9 files changed, 132 insertions, 176 deletions

diff --git a/src/core/Stats.h b/src/core/Stats.h
index 4445ecf4..ae3c0cb4 100644
--- a/src/core/Stats.h
+++ b/src/core/Stats.h
@@ -10,7 +10,7 @@ public:
 		TOTAL_HIGHEST_SCORES = 16
 	};
 	static int32 DaysPassed;
-    static int32 HeadsPopped;
+	static int32 HeadsPopped;
 	static int32 CommercialPassed;
 	static int32 IndustrialPassed;
 	static int32 SuburbanPassed;
@@ -52,14 +52,14 @@ public:
 	static int32 LongestFlightInDodo;
 	static int32 TimeTakenDefuseMission;
 	static int32 TotalNumberKillFrenzies;
-    static int32 TotalNumberMissions;
-    static int32 RoundsFiredByPlayer;
-    static int32 KgsOfExplosivesUsed;
-    static int32 InstantHitsFiredByPlayer;
-    static int32 InstantHitsHitByPlayer;
-    static int32 BestTimeBombDefusal;
-    static int32 mmRain;
-    static int32 CarsCrushed;
+	static int32 TotalNumberMissions;
+	static int32 RoundsFiredByPlayer;
+	static int32 KgsOfExplosivesUsed;
+	static int32 InstantHitsFiredByPlayer;
+	static int32 InstantHitsHitByPlayer;
+	static int32 BestTimeBombDefusal;
+	static int32 mmRain;
+	static int32 CarsCrushed;
 	static int32 FastestTimes[TOTAL_FASTEST_TIMES];
 	static int32 HighestScores[TOTAL_HIGHEST_SCORES];
 
diff --git a/src/core/SurfaceTable.cpp b/src/core/SurfaceTable.cpp
index 08a84cfd..e4f9c0cd 100644
--- a/src/core/SurfaceTable.cpp
+++ b/src/core/SurfaceTable.cpp
@@ -56,40 +56,40 @@ int
 CSurfaceTable::GetAdhesionGroup(uint8 surfaceType)
 {
 	switch(surfaceType){
-	case SURFACE_0:		return ADHESIVE_ROAD;
-	case SURFACE_1:		return ADHESIVE_ROAD;
-	case SURFACE_2:		return ADHESIVE_LOOSE;
-	case SURFACE_3:		return ADHESIVE_LOOSE;
-	case SURFACE_4:		return ADHESIVE_HARD;
-	case SURFACE_5:		return ADHESIVE_ROAD;
-	case SURFACE_6:		return ADHESIVE_HARD;
-	case SURFACE_7:		return ADHESIVE_HARD;
-	case SURFACE_8:		return ADHESIVE_HARD;
-	case SURFACE_9:		return ADHESIVE_HARD;
-	case SURFACE_10:	return ADHESIVE_HARD;
-	case SURFACE_11:	return ADHESIVE_HARD;
-	case SURFACE_12:	return ADHESIVE_HARD;
-	case SURFACE_13:	return ADHESIVE_HARD;
-	case SURFACE_14:	return ADHESIVE_HARD;
-	case SURFACE_15:	return ADHESIVE_HARD;
-	case SURFACE_16:	return ADHESIVE_HARD;
-	case SURFACE_17:	return ADHESIVE_RUBBER;
-	case SURFACE_18:	return ADHESIVE_LOOSE;
-	case SURFACE_19:	return ADHESIVE_WET;
-	case SURFACE_20:	return ADHESIVE_ROAD;
-	case SURFACE_21:	return ADHESIVE_ROAD;
-	case SURFACE_22:	return ADHESIVE_ROAD;
-	case SURFACE_23:	return ADHESIVE_RUBBER;
-	case SURFACE_24:	return ADHESIVE_HARD;
-	case SURFACE_25:	return ADHESIVE_LOOSE;
-	case SURFACE_26:	return ADHESIVE_LOOSE;
-	case SURFACE_27:	return ADHESIVE_HARD;
-	case SURFACE_28:	return ADHESIVE_HARD;
-	case SURFACE_29:	return ADHESIVE_RUBBER;
-	case SURFACE_30:	return ADHESIVE_LOOSE;
-	case SURFACE_31:	return ADHESIVE_HARD;
-	case SURFACE_32:	return ADHESIVE_HARD;
-	default:		return ADHESIVE_ROAD;
+	case SURFACE_DEFAULT:		return ADHESIVE_ROAD;
+	case SURFACE_TARMAC:		return ADHESIVE_ROAD;
+	case SURFACE_GRASS:		return ADHESIVE_LOOSE;
+	case SURFACE_DIRT:		return ADHESIVE_LOOSE;
+	case SURFACE_DIRTTRACK:		return ADHESIVE_HARD;
+	case SURFACE_PAVEMENT:		return ADHESIVE_ROAD;
+	case SURFACE_METAL6:		return ADHESIVE_HARD;
+	case SURFACE_GLASS:		return ADHESIVE_HARD;
+	case SURFACE_SCAFFOLD:		return ADHESIVE_HARD;
+	case SURFACE_METAL_DOOR:	return ADHESIVE_HARD;
+	case SURFACE_BILLBOARD:		return ADHESIVE_HARD;
+	case SURFACE_STEEL:		return ADHESIVE_HARD;
+	case SURFACE_METAL_POLE:	return ADHESIVE_HARD;
+	case SURFACE_STREET_LIGHT:	return ADHESIVE_HARD;
+	case SURFACE_METAL14:		return ADHESIVE_HARD;
+	case SURFACE_METAL15:		return ADHESIVE_HARD;
+	case SURFACE_METAL_FENCE:	return ADHESIVE_HARD;
+	case SURFACE_FLESH:		return ADHESIVE_RUBBER;
+	case SURFACE_SAND:		return ADHESIVE_LOOSE;
+	case SURFACE_PUDDLE:		return ADHESIVE_WET;
+	case SURFACE_WOOD:		return ADHESIVE_ROAD;
+	case SURFACE_WOOD_BOX:		return ADHESIVE_ROAD;
+	case SURFACE_WOOD_PLANK:	return ADHESIVE_ROAD;
+	case SURFACE_TIRE:		return ADHESIVE_RUBBER;
+	case SURFACE_HARD24:		return ADHESIVE_HARD;
+	case SURFACE_HEDGE:		return ADHESIVE_LOOSE;
+	case SURFACE_STONE:		return ADHESIVE_LOOSE;
+	case SURFACE_METAL27:		return ADHESIVE_HARD;
+	case SURFACE_METAL28:		return ADHESIVE_HARD;
+	case SURFACE_RUBBER29:		return ADHESIVE_RUBBER;
+	case SURFACE_LOOSE30:		return ADHESIVE_LOOSE;
+	case SURFACE_BOLLARD:		return ADHESIVE_HARD;
+	case SURFACE_GATE:		return ADHESIVE_HARD;
+	default:			return ADHESIVE_ROAD;
 	}
 }
 
@@ -97,38 +97,38 @@ float
 CSurfaceTable::GetWetMultiplier(uint8 surfaceType)
 {
 	switch(surfaceType){
-	case SURFACE_0:
-	case SURFACE_1:
-	case SURFACE_4:
-	case SURFACE_5:
-	case SURFACE_8:
-	case SURFACE_20:
-	case SURFACE_21:
-	case SURFACE_22:
-	case SURFACE_25:
-	case SURFACE_30:
-	case SURFACE_31:
+	case SURFACE_DEFAULT:
+	case SURFACE_TARMAC:
+	case SURFACE_DIRTTRACK:
+	case SURFACE_PAVEMENT:
+	case SURFACE_SCAFFOLD:
+	case SURFACE_WOOD:
+	case SURFACE_WOOD_BOX:
+	case SURFACE_WOOD_PLANK:
+	case SURFACE_HEDGE:
+	case SURFACE_LOOSE30:
+	case SURFACE_BOLLARD:
 		return 1.0f - CWeather::WetRoads*0.25f;
 
-	case SURFACE_2:
-	case SURFACE_6:
-	case SURFACE_7:
-	case SURFACE_9:
-	case SURFACE_10:
-	case SURFACE_11:
-	case SURFACE_12:
-	case SURFACE_13:
-	case SURFACE_14:
-	case SURFACE_15:
-	case SURFACE_16:
-	case SURFACE_17:
-	case SURFACE_23:
-	case SURFACE_24:
-	case SURFACE_26:
-	case SURFACE_27:
-	case SURFACE_28:
-	case SURFACE_29:
-	case SURFACE_32:
+	case SURFACE_GRASS:
+	case SURFACE_METAL6:
+	case SURFACE_GLASS:
+	case SURFACE_METAL_DOOR:
+	case SURFACE_BILLBOARD:
+	case SURFACE_STEEL:
+	case SURFACE_METAL_POLE:
+	case SURFACE_STREET_LIGHT:
+	case SURFACE_METAL14:
+	case SURFACE_METAL15:
+	case SURFACE_METAL_FENCE:
+	case SURFACE_FLESH:
+	case SURFACE_TIRE:
+	case SURFACE_HARD24:
+	case SURFACE_STONE:
+	case SURFACE_METAL27:
+	case SURFACE_METAL28:
+	case SURFACE_RUBBER29:
+	case SURFACE_GATE:
 		return 1.0f - CWeather::WetRoads*0.4f;
 
 	default:
diff --git a/src/core/SurfaceTable.h b/src/core/SurfaceTable.h
index 12246dce..768521bf 100644
--- a/src/core/SurfaceTable.h
+++ b/src/core/SurfaceTable.h
@@ -1,47 +1,6 @@
 #pragma once
 
-
-enum
-{
-	SURFACE_0,
-	SURFACE_1,
-	SURFACE_2,
-	SURFACE_3,
-	SURFACE_4,
-	SURFACE_5,
-	SURFACE_6,
-	SURFACE_7,
-	SURFACE_8,
-	SURFACE_9,
-	SURFACE_10,
-	SURFACE_11,
-	SURFACE_12,
-	SURFACE_13,
-	SURFACE_14,
-	SURFACE_15,
-	SURFACE_16,
-	SURFACE_17,
-	SURFACE_18,
-	SURFACE_19,
-	SURFACE_20,
-	SURFACE_21,
-	SURFACE_22,
-	SURFACE_23,
-	SURFACE_24,
-	SURFACE_25,
-	SURFACE_26,
-	SURFACE_27,
-	SURFACE_28,
-	SURFACE_29,
-	SURFACE_30,
-	SURFACE_31,
-	SURFACE_32,
-
-	NUMSURFACETYPES
-};
-
-// From nick
-// TODO: check and use this
+// TODO: check this
 enum eSurfaceType
 {
 	SURFACE_DEFAULT,
diff --git a/src/core/Timer.h b/src/core/Timer.h
index 004cda4d..e7b6fec8 100644
--- a/src/core/Timer.h
+++ b/src/core/Timer.h
@@ -58,7 +58,7 @@ public:
 	friend bool GenericSave(int file);
 
 #ifdef FIX_BUGS
-	static float GetDefaultTimeStep(void) { return 5.0f / 3.0f; }
+	static float GetDefaultTimeStep(void) { return 50.0f / 30.0f; }
 	static float GetTimeStepFix(void) { return GetTimeStep() / GetDefaultTimeStep(); }
 #endif
 };
diff --git a/src/entities/Physical.cpp b/src/entities/Physical.cpp
index 31f8fcbc..f9f8ae7e 100644
--- a/src/entities/Physical.cpp
+++ b/src/entities/Physical.cpp
@@ -45,9 +45,9 @@ CPhysical::CPhysical(void)
 
 	bUsesCollision = true;
 	m_audioEntityId = -5;
-	unk1 = 100.0f;
+	m_phys_unused1 = 100.0f;
 	m_vecCentreOfMass = CVector(0.0f, 0.0f, 0.0f);
-	field_EC = 0;
+	m_phys_unused2 = 0;
 
 	bIsHeavy = false;
 	bAffectedByGravity = true;
@@ -527,26 +527,26 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 	bool ispedcontactA = false;
 	bool ispedcontactB = false;
 
-	float timestepA;
+	float massFactorA;
 	if(B->bPedPhysics){
-		timestepA = 10.0f;
+		massFactorA = 10.0f;
 		if(B->IsPed() && ((CPed*)B)->m_pCurrentPhysSurface == A)
 			ispedcontactA = true;
 	}else
-		timestepA = A->bIsHeavy ? 2.0f : 1.0f;
+		massFactorA = A->bIsHeavy ? 2.0f : 1.0f;
 
-	float timestepB;
+	float massFactorB;
 	if(A->bPedPhysics){
 		if(A->IsPed() && ((CPed*)A)->IsPlayer() && B->IsVehicle() &&
 		   (B->GetStatus() == STATUS_ABANDONED || B->GetStatus() == STATUS_WRECKED || A->bHasHitWall))
-			timestepB = 2200.0f / B->m_fMass;
+			massFactorB = 2200.0f / B->m_fMass;
 		else
-			timestepB = 10.0f;
+			massFactorB = 10.0f;
 
 		if(A->IsPed() && ((CPed*)A)->m_pCurrentPhysSurface == B)
 			ispedcontactB = true;
 	}else
-		timestepB = B->bIsHeavy ? 2.0f : 1.0f;
+		massFactorB = B->bIsHeavy ? 2.0f : 1.0f;
 
 	float speedA, speedB;
 	if(B->IsStatic()){
@@ -646,14 +646,17 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 		// positive if B is moving towards A
 		// not interested in how much B moves into A apparently?
 		// only interested in cases where A collided into B
-		speedB = Max(0.0f, DotProduct(B->m_vecMoveSpeed, colpoint.normal));
+		speedB = DotProduct(B->m_vecMoveSpeed, colpoint.normal);
+		float speedSum = Max(0.0f, DotProduct(B->m_vecMoveSpeed, colpoint.normal));
 		// A has moved into B
-		if(speedA < speedB){
-			if(!A->bHasHitWall)
-				speedB -= (speedA - speedB) * (A->m_fElasticity+B->m_fElasticity)/2.0f;
-			impulseA = (speedB-speedA) * A->m_fMass * timestepA;
+		if(speedA < speedSum){
+			if(A->bHasHitWall)
+				eA = speedSum;
+			else
+				eA = speedSum - (speedA - speedSum) * (A->m_fElasticity+B->m_fElasticity)/2.0f;
+			impulseA = (eA-speedA) * A->m_fMass * massFactorA;
 			if(!A->bInfiniteMass)
-				A->ApplyMoveForce(colpoint.normal*(impulseA/timestepA));
+				A->ApplyMoveForce(colpoint.normal*(impulseA/massFactorA));
 			return true;
 		}
 	}else if(A->bPedPhysics){
@@ -661,9 +664,9 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 		speedA = DotProduct(A->m_vecMoveSpeed, colpoint.normal);
 		speedB = DotProduct(B->GetSpeed(pointposB), colpoint.normal);
 
-		float a = A->m_fMass*timestepA;
-		float b = B->GetMassTime(pointposB, colpoint.normal, timestepB);
-		float speedSum = (b*speedB + a*speedA)/(a + b);
+		float mA = A->m_fMass*massFactorA;
+		float mB = B->GetMassTweak(pointposB, colpoint.normal, massFactorB);
+		float speedSum = (mB*speedB + mA*speedA)/(mA + mB);
 		if(speedA < speedSum){
 			if(A->bHasHitWall)
 				eA = speedSum;
@@ -673,10 +676,10 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 				eB = speedSum;
 			else
 				eB = speedSum - (speedB - speedSum) * (A->m_fElasticity+B->m_fElasticity)/2.0f;
-			impulseA = (eA - speedA) * a;
-			impulseB = -(eB - speedB) * b;
-			CVector fA = colpoint.normal*(impulseA/timestepA);
-			CVector fB = colpoint.normal*(-impulseB/timestepB);
+			impulseA = (eA - speedA) * mA;
+			impulseB = -(eB - speedB) * mB;
+			CVector fA = colpoint.normal*(impulseA/massFactorA);
+			CVector fB = colpoint.normal*(-impulseB/massFactorB);
 			if(!A->bInfiniteMass){
 				if(fA.z < 0.0f) fA.z = 0.0f;
 				if(ispedcontactB){
@@ -696,9 +699,9 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 		speedA = DotProduct(A->GetSpeed(pointposA), colpoint.normal);
 		speedB = DotProduct(B->m_vecMoveSpeed, colpoint.normal);
 
-		float a = A->GetMassTime(pointposA, colpoint.normal, timestepA);
-		float b = B->m_fMass*timestepB;
-		float speedSum = (b*speedB + a*speedA)/(a + b);
+		float mA = A->GetMassTweak(pointposA, colpoint.normal, massFactorA);
+		float mB = B->m_fMass*massFactorB;
+		float speedSum = (mB*speedB + mA*speedA)/(mA + mB);
 		if(speedA < speedSum){
 			if(A->bHasHitWall)
 				eA = speedSum;
@@ -708,10 +711,10 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 				eB = speedSum;
 			else
 				eB = speedSum - (speedB - speedSum) * (A->m_fElasticity+B->m_fElasticity)/2.0f;
-			impulseA = (eA - speedA) * a;
-			impulseB = -(eB - speedB) * b;
-			CVector fA = colpoint.normal*(impulseA/timestepA);
-			CVector fB = colpoint.normal*(-impulseB/timestepB);
+			impulseA = (eA - speedA) * mA;
+			impulseB = -(eB - speedB) * mB;
+			CVector fA = colpoint.normal*(impulseA/massFactorA);
+			CVector fB = colpoint.normal*(-impulseB/massFactorB);
 			if(!A->bInfiniteMass && !ispedcontactA){
 				if(fA.z < 0.0f) fA.z = 0.0f;
 				A->ApplyMoveForce(fA);
@@ -736,9 +739,9 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 		CVector pointposB = colpoint.point - B->GetPosition();
 		speedA = DotProduct(A->GetSpeed(pointposA), colpoint.normal);
 		speedB = DotProduct(B->GetSpeed(pointposB), colpoint.normal);
-		float a = A->GetMassTime(pointposA, colpoint.normal, timestepA);
-		float b = B->GetMassTime(pointposB, colpoint.normal, timestepB);
-		float speedSum = (b*speedB + a*speedA)/(a + b);
+		float mA = A->GetMassTweak(pointposA, colpoint.normal, massFactorA);
+		float mB = B->GetMassTweak(pointposB, colpoint.normal, massFactorB);
+		float speedSum = (mB*speedB + mA*speedA)/(mA + mB);
 		if(speedA < speedSum){
 			if(A->bHasHitWall)
 				eA = speedSum;
@@ -748,10 +751,10 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 				eB = speedSum;
 			else
 				eB = speedSum - (speedB - speedSum) * (A->m_fElasticity+B->m_fElasticity)/2.0f;
-			impulseA = (eA - speedA) * a;
-			impulseB = -(eB - speedB) * b;
-			CVector fA = colpoint.normal*(impulseA/timestepA);
-			CVector fB = colpoint.normal*(-impulseB/timestepB);
+			impulseA = (eA - speedA) * mA;
+			impulseB = -(eB - speedB) * mB;
+			CVector fA = colpoint.normal*(impulseA/massFactorA);
+			CVector fB = colpoint.normal*(-impulseB/massFactorB);
 			if(A->IsVehicle() && !A->bHasHitWall){
 				fA.x *= 1.4f;
 				fA.y *= 1.4f;
@@ -767,7 +770,7 @@ CPhysical::ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, fl
 			if(B->IsVehicle() && !B->bHasHitWall){
 				fB.x *= 1.4f;
 				fB.y *= 1.4f;
-				if(colpoint.normal.z < 0.7f)
+				if(-colpoint.normal.z < 0.7f)
 					fB.z *= 0.3f;
 				if(B->GetStatus() == STATUS_PLAYER)
 					pointposB *= 0.8f;
@@ -813,7 +816,7 @@ CPhysical::ApplyCollisionAlt(CEntity *B, CColPoint &colpoint, float &impulse, CV
 		speed = GetSpeed(pointpos);
 		normalSpeed = DotProduct(speed, colpoint.normal);
 		if(normalSpeed < 0.0f){
-			float minspeed = 0.0104f * CTimer::GetTimeStep();
+			float minspeed = 1.3f*GRAVITY * CTimer::GetTimeStep();
 #ifdef GTA3_1_1_PATCH
 			if ((IsObject() || IsVehicle() && (GetUp().z < -0.3f || ((CVehicle*)this)->IsBike() && (GetStatus() == STATUS_ABANDONED || GetStatus() == STATUS_WRECKED))) &&
 #else
@@ -1015,7 +1018,7 @@ CPhysical::ApplyFriction(float adhesiveLimit, CColPoint &colpoint)
 			ApplyFrictionTurnForce(frictionDir*fImpulse, pointpos);
 
 			if(fOtherSpeed > 0.1f &&
-			   colpoint.surfaceB != SURFACE_2 && colpoint.surfaceB != SURFACE_4 &&
+			   colpoint.surfaceB != SURFACE_GRASS && colpoint.surfaceB != SURFACE_DIRTTRACK &&
 			   CSurfaceTable::GetAdhesionGroup(colpoint.surfaceA) == ADHESIVE_HARD){
 				CVector v = frictionDir * fOtherSpeed * 0.25f;
 				for(int i = 0; i < 4; i++)
@@ -1064,7 +1067,7 @@ CPhysical::ProcessShiftSectorList(CPtrList *lists)
 				canshift = true;
 			else
 				canshift = A->IsPed() &&
-					B->IsObject() && B->bInfiniteMass && !Bobj->bHasBeenDamaged;
+					B->IsObject() && B->bIsStatic && !Bobj->bHasBeenDamaged;
 			if(B == A ||
 			   B->m_scanCode == CWorld::GetCurrentScanCode() ||
 			   !B->bUsesCollision ||
@@ -1084,7 +1087,6 @@ CPhysical::ProcessShiftSectorList(CPtrList *lists)
 			  B->GetUp().z < 0.66f &&
 			  IsStreetLight(B->GetModelIndex()))
 				skipShift = true;
-// TODO: maybe flip some ifs here
 			else if(A->IsObject() && B->IsVehicle()){
 				CObject *Aobj = (CObject*)A;
 				if(Aobj->ObjectCreatedBy != TEMP_OBJECT &&
@@ -1699,16 +1701,16 @@ CPhysical::ProcessCollisionSectorList(CPtrList *lists)
 				}
 
 				if(B->IsPed() && A->IsVehicle() &&
-				   (!Bped->IsPlayer() || B->bHasHitWall && A->m_vecMoveSpeed.MagnitudeSqr() > 0.0025f))
+				   (!Bped->IsPlayer() || B->bHasHitWall && A->m_vecMoveSpeed.MagnitudeSqr() > SQR(0.05f)))
 					Bped->KillPedWithCar((CVehicle*)A, maxImpulseB);
 				else if(B->GetModelIndex() == MI_TRAIN && A->IsPed() &&
 				  (!Aped->IsPlayer() || A->bHasHitWall))
 					Aped->KillPedWithCar((CVehicle*)B, maxImpulseA*2.0f);
 				else if(B->IsObject() && B->bUsesCollision && A->IsVehicle()){
+					// BUG? not impulseA?
 					if(Bobj->m_nCollisionDamageEffect && maxImpulseB > 20.0f)
 						Bobj->ObjectDamage(maxImpulseB);
 				}else if(A->IsObject() && A->bUsesCollision && B->IsVehicle()){
-					// BUG? not impulseA?
 					if(Aobj->m_nCollisionDamageEffect && maxImpulseB > 20.0f)
 						Aobj->ObjectDamage(maxImpulseB);
 				}
@@ -1774,7 +1776,7 @@ CPhysical::ProcessShift(void)
 			m_bIsVehicleBeingShifted = true;
 
 		CEntryInfoNode *node;
-		bool hasshifted = false;	// whatever that means...
+		bool hasshifted = false;
 		for(node = m_entryInfoList.first; node; node = node->next)
 			hasshifted |= ProcessShiftSectorList(node->sector->m_lists);
 		m_bIsVehicleBeingShifted = false;
@@ -1831,7 +1833,7 @@ CPhysical::ProcessCollision(void)
 
 	int8 n = 1;	// The number of steps we divide the time step into
 	float step = 0.0f;	// divided time step
-	float distSq = GetDistanceSq();
+	float distSq = m_vecMoveSpeed.MagnitudeSqr() * sq(CTimer::GetTimeStep());
 
 	if(IsPed() && (distSq >= sq(0.2f) || ped->IsPlayer())){
 		if(ped->IsPlayer())
@@ -1920,8 +1922,11 @@ CPhysical::ProcessCollision(void)
 	bSkipLineCol = false;
 	if(!m_vecMoveSpeed.IsZero() ||
 	   !m_vecTurnSpeed.IsZero() ||
+#ifdef GTA_TRAIN
 	   bHitByTrain ||
-		GetStatus() == STATUS_PLAYER || IsPed() && ped->IsPlayer()){
+#endif
+	   GetStatus() == STATUS_PLAYER ||
+	   IsPed() && ped->IsPlayer()){
 		if(IsVehicle())
 			((CVehicle*)this)->bVehicleColProcessed = true;
 		if(CheckCollision()){
diff --git a/src/entities/Physical.h b/src/entities/Physical.h
index c84686ed..f8921a5c 100644
--- a/src/entities/Physical.h
+++ b/src/entities/Physical.h
@@ -18,7 +18,7 @@ public:
 	// The not properly indented fields haven't been checked properly yet
 
 	int32 m_audioEntityId;
-  float unk1;
+	float m_phys_unused1;
 	CTreadable *m_treadable[2];	// car and ped
 	uint32 m_nLastTimeCollided;
 	CVector m_vecMoveSpeed;		// velocity
@@ -37,7 +37,7 @@ public:
 	CEntryInfoList m_entryInfoList;
 	CPtrNode *m_movingListNode;
 
-  char field_EC;
+	int8 m_phys_unused2;
 	uint8 m_nStaticFrames;
 	uint8 m_nCollisionRecords;
 	bool m_bIsVehicleBeingShifted;
@@ -86,7 +86,6 @@ public:
 	void RemoveRefsToEntity(CEntity *ent);
 	static void PlacePhysicalRelativeToOtherPhysical(CPhysical *other, CPhysical *phys, CVector localPos);
 
-	float GetDistanceSq(void) { return m_vecMoveSpeed.MagnitudeSqr() * sq(CTimer::GetTimeStep()); }
 	// get speed of point p relative to entity center
 	CVector GetSpeed(const CVector &r);
 	CVector GetSpeed(void) { return GetSpeed(CVector(0.0f, 0.0f, 0.0f)); }
@@ -94,7 +93,7 @@ public:
 		return 1.0f / (CrossProduct(pos, dir).MagnitudeSqr()/m_fTurnMass +
 		               1.0f/m_fMass);
 	}
-	float GetMassTime(const CVector &pos, const CVector &dir, float t) {
+	float GetMassTweak(const CVector &pos, const CVector &dir, float t) {
 		return 1.0f / (CrossProduct(pos, dir).MagnitudeSqr()/(m_fTurnMass*t) +
 		               1.0f/(m_fMass*t));
 	}
diff --git a/src/objects/Object.h b/src/objects/Object.h
index 79589dc9..c9a1bba8 100644
--- a/src/objects/Object.h
+++ b/src/objects/Object.h
@@ -55,14 +55,7 @@ public:
 	uint8 m_nCollisionDamageEffect;
 	uint8 m_nSpecialCollisionResponseCases;
 	bool m_bCameraToAvoidThisObject;
-
-	// this batch is unused
-	int8 field_17B;
-	int8 field_17C;
-	int8 field_17D;
-	int8 field_17E;
-	int8 field_17F;
-
+	uint32 m_obj_unused1;
 	uint32 m_nEndOfLifeTime;
 	int16 m_nRefModelIndex;
 	CEntity *m_pCurSurface;
diff --git a/src/render/Timecycle.h b/src/render/Timecycle.h
index 28a0b7dd..9af4df49 100644
--- a/src/render/Timecycle.h
+++ b/src/render/Timecycle.h
@@ -122,7 +122,7 @@ public:
 	static float GetSpriteSize(void) { return m_fCurrentSpriteSize; }
 	static int GetShadowStrength(void) { return m_nCurrentShadowStrength; }
 	static int GetLightShadowStrength(void) { return m_nCurrentLightShadowStrength; }
-	static int GetLightOnGroundBrightness(void) { return m_fCurrentLightsOnGroundBrightness; }
+	static float GetLightOnGroundBrightness(void) { return m_fCurrentLightsOnGroundBrightness; }
 	static float GetFarClip(void) { return m_fCurrentFarClip; }
 	static float GetFogStart(void) { return m_fCurrentFogStart; }
 
diff --git a/src/vehicles/Boat.cpp b/src/vehicles/Boat.cpp
index 72fca542..0ed7876a 100644
--- a/src/vehicles/Boat.cpp
+++ b/src/vehicles/Boat.cpp
@@ -79,7 +79,7 @@ CBoat::CBoat(int mi, uint8 owner) : CVehicle(owner)
 
 	bIsInWater = true;
 
-	unk1 = 0.0f;
+	m_phys_unused1 = 0.0f;
 	m_bIsAnchored = true;
 	m_fOrientation = INVALID_ORIENTATION;
 	bTouchingWater = true;