From 8053cc60ec4ff0ae1a6e7394308028f4ad2cb8ab Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 16:25:01 +0200
Subject: [PATCH 1/6] Decouple projectile logic position from visual render
 update

---
 .../GameEngine/Include/Common/GameEngine.h    |  3 ++
 .../GameEngine/Include/GameClient/Drawable.h  |  4 ++
 .../GameLogic/Module/DumbProjectileBehavior.h |  2 +
 .../GameLogic/Module/NeutronMissileUpdate.h   |  2 +
 .../Include/GameLogic/Module/UpdateModule.h   |  1 +
 .../GameEngine/Source/GameClient/Drawable.cpp | 38 +++++++++++++++++++
 .../Behavior/DumbProjectileBehavior.cpp       | 13 +++++++
 .../Object/Update/NeutronMissileUpdate.cpp    | 13 +++++++
 8 files changed, 76 insertions(+)

diff --git a/GeneralsMD/Code/GameEngine/Include/Common/GameEngine.h b/GeneralsMD/Code/GameEngine/Include/Common/GameEngine.h
index f86fd8d38e5..2e012b597f7 100644
--- a/GeneralsMD/Code/GameEngine/Include/Common/GameEngine.h
+++ b/GeneralsMD/Code/GameEngine/Include/Common/GameEngine.h
@@ -101,6 +101,9 @@ class GameEngine : public SubsystemInterface
 
 	Bool m_quitting; ///< true when we need to quit the game
 	Bool m_isActive; ///< app has OS focus.
+
+public:
+	Real getLogicTimeAccumulator() const { return m_logicTimeAccumulator; }
 };
 
 inline void GameEngine::setQuitting( Bool quitting ) { m_quitting = quitting; }
diff --git a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
index e0e4707f93c..75e0e665c80 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
@@ -48,6 +48,7 @@ class DrawModule;
 class ClientUpdateModule;
 class View;
 class Locomotor;
+class ProjectileUpdateInterface;
 class Anim2D;
 class Shadow;
 class ModuleInfo;
@@ -652,6 +653,7 @@ class Drawable : public Thing,
 private:
 
 	const Locomotor* getLocomotor() const;
+	void applySubFrameExtrapolation(ProjectileUpdateInterface* pui);
 
 	// note, these are lazily allocated!
 	TintEnvelope*		m_selectionFlashEnvelope;	///< used for selection flash, works WITH m_colorTintEnvelope
@@ -711,6 +713,7 @@ class Drawable : public Thing,
 
 	Matrix3D m_instance;				///< The instance matrix that holds the initial/default position & orientation
 	Real m_instanceScale;				///< the uniform scale factor applied to the instance matrix before it is sent to W3D.
+	Matrix3D m_visualExtrapolationMtx;  ///< Decoupled visual glide matrix
 
 	DrawableInfo				m_drawableInfo;		///< structure pointed to by W3D render objects so they know which drawable they belong to.
 
@@ -730,6 +733,7 @@ class Drawable : public Thing,
 	Bool m_hiddenByStealth;			///< drawable is hidden due to stealth
 	Bool m_instanceIsIdentity;	///< If true, instance matrix can be skipped
 	Bool m_drawableFullyObscuredByShroud;	///<drawable is hidden by shroud/fog
+	Bool m_useExtrapolation;            ///< True if currently gliding
   Bool m_ambientSoundEnabled;
   Bool m_ambientSoundEnabledFromScript;
 
diff --git a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
index 4e7a5237acc..f8dd4e1e629 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
@@ -94,6 +94,7 @@ class DumbProjectileBehavior : public UpdateModule, public ProjectileUpdateInter
 	virtual ObjectID projectileGetLauncherID() const override { return m_launcherID; }
 	virtual void setFramesTillCountermeasureDiversionOccurs( UnsignedInt frames ) override {}
 	virtual void projectileNowJammed() override {}
+	virtual const Coord3D* getProjectileLogicVelocity() const override { return &m_logicStepVelocity; }
 
 protected:
 
@@ -109,6 +110,7 @@ class DumbProjectileBehavior : public UpdateModule, public ProjectileUpdateInter
 	VecCoord3D						m_flightPath;							///< The frame by frame flight path in a Bezier curve
 	Coord3D								m_flightPathStart;				///< where flight path started (in case we must regen it)
 	Coord3D								m_flightPathEnd;					///< where flight path ends (in case we must regen it)
+	Coord3D								m_logicStepVelocity;			///< Logic frame velocity vector
 	Real									m_flightPathSpeed;				///< flight path speed (in case we must regen it)
 	Int										m_flightPathSegments;			///< number of segments in the flightpath (in case we must regen it)
 	Int										m_currentFlightPathStep;	///< Our current index in the flight path vector.  Quicker than popping off.
diff --git a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/NeutronMissileUpdate.h b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/NeutronMissileUpdate.h
index 27332ebf6b6..d709b411ff8 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/NeutronMissileUpdate.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/NeutronMissileUpdate.h
@@ -103,6 +103,7 @@ class NeutronMissileUpdate : public UpdateModule,
 	virtual const Coord3D *getVelocity() const { return &m_vel; }		///< get current velocity
 	virtual void setFramesTillCountermeasureDiversionOccurs( UnsignedInt frames ) override {}
 	virtual void projectileNowJammed() override {}
+	virtual const Coord3D* getProjectileLogicVelocity() const override { return &m_logicStepVelocity; }
 
 	virtual UpdateSleepTime update() override;
 	virtual void onDelete() override;
@@ -119,6 +120,7 @@ class NeutronMissileUpdate : public UpdateModule,
 
 	Coord3D m_accel;
 	Coord3D m_vel;
+	Coord3D m_logicStepVelocity;						///< Logic frame velocity vector
 
 	UnsignedInt m_stateTimestamp;				///< time of state change
 	Bool m_isLaunched;
diff --git a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/UpdateModule.h b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/UpdateModule.h
index b38389eaced..e400267acb2 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/UpdateModule.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/UpdateModule.h
@@ -266,6 +266,7 @@ class ProjectileUpdateInterface
 	virtual Bool projectileHandleCollision(Object *other) = 0;
 	virtual void setFramesTillCountermeasureDiversionOccurs( UnsignedInt frames ) = 0; ///< Number of frames till missile diverts to countermeasures.
 	virtual void projectileNowJammed() = 0;
+	virtual const Coord3D* getProjectileLogicVelocity() const { return nullptr; }
 };
 
 //-------------------------------------------------------------------------------------------------
diff --git a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
index 40abef67afe..058257e81a9 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
@@ -38,6 +38,7 @@
 #include "Common/DrawModule.h"
 #include "Common/FramePacer.h"
 #include "Common/GameAudio.h"
+#include "Common/GameEngine.h"
 #include "Common/GameLOD.h"
 #include "Common/GameState.h"
 #include "Common/GameUtility.h"
@@ -61,6 +62,7 @@
 #include "GameLogic/Module/StealthUpdate.h"
 #include "GameLogic/Module/StickyBombUpdate.h"
 #include "GameLogic/Module/BattlePlanUpdate.h"
+#include "GameLogic/Module/UpdateModule.h"
 #include "GameLogic/ScriptEngine.h"
 #include "GameLogic/Weapon.h"
 
@@ -412,6 +414,8 @@ Drawable::Drawable( const ThingTemplate *thingTemplate, DrawableStatusBits statu
 	//Real scaleFuzziness = thingTemplate->getInstanceScaleFuzziness();
 	//Real fuzzyScale = ( 1.0f + GameClientRandomValueReal( -scaleFuzziness, scaleFuzziness ));
 	m_instanceScale = thingTemplate->getAssetScale();// * fuzzyScale;
+	m_useExtrapolation = FALSE;
+	m_visualExtrapolationMtx.Make_Identity();
 
 	// initially not bound to an object
 	m_object = nullptr;
@@ -1149,6 +1153,18 @@ void Drawable::updateDrawable()
 	UnsignedInt now = TheGameLogic->getFrame();
 	Object *obj = getObject();
 
+	if (obj)
+	{
+		for (BehaviorModule** m = obj->getBehaviorModules(); m && *m; ++m)
+		{
+			if (ProjectileUpdateInterface* pui = (*m)->getProjectileUpdateInterface())
+			{
+				applySubFrameExtrapolation(pui);
+				break;
+			}
+		}
+	}
+
 	{
 		for (ClientUpdateModule** cu = getClientUpdateModules(); cu && *cu; ++cu)
 		{
@@ -4248,6 +4264,11 @@ void Drawable::setInstanceMatrix( const Matrix3D *instance )
 //-------------------------------------------------------------------------------------------------
 const Matrix3D *Drawable::getTransformMatrix() const
 {
+	if (m_useExtrapolation)
+	{
+		return &m_visualExtrapolationMtx;
+	}
+
 	const Object *obj = getObject();
 
 	if (obj)
@@ -5643,3 +5664,20 @@ void TintEnvelope::loadPostProcess()
 
 }
 
+
+void Drawable::applySubFrameExtrapolation(ProjectileUpdateInterface* pui)
+{
+	const Coord3D* v = pui->getProjectileLogicVelocity();
+	Real alpha = TheGameEngine->getLogicTimeAccumulator() * TheFramePacer->getActualLogicTimeScaleFps();
+
+	if (v && alpha > 0.0f && m_object)
+	{
+		m_visualExtrapolationMtx = *m_object->getTransformMatrix();
+		m_visualExtrapolationMtx.Adjust_Translation(*(Vector3*)v * (alpha > 1.0f ? 1.0f : alpha));
+		m_useExtrapolation = TRUE;
+	}
+	else
+	{
+		m_useExtrapolation = FALSE;
+	}
+}
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
index 1c5fcb77dc8..8aa3de06c2d 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
@@ -121,6 +121,7 @@ DumbProjectileBehavior::DumbProjectileBehavior( Thing *thing, const ModuleData*
 	m_extraBonusFlags = 0;
 
   m_hasDetonated = FALSE;
+  m_logicStepVelocity.zero();
 }
 
 //-------------------------------------------------------------------------------------------------
@@ -579,6 +580,8 @@ void DumbProjectileBehavior::detonate()
 UpdateSleepTime DumbProjectileBehavior::update()
 {
 	const DumbProjectileBehaviorModuleData* d = getDumbProjectileBehaviorModuleData();
+	m_logicStepVelocity.zero();
+	Coord3D oldPos = *getObject()->getPosition();
 
 	if (m_lifespanFrame != 0 && TheGameLogic->getFrame() >= m_lifespanFrame)
 	{
@@ -714,6 +717,16 @@ UpdateSleepTime DumbProjectileBehavior::update()
 
 	++m_currentFlightPathStep;
 
+	if (m_currentFlightPathStep < (Int)m_flightPath.size())
+	{
+		m_logicStepVelocity = m_flightPath[m_currentFlightPathStep];
+		m_logicStepVelocity.sub( &flightStep ); // flightStep is currentPos
+	}
+	else
+	{
+		m_logicStepVelocity.zero();
+	}
+
 	return UPDATE_SLEEP_NONE;//This no longer flys with physics, so it needs to not sleep
 }
 
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
index 62de8b3f53c..5cc051d338f 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
@@ -125,6 +125,7 @@ NeutronMissileUpdate::NeutronMissileUpdate( Thing *thing, const ModuleData* modu
 	m_frameAtLaunch = 0;
 
 	m_exhaustSysTmpl = nullptr;
+	m_logicStepVelocity.zero();
 
 }
 
@@ -255,6 +256,7 @@ void NeutronMissileUpdate::doLaunch()
 
 	// fall
 	Coord3D pos = *getObject()->getPosition();
+	Coord3D oldPos = pos;
 
 	pos.x += m_vel.x;
 	pos.y += m_vel.y;
@@ -262,6 +264,8 @@ void NeutronMissileUpdate::doLaunch()
 
 	getObject()->setPosition( &pos );
 
+	m_logicStepVelocity = m_vel;
+
 	FXList::doFXObj(getNeutronMissileUpdateModuleData()->m_ignitionFX, getObject());
 
 	if (m_exhaustSysTmpl != nullptr)
@@ -335,6 +339,7 @@ void NeutronMissileUpdate::doAttack()
 {
 	Matrix3D mx;
 	Real speed = getNeutronMissileUpdateModuleData()->m_relativeSpeed;
+	Coord3D oldPos = *getObject()->getPosition();
 
 	if (getNeutronMissileUpdateModuleData()->m_targetFromDirectlyAbove && m_reachedIntermediatePos)
 		speed *= STRAIGHT_DOWN_SLOW_FACTOR;
@@ -423,6 +428,8 @@ void NeutronMissileUpdate::doAttack()
 	getObject()->setTransformMatrix( &mx );
 	getObject()->setPosition( &pos );
 
+	m_logicStepVelocity = m_vel;
+	m_logicStepVelocity.add( &m_accel );
 }
 
 //-------------------------------------------------------------------------------------------------
@@ -526,6 +533,12 @@ UpdateSleepTime NeutronMissileUpdate::update()
 		normal.z = -1.0f;
 		getObject()->onCollide(nullptr, getObject()->getPosition(), &normal);
 	}
+
+	if (m_state == DEAD)
+	{
+		m_logicStepVelocity.zero();
+	}
+
 	return UPDATE_SLEEP_NONE;
 }
 

From 96ac62722bc8f6b8b3d32459ec3a472e10aac348 Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 16:41:50 +0200
Subject: [PATCH 2/6] removed unused oldpos

---
 .../Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp | 1 -
 .../Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp     | 2 --
 2 files changed, 3 deletions(-)

diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
index 8aa3de06c2d..65d62d4609c 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
@@ -581,7 +581,6 @@ UpdateSleepTime DumbProjectileBehavior::update()
 {
 	const DumbProjectileBehaviorModuleData* d = getDumbProjectileBehaviorModuleData();
 	m_logicStepVelocity.zero();
-	Coord3D oldPos = *getObject()->getPosition();
 
 	if (m_lifespanFrame != 0 && TheGameLogic->getFrame() >= m_lifespanFrame)
 	{
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
index 5cc051d338f..b47e0930c7a 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
@@ -256,7 +256,6 @@ void NeutronMissileUpdate::doLaunch()
 
 	// fall
 	Coord3D pos = *getObject()->getPosition();
-	Coord3D oldPos = pos;
 
 	pos.x += m_vel.x;
 	pos.y += m_vel.y;
@@ -339,7 +338,6 @@ void NeutronMissileUpdate::doAttack()
 {
 	Matrix3D mx;
 	Real speed = getNeutronMissileUpdateModuleData()->m_relativeSpeed;
-	Coord3D oldPos = *getObject()->getPosition();
 
 	if (getNeutronMissileUpdateModuleData()->m_targetFromDirectlyAbove && m_reachedIntermediatePos)
 		speed *= STRAIGHT_DOWN_SLOW_FACTOR;

From 1f1fcc87c658d8f2d280daba932de2df70d903c2 Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 19:47:56 +0200
Subject: [PATCH 3/6] use explicit construction and fix alignment

---
 GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h  | 2 +-
 GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
index 75e0e665c80..f601ae78b1d 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
@@ -733,7 +733,7 @@ class Drawable : public Thing,
 	Bool m_hiddenByStealth;			///< drawable is hidden due to stealth
 	Bool m_instanceIsIdentity;	///< If true, instance matrix can be skipped
 	Bool m_drawableFullyObscuredByShroud;	///<drawable is hidden by shroud/fog
-	Bool m_useExtrapolation;            ///< True if currently gliding
+	Bool m_useExtrapolation;				///< True if currently gliding
   Bool m_ambientSoundEnabled;
   Bool m_ambientSoundEnabledFromScript;
 
diff --git a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
index 058257e81a9..abc9b80a3a4 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
@@ -5673,7 +5673,7 @@ void Drawable::applySubFrameExtrapolation(ProjectileUpdateInterface* pui)
 	if (v && alpha > 0.0f && m_object)
 	{
 		m_visualExtrapolationMtx = *m_object->getTransformMatrix();
-		m_visualExtrapolationMtx.Adjust_Translation(*(Vector3*)v * (alpha > 1.0f ? 1.0f : alpha));
+		m_visualExtrapolationMtx.Adjust_Translation(Vector3(v->x, v->y, v->z) * (alpha > 1.0f ? 1.0f : alpha));
 		m_useExtrapolation = TRUE;
 	}
 	else

From a9e7bfcbe79493fa61389cc1f229d4f4b43fe36d Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 20:14:06 +0200
Subject: [PATCH 4/6] prepared applySubFrameExtrapolation for future decoupling

---
 GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h  | 2 +-
 GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp | 5 ++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
index f601ae78b1d..426b4e6277a 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
@@ -653,7 +653,7 @@ class Drawable : public Thing,
 private:
 
 	const Locomotor* getLocomotor() const;
-	void applySubFrameExtrapolation(ProjectileUpdateInterface* pui);
+	void applySubFrameExtrapolation(const Coord3D* velocity);
 
 	// note, these are lazily allocated!
 	TintEnvelope*		m_selectionFlashEnvelope;	///< used for selection flash, works WITH m_colorTintEnvelope
diff --git a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
index abc9b80a3a4..2d9ff94537a 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
@@ -1159,7 +1159,7 @@ void Drawable::updateDrawable()
 		{
 			if (ProjectileUpdateInterface* pui = (*m)->getProjectileUpdateInterface())
 			{
-				applySubFrameExtrapolation(pui);
+				applySubFrameExtrapolation(pui->getProjectileLogicVelocity());
 				break;
 			}
 		}
@@ -5665,9 +5665,8 @@ void TintEnvelope::loadPostProcess()
 }
 
 
-void Drawable::applySubFrameExtrapolation(ProjectileUpdateInterface* pui)
+void Drawable::applySubFrameExtrapolation(const Coord3D* v)
 {
-	const Coord3D* v = pui->getProjectileLogicVelocity();
 	Real alpha = TheGameEngine->getLogicTimeAccumulator() * TheFramePacer->getActualLogicTimeScaleFps();
 
 	if (v && alpha > 0.0f && m_object)

From 8029415d2b489f671b566f0ba4d8e188a175a693 Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 20:22:50 +0200
Subject: [PATCH 5/6] fix NeutronMissileUpdate overcompensation at start of
 launch

---
 .../Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp      | 1 -
 1 file changed, 1 deletion(-)

diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
index b47e0930c7a..c966752dcb6 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
@@ -427,7 +427,6 @@ void NeutronMissileUpdate::doAttack()
 	getObject()->setPosition( &pos );
 
 	m_logicStepVelocity = m_vel;
-	m_logicStepVelocity.add( &m_accel );
 }
 
 //-------------------------------------------------------------------------------------------------

From be62f3b022baaea8190b554e33a0137d1e31e0e3 Mon Sep 17 00:00:00 2001
From: githubawn <115191165+githubawn@users.noreply.github.com>
Date: Mon, 13 Apr 2026 20:50:04 +0200
Subject: [PATCH 6/6] added caching

---
 .../GameEngine/Include/GameClient/Drawable.h  |  5 +++++
 .../GameLogic/Module/DumbProjectileBehavior.h |  1 +
 .../GameEngine/Source/GameClient/Drawable.cpp | 21 +++++++++++--------
 .../Behavior/DumbProjectileBehavior.cpp       |  8 +++++++
 .../Object/Update/NeutronMissileUpdate.cpp    |  4 ++++
 5 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
index 426b4e6277a..bbd315ea7af 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameClient/Drawable.h
@@ -734,11 +734,16 @@ class Drawable : public Thing,
 	Bool m_instanceIsIdentity;	///< If true, instance matrix can be skipped
 	Bool m_drawableFullyObscuredByShroud;	///<drawable is hidden by shroud/fog
 	Bool m_useExtrapolation;				///< True if currently gliding
+	const Coord3D* m_logicVelocityPtr;		///< Cached pointer to logic velocity for smoothing
   Bool m_ambientSoundEnabled;
   Bool m_ambientSoundEnabledFromScript;
 
   Bool m_receivesDynamicLights;
 
+public:
+	void setLogicVelocity(const Coord3D* velocity);
+	static void clearLogicVelocity(Object* obj);
+
 #ifdef DIRTY_CONDITION_FLAGS
 	Bool m_isModelDirty;				///< if true, must call replaceModelConditionState() before drawing or accessing drawmodule info
 #endif
diff --git a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
index f8dd4e1e629..2d88bc3c153 100644
--- a/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
+++ b/GeneralsMD/Code/GameEngine/Include/GameLogic/Module/DumbProjectileBehavior.h
@@ -84,6 +84,7 @@ class DumbProjectileBehavior : public UpdateModule, public ProjectileUpdateInter
 
 	// UpdateModuleInterface
 	virtual UpdateSleepTime update() override;
+	virtual void onDelete() override;
 	virtual ProjectileUpdateInterface* getProjectileUpdateInterface() override { return this; }
 
 	// ProjectileUpdateInterface
diff --git a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
index 2d9ff94537a..b2db94bb93b 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameClient/Drawable.cpp
@@ -416,6 +416,7 @@ Drawable::Drawable( const ThingTemplate *thingTemplate, DrawableStatusBits statu
 	m_instanceScale = thingTemplate->getAssetScale();// * fuzzyScale;
 	m_useExtrapolation = FALSE;
 	m_visualExtrapolationMtx.Make_Identity();
+	m_logicVelocityPtr = nullptr;
 
 	// initially not bound to an object
 	m_object = nullptr;
@@ -1153,16 +1154,9 @@ void Drawable::updateDrawable()
 	UnsignedInt now = TheGameLogic->getFrame();
 	Object *obj = getObject();
 
-	if (obj)
+	if (m_logicVelocityPtr != nullptr)
 	{
-		for (BehaviorModule** m = obj->getBehaviorModules(); m && *m; ++m)
-		{
-			if (ProjectileUpdateInterface* pui = (*m)->getProjectileUpdateInterface())
-			{
-				applySubFrameExtrapolation(pui->getProjectileLogicVelocity());
-				break;
-			}
-		}
+		applySubFrameExtrapolation(m_logicVelocityPtr);
 	}
 
 	{
@@ -5663,7 +5657,16 @@ void TintEnvelope::loadPostProcess()
 {
 
 }
+void Drawable::setLogicVelocity(const Coord3D* velocity) 
+{ 
+	m_logicVelocityPtr = velocity; 
+}
 
+void Drawable::clearLogicVelocity(Object* obj)
+{
+	if (obj && obj->getDrawable())
+		obj->getDrawable()->setLogicVelocity(nullptr);
+}
 
 void Drawable::applySubFrameExtrapolation(const Coord3D* v)
 {
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
index 65d62d4609c..e99fa3311a5 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Behavior/DumbProjectileBehavior.cpp
@@ -396,6 +396,8 @@ void DumbProjectileBehavior::projectileFireAtObjectOrPosition( const Object *vic
 		return;
 	}
 	m_currentFlightPathStep = 0;// We are at the first point, because the launching put us there
+	if (projectile->getDrawable())
+		projectile->getDrawable()->setLogicVelocity(&m_logicStepVelocity);
 }
 
 //-------------------------------------------------------------------------------------------------
@@ -573,6 +575,12 @@ void DumbProjectileBehavior::detonate()
 
 }
 
+void DumbProjectileBehavior::onDelete()
+{
+	Drawable::clearLogicVelocity(getObject());
+	UpdateModule::onDelete();
+}
+
 //-------------------------------------------------------------------------------------------------
 /**
  * Simulate one frame of a missile's behavior
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
index c966752dcb6..8d775c60dee 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/Object/Update/NeutronMissileUpdate.cpp
@@ -138,6 +138,8 @@ NeutronMissileUpdate::~NeutronMissileUpdate()
 //-------------------------------------------------------------------------------------------------
 void NeutronMissileUpdate::onDelete()
 {
+	Drawable::clearLogicVelocity(getObject());
+	UpdateModule::onDelete();
 }
 
 //-------------------------------------------------------------------------------------------------
@@ -244,6 +246,8 @@ void NeutronMissileUpdate::doLaunch()
 		getObject()->getExperienceTracker()->setExperienceSink( m_launcherID );
 
 		m_isLaunched = true;
+		if (getObject()->getDrawable())
+			getObject()->getDrawable()->setLogicVelocity(&m_logicStepVelocity);
 
 		if (getNeutronMissileUpdateModuleData()->m_targetFromDirectlyAbove)
 			m_reachedIntermediatePos = false;