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Another old source...
Find it at povray.text.scene-files:
Different Results Between Versions, Dave Blandston, 07.08.2009
The resulting image doesn't look right to me. What do you think?
Any confirmations?
povray -- version
POV-Ray 3.7.2-alpha.unofficial
This is an unofficial version compiled by:
ThH <no.spam@address>
The POV-Ray Team is not responsible for supporting this version.
Copyright 1991-2017 Persistence of Vision Raytracer Pty. Ltd.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Built-in features:
I/O restrictions: enabled
X Window display: enabled (using SDL)
Supported image formats: gif tga iff ppm pgm hdr png jpeg tiff openexr
Unsupported image formats: -
Compilation settings:
Build architecture: x86_64-unknown-linux-gnu
Built/Optimized for: x86_64-unknown-linux-gnu (using -march=native)
Compiler vendor: gnu
Compiler version: g++ 4.9.2
Compiler flags: -pipe -Wno-multichar -Wno-write-strings
-fno-enforce-eh-specs -Wno-non-template-friend -s -O3 -ffast-math
-march=native -pthread
--
Thorsten aka ThH
Post a reply to this message
Attachments:
Download 'dokken.png' (55 KB)
Preview of image 'dokken.png'
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ThH <no.spam@address> wrote:
> Another old source...
>
> Find it at povray.text.scene-files:
> Different Results Between Versions, Dave Blandston, 07.08.2009
>
> The resulting image doesn't look right to me. What do you think?
>
On Windows 7 (64-bit), I get the same visual results as you (after changing
Dave's assumed_gamma 2.0 to 1.0). I ran two versions of POV-Ray: one of the
latest development builds (8927145) , and the latest 3.7.1-beta 2 version.
Unfortunately, I don't know what Dave's original scene is supposed to look like,
as a comparison (or what POV-Ray version he originally wrote it with) :-( The
render does look kind of odd, though, with those "spiky" things jutting out.
As a side note: When I first ran Dave's scene, BOTH POV-Ray versions I used
actually CRASHED. The culprit was his use of
charset utf8
in his global_settings block. Without that, the scene runs OK. I think this
particular problem has recently been mentioned in the newsgroups, re:
the 3.7.1 beta 2 release. But I was surprised that the same crash happened with
the earlier development build.
Post a reply to this message
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Le 17-02-05 à 03:29, ThH a écrit :
> Another old source...
>
> Find it at povray.text.scene-files:
> Different Results Between Versions, Dave Blandston, 07.08.2009
>
> The resulting image doesn't look right to me. What do you think?
>
> Any confirmations?
>
> povray -- version
>
> POV-Ray 3.7.2-alpha.unofficial
>
> This is an unofficial version compiled by:
> ThH <no.spam@address>
> The POV-Ray Team is not responsible for supporting this version.
>
> Copyright 1991-2017 Persistence of Vision Raytracer Pty. Ltd.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> Built-in features:
> I/O restrictions: enabled
> X Window display: enabled (using SDL)
> Supported image formats: gif tga iff ppm pgm hdr png jpeg tiff openexr
> Unsupported image formats: -
>
> Compilation settings:
> Build architecture: x86_64-unknown-linux-gnu
> Built/Optimized for: x86_64-unknown-linux-gnu (using -march=native)
> Compiler vendor: gnu
> Compiler version: g++ 4.9.2
> Compiler flags: -pipe -Wno-multichar -Wno-write-strings
> -fno-enforce-eh-specs -Wno-non-template-friend -s -O3 -ffast-math
> -march=native -pthread
>
> --
> Thorsten aka ThH
Utherly broken !
All the parts jutting out from «Dokken» should NOT be there at all. The
original render did not have those.
Alain
Post a reply to this message
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"Kenneth" <kdw### [at] gmail com> wrote:
>
> Unfortunately, I don't know what Dave's original scene is supposed to look like,
> as a comparison (or what POV-Ray version he originally wrote it with)
Oops, Dave did mention the versions he used-- 3.6.1a vs 3.6.2. Right now, I
don't have either older version installed, to further test the scene.
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On 02/05/2017 03:29 AM, ThH wrote:
> Another old source...
>
> Find it at povray.text.scene-files:
> Different Results Between Versions, Dave Blandston, 07.08.2009
>
> The resulting image doesn't look right to me. What do you think?
>
> Any confirmations?
>
In his post Dave wrote: "This is my source for the Dokken logo. It
renders fine with version 3.6.1a but does not render correctly with
version 3.6.2."
On Ubuntu 16.04 linux I get the 'not-right' result with all my versions
back through 3.5 which includes a version of 3.6.1.
It looks like the root of the problem is the following two values being
set the same in Dokken.pov:
#local CornerRadius = .02;
#local EdgeRadius = CornerRadius;
which results in zero cylinder-radius, torus-major-radius(1) values in:
#macro BeveledCylinder (Top, Bottom, Radius, EdgeRadius)
union {
cylinder {<Top.x, Top.y, Top.z + EdgeRadius>, Bottom, Radius}
cylinder {Top, Bottom, Radius - EdgeRadius}
torus {
Radius - EdgeRadius, EdgeRadius
rotate 90 * x
translate <Top.x, Top.y, Top.z + EdgeRadius>
sturm
} //torus
} //union
#end //#macro BeveledCylinder
Using something like:
#local CornerRadius = .02;
#local EdgeRadius = CornerRadius/2;
works OK for me.
Bill P.
(1) - New 3.7.1 spindle torus features allow the minor radius to
self-intersect for various results, but it's not the right 'fix' here.
Post a reply to this message
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