OffsetMapper¶
-
class
ginga.canvas.coordmap.
OffsetMapper
(viewer, refobj)[source]¶ Bases:
ginga.canvas.coordmap.BaseMapper
A coordinate mapper that maps to the viewer in data coordinates that are offsets relative to some other reference object.
Methods Summary
calc_offsets
(pts)data_to
(data_pts[, viewer])offset_pt
(pts, offset)rotate_pt
(pts, theta, offset)to_data
(delta_pt[, viewer])Methods Documentation