POV-Ray : Newsgroups : povray.beta-test : Possible bug with cones Server Time
2 Jul 2024 10:55:30 EDT (-0400)
  Possible bug with cones (Message 1 to 4 of 4)  
From: Reactor
Subject: Possible bug with cones
Date: 26 Jan 2010 00:55:01
Message: <web.4b5e82d8ec8705cfb7bd161a0@news.povray.org>
This had me scratching my head for quite a bit until I tried it under 3.6.  The
problem seems to be that the second vector for the cone endpoint is incorrectly
transformed, but it only happens when the first parameter is smaller than the
second one.

Here is a minimal scene:

/****************************************************************************
Version: POV-ray 3.6 (official)
Scene Description:  Demo scene demonstrating an issue with cones in POV-ray
    version 3.7 beta 35 (64-bit) (run under Windows XP64)
Written by: Reactor
Date: 25 Jan 2010
****************************************************************************/
#version 3.6;

cone{ <-1,1,1>, 1.0, <-1,1,-1>, 0.5 pigment{ color rgb <1,0,0> } }

cone{ < 1,1,1>, 0.5, < 1,1,-1>, 1.0 pigment{ color rgb <0,0,1> } }

// cone{ < 3,1,-1>, 1.0, < 3,1, 1>, 0.5 pigment{ color rgb <0,1,0> } }


// ground plane
plane
{
    y, 0
    pigment{ color rgb <1,1,1> }
}



light_source
{
    <100,100,-100>
    color rgb <1,1,1>
}



camera
{
    location  < 0, 6,-6>
    look_at   < 0, 2, 0>
}


//---------------------------------

The placement of the cones is different between 3.6 and 3.7 beta 35 (3.6 is
correct)


-Reactor


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From: Reactor
Subject: Re: Possible bug with cones
Date: 26 Jan 2010 01:00:11
Message: <web.4b5e842489968003b7bd161a0@news.povray.org>
I posted the images in p.b.i under "Image for cone bug in 3.7"

<web.4b5e835f3b2c19c0b7bd161a0@news.povray.org>

-Reactor


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From: Thorsten Froehlich
Subject: Re: Possible bug with cones
Date: 26 Jan 2010 03:34:58
Message: <4b5ea932$1@news.povray.org>
On 26.01.10 06:56, Reactor wrote:
> I posted the images in p.b.i under "Image for cone bug in 3.7"
>
> <web.4b5e835f3b2c19c0b7bd161a0@news.povray.org>

Nice, but it would have been nicer if you had downloaded the latest beta 
before making a bug report ;-)  The latest beta is 35a.

	Thorsten


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From: Reactor
Subject: Re: Possible bug with cones
Date: 26 Jan 2010 10:50:00
Message: <web.4b5f0e048996800325b3a8070@news.povray.org>
Thorsten Froehlich <tho### [at] trfde> wrote:
> On 26.01.10 06:56, Reactor wrote:
> > I posted the images in p.b.i under "Image for cone bug in 3.7"
> >
> > <web.4b5e835f3b2c19c0b7bd161a0@news.povray.org>
>
> Nice, but it would have been nicer if you had downloaded the latest beta
> before making a bug report ;-)  The latest beta is 35a.
>
>  Thorsten

My goodness, when did that come out??

Huh, I'm two weeks behind.  Please disregard (unless you were also running an
outdated beta and received unexpected output while writing a macro that cuts
beveled cones into other shapes)!

-Reactor


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