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From: Warp
Subject: Re: "best" way to create an shape covered with a picture?
Date: 20 Nov 2002 06:15:22
Message: <3ddb6eca@news.povray.org>
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ABX <abx### [at] abx artpl> wrote:
> Is the mobious tape treated as closed mesh ? ;-)
If it's a sheet of triangles, then it has borders. At these borders triangles
don't share one of their edges with any other triangle.
--
#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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From: Tom Melly
Subject: Re: "best" way to create an shape covered with a picture?
Date: 20 Nov 2002 06:58:38
Message: <3ddb78ee$1@news.povray.org>
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"Warp" <war### [at] tagpovrayorg> wrote in message news:3ddb680f@news.povray.org...
> Tom Melly <tom### [at] tomandlucouk> wrote:
> > Each edge of each triangle is shared by another triangle.
>
> Not necessarily. (This is only true for closed meshes.)
Heh - KISS.
I'm also slightly assuming that meshes created from exported models will tend to
be closed (since they rarely have infinitely thin elements).
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if it's a triangle sheet, wouldn't it only have one border?
Warp wrote:
> ABX <abx### [at] abxartpl> wrote:
>
>>Is the mobious tape treated as closed mesh ? ;-)
>>
>
> If it's a sheet of triangles, then it has borders. At these borders triangles
> don't share one of their edges with any other triangle.
>
>
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From: Warp
Subject: Re: "best" way to create an shape covered with a picture?
Date: 21 Nov 2002 03:54:47
Message: <3ddc9f57@news.povray.org>
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benp <ben### [at] rspcomau> wrote:
> if it's a triangle sheet, wouldn't it only have one border?
It depends. If you join two opposite edges of a sheet, you get then two
borders.
In the case of a moebius strip there's only one contiguous border because
the sheet makes a 180 degrees turn before joining the two opposite edges.
--
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -
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