The following part assumes that the detector_focal_point, `p0`, gives its units, `y0` and `z0`: https://github.com/ecell/scopyon/blob/master/scopyon/epifm.py#L504-L505 However, it's not true when the detector_focal_point is an origin, `(0, 0, 0)`.
The following part assumes that the detector_focal_point,
p0, gives its units,y0andz0:https://github.com/ecell/scopyon/blob/master/scopyon/epifm.py#L504-L505
However, it's not true when the detector_focal_point is an origin,
(0, 0, 0).