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Re: graphics formats, triangulisation & coordinate systems [message #36251 is a reply to message #36247]

Wed, 27 August 2003 13:47

Haje Korth
Messages: 651
Registered: May 1997

Senior Member

Neil,
triangulation can be a complex subject. I though the web site
http://www-2.cs.cmu.edu/~quake/triangle.html was rather informative. There
is even some FORTRAN code to get the job done!

Haje

--

"Neil" <nasalmon@onetel.net.uk> wrote in message
news:74039481.0308271207.5525accd@posting.google.com...
> Does anyone know how i can convert files in the 3DS format into the
> OBJ format, or have a code that can do this. This are many object in
> 3DS format but i want to manipulate verticies and polygons, so i need
> to access the raw data.
>
> I also need to convert all polygons to triangles, is there a simple
> triangulisation code i can use. I work in IDL so could this code be
> used in the conversion. To take care of reflections i need to ensure
> all surface are plane by definition, so i would like to convert all
> otherwise polygons to triangles
>
> Which is the best coordinate system to operate in for computer
> graphics, right-handed or left-handed. I am inclinded to use a
> right-hand coord system as most maths books use this.
>
> Also if i chose a particular system should i chose the z-coordinate as
> away (towards) the viewer or up (down). In know it is simple to
> convert, but i just want to use the same conventions as the majority
> of users.
>
> Many thanks,
>
> Neil

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[Message index]

		Re: graphics formats, triangulisation & coordinate systems By: nasalmon on Thu, 28 August 2003 11:44
		Re: graphics formats, triangulisation & coordinate systems By: Rick Towler on Wed, 27 August 2003 15:24
		Re: graphics formats, triangulisation & coordinate systems By: Haje Korth on Wed, 27 August 2003 13:47
		Re: graphics formats, triangulisation & coordinate systems By: Rick Towler on Thu, 28 August 2003 16:34

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