Re: Help: Texture mapping!

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Mario Veraart (rioj7++at++fel.tno.nl)
Fri, 13 Dec 1996 11:56:44 +0100 (MET)

> Sorry, this is not a performer question.
> I need to draw a circle on any type of polygon like
> a square, trapezium, parralelogram etc. The
> circle should get mapped correctly in the texture
> so that it looks like a circle on the polygon. Everything
> should happen in real time. I have a sphere and
> I move around a object made with different kinds
> of polygons. The sphere should leave traces of
> circles on the other object. If anyone know how
> to do it, please let me know.

I would suggest to draw these circles in OpenGL.
Keep track of where you want a circle to appear, gather
enough parameters to draw it every frame, and draw
a circles as a connected line strip in 3D every frame.

Mario
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