RE: displaying concave polygons with openGL

> -----Original Message-----
> From: popp@... [mailto:popp@...] On
> Behalf Of Bert Freudenberg
> Sent: maandag 21 april 2008 16:17
> To: croquet-dev@...
> Subject: Re: [croquet-dev] displaying concave polygons with openGL
>
> What I meant was rendering the data into textures as
> required, not loading them from bitmap files.
>
> - Bert -
>
> On 21.04.2008, at 15:46, Baveco, Hans wrote:
>
> >
> > Yes, that is the easy way. However, I would like to add GIS
> > functionality: creating the polygons from a spatial database and
> > directly display them in Croquet, without the need of a GIS
> inbetween
> > that would export the map as an image...
> > Spatial data would be e.g. in ESRI's shapefile (.shp) or
> export (.e00)
> > format.
> >
> > Hans
> >
> >
> >
> >
> > On 21.04.2008, at 15:08, Baveco, Hans wrote:
> >
> >> HI,
> >> I am looking for a way to display polygons in Croquet. I
> need this to
> >> be able to show maps in Croquet. With openGL only simple (convex,
> >> without holes, etc) polygons can be rendered. Non-simple polygons
> >> need
> >
> >> to be tesselated (converted into a set of convex polygons). GLUT
> >> apparently can be used to build this tesselation, but I
> find it very
> >> hard to understand how exactly to do this... Is it really the only
> >> way
> >
> >> to achieve my goal (appart from doing this tesselation in Squeak,
> >> which might be pretty slow for large maps, say consisting of upto
> >> 100.000 polygons)? Or is there a workaround? (I suppose others may
> >> have felt the need to display such polygons....). Cairo
> also seems to
> >> be able to do this tesselation, but can it be used in
> Croquet? (a 2D
> >> rendering would be ok),
> >
> >
> > Unless your maps are dynamic, displaying them as a texture would be
> > most appropriate IMHO. It's hard to be more specific
> without knowing
> > the details and requirements.
> >
> > - Bert -
> >
> >
> >
> >
>
>
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>