Re: Help: Texture mapping!

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Brian Furtaw (brian++at++sgi.com)
Fri, 13 Dec 1996 09:25:05 -0500

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In reply to: Pari Natarajan: "Help: Texture mapping!"

As long the geometry you want to leave the circle on is coplanar, you can
create a circle on top of a polygon using pfdNewCircle or pfdNewRing. To ensure
that the circle is on top of the geometry parent the geometry then the circle
to a pfLayer node.

Brian

On Dec 13, 11:56am, Mario Veraart wrote:
> Subject: Re: Help: Texture mapping!
> > 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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>-- End of excerpt from Mario Veraart

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