POV-Ray : Newsgroups : povray.general : My triangle function is stupid Server Time
31 Oct 2024 23:29:34 EDT (-0400)
  My triangle function is stupid (Message 1 to 9 of 9)  
From: Tom Melly
Subject: My triangle function is stupid
Date: 11 Mar 2005 07:38:14
Message: <42319136$1@news.povray.org>
... well, I suspect it is. What's the 'classic' function for a triangle?

Oh, here's mine:
max(abs(x) + (max(y,0)-1), y*-1)


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From: Marc Jacquier
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 07:41:00
Message: <423191dc$1@news.povray.org>

news:42319136$1@news.povray.org...
> ... well, I suspect it is. What's the 'classic' function for a triangle?
>
> Oh, here's mine:
> max(abs(x) + (max(y,0)-1), y*-1)
>
I have no clue but I hope you don't want to render meshs with isosurface
triangles ;-)

Marc


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From: Tom Melly
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 08:01:50
Message: <423196be@news.povray.org>
"Marc Jacquier" <jac### [at] wanadoofr> wrote in message
news:423191dc$1@news.povray.org...

> I have no clue but I hope you don't want to render meshs with isosurface
> triangles ;-)

Heh - not quite. A 3d version of a child's drawing of a house. Using a iso
means I can get  some nice wobbly edges and reuse the function for the
pigment.... and, no, you don't get a prize for guessing which part of the
house I need a triangle for.


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From: Florian Brucker
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 08:33:49
Message: <42319e3d$1@news.povray.org>
IIRC there's a f_triangle in MegaPOV.

HTH,
Florian


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From: ABX
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 09:25:59
Message: <mea331tdq9hpical37sjom4p5q7vek9gud@4ax.com>
On Fri, 11 Mar 2005 12:36:15 -0000, "Tom Melly" <pov### [at] tomandlucouk> wrote:
> ... well, I suspect it is. What's the 'classic' function for a triangle?
>
> Oh, here's mine:
> max(abs(x) + (max(y,0)-1), y*-1)

f_triangle written in SDL is available in iso-csg. It can be also hardcoded in
custom builds (MegaPOV) as described at
http://www.abx.art.pl/pov/patches/f_triangle.php

ABX


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From: ABX
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 09:36:52
Message: <k5b3315gnbpuqroccki3mpo14ial5psl8n@4ax.com>
On Fri, 11 Mar 2005 13:42:15 +0100, "Marc Jacquier" <jac### [at] wanadoofr>
wrote:
> I hope you don't want to render meshs with isosurface
> triangles ;-)

Use the Source, Luke!

http://news.povray.org/povray.binaries.images/thread/%3Cbq452vgbjar919o5h6p6kccbculd64qdf1%404ax.com%3E/

ABX


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From: Tom Melly
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 10:43:16
Message: <4231bc94@news.povray.org>
"ABX" <abx### [at] abxartpl> wrote in message
news:mea331tdq9hpical37sjom4p5q7vek9gud@4ax.com...
>
> f_triangle written in SDL is available in iso-csg. It can be also
hardcoded in
> custom builds (MegaPOV) as described at
> http://www.abx.art.pl/pov/patches/f_triangle.php

Hmm, looking at the code in the iso_csg include, maybe my function isn't so
bad after all. I dunno - I just expected there to be a basic right-angle
triangle function of some elegance (like, say, the sphere function). At any
rate, something a little more elegant than my solution.


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From: Tim Cook
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 18:50:24
Message: <42322ec0$1@news.povray.org>
ABX wrote:
> Use the Source, Luke!

Ow.

I can't help but think how much more painful that'd've been had Marc's 
name actually been Luke instead.

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------


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From: Marc Jacquier
Subject: Re: My triangle function is stupid
Date: 11 Mar 2005 19:11:00
Message: <42323394@news.povray.org>

news:k5b3315gnbpuqroccki3mpo14ial5psl8n@4ax.com...
> On Fri, 11 Mar 2005 13:42:15 +0100, "Marc Jacquier"
<jac### [at] wanadoofr>
> wrote:
> > I hope you don't want to render meshs with isosurface
> > triangles ;-)
>
> Use the Source, Luke!
>
>
http://news.povray.org/povray.binaries.images/thread/%3Cbq452vgbjar919o5h6p6kccbculd64qdf1%404ax.com%3E/
>
> ABX

D'OH!

OK I agree it can be usefull (though your teapot won't pour ;-)

Marc


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