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Wreck sink (quadratic burial) + ldbr debris field -- the 1996 script completed

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Answers "does the wreck fade away?": YES, by sinking.  FUN_00456410 (the 1996
sink renderable) computes offsetY = rate * t^2; the hulk's authored rate is
-0.025 -> the ~7-unit hulk is fully underground ~17s after the kill.  The
script also pairs the standing hulk with the LDBR strewn-debris field (12x13u
flat scatter), parented together and sinking together.

Also verified from the mesh data: BLHDBR (1537 verts -- more than the intact
torso) IS the authored Blackhawk wreck: the classic standing-leg-in-rubble
sculpt.  The "just a leg standing there" report is the authentic art.
(THRDBR -- the mesh the 1996 script hardcoded -- parses to ZERO vertices;
more evidence the hardcode was an unfinished dev shortcut.)

Implementation: SwapToWreck adds the ldbr piece; TickWreck applies the
quadratic sink per frame (driven from the dead mech's UpdateDeathState),
hides both pieces at burial and reports it so the wreck-smoke re-arm stops
with the wreck.  DPLStaticChildRenderable::SetOffsetTranslation added
(Execute re-reads OrientationMatrix per frame -- same in-place idiom as
SetDrawObj).

Lifecycle verified live: kill -> 'blhdbr.bgf' + ldbr debris -> smoke re-arm
@10s -> wreck buried @~17s -> smoke stops.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-08 15:55:01 -05:00
co-authored by Claude Fable 5
parent c0fa6bf21a
commit 5236d4263a
5 changed files with 166 additions and 9 deletions
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game/reconstructed/mech4.cpp
+7 -1
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@@ -955,8 +955,14 @@ void
// The .PFX itself trickles 3 particles/sec for 10s; re-arming it on that
// same cadence reads as a continuously burning wreck. The one-shot death
// visuals (dnboom + skins) stay in the kill path.
// The wreck hulk's quadratic SINK (the 1996 script's burial): the pieces
// settle into the ground and are gone ~17s after the kill. While the
// wreck is still visible, keep the death/rubble smoke plume alive on its
// authored 10s window; once buried, the smoke stops with it.
extern int BTWreckSinkTick(Entity *victim, float dt);
int wreck_visible = BTWreckSinkTick(this, (float)dt);
wreckSmokeTimer -= dt;
if (wreckSmokeTimer <= 0.0f)
if (wreck_visible && wreckSmokeTimer <= 0.0f)
{
wreckSmokeTimer = 10.0f; // DDTHSMK's release window
extern void BTStartPfx(int effect_number, float x, float y, float z);