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#87 dig closure: host response is linear (raw decomp re-read); the pixel curve was div-card firmware

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Re-read the material damage watcher RAW (@004573e4 ctor / @00457784
change-push): 16 floats snapshotted, damaged = pristine x 0.1 (literal at
the MakeMechRenderables call site, watching zone+0x158), linear lerp, 13
floats written back, then FUN_0048d4d4 -- which is "flush_material": a dpl
command-stream marshal (opcode 100) to the i860 division card. The
material->ramp->texel response curve was CARD firmware and is not in
BTL4OPT.EXE; logged as an open question (ask: firmware/DIV docs/period
screenshots).

Field reconciliation, measured live: one 25-pt hit (ERLG class) snaps a
77-pt arm 0 -> 0.3247 in a frame -- "a single missile leaves visible
armor damage" holds under the linear curve for heavy hits; 2-pt ERS creep
(the leg-audit weapon) is the invisible case.

Bench additions: BT_WALK_ZONES=<name-list> walker filter (concentrated
per-region audits, scratchpad/night10/legwalk.sh) + BindArmourDamage
ORPHAN inventory under BT_ARMOR_LOG (proved every drawn op is
zone-claimed on the full tree).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Joe DiPrima
2026-08-03 13:10:00 -05:00
co-authored by Claude Fable 5
parent fe48accb6b
commit 440cee1e4f
5 changed files with 132 additions and 8 deletions
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game/reconstructed/mech4.cpp
+39 -2
View File
@@ -6025,6 +6025,19 @@ void
static float s_zwT = 1.0e9f;
static int s_zwZone = -1;
static int s_zwShots = 0;
// BT_WALK_ZONES=<comma-list>: restrict the walk to zones whose NAME
// contains one of the tokens (e.g. "leg,foot,hip" -- the concentrated
// per-region audit; repeated passes pile damage into few zones so the
// doll movement is unmistakable). Empty/absent = walk everything.
static const char *s_zwFilter = 0;
static int s_zwFilterInit = 0;
if (!s_zwFilterInit)
{
s_zwFilterInit = 1;
s_zwFilter = getenv("BT_WALK_ZONES");
if (s_zwFilter != 0 && *s_zwFilter == '\0')
s_zwFilter = 0;
}
if (s_zwPeriod <= 0.0f)
{
s_zwPeriod = (float)atof(getenv("BT_ZONE_WALK"));
@@ -6119,8 +6132,32 @@ void
s_zwZone = -1; // wrap
continue;
}
if (segIdx >= 0)
break;
if (segIdx < 0)
continue;
if (s_zwFilter != 0) // BT_WALK_ZONES name filter
{
int match = 0;
const char *tok = s_zwFilter;
while (*tok != '\0' && !match)
{
const char *end = tok;
while (*end != '\0' && *end != ',')
++end;
char buf[64];
int len = (int)(end - tok);
if (len > 0 && len < (int)sizeof(buf))
{
memcpy(buf, tok, len);
buf[len] = '\0';
if (strstr(zname, buf) != 0)
match = 1;
}
tok = (*end == ',') ? end + 1 : end;
}
if (!match)
continue;
}
break;
}
DEBUG_STREAM << "[walk] ZONE " << s_zwZone << " '" << zname
<< "' seg=" << segIdx << " target="