Visualizing relative paths (WIP)

[eringram]

Description

WIP

Issue number and link

Testing plan

Added a new developer Sandcastle demonstrating this feature. It has the following buttons:

• "Satellite 1" - Displays satellite 2 entity's path relative to satellite 1
• "Satellite 2" - Displays satellite 1's path relative to satellite 2
• "Both" - Displays both satellites with a default undefined path.relativeTo property
• "Earth" - Displays both satellites with a default undefined path.relativeTo, but zoomed out to view their path around the Earth
• "Satellite 2 - fixed frame path" - Displays satellite 1 with a default undefined path.relativeTo property, and satellite 2 with its path relative to a fixed frame
• "Satellite 2 - orientation" - Displays satellite 1 with a default undefined path.relativeTo property, and two versions of satellite 2's path
  • One satellite 2 path, in orange, is relative to satellite 1 where satellite 1 does not have an orientation property set
  • The second satellite 2 path, in yellow, is relative to satellite 1 where satellite 1 does have an orientation property set to "velocityReference":"#position"

Author checklist

• I have submitted a Contributor License Agreement
• I have added my name to CONTRIBUTORS.md
• I have updated CHANGES.md with a short summary of my change
• I have added or updated unit tests to ensure consistent code coverage
• I have updated the inline documentation, and included code examples where relevant
• I have performed a self-review of my code

[github-actions]

Thank you for the pull request, @eringram!

✅ We can confirm we have a CLA on file for you.