DynamicMatrixTransform

class astropy.coordinates.DynamicMatrixTransform(matrix_func, fromsys, tosys, priority=1, register_graph=None)

Bases: 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_funcpython:callable()

A callable that has the signature matrix_func(fromcoord, toframe) and returns a 3 x 3 matrix that converts fromcoord 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.

prioritypython:float or python:int

The priority if this transform when finding the shortest coordinate transform path - large numbers are lower priorities.

register_graphTransformGraph or python:None

A graph to register this transformation with on creation, or None to leave it unregistered.

Raises:

TypeError

If matrix_func is not callable