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

calc_offsets(pts)[source]¶

data_to(data_pts, viewer=None)[source]¶

offset_pt(pts, offset)[source]¶

rotate_pt(pts, theta, offset)[source]¶

to_data(delta_pt, viewer=None)[source]¶