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I got very strange things going on when rendering the following scene:
torus { 1, 1 translate y*(1/0)/(1/0) }
Some versions of POV-Ray definitely hang over here (even with +w1 +h1).
Here's what I noticed:
Linux:
3.6.1 official binary: hangs
3.6.1 self-compiled: does not hang
3.5 self-compiled: does not hang
MegaPOV 1.1 compiled by Chris Hormann: hangs
Windows:
3.6.1 official binary: does not hang
3.7.0.beta.4.icl8.win32: does not hang
Linux tests were done by me on a Gentoo Linux, Kernel 2.6.11, AMD Athlon
XP 2600+, 1 GB RAM.
Windows tests were done by Lance Birch on a Win2000 Pro, Dual Athlon MPs.
This is either a issue with the official Linux binaries or with my setup
over here. I'd therefore be glad if anyone using Linux could render the
scene himself and post the results.
BTW: I do no that this translation does not make sense :) But I figured
if POV-Ray allows me to use inf and nan values, it should not hang on
them...
Florian
--
camera{look_at-y*10location<8,-3,-8>*10}#local a=0;#while(a<999)sphere{
#local _=.01*a-4.99;#local p=a*.01-5;#local c=.01*a-4.995;<sin(p*pi)*5p
*10pow(p,5)*.01>sin(c*c*c*.1)+1pigment{rgb 3}}#local a=a+1;#end
/******** http://www.torfbold.com ******** http://www.imp.org ********/
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From: Nicolas Calimet
Subject: Re: POV-Ray hangs when using invalid numbers
Date: 18 May 2005 14:35:26
Message: <428b8aee@news.povray.org>
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> 3.6.1 official binary: hangs
Confirmed.
> 3.6.1 self-compiled: does not hang
> Linux tests were done by me on a Gentoo Linux, Kernel 2.6.11
Which compiler and version are you using? I seem to have such a
problem with various compiles produced with gcc-3.4.x but _not_ with older
versions (namely 2.95.3 and 3.3.4), gcc-4.0.0, or icc 8.x. FYI the official
povray binary was compiled with gcc-3.4.1, which seems faulty here.
- NC
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From: Florian Brucker
Subject: Re: POV-Ray hangs when using invalid numbers
Date: 18 May 2005 14:42:32
Message: <428b8c98$1@news.povray.org>
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>> 3.6.1 official binary: hangs
>
> Confirmed.
OK.
> Which compiler and version are you using?
$ gcc -v
Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5-20050130/specs
Configured with:
/var/tmp/portage/gcc-3.3.5.20050130-r1/work/gcc-3.3.5/configure
--enable-version-specific-runtime-libs --prefix=/usr
--bindir=/usr/i686-pc-linux-gnu/gcc-bin/3.3.5-20050130
--includedir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5-20050130/include
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5-20050130
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5-20050130/man
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5-20050130/info
--with-gxx-include-dir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5-20050130/include/g++-v3
--host=i686-pc-linux-gnu --disable-altivec --enable-nls
--without-included-gettext --with-system-zlib --disable-checking
--disable-werror --disable-libunwind-exceptions --disable-multilib
--disable-libgcj --enable-languages=c,c++,f77 --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 3.3.5-20050130 (Gentoo Linux 3.3.5.20050130-r1,
ssp-3.3.5.20050130-1, pie-8.7.7.1)
HTH,
Florian
--
camera{look_at-y*10location<8,-3,-8>*10}#local a=0;#while(a<999)sphere{
#local _=.01*a-4.99;#local p=a*.01-5;#local c=.01*a-4.995;<sin(p*pi)*5p
*10pow(p,5)*.01>sin(c*c*c*.1)+1pigment{rgb 3}}#local a=a+1;#end
/******** http://www.torfbold.com ******** http://www.imp.org ********/
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Florian Brucker nous apporta ses lumieres en ce 2005-05-18 20:02:
> I got very strange things going on when rendering the following scene:
>
> torus { 1, 1 translate y*(1/0)/(1/0) }
>
> Some versions of POV-Ray definitely hang over here (even with +w1 +h1).
> Here's what I noticed:
>
> Linux:
> 3.6.1 official binary: hangs
> 3.6.1 self-compiled: does not hang
> 3.5 self-compiled: does not hang
> MegaPOV 1.1 compiled by Chris Hormann: hangs
>
> Windows:
> 3.6.1 official binary: does not hang
> 3.7.0.beta.4.icl8.win32: does not hang
>
> Linux tests were done by me on a Gentoo Linux, Kernel 2.6.11, AMD Athlon
> XP 2600+, 1 GB RAM.
> Windows tests were done by Lance Birch on a Win2000 Pro, Dual Athlon MPs.
>
> This is either a issue with the official Linux binaries or with my setup
> over here. I'd therefore be glad if anyone using Linux could render the
> scene himself and post the results.
>
> BTW: I do no that this translation does not make sense :) But I figured
> if POV-Ray allows me to use inf and nan values, it should not hang on
> them...
>
>
> Florian
The strangest thing is that there is no error: 1/0 is NOT a real number and
(1/0)/(1/0) is not defined.
Renders OK here on windows official POV-Ray 3.6.1a
Alain
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Entre otras cosas, Florian Brucker tuvo a bien escribir:
> I got very strange things going on when rendering the following scene:
>
> torus { 1, 1 translate y*(1/0)/(1/0) }
>
> Some versions of POV-Ray definitely hang over here (even with +w1 +h1).
> Here's what I noticed:
>
> Linux:
> 3.6.1 official binary: hangs
> 3.6.1 self-compiled: does not hang
> 3.5 self-compiled: does not hang
> MegaPOV 1.1 compiled by Chris Hormann: hangs
It seems to hang here (self-compiled, Mandriva 2005):
$ gcc -v
Reading specs from /usr/lib/gcc/i586-mandrake-linux-gnu/3.4.3/specs
Configured with: ../configure --prefix=/usr --libexecdir=/usr/lib
--with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info
--enable-shared --enable-threads=posix --disable-checking
--enable-long-long --enable-__cxa_atexit --enable-clocale=gnu
--disable-libunwind-exceptions --enable-languages=c,c++,ada,f77,objc,java
--host=i586-mandrake-linux-gnu --with-system-zlib
Thread model: posix
gcc version 3.4.3 (Mandrakelinux 10.2 3.4.3-7mdk)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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From: Nicolas Calimet
Subject: Re: POV-Ray hangs when using invalid numbers
Date: 19 May 2005 09:09:50
Message: <428c901e$1@news.povray.org>
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> It seems to hang here (self-compiled, Mandriva 2005):
> gcc version 3.4.3 (Mandrakelinux 10.2 3.4.3-7mdk)
Yes, as I said it seems to occur when povray is compiled with
the 3.4 gcc series, and only this one as far as I tested. It has to
do with the optimizer, which probably emits wrong code at some point.
I'll see if I can file a bug report in case nothing similar exists in
the gcc bugzilla database.
- NC
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