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I'm interested in knowing more about how bicubic patches work, so that I can
maybe make some macros that can extent the things possible to do with
bicubic patches.
Here's a challenge:
Make a macro takes 16 points as input and then creates a mesh similar to the
corresponding bicubic patch.
Oh, well, I probably can't expect that anyone do that just because I ask,
but then I at least hope someone can point me to resources that contains
enough information that I will be able to do it myself.
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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in news:3c66bbb9@news.povray.org Rune wrote:
> Here's a challenge:
>
> Make a macro takes 16 points as input and then creates a mesh similar
> to the corresponding bicubic patch.
Search for bicubic.inc by John VanSickle,
don't remember in what group under what title though,
Ingo
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Rune <run### [at] mobilixnet dk> wrote:
: Make a macro takes 16 points as input and then creates a mesh similar to the
: corresponding bicubic patch.
Colefax's PCM macros can place objects on the surface of a bicubic patch.
Thus it should be rather easy to adapt it to calculate vertex point on the
surface of the bicubic patch.
--
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}// - Warp -
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in news:Xns### [at] povrayorg ingo wrote:
> Search for bicubic.inc by John VanSickle,
> don't remember in what group under what title though,
>
>
Found it:
Message-ID: <3AD772B7.C88CC3B0@erols.com>
From: John VanSickle <van### [at] erolscom>
Newsgroups: povray.binaries.utilities
Subject: Re: Bicubic patch to mesh?
Date: Fri, 13 Apr 2001 23:42:15 +0200
Xref: news.povray.org povray.binaries.utilities:3084
Ingo
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"ingo" wrote:
> Search for bicubic.inc by John VanSickle,
> don't remember in what group under what title though,
Can't find it anywhere, on news.povray.org or with google.
When searching for bezier.inc I get some results, but only to create bezier
lines, not bezier patches, and it's not made by John VanSickle either.
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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Never mind, I think I've just seen the light.
It was on this page:
http://www.gamedev.net/reference/articles/article1584.asp
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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Rune wrote:
> I'm interested in knowing more about how bicubic patches work, so that I can
> maybe make some macros that can extent the things possible to do with
> bicubic patches.
Please see my recent posts in p.t.s-f
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I wrote:
> Never mind, I think I've just seen the light.
>
> It was on this page:
> http://www.gamedev.net/reference/articles/article1584.asp
But still thanks to Ingo and Warp. Now I have both the theory and some
working examples. :)
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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"Dave Dunn" wrote:
> Rune wrote:
>
> > I'm interested in knowing more about how bicubic
> > patches work, so that I can maybe make some macros
> > that can extent the things possible to do with
> > bicubic patches.
>
> Please see my recent posts in p.t.s-f
???
As far as I can see those don't do anything like what I requested.
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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"Rune" <run### [at] mobilixnetdk> wrote in message
news:3c66e67d@news.povray.org...
> "Dave Dunn" wrote:
> >
> > Please see my recent posts in p.t.s-f
>
> As far as I can see those don't do anything like what I requested.
Hmmm, if Dave hadn't pointed his files out I would have. Sounded just ike
the thing you were asking to me too. Creates a bicubic_patch by macro and
places wireframe for it. You going to make a triangle mesh from the patch?
I'd think that would work out by replacing the wireframe with triangles
maybe.
Admittedly, I haven't seen the others mentioned already.
bob h
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