CartesianMapper

class ginga.canvas.coordmap.CartesianMapper(viewer)[source]

Bases: BaseMapper

A coordinate mapper that maps to the viewer in Cartesian coordinates that do not scale (unlike DataMapper).

Methods Summary

`data_to`(data_pts[, viewer])
`offset_pt`(pts, offset)	Offset a point specified by `pt`, by the offsets `offset`.
`rotate_pt`(pts, theta, offset)	Rotate a point specified by `pt` by the angle `theta` (in degrees) around the point indicated by `offset`.
`to_data`(crt_pts[, viewer])

Methods Documentation

offset_pt(pts, offset)[source]: Offset a point specified by pt, by the offsets offset. Coordinates are assumed to be in the space defined by this mapper.

rotate_pt(pts, theta, offset)[source]: Rotate a point specified by pt by the angle theta (in degrees) around the point indicated by offset. Coordinates are assumed to be in the space defined by this mapper.