heyoka.model.state_from_rsw

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heyoka.model.state_from_rsw#

heyoka.model.state_from_rsw(*, pos: Iterable[expression], vel: Iterable[expression], r: Iterable[expression], v: Iterable[expression]) → tuple[list[expression], list[expression]]#

Convert state from the RSW frame.

Added in version 7.9.0.

This function is the inverse of state_to_rsw(). It takes in input a Cartesian state pos and vel in the RSW frame defined by r and v, and transforms it back to the frame in which r and v are defined.

Please see state_to_rsw() for details on how the RSW frame is defined.

Parameters:

  • pos – the position vector in the RSW frame.

  • vel – the velocity vector in the RSW frame.

  • r – the Cartesian position of the origin of the RSW frame.

  • v – the Cartesian velocity of the origin of the RSW frame.

Returns:

pos and vel transformed back into the original reference frame.

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