quadric.html

Paraboloid:
z = x^2 + y^2
Elliptic Cone:
z^2 = x^2 + 3*y^2
Ellipsoid:
x^2/4 + y^2/9 + z^2 = 1
Hyperboloid of One Sheet:
x^2+y^2-z^2 = 1;
Hyperboloid of Two Sheets:
-x^2 - y^2 + z^2 = 1
Hyperbolic Paraboloid:
z = x^2 - y^2