DynamicMatrixTransform¶
-
class
astropy.coordinates.
DynamicMatrixTransform
(matrix_func, fromsys, tosys, priority=1, register_graph=None)[source]¶ Bases:
astropy.coordinates.BaseAffineTransform
A coordinate transformation specified as a function that yields a 3 x 3 cartesian transformation matrix.
This is similar to, but distinct from StaticMatrixTransform, in that the matrix for this class might depend on frame attributes.
- Parameters
- matrix_funccallable
A callable that has the signature
matrix_func(fromcoord, toframe)
and returns a 3 x 3 matrix that convertsfromcoord
in a cartesian representation to the new coordinate system.- fromsysclass
The coordinate frame class to start from.
- tosysclass
The coordinate frame class to transform into.
- prioritynumber
The priority if this transform when finding the shortest coordinate transform path - large numbers are lower priorities.
- register_graph
TransformGraph
orNone
A graph to register this transformation with on creation, or
None
to leave it unregistered.
- Raises
- TypeError
If
matrix_func
is not callable
Methods Summary
__call__
(self, fromcoord, toframe)Does the actual coordinate transformation from the
fromsys
class to thetosys
class.Methods Documentation
-
__call__
(self, fromcoord, toframe)[source]¶ Does the actual coordinate transformation from the
fromsys
class to thetosys
class.- Parameters
- fromcoordfromsys object
An object of class matching
fromsys
that is to be transformed.- toframeobject
An object that has the attributes necessary to fully specify the frame. That is, it must have attributes with names that match the keys of the dictionary that
tosys.get_frame_attr_names()
returns. Typically this is of classtosys
, but it might be some other class as long as it has the appropriate attributes.
- Returns
- tocoordtosys object
The new coordinate after the transform has been applied.