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It looks like a real bug this time, new to 3.6.beta4.win32, NOT present in
3.5.win32
Using interpolate 2 with density_file gives strange results.
Value 2 is invalid (should be 0 or 1).
Any other value Ive tested (3,4,5) results in no image at all.
Value 2 results in strange pixelized image (worse quality then without any
interpolation).
Code:
// bug found by Rafal Maj raf256.com
// strange effect when using illegal interpolate 2 for density file
// confirmed PRESENT in: PovRay 3.6.beta4.win32
// confirmed NOT in: PovRay 3.5.win32
// render with any options, i.e.: +w640 +h480 +a0.02 +am2 +ar2 +fn
box { 0, 1
pigment { color rgbt 1 }
interior {
media { emission 3
density { density_file df3 "spiral.df3"
interpolate 2 // <------- illegal, should be 0 or 1 !
}
}
}
hollow translate z*1-.5
}
image in .b-t.binaries
--
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics
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Program ended abnormally on 29/04/2004 21:08, Due to a catastrophic Rafal
'Raf256' Maj error:
> It looks like a real bug this time, new to 3.6.beta4.win32, NOT present in
> 3.5.win32
>
> Using interpolate 2 with density_file gives strange results.
> Value 2 is invalid (should be 0 or 1).
> Any other value Ive tested (3,4,5) results in no image at all.
>
> Value 2 results in strange pixelized image (worse quality then without any
> interpolation).
>
I disagree. This is quite an interesting effect! ;-)
--
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/* flabreque */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/* @ */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/* videotron.ca */}camera{orthographic location<6,1.25,-6>look_at a }
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fla### [at] videotron ca news:4091b3b5$1@news.povray.org
>> Value 2 results in strange pixelized image (worse quality then
>> without any interpolation).
(btw, and interpolate 2 is about x5 times slower then trilinear
interpolation!)
> I disagree. This is quite an interesting effect! ;-)
You work for microsoft, don't You ;) ?
--
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics
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In article <Xns94DB1FBCC42DAraf256com@203.29.75.35>, "Rafal 'Raf256' Maj"
<spa### [at] raf256com> wrote:
> Using interpolate 2 with density_file gives strange results.
> Value 2 is invalid (should be 0 or 1).
No, it is valid in 3.6 and should give you tricubic interpolation.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
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tho### [at] trfde news:4095ecd3@news.povray.org
> No, it is valid in 3.6 and should give you tricubic interpolation.
Oh, I didnt know that.
But - resuts of this interpolation are far worse then even without any
interpolation (see b-t.binaries), it produces some cell-like effect,m with
gives even more pixelized image then oryginal.
--
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics
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