How to set up a spherical mirror

[leverglow]

There are four types of mirrors in 'curved mirror',but there's no spherical mirror.Should I set 'p' and 'q' of the elliptical mirror to be the same to simulate the spherical mirror?And whether 'p' and 'q' means the major and minor axes of the ellipse.

[kklmn]

Don't know if this is a version problem, but I see seven mirror types under Curved mirrors. What 'p' and 'q' are is said in the docs (focal distances). What's wrong with trying ToroidMirror? Don't you see it there?

[leverglow]

I know 'p' and 'q' means focal distances,but ellipse has only one focal distance and I need to set two parameters('p' and 'q' or f1 and f2).

[kklmn]

Ellipse has two focal distances: from the center of the mirror to ellipse's focus1 and focus2. For a circle, the two foci are merged.