parabolic mirror

[leverglow]

Hi,
I've set up a parabolic mirror param and use f1 instead of p/q as the parameter.But my question is that the only parameter I used was its focus point,but you can't determine a parabola with just one focus, you need a vertex ,function directionor or something else to determine it.So what should I do to set up a determined parabolic mirror.

[leverglow]

And this is the code
'beamLine.parabolicalMirrorParam01 = roes.ParabolicalMirrorParam(
bl=beamLine,
name=r"former",
center=[0, 200, 0],
pitch=r"0.6deg",
rotationSequence=r"RxRyRz",
material=W,
limPhysX=[-2.0, 2.0],
limPhysY=[-30.0, 30.0],
isCylindrical=True,
f1=[0, 0, 0])'
I think I missed some parameter,the equation of the parabola is y=sqrt(0.18x) and you can't see it in the code.

[kklmn]

you can't determine a parabola with just one focus

center is also a parameter that matters

[leverglow]

oh,thanks a lot