Transform coordinates and vectors for the MRF method

Issue/feature addressed

When using the moving reference frame method, the coordinates are fixed with the body. To visualise the body's motion, a pair of new coordinates "xCoord", "yCoord" and "zCoord" are added using the FieldConvert module, MRF. The vector variables can also be transformed by assigning "vectors".

Proposed solution

A pair of new coordinates "xCoord", "yCoord" and "zCoord" are added.

Implementation

This function is similar to the one used in the mapping method.

Tests

One test case is added.

Suggested reviewers

Notes

Checklist

• Functions and classes, or changes to them, are documented.
• User guide/documentation is updated.
• Changelog is updated.
• Suitable tests added for new functionality.
• Contributed code is correctly formatted. (See the contributing guidelines).
• License added to any new files.
• No extraneous files have been added (e.g. compiler output or test data files).