StaticMatrixTransform¶

class
astropy.coordinates.
StaticMatrixTransform
(matrix, fromsys, tosys, priority=1, register_graph=None)[source]¶ Bases:
astropy.coordinates.BaseAffineTransform
A coordinate transformation defined as a 3 x 3 cartesian transformation matrix.
This is distinct from DynamicMatrixTransform in that this kind of matrix is independent of frame attributes. That is, it depends only on the class of the frame.
 Parameters
 matrixarray_like or callable
A 3 x 3 matrix for transforming 3vectors. In most cases will be unitary (although this is not strictly required). If a callable, will be called with no arguments to get the matrix.
 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
 ValueError
If the matrix is not 3 x 3
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.