#!/usr/bin/env bash
# #87 bench: MECH ARMOUR DARKENING.
#
# The 1995 renderer lerped every material a damage zone paints from its authored
# colour toward 0.1x as that zone's damageLevel ran 0->1 (FUN_004573e4 built one
# watcher per (zone, material) from the mech's .DZM list; FUN_00457784 re-pushed
# the blend on every change).  Our renderer swapped destroyed LIMB meshes but
# never darkened a panel -- "the actual enemy mech in external view is not
# showing darkened armor panels".
#
# Two legs:
#   self  -- self-damage one named zone on the player's own mech; the cleanest
#            read of the level->brightness chain (deterministic, one zone).
#   enemy -- walk up to a spawned target and shoot it: the REPORTED case, an
#            enemy hull darkening under fire, with screenshots to pixel-verify.
#
# Verdict lines:
#   [armor] zone N '<dzname>' -> M draw op(s)      .DZM list resolved onto geometry
#   [armor] '<mat>' zone N level a -> b (brightness kx)   level reaching the ops
#
# usage: armor_darken.sh [self|enemy] [zone]
set -x
. /c/git/bt411/scratchpad/night6/bench_common.sh
cd /c/git/bt411/content || exit 1
taskkill //F //IM btl4.exe > /dev/null 2>&1
sleep 2

LEG="${1:-self}"
ZONE="${2:-dz_ltorso}"
LOG=armor_${LEG}.log
rm -f "$LOG" armorshot_*.tga

sed "s/^map=.*/map=grass/; s/^time=.*/time=day/" MP.EGG > ARMOR.EGG

if [ "$LEG" = "enemy" ]; then
  # The reported case: an ENEMY hull taking fire.  Beeline to the spawned target
  # and hold the trigger; BT_SHOT_EVERY dumps backbuffer frames so the panels can
  # be compared pixel-wise before/after.
  BT_ARMOR_LOG=1 BT_DMG_LOG=1 \
  BT_SPAWN_ENEMY=1 BT_GOTO=enemy BT_GOTO_STOP=2 BT_AUTOFIRE=1 \
  BT_SHOT_EVERY=300 BT_SHOT_PREFIX=armorshot \
    bt_launch "$LOG" ARMOR.EGG 0x03
elif [ "$LEG" = "ext" ]; then
  # PIXEL leg.  Same single-zone ramp, but in the EXTERNAL chase camera so the
  # hull fills the frame and one zone can be compared before/after.
  #
  # NOTE: this deliberately overrides the shipped player env's BT_START_INSIDE=1
  # (bench_common) -- players start in the cockpit and cannot see their own hull.
  # This leg exists ONLY to photograph the panels; the `self` and `enemy` legs
  # are the player-authentic ones.
  ( bt_player_env
    # presence-only gate (btl4vid.cpp:657) -- "=0" still reads as set, so UNSET it
    unset BT_START_INSIDE
    export BT_LOG="$LOG" BT_AFFINITY=0x03
    export BT_ARMOR_LOG=1 BT_DMG_LOG=1
    export BT_SELF_DAMAGE=3 BT_SELF_DAMAGE_ZONE="$ZONE"
    export BT_SHOT_EVERY=600 BT_SHOT_PREFIX=armorext
    "$BT_EXE" -egg ARMOR.EGG & )
else
  # Deterministic single-zone ramp on our own mech.  Small dose so the level
  # climbs in steps instead of saturating in one tick.
  BT_ARMOR_LOG=1 BT_DMG_LOG=1 \
  BT_SELF_DAMAGE=3 BT_SELF_DAMAGE_ZONE="$ZONE" \
    bt_launch "$LOG" ARMOR.EGG 0x03
fi

sleep 90
taskkill //F //IM btl4.exe > /dev/null 2>&1
sleep 2

echo "=== per-entity binding totals ==="
grep -E "^\[armor\] entity" "$LOG" | sort -u
echo "=== level changes ==="
grep -E "^\[armor\] '" "$LOG" | head -30
echo "=== distinct materials darkened ==="
grep -E "^\[armor\] '" "$LOG" | sed "s/.*\['armor'\] //" | awk '{print $2}' | sort -u | head -20
echo "=== shots ==="
ls armorshot_*.tga 2>/dev/null | head