gfx-replay: Record scene graph deletions.

[0mdc]

Motivation and Context

When the simulator changes scene, the previous scene graph is not deleted. Because Recorder relies on scene node deletion to issue deletion entries to gfx-replay, the previous scene is not cleared from the replay renderer.

This changeset adds a method to delete all gfx-replay nodes within a scene graph so that the replay renderer can correctly render process scene changes.

How Has This Been Tested

Tested through Python viewer.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.

[eundersander]

Left some comments.

[eundersander]

LGTM!