conic equation

Hi all,

Does any one knows how can I plot the general conic equation ( Ax^2 + By^2 + Cxy + Dx + Ey + F ).

this equation may represent an ellipse, hyperbola, parabola depending on A,B,C,D,E,F values, here is the rule:

B^2 - 4AC < 0 => ellipse.
B^2 - 4AC = 0 => parabola.
B^2 - 4AC > 0 => hyperbola.

Thanks alot.

by hand or computer?? by computer you can goto www.quickmath.com

I'm not sure if you need this, but check this page: http://graphics.lcs.mit.edu/~mcmilla...re7/conic.html
It explains how to draw conic curves with a Bresenham-like approach.