(extensions.decompile) Titanfall 1 & 2 BrushSides

[snake-biscuits]

@F1F7Y over at MRVN-radiant/MRVN-radiant figured out plane indexing
Time to revisit brush slicing
https://github.com/MRVN-radiant/MRVN-radiant/blob/main/tools/remap/source/bspfile_titanfall.cpp#L607-L629

Also seems like the discard/ignore plane flags are linked to ray collision, but not player collision

Still doesn't solve model brush indexing for r2 so put in a lazy fix for that edge case so we can get sliced brush geo

[snake-biscuits]

Brush planes in r1 & r2 have been covered pretty thoroughly in #81
Totally forgot about this issue, but it's pretty well solved now.
Still having some issues w/ matching brushes to entities in r2 tho.

r5 collision is a different story, see #7 & #85

[snake-biscuits]

Literally a week after I opened this issue: d55c962

Could probably be better tho tbh.

Might be missing some facet of excluded planes.
IIRC some planes can be facing away from the brush origin.
planes.py was part of r1/r2 brush-plane research IIRC, but that's about to move to bsp_tool_examples as part of #88

NOTE: future research experiments should move to bsp_tool_examples or tests (tests.branch.TestTheories)

[snake-biscuits]

Currently revisiting BrushSideProperty.flags
BrushSideProperty is a BitField now

Made a new respawn.titanfall.brush method as a part of:

• Move extensions.editor.generic into utils.editor #169

This method includes the flags in BrushSide.flags (not shown in repr or annotations)
I want filtering out culled BrushSides to be deferred, so we can use the brush method to pull out all the sides
Makes debugging way easier