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fix(physics): write the construction cheat block only when changed

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Live wrote the controllable-physics cheat block (gravity scale, speed
multiplier) in a construction only when one of them differed from 1: 216 of
20,617 constructions had it (players at run speed 1.05 / 1.5 / 2.0 / 0.5,
enemies with gravity 0), never 1 and 1. DLU wrote it in every construction.
Serializations are unchanged.

Test: ReplicaConstructionTest.ControllablePhysicsConstructionWritesCheatsOnlyWhenChanged.

Check in game: with a second player watching, use a speed boost (or /setspeed)
and zone in while boosted; the other player sees you move at the right
speed. Enemies with gravity 0 (e.g. Sentinel Turret 6254) behave as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-29 05:17:29 -05:00
parent 52f91f307d
commit c0dcb66f1c
2 changed files with 33 additions and 2 deletions
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6
dGame/dComponents/ControllablePhysicsComponent.cpp
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@@ -97,8 +97,10 @@ void ControllablePhysicsComponent::Serialize(RakNet::BitStream& outBitStream, bo
outBitStream.Write(m_ImmuneToStunInteractCount);
}
outBitStream.Write(m_DirtyCheats || bIsInitialUpdate);
if (m_DirtyCheats || bIsInitialUpdate) {
// Live wrote the cheat block on construction only when the gravity or speed was changed from 1.
const bool writeCheats = bIsInitialUpdate ? (m_GravityScale != 1.0f || m_SpeedMultiplier != 1.0f) : m_DirtyCheats;
outBitStream.Write(writeCheats);
if (writeCheats) {
outBitStream.Write(m_GravityScale);
outBitStream.Write(m_SpeedMultiplier);