AffineTransform¶
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class
astropy.coordinates.
AffineTransform
(transform_func, fromsys, tosys, priority=1, register_graph=None)[source] [edit on github]¶ Bases:
astropy.coordinates.BaseAffineTransform
A coordinate transformation specified as a function that yields a 3 x 3 cartesian transformation matrix and a tuple of displacement vectors.
See
Galactocentric
for an example.Parameters: transform_func : callable
A callable that has the signature
transform_func(fromcoord, toframe)
and returns: a (3, 3) matrix that operates onfromcoord
in a Cartesian representation, and aCartesianRepresentation
with (optionally) an attached velocityCartesianDifferential
to represent a translation and offset in velocity to apply after the matrix operation.fromsys : class
The coordinate frame class to start from.
tosys : class
The coordinate frame class to transform into.
priority : number
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
transform_func
is not callableMethods Summary
__call__
(fromcoord, toframe)Methods Documentation
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__call__
(fromcoord, toframe)[source] [edit on github]¶
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