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Marius

circle projection.

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Projecitng a circle on a given plane. I am interested in finding a relation between the elipse equation and circle equation. Thanks. [Edited by - Marius on September 11, 2005 5:01:49 PM]

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Dont think this is the perfect solution, but it works...

for each connecting line point, project a ray from the camera (where the corresponding 2D circle point would be etc) to the plane, find the intersection point and draw a vertex there...

should be quite slow thou, but if you use a textured quad or something with a circle, you could get away with just four rays...


peace!

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Rasmadrak solution works, surely, but, may be, Marius needs an exact solution?
By the way, are you sure, you need circle projection, not sphere projection?
Explain your task more serious, I mean, what is the projection direction, how is your circle (or sphere, maybe?) is given, and so on.

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