--
Alan
ako### [at] povrayorg
a k o n g <at> p o v r a y <dot> o r g
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On Thu, 16 May 2002 19:26:39 -0700, Alan Kong wrote:
> On 16 May 2002 18:43:55 -0400 Steve wrote:
>
>>Yes that one was missing from the set I received.
>
> I checked my archive and I don't have iso0.gif, either, Steve.
>
Christof has now sent me the file and I'll add it some time today.
Thanks to all who helped.
--
sphere{z*5,1pigment{rgb.5}finish{reflection.3specular.5}}box{<-50,-3,-50>
<50,-2,50>pigment{checker/*\__\\__/ * \_\\__*/scale 2}finish{ambient.7}}
light_source/*__\\__\\__\\__\\__\( ~ )\__\\__\\__\\__\\*/{<2,5,1>*4,1}
/*\\__\\__\\__\\__\\__\\__\\__\\__\~ -/__\\__\\__\\__\\__\\*//* Steve */
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From: Lieut Data
Subject: Re: Samuel Benge's Isosurface tutorial back online.
Date: 21 May 2002 13:07:58
Message: <3cea7eee$1@news.povray.org>
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New to isosurfaces here, great tutorial... one question, (in Povray 3.5),
why does this source code render the side of the iso with a weird effect?
(It seems dependant on the position of the camera... )
#include "textures.inc"
#include "colors.inc"
camera {location <2, 2, -5> look_at <0, 0, 0>}
light_source {<-5, 3, -6> 1}
light_source {<5, 3, -6> 1}
isosurface{
function{ x+y-z }
threshold 1
contained_by{ box{ <-1,-1,-1>,<1,1,1> } }
texture {pigment {rgb<1, .5, .3>}}
}
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Wasn't it Lieut_Data who wrote:
>New to isosurfaces here, great tutorial... one question, (in Povray 3.5),
>why does this source code render the side of the iso with a weird effect?
>(It seems dependant on the position of the camera... )
>
>#include "textures.inc"
>#include "colors.inc"
>
>camera {location <2, 2, -5> look_at <0, 0, 0>}
>
>light_source {<-5, 3, -6> 1}
>light_source {<5, 3, -6> 1}
>
>isosurface{
> function{ x+y-z }
> threshold 1
> contained_by{ box{ <-1,-1,-1>,<1,1,1> } }
>
> texture {pigment {rgb<1, .5, .3>}}
>}
Read the warning message that you get in the message window. It says
that you may have holes since you have set max_gradient too low. That
weird is the holes.
In MegaPOV you could often get away with using the default value for
max_gradient, but in POV 3.5 you nearly always need to set a higher
value.
--
Mike Williams
Gentleman of Leisure
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From: Lieut Data
Subject: Re: Samuel Benge's Isosurface tutorial back online.
Date: 21 May 2002 16:20:00
Message: <3ceaabf0@news.povray.org>
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> Read the warning message that you get in the message window. It says
> that you may have holes since you have set max_gradient too low. That
> weird is the holes.
>
> In MegaPOV you could often get away with using the default value for
> max_gradient, but in POV 3.5 you nearly always need to set a higher
> value.
Voila! Thanx
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