Recent content by fatjjx

indeed, what I want is just an ellipse in a 3D space, not the ellipsoid. I am doing the research of how the projection of a ellipse that is not parallel with the image plane will be. so I need the ellipse formula in 3D space. thank you for your response!

you are right! but what is the 3D formula of a ellipse?? that is the real problem. thank you! :)

the regular ellipse formula in 2D is x^2/a^2 + y^2/b^2 = 1. but how can it be transformed into a 3D formula including the parameter of z? thank you!