[Feature] Full angle range

[calcoloergosum]

NOTE: This PR alone does not make training work.

Thank you for your amazing codebase.

Motivation

Resolve #386 #565 #902 #1045 . Sometimes we want the full range of angle.

Modification

• Added new angle_version called "full360".

Use cases (Optional)

Anything that is not rotation invariant shaped objects.
For example:

• letters
• animal with head/tail. Yudo
• arrows
• ...

Note

• Introducing full angle range requires specific convention regarding the order of points in a bounding box.
  For code in this PR, bounding box is defined to be the clockwise - (lt, rt, br, bl) or [(-,-), (-,+), (+,+), (+, -)].
• First time contributing. Please let me know if I am doing something off.
• To make it work, RBBoxAssigner should be modified accordingly.

Checklist

• Pre-commit or other linting tools are used to fix the potential lint issues.
• The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, like docstring or example tutorials.

[CLAassistant]

All committers have signed the CLA.

[calcoloergosum]

I just realized that this repo already is working on 360 rotation detection :P

[yangxue0827]

I think your implementation is better and more flexible.

[zytx121]

@calcoloergosum Thank you for your contribution. We will incorporate your angle representation into the main branch as one of the default angle representations.