GLUTesselator for realtime tesselation?

Question

I'm trying to make a vector drawing application using OpenGL which will allow the user to see the result in real time. The way I have it set up is with an edge flag callback so the glu tesselator only outputs triangles which I then pass to a VBO. I'v tried t make all my algorithms as fast as possible and this is not where my issue is. According to a few code profilers, my big slowdown occurs in a call to GLUTessEndPolygon() which is the function that makes the polygon. I have found that when the shape exceeds 100 input verticies, it gets really really slow and basically destroys all the hard work I did to optimize everything else. What can I do? I provide the normal of (0,0,1). I also tried all the tips from the GL redbook. Is there a way to make the tesselator tesselate quicker but with less precision?

Thanks

possible duplicate of [Alternative to GLUTesselator?](http://stackoverflow.com/questions/3231128/alternative-to-glutesselator) — finnw, Jul 04 '11 at 15:35

score 2 · Accepted Answer · answered Aug 11 '10 at 21:15

2

You might give poly2tri a try to see if it's any faster.

answered Aug 11 '10 at 21:15

genpfault

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Thanks, except, where can I find usage information on it? Also does it need to be compiled as a lib, or can it just be used as is? Thanks – jmasterx Aug 12 '10 at 02:08
I just used the [source browser](http://code.google.com/p/poly2tri/source/browse/). It looks like you should be able to just add the files to your project. – genpfault Aug 12 '10 at 05:15
Can ithave self intersecting polygons? – jmasterx Aug 13 '10 at 01:53
What about the General Polygon Clipper? – jmasterx Aug 13 '10 at 02:16

GLUTesselator for realtime tesselation?

1 Answers1