[TaCZ] First Aid Compat

A compatibility mod that enables precise 3D hitbox-based damage distribution when using TacZ (Timeless and Classics Zero) with First Aid.

Features

Realistic Bodypart Targeting: Uses exact 3D hit locations to determine which bodypart was hit, instead of FirstAid's default random/height-based distribution
Proper Armor Protection: Calculates armor protection per bodypart (head, chest, legs, feet)
Damage Spillover: Implements realistic damage spillover mechanics - when a limb is destroyed, excess damage transfers to the torso
Crawl Support: Properly handles damage distribution when players are in TacZ's crawling/prone state
Explosion Support: Distance-based damage distribution for explosions

This mod uses Mixin to intercept TacZ's bullet hit events and FirstAid's damage distribution system:

When a TacZ bullet hits a player, the exact 3D hit location is captured
The hit location is converted to player-local coordinates (accounting for rotation and posture)
A 3D hitbox system determines which bodypart was hit
FirstAid applies damage to that specific bodypart, with proper armor calculation
If the bodypart is destroyed, excess damage spills over to the torso

Hitbox System: Defines precise 3D bounding boxes for each bodypart (head, torso, arms, legs, feet)
Coordinate Transform: Handles world-to-local coordinate conversion with proper yaw rotation and crawl positioning
Spillover Logic:
- Bullets: 80% of excess damage transfers (20% energy loss)
- Explosions: 100% of excess damage transfers (shockwave)
- Feet: Damage first spills to the corresponding leg, then to torso

MIT License - See LICENSE for details