CCarCtrl::GenerateOneRandomVehicle!

src/control/AutoPilot.h

@@ -1,4 +1,5 @@
 #pragma once
+#include "Timer.h"
 
 class CVehicle;
 
@@ -62,15 +63,15 @@ public:
 	uint32 m_nCurrentRouteNode;
 	uint32 m_nNextRouteNode;
 	uint32 m_nPrevRouteNode;
-	uint32 m_nTotalSpeedScaleFactor;
+	uint32 m_nTimeEnteredCurve;
-	uint32 m_nSpeedScaleFactor;
+	uint32 m_nCurveSpeedScale;
 	uint32 m_nCurrentPathNodeInfo;
 	uint32 m_nNextPathNodeInfo;
 	uint32 m_nPreviousPathNodeInfo;
 	uint32 m_nTimeToStartMission;
 	uint32 m_nTimeSwitchedToRealPhysics;
 	int8 m_nPreviousDirection;
-	int8 m_nCurrentDirecton;
+	int8 m_nCurrentDirection;
 	int8 m_nNextDirection;
 	int8 m_nPreviousLane;
 	int8 m_nCurrentLane;
@@ -94,13 +95,13 @@ public:
 		m_nPrevRouteNode = 0;
 		m_nNextRouteNode = m_nPrevRouteNode;
 		m_nCurrentRouteNode = m_nNextRouteNode;
-		m_nTotalSpeedScaleFactor = 0;
+		m_nTimeEnteredCurve = 0;
-		m_nSpeedScaleFactor = 1000;
+		m_nCurveSpeedScale = 1000;
 		m_nPreviousPathNodeInfo = 0;
 		m_nNextPathNodeInfo = m_nPreviousPathNodeInfo;
 		m_nCurrentPathNodeInfo = m_nNextPathNodeInfo;
 		m_nNextDirection = 1;
-		m_nCurrentDirecton = m_nNextDirection;
+		m_nCurrentDirection = m_nNextDirection;
 		m_nPreviousLane = m_nCurrentLane = 0;
 		m_nDrivingStyle = DRIVINGSTYLE_STOP_FOR_CARS;
 		m_nCarMission = MISSION_NONE;

src/control/CarAI.cpp

@@ -4,3 +4,6 @@
 
 WRAPPER void CCarAI::UpdateCarAI(CVehicle*) { EAXJMP(0x413E50); }
 WRAPPER void CCarAI::MakeWayForCarWithSiren(CVehicle *veh) { EAXJMP(0x416280); }
+WRAPPER eCarMission CCarAI::FindPoliceCarMissionForWantedLevel() { EAXJMP(0x415E30); }
+WRAPPER int32 CCarAI::FindPoliceCarSpeedForWantedLevel(CVehicle*) { EAXJMP(0x415EB0); }
+WRAPPER void CCarAI::AddPoliceOccupants(CVehicle*) { EAXJMP(0x415C60); }

src/control/CarAI.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "AutoPilot.h"
+
 class CVehicle;
 
 class CCarAI
@@ -7,4 +9,7 @@ class CCarAI
 public:
 	static void UpdateCarAI(CVehicle*);
 	static void MakeWayForCarWithSiren(CVehicle *veh);
+	static int32 FindPoliceCarSpeedForWantedLevel(CVehicle*);
+	static eCarMission FindPoliceCarMissionForWantedLevel();
+	static void AddPoliceOccupants(CVehicle*);
 };

src/control/CarCtrl.cpp

@@ -2,6 +2,26 @@
 #include "patcher.h"
 #include "CarCtrl.h"
 
+#include "Automobile.h"
+#include "Camera.h"
+#include "CarAI.h"
+#include "CarGen.h"
+#include "Curves.h"
+#include "CutsceneMgr.h"
+#include "General.h"
+#include "IniFile.h"
+#include "ModelIndices.h"
+#include "PathFind.h"
+#include "Ped.h"
+#include "PlayerInfo.h"
+#include "PlayerPed.h"
+#include "Timer.h"
+#include "VisibilityPlugins.h"
+#include "Vehicle.h"
+#include "Wanted.h"
+#include "World.h"
+#include "Zones.h"
+
 int &CCarCtrl::NumLawEnforcerCars = *(int*)0x8F1B38;
 int &CCarCtrl::NumAmbulancesOnDuty = *(int*)0x885BB0;
 int &CCarCtrl::NumFiretrucksOnDuty = *(int*)0x9411F0;
@@ -10,6 +30,9 @@ float& CCarCtrl::CarDensityMultiplier = *(float*)0x5EC8B4;
 int32 &CCarCtrl::NumMissionCars = *(int32*)0x8F1B54;
 int32 &CCarCtrl::NumRandomCars = *(int32*)0x943118;
 int32 &CCarCtrl::NumParkedCars = *(int32*)0x8F29E0;
+int8 &CCarCtrl::CountDownToCarsAtStart = *(int8*)0x95CD63;
+int32 &CCarCtrl::MaxNumberOfCarsInUse = *(int32*)0x5EC8B8;
+uint32 &CCarCtrl::LastTimeLawEnforcerCreated = *(uint32*)0x8F5FF0;
 
 WRAPPER void CCarCtrl::SwitchVehicleToRealPhysics(CVehicle*) { EAXJMP(0x41F7F0); }
 WRAPPER void CCarCtrl::AddToCarArray(int32 id, int32 vehclass) { EAXJMP(0x4182F0); }
@@ -21,6 +44,471 @@ WRAPPER void CCarCtrl::SteerAICarWithPhysics(CVehicle*) { EAXJMP(0x41DA60); }
 WRAPPER void CCarCtrl::UpdateCarOnRails(CVehicle*) { EAXJMP(0x418880); }
 WRAPPER void CCarCtrl::ScanForPedDanger(CVehicle *veh) { EAXJMP(0x418F40); }
 WRAPPER void CCarCtrl::RemoveFromInterestingVehicleList(CVehicle* v) { EAXJMP(0x41F7A0); }
+WRAPPER void CCarCtrl::GenerateEmergencyServicesCar(void) { EAXJMP(0x41FC50); }
+WRAPPER int32 CCarCtrl::ChooseModel(CZoneInfo*, CVector*, int*) { EAXJMP(0x417EC0); }
+WRAPPER int32 CCarCtrl::ChoosePoliceCarModel(void) { EAXJMP(0x4181F0); }
+
+void
+CCarCtrl::GenerateRandomCars()
+{
+	if (CCutsceneMgr::IsCutsceneProcessing())
+		return;
+	if (NumRandomCars < 30){
+		if (CountDownToCarsAtStart == 0){
+			GenerateOneRandomCar();
+		}
+		else if (--CountDownToCarsAtStart == 0) {
+			for (int i = 0; i < 50; i++)
+				GenerateOneRandomCar();
+			CTheCarGenerators::GenerateEvenIfPlayerIsCloseCounter = 20;
+		}
+	}
+	/* Approximately once per 4 seconds. */
+	if ((CTimer::GetTimeInMilliseconds() & 0xFFFFF000) != (CTimer::GetPreviousTimeInMilliseconds() & 0xFFFFF000))
+		GenerateEmergencyServicesCar();
+}
+
+void
+CCarCtrl::GenerateOneRandomCar()
+{
+	static int32 unk = 0;
+	CPlayerInfo* pPlayer = &CWorld::Players[CWorld::PlayerInFocus];
+	CVector vecTargetPos = FindPlayerCentreOfWorld(CWorld::PlayerInFocus);
+	CVector2D vecPlayerSpeed = FindPlayerSpeed();
+	CZoneInfo zone;
+	CTheZones::GetZoneInfoForTimeOfDay(&vecTargetPos, &zone);
+	pPlayer->m_nTrafficMultiplier = pPlayer->m_fRoadDensity * zone.carDensity;
+	if (NumRandomCars >= pPlayer->m_nTrafficMultiplier * CarDensityMultiplier * CIniFile::CarNumberMultiplier)
+		return;
+	if (NumFiretrucksOnDuty + NumAmbulancesOnDuty + NumParkedCars + NumMissionCars + NumLawEnforcerCars + NumRandomCars >= MaxNumberOfCarsInUse)
+		return;
+	CWanted* pWanted = pPlayer->m_pPed->m_pWanted;
+	int carClass;
+	int carModel;
+	if (pWanted->m_nWantedLevel > 1 && NumLawEnforcerCars < pWanted->m_MaximumLawEnforcerVehicles &&
+		pWanted->m_CurrentCops < pWanted->m_MaxCops && (
+			pWanted->m_nWantedLevel > 3 ||
+			pWanted->m_nWantedLevel > 2 && CTimer::GetTimeInMilliseconds() > LastTimeLawEnforcerCreated + 5000 ||
+			pWanted->m_nWantedLevel > 1 && CTimer::GetTimeInMilliseconds() > LastTimeLawEnforcerCreated + 8000)) {
+		/* Last pWanted->m_nWantedLevel > 1 is unnecessary but I added it for better readability. */
+		/* Wouldn't be surprised it was there originally but was optimized out. */
+		carClass = COPS;
+		carModel = ChoosePoliceCarModel();
+	}else{
+		carModel = ChooseModel(&zone, &vecTargetPos, &carClass);
+		if (carClass == COPS && pWanted->m_nWantedLevel >= 1)
+			/* All cop spawns with wanted level are handled by condition above. */
+			/* In particular it means that cop cars never spawn if player has wanted level of 1. */
+			return;
+	}
+	float frontX, frontY;
+	float preferredDistance, angleLimit;
+	bool invertAngleLimitTest;
+	CVector spawnPosition;
+	int32 curNodeId, nextNodeId;
+	float positionBetweenNodes;
+	bool testForCollision;
+	CVehicle* pPlayerVehicle = FindPlayerVehicle();
+	CVector2D vecPlayerVehicleSpeed;
+	float fPlayerVehicleSpeed;
+	if (pPlayerVehicle) {
+		vecPlayerVehicleSpeed = FindPlayerVehicle()->GetMoveSpeed();
+		fPlayerVehicleSpeed = vecPlayerVehicleSpeed.Magnitude();
+	}
+	if (TheCamera.GetForward().z < -0.9f){
+		/* Player uses topdown camera. */
+		/* Spawn essentially anywhere. */
+		frontX = frontY = 0.707f; /* 45 degrees */
+		angleLimit = -1.0f;
+		invertAngleLimitTest = true;
+		preferredDistance = 40.0f;
+		/* BUG: testForCollision not initialized in original game. */
+		testForCollision = false;
+	}else if (!pPlayerVehicle){
+		/* Player is not in vehicle. */
+		testForCollision = true;
+		frontX = TheCamera.CamFrontXNorm;
+		frontY = TheCamera.CamFrontYNorm;
+		switch (CTimer::GetFrameCounter() & 1) {
+		case 0:
+			/* Spawn a vehicle relatively far away from player. */
+			/* Forward to his current direction (camera direction). */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 1:
+			/* Spawn a vehicle close to player to his side. */
+			/* Kinda not within camera angle. */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = false;
+			preferredDistance = 40.0f;
+			break;
+		}
+	}else if (fPlayerVehicleSpeed > 0.4f){ /* 72 km/h */
+		/* Player is moving fast in vehicle */
+		/* Prefer spawning vehicles very far away from him. */
+		frontX = vecPlayerVehicleSpeed.x / fPlayerVehicleSpeed;
+		frontY = vecPlayerVehicleSpeed.y / fPlayerVehicleSpeed;
+		testForCollision = false;
+		switch (CTimer::GetFrameCounter() & 3) {
+		case 0:
+		case 1:
+			/* Spawn a vehicle in a very narrow gap in front of a player */
+			angleLimit = 0.85f; /* approx 30 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 2:
+			/* Spawn a vehicle relatively far away from player. */
+			/* Forward to his current direction (camera direction). */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 3:
+			/* Spawn a vehicle close to player to his side. */
+			/* Kinda not within camera angle. */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = false;
+			preferredDistance = 40.0f;
+			break;
+		}
+	}else if (fPlayerVehicleSpeed > 0.1f){ /* 18 km/h */
+		/* Player is moving moderately fast in vehicle */
+		/* Spawn more vehicles to player's side. */
+		frontX = vecPlayerVehicleSpeed.x / fPlayerVehicleSpeed;
+		frontY = vecPlayerVehicleSpeed.y / fPlayerVehicleSpeed;
+		testForCollision = false;
+		switch (CTimer::GetFrameCounter() & 3) {
+		case 0:
+			/* Spawn a vehicle in a very narrow gap in front of a player */
+			angleLimit = 0.85f; /* approx 30 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 1:
+			/* Spawn a vehicle relatively far away from player. */
+			/* Forward to his current direction (camera direction). */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 2:
+		case 3:
+			/* Spawn a vehicle close to player to his side. */
+			/* Kinda not within camera angle. */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = false;
+			preferredDistance = 40.0f;
+			break;
+		}
+	}else{
+		/* Player is in vehicle but moving very slow. */
+		/* Then use camera direction instead of vehicle direction. */
+		testForCollision = true;
+		frontX = TheCamera.CamFrontXNorm;
+		frontY = TheCamera.CamFrontYNorm;
+		switch (CTimer::GetFrameCounter() & 1) {
+		case 0:
+			/* Spawn a vehicle relatively far away from player. */
+			/* Forward to his current direction (camera direction). */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = true;
+			preferredDistance = 120.0f * TheCamera.GenerationDistMultiplier;
+			break;
+		case 1:
+			/* Spawn a vehicle close to player to his side. */
+			/* Kinda not within camera angle. */
+			angleLimit = 0.707f; /* 45 degrees */
+			invertAngleLimitTest = false;
+			preferredDistance = 40.0f;
+			break;
+		}
+	}
+	if (!ThePaths.NewGenerateCarCreationCoors(vecTargetPos.x, vecTargetPos.y, frontX, frontY,
+		preferredDistance, angleLimit, invertAngleLimitTest, &spawnPosition, &curNodeId, &nextNodeId,
+		&positionBetweenNodes, carClass == COPS && pWanted->m_nWantedLevel >= 1))
+		return;
+	int16 colliding;
+	CWorld::FindObjectsKindaColliding(spawnPosition, 10.0f, true, &colliding, 2, nil, false, true, true, false, false);
+	if (colliding)
+		/* If something is already present in spawn position, do not create vehicle*/
+		return;
+	if (!ThePaths.TestCoorsCloseness(vecTargetPos, false, spawnPosition))
+		/* Testing if spawn position can reach target position via valid path. */
+		return;
+	int16 idInNode = 0;
+	CPathNode* pNode1 = &ThePaths.m_pathNodes[curNodeId];
+	while (idInNode < pNode1->numLinks &&
+		ThePaths.m_connections[idInNode + pNode1->firstLink] != nextNodeId)
+		idInNode++;
+	int16 connectionId = ThePaths.m_carPathConnections[idInNode + ThePaths.m_pathNodes[curNodeId].firstLink];
+	CCarPathLink* pPathLink = &ThePaths.m_carPathLinks[connectionId];
+	int16 lanesOnCurrentRoad = pPathLink->pathNodeIndex == nextNodeId ? pPathLink->numLeftLanes : pPathLink->numRightLanes;
+	CVehicleModelInfo* pModelInfo = (CVehicleModelInfo*)CModelInfo::GetModelInfo(carModel);
+	if (lanesOnCurrentRoad == 0 || pModelInfo->m_vehicleType == VEHICLE_TYPE_BIKE)
+		/* Not spawning vehicle if road is one way and intended direction is opposide to that way. */
+		/* Also not spawning bikes but they don't exist in final game. */
+		return;
+	CAutomobile* pCar = new CAutomobile(carModel, RANDOM_VEHICLE);
+	pCar->AutoPilot.m_nPrevRouteNode = 0;
+	pCar->AutoPilot.m_nCurrentRouteNode = curNodeId;
+	pCar->AutoPilot.m_nNextRouteNode = nextNodeId;
+	switch (carClass) {
+	case POOR:
+	case RICH:
+	case EXEC:
+	case WORKER:
+	case SPECIAL:
+	case BIG:
+	case TAXI:
+	case MAFIA:
+	case TRIAD:
+	case DIABLO:
+	case YAKUZA:
+	case YARDIE:
+	case COLOMB:
+	case NINES:
+	case GANG8:
+	case GANG9:
+	{
+		pCar->AutoPilot.m_nCruiseSpeed = CGeneral::GetRandomNumberInRange(9, 14);
+		if (carClass == EXEC)
+			pCar->AutoPilot.m_nCruiseSpeed = CGeneral::GetRandomNumberInRange(12, 18);
+		else if (carClass == POOR || carClass == SPECIAL)
+			pCar->AutoPilot.m_nCruiseSpeed = CGeneral::GetRandomNumberInRange(7, 10);
+		CVehicleModelInfo* pVehicleInfo = (CVehicleModelInfo*)CModelInfo::GetModelInfo(pCar->GetModelIndex());
+		if (pVehicleInfo->GetColModel()->boundingBox.max.y - pVehicleInfo->GetColModel()->boundingBox.min.y > 10.0f || carClass == BIG) {
+			pCar->AutoPilot.m_nCruiseSpeed *= 3;
+			pCar->AutoPilot.m_nCruiseSpeed /= 4;
+		}
+		pCar->AutoPilot.m_fMaxTrafficSpeed = pCar->AutoPilot.m_nCruiseSpeed;
+		pCar->AutoPilot.m_nCarMission = MISSION_CRUISE;
+		pCar->AutoPilot.m_nAnimationId = TEMPACT_NONE;
+		pCar->AutoPilot.m_nDrivingStyle = DRIVINGSTYLE_STOP_FOR_CARS;
+		break;
+	}
+	case COPS:
+		pCar->AutoPilot.m_nAnimationId = TEMPACT_NONE;
+		if (CWorld::Players[CWorld::PlayerInFocus].m_pPed->m_pWanted->m_nWantedLevel != 0){
+			pCar->AutoPilot.m_nCruiseSpeed = CCarAI::FindPoliceCarSpeedForWantedLevel(pCar);
+			pCar->AutoPilot.m_fMaxTrafficSpeed = pCar->AutoPilot.m_nCruiseSpeed / 2;
+			pCar->AutoPilot.m_nCarMission = CCarAI::FindPoliceCarMissionForWantedLevel();
+			pCar->AutoPilot.m_nDrivingStyle = DRIVINGSTYLE_AVOID_CARS;
+		}else{
+			pCar->AutoPilot.m_nCruiseSpeed = CGeneral::GetRandomNumberInRange(12, 16);
+			pCar->AutoPilot.m_fMaxTrafficSpeed = pCar->AutoPilot.m_nCruiseSpeed;
+			pCar->AutoPilot.m_nDrivingStyle = DRIVINGSTYLE_STOP_FOR_CARS;
+			pCar->AutoPilot.m_nCarMission = MISSION_CRUISE;
+		}
+		if (carModel == MI_FBICAR){
+			pCar->m_currentColour1 = 0;
+			pCar->m_currentColour2 = 0;
+			/* FBI cars are gray in carcols, but we want them black if they going after player. */
+		}
+	default:
+		break;
+	}
+	if (pCar && pCar->GetModelIndex() == MI_MRWHOOP)
+		pCar->m_bSirenOrAlarm = true;
+	pCar->AutoPilot.m_nNextPathNodeInfo = connectionId;
+	pCar->AutoPilot.m_nCurrentLane = pCar->AutoPilot.m_nPreviousLane = CGeneral::GetRandomNumber() % lanesOnCurrentRoad;
+	CColBox* boundingBox = &CModelInfo::GetModelInfo(pCar->GetModelIndex())->GetColModel()->boundingBox;
+	float carLength = 1.0f + (boundingBox->max.y - boundingBox->min.y) / 2;
+	float distanceBetweenNodes = (ThePaths.m_pathNodes[curNodeId].pos - ThePaths.m_pathNodes[nextNodeId].pos).Magnitude2D();
+	/* If car is so long that it doesn't fit between two car nodes, place it directly in the middle. */
+	/* Otherwise put it at least in a way that full vehicle length fits between two nodes. */
+	if (distanceBetweenNodes / 2 < carLength)
+		positionBetweenNodes = 0.5f;
+	else
+		positionBetweenNodes = min(1.0f - carLength / distanceBetweenNodes, max(carLength / distanceBetweenNodes, positionBetweenNodes));
+	pCar->AutoPilot.m_nNextDirection = (curNodeId >= nextNodeId) ? 1 : -1;
+	if (ThePaths.m_pathNodes[curNodeId].numLinks == 1){
+		/* Do not create vehicle if there is nowhere to go. */
+		delete pCar;
+		return;
+	}
+	int16 nextConnection = pCar->AutoPilot.m_nNextPathNodeInfo;
+	int16 newLink;
+	while (nextConnection == pCar->AutoPilot.m_nNextPathNodeInfo){
+		newLink = CGeneral::GetRandomNumber() % ThePaths.m_pathNodes[curNodeId].numLinks;
+		nextConnection = ThePaths.m_carPathConnections[newLink + ThePaths.m_pathNodes[curNodeId].firstLink];
+	}
+	pCar->AutoPilot.m_nCurrentPathNodeInfo = nextConnection;
+	pCar->AutoPilot.m_nCurrentDirection = (ThePaths.m_connections[newLink + ThePaths.m_pathNodes[curNodeId].firstLink] >= curNodeId) ? 1 : -1;
+	CVector2D vecBetweenNodes = ThePaths.m_pathNodes[nextNodeId].pos - ThePaths.m_pathNodes[curNodeId].pos;
+	float forwardX, forwardY;
+	float distBetweenNodes = vecBetweenNodes.Magnitude();
+	if (distanceBetweenNodes == 0.0f){
+		forwardX = 1.0f;
+		forwardY = 0.0f;
+	}else{
+		forwardX = vecBetweenNodes.x / distBetweenNodes;
+		forwardY = vecBetweenNodes.y / distBetweenNodes;
+	}
+	/* I think the following might be some form of SetRotateZOnly. */
+	/* Setting up direction between two car nodes. */
+	pCar->GetForward() = CVector(forwardX, forwardY, 0.0f);
+	pCar->GetRight() = CVector(forwardY, -forwardX, 0.0f);
+	pCar->GetUp() = CVector(0.0f, 0.0f, 1.0f);
+
+	float currentPathLinkForwardX = pCar->AutoPilot.m_nCurrentDirection * ThePaths.m_carPathLinks[pCar->AutoPilot.m_nCurrentPathNodeInfo].dirX;
+	float currentPathLinkForwardY = pCar->AutoPilot.m_nCurrentDirection * ThePaths.m_carPathLinks[pCar->AutoPilot.m_nCurrentPathNodeInfo].dirY;
+	float nextPathLinkForwardX = pCar->AutoPilot.m_nNextDirection * ThePaths.m_carPathLinks[pCar->AutoPilot.m_nNextPathNodeInfo].dirX;
+	float nextPathLinkForwardY = pCar->AutoPilot.m_nNextDirection * ThePaths.m_carPathLinks[pCar->AutoPilot.m_nNextPathNodeInfo].dirY;
+
+	/* Selecting lane. */
+	CCarPathLink* pCurrentLink = &ThePaths.m_carPathLinks[pCar->AutoPilot.m_nCurrentPathNodeInfo];
+	float currentLaneCoefficient = (pCurrentLink->numLeftLanes == 0) ? (0.5f - 0.5f * pCurrentLink->numRightLanes) :
+		((pCurrentLink->numRightLanes == 0) ? (0.5f - 0.5f * pCurrentLink->numLeftLanes) : 0.5f);
+	/* 5.0f is most likely lane width. TODO: enum */
+	float roadShiftAlongCurrentNode = (pCar->AutoPilot.m_nPreviousLane + currentLaneCoefficient) * 5.0f;
+	CCarPathLink* pNextLink = &ThePaths.m_carPathLinks[pCar->AutoPilot.m_nNextPathNodeInfo];
+	float nextLaneCoefficient = (pNextLink->numLeftLanes == 0) ? (0.5f - 0.5f * pNextLink->numRightLanes) :
+		((pNextLink->numRightLanes == 0) ? (0.5f - 0.5f * pNextLink->numLeftLanes) : 0.5f);
+	float roadShiftAlongNextNode = (pCar->AutoPilot.m_nCurrentLane + nextLaneCoefficient) * 5.0f;
+	CVector positionOnCurrentLinkIncludingLane(
+		pCurrentLink->posX + roadShiftAlongCurrentNode * currentPathLinkForwardY,
+		pCurrentLink->posY - roadShiftAlongCurrentNode * currentPathLinkForwardX,
+		0.0f);
+	CVector positionOnNextLinkIncludingLane(
+		pNextLink->posX + roadShiftAlongNextNode * nextPathLinkForwardY,
+		pNextLink->posY - roadShiftAlongNextNode * nextPathLinkForwardX,
+		0.0f);
+	float directionCurrentLinkX = pCurrentLink->dirX * pCar->AutoPilot.m_nCurrentDirection;
+	float directionCurrentLinkY = pCurrentLink->dirY * pCar->AutoPilot.m_nCurrentDirection;
+	float directionNextLinkX = pNextLink->dirX * pCar->AutoPilot.m_nNextDirection;
+	float directionNextLinkY = pNextLink->dirY * pCar->AutoPilot.m_nNextDirection;
+	/* We want to make a path between two links that may not have the same forward directions a curve. */
+	pCar->AutoPilot.m_nCurveSpeedScale = CCurves::CalcSpeedScaleFactor(
+		&positionOnCurrentLinkIncludingLane,
+		&positionOnNextLinkIncludingLane,
+		directionCurrentLinkX, directionCurrentLinkY,
+		directionNextLinkX, directionNextLinkY
+	) * (1000.0f / pCar->AutoPilot.m_fMaxTrafficSpeed);
+#ifdef FIX_BUGS
+	/* Casting timer to float is very unwanted. In this case it's not awful */
+	/* but in CAutoPilot::ModifySpeed it can even cause crashes (see SilentPatch). */
+	pCar->AutoPilot.m_nTimeEnteredCurve = CTimer::GetTimeInMilliseconds() -
+		(uint32)((0.5f + positionBetweenNodes) * pCar->AutoPilot.m_nCurveSpeedScale);
+#else
+	pCar->AutoPilot.m_nTotalSpeedScaleFactor = CTimer::GetTimeInMilliseconds() -
+		(0.5f + positionBetweenNodes) * pCar->AutoPilot.m_nSpeedScaleFactor;
+#endif
+	uint32 timeAlreadyInCurve = CTimer::GetTimeInMilliseconds() - pCar->AutoPilot.m_nTimeEnteredCurve;
+	float positionAlongCurve = (float)timeAlreadyInCurve / pCar->AutoPilot.m_nCurveSpeedScale;
+	CVector directionCurrentLink(directionCurrentLinkX, directionCurrentLinkY, 0.0f);
+	CVector directionNextLink(directionNextLinkX, directionNextLinkY, 0.0f);
+	CVector positionIncludingCurve;
+	CVector directionIncludingCurve;
+	CCurves::CalcCurvePoint(
+		&positionOnCurrentLinkIncludingLane,
+		&positionOnNextLinkIncludingLane,
+		&directionCurrentLink,
+		&directionNextLink,
+		positionAlongCurve,
+		pCar->AutoPilot.m_nCurveSpeedScale,
+		&positionIncludingCurve,
+		&directionIncludingCurve
+	);
+	CVector vectorBetweenNodes = ThePaths.m_pathNodes[curNodeId].pos - ThePaths.m_pathNodes[nextNodeId].pos;
+	CVector finalPosition = positionIncludingCurve + vectorBetweenNodes * 2.0f / vectorBetweenNodes.Magnitude();
+	finalPosition.z = positionBetweenNodes * ThePaths.m_pathNodes[nextNodeId].pos.z +
+		(1.0f - positionBetweenNodes) * ThePaths.m_pathNodes[curNodeId].pos.z;
+	float groundZ = 1000000000.0f; // TODO: define/enum
+	CColPoint colPoint;
+	CEntity* pEntity;
+	if (CWorld::ProcessVerticalLine(finalPosition, 1000.0f, colPoint, pEntity, true, false, false, false, true, false, nil))
+		groundZ = colPoint.point.z;
+	if (CWorld::ProcessVerticalLine(finalPosition, -1000.0f, colPoint, pEntity, true, false, false, false, true, false, nil)){
+		if (ABS(colPoint.point.z - finalPosition.z) < ABS(groundZ - finalPosition.z))
+			groundZ = colPoint.point.z;
+	}
+	if (groundZ == 1000000000.0f || ABS(groundZ - finalPosition.z) > 7.0f) {
+		/* Failed to find ground or too far from expected position. */
+		delete pCar;
+		return;
+	}
+	finalPosition.z = groundZ + pCar->GetHeightAboveRoad();
+	pCar->GetPosition() = finalPosition;
+	pCar->SetMoveSpeed(directionIncludingCurve / 60.0f);
+	CVector2D speedDifferenceWithTarget = (CVector2D)pCar->GetMoveSpeed() - vecPlayerSpeed;
+	CVector2D distanceToTarget = positionIncludingCurve - vecTargetPos;
+	switch (carClass) {
+	case POOR:
+	case RICH:
+	case EXEC:
+	case WORKER:
+	case SPECIAL:
+	case BIG:
+	case TAXI:
+	case MAFIA:
+	case TRIAD:
+	case DIABLO:
+	case YAKUZA:
+	case YARDIE:
+	case COLOMB:
+	case NINES:
+	case GANG8:
+	case GANG9:
+		pCar->m_status = STATUS_SIMPLE;
+		break;
+	case COPS:
+		pCar->m_status = (pCar->AutoPilot.m_nCarMission == MISSION_CRUISE) ? STATUS_SIMPLE : STATUS_PHYSICS;
+		pCar->ChangeLawEnforcerState(1);
+		break;
+	default:
+		break;
+	}
+	CVisibilityPlugins::SetClumpAlpha(pCar->GetClump(), 0);
+	if (!pCar->GetIsOnScreen()){
+		if ((vecTargetPos - pCar->GetPosition()).Magnitude2D() > 50.0f) {
+			/* Too far away cars that are not visible aren't needed. */
+			delete pCar;
+			return;
+		}
+	}else if((vecTargetPos - pCar->GetPosition()).Magnitude2D() > TheCamera.GenerationDistMultiplier * 130.0f ||
+		(vecTargetPos - pCar->GetPosition()).Magnitude2D() < TheCamera.GenerationDistMultiplier * 110.0f){
+		delete pCar;
+		return;
+	}else if((TheCamera.GetPosition() - pCar->GetPosition()).Magnitude2D() < 90.0f * TheCamera.GenerationDistMultiplier){
+		delete pCar;
+		return;
+	}
+	CVehicleModelInfo* pVehicleModel = (CVehicleModelInfo*)CModelInfo::GetModelInfo(pCar->GetModelIndex());
+	float radiusToTest = pVehicleModel->GetColModel()->boundingSphere.radius;
+	if (testForCollision){
+		CWorld::FindObjectsKindaColliding(pCar->GetPosition(), radiusToTest + 20.0f, true, &colliding, 2, nil, false, true, false, false, false);
+		if (colliding){
+			delete pCar;
+			return;
+		}
+	}
+	CWorld::FindObjectsKindaColliding(pCar->GetPosition(), radiusToTest, true, &colliding, 2, nil, false, true, false, false, false);
+	if (colliding){
+		delete pCar;
+		return;
+	}
+	if (speedDifferenceWithTarget.x * distanceToTarget.x +
+		speedDifferenceWithTarget.y * distanceToTarget.y >= 0.0f){
+		delete pCar;
+		return;
+	}
+	pVehicleModel->AvoidSameVehicleColour(&pCar->m_currentColour1, &pCar->m_currentColour2);
+	CWorld::Add(pCar);
+	if (carClass == COPS)
+		CCarAI::AddPoliceOccupants(pCar);
+	else
+		pCar->SetUpDriver();
+	if ((CGeneral::GetRandomNumber() & 0x3F) == 0){ /* 1/64 probability */
+		pCar->m_status = STATUS_PHYSICS;
+		pCar->AutoPilot.m_nDrivingStyle = DRIVINGSTYLE_AVOID_CARS;
+		pCar->AutoPilot.m_nCruiseSpeed += 10;
+	}
+	if (carClass == COPS)
+		LastTimeLawEnforcerCreated = CTimer::GetTimeInMilliseconds();
+}
 
 bool
 CCarCtrl::MapCouldMoveInThisArea(float x, float y)
@@ -29,3 +517,7 @@ CCarCtrl::MapCouldMoveInThisArea(float x, float y)
 	return x > -342.0f && x < -219.0f &&
 		y > -677.0f && y < -580.0f;
 }
+
+STARTPATCHES
+InjectHook(0x416580, &CCarCtrl::GenerateRandomCars, PATCH_JUMP);
+ENDPATCHES

src/control/CarCtrl.h

@@ -1,9 +1,30 @@
 #pragma once
 
 class CVehicle;
+class CZoneInfo;
 
 class CCarCtrl
 {
+	enum eCarClass {
+		POOR = 0,
+		RICH,
+		EXEC,
+		WORKER,
+		SPECIAL,
+		BIG,
+		TAXI,
+		CLASS7,
+		MAFIA,
+		TRIAD,
+		DIABLO,
+		YAKUZA,
+		YARDIE,
+		COLOMB,
+		NINES,
+		GANG8,
+		GANG9,
+		COPS
+	};
 public:
 	static void SwitchVehicleToRealPhysics(CVehicle*);
 	static void AddToCarArray(int32 id, int32 vehclass);
@@ -16,6 +37,11 @@ public:
 	static bool MapCouldMoveInThisArea(float x, float y);
 	static void ScanForPedDanger(CVehicle *veh);
 	static void RemoveFromInterestingVehicleList(CVehicle*);
+	static void GenerateRandomCars(void);
+	static void GenerateOneRandomCar(void);
+	static void GenerateEmergencyServicesCar(void);
+	static int32 ChooseModel(CZoneInfo*, CVector*, int*);
+	static int32 ChoosePoliceCarModel(void);
 
 	static int32 &NumLawEnforcerCars;
 	static int32 &NumAmbulancesOnDuty;
@@ -25,4 +51,7 @@ public:
 	static int32 &NumParkedCars;
 	static bool &bCarsGeneratedAroundCamera;
 	static float &CarDensityMultiplier;
+	static int8 &CountDownToCarsAtStart;
+	static int32 &MaxNumberOfCarsInUse;
+	static uint32 &LastTimeLawEnforcerCreated;
 };

src/control/Curves.cpp

@@ -0,0 +1,6 @@
+#include "common.h"
+#include "patcher.h"
+#include "Curves.h"
+
+WRAPPER float CCurves::CalcSpeedScaleFactor(CVector*, CVector*, float, float, float, float) { EAXJMP(0x420410); }
+WRAPPER void CCurves::CalcCurvePoint(CVector*, CVector*, CVector*, CVector*, float, int32, CVector*, CVector*) { EAXJMP(0x4204D0); }

src/control/Curves.h

@@ -0,0 +1,9 @@
+#pragma once
+class CVector;
+
+class CCurves
+{
+public:
+	static float CalcSpeedScaleFactor(CVector*, CVector*, float, float, float, float);
+	static void CalcCurvePoint(CVector*, CVector*, CVector*, CVector*, float, int32, CVector*, CVector*);
+};

src/control/PathFind.cpp

@@ -6,6 +6,8 @@ CPathFind &ThePaths = *(CPathFind*)0x8F6754;
 
 WRAPPER int32 CPathFind::FindNodeClosestToCoors(CVector coors, uint8 type, float distLimit, bool disabled, bool betweenLevels) { EAXJMP(0x42CC30); }
 WRAPPER CPathNode** CPathFind::FindNextNodeWandering(uint8, CVector, CPathNode**, CPathNode**, uint8, uint8*) { EAXJMP(0x42B9F0); }
+WRAPPER bool CPathFind::NewGenerateCarCreationCoors(float, float, float, float, float, float, bool, CVector*, int32*, int32*, float*, bool) { EAXJMP(0x42BF10); }
+WRAPPER bool CPathFind::TestCoorsCloseness(CVector, bool, CVector) { EAXJMP(0x42C8C0); }
 int TempListLength;
 
 enum

src/control/PathFind.h

@@ -130,6 +130,8 @@ public:
 	void RegisterMapObject(CTreadable *mapObject);
 	int32 FindNodeClosestToCoors(CVector coors, uint8 type, float distLimit, bool disabled, bool betweenLevels);
 	CPathNode** FindNextNodeWandering(uint8, CVector, CPathNode**, CPathNode**, uint8, uint8*);
+	bool NewGenerateCarCreationCoors(float spawnX, float spawnY, float frontX, float frontY, float preferredDistance, float angleLimit /* angle limit between camera direction and vector to spawn */, bool invertAngleLimitTest, CVector* pSpawnPosition, int32* pNode1, int32* pNode2, float* pPositionBetweenNodes, bool ignoreSwitchedOff);
+	bool TestCoorsCloseness(CVector pos1, bool, CVector pos2);
 
 	bool IsPathObject(int id) { return id < PATHNODESIZE && (InfoForTileCars[id*12].type != 0 || InfoForTilePeds[id*12].type != 0); }
 

src/control/Population.cpp

@@ -8,6 +8,7 @@ bool &CPopulation::ms_bGivePedsWeapons = *(bool*)0x95CCF6;
 int32 &CPopulation::m_AllRandomPedsThisType = *(int32*)0x5FA570;
 float &CPopulation::PedDensityMultiplier = *(float*)0x5FA56C;
 uint32 &CPopulation::ms_nTotalMissionPeds = *(uint32*)0x8F5F70;
+int32 &CPopulation::MaxNumberOfPedsInUse = *(int32*)0x5FA574;
 
 WRAPPER void CPopulation::UpdatePedCount(uint32, bool) { EAXJMP(0x4F5A60); }
 WRAPPER void CPopulation::DealWithZoneChange(eLevelName oldLevel, eLevelName newLevel, bool) { EAXJMP(0x4F6200); }

src/control/Population.h

@@ -17,6 +17,7 @@ public:
 	static int32 &m_AllRandomPedsThisType;
 	static float &PedDensityMultiplier;
 	static uint32 &ms_nTotalMissionPeds;
+	static int32 &MaxNumberOfPedsInUse;
 
 	static void UpdatePedCount(uint32, bool);
 	static void DealWithZoneChange(eLevelName oldLevel, eLevelName newLevel, bool);

src/control/Restart.h

@@ -1,5 +1,4 @@
 #pragma once
-#pragma once
 
 class CRestart
 {

src/core/IniFile.cpp

@@ -0,0 +1,28 @@
+#include "common.h"
+#include "patcher.h"
+#include "IniFile.h"
+
+#include "CarCtrl.h"
+#include "FileMgr.h"
+#include "main.h"
+#include "Population.h"
+
+float &CIniFile::PedNumberMultiplier = *(float*)0x6182F4;
+float &CIniFile::CarNumberMultiplier = *(float*)0x6182F8;
+
+void CIniFile::LoadIniFile()
+{
+	CFileMgr::SetDir("");
+	int f = CFileMgr::OpenFile("gta3.ini", "r");
+	if (f){
+		CFileMgr::ReadLine(f, gString, 200);
+		sscanf(gString, "%f", &PedNumberMultiplier);
+		PedNumberMultiplier = min(3.0f, max(0.5f, PedNumberMultiplier));
+		CFileMgr::ReadLine(f, gString, 200);
+		sscanf(gString, "%f", &CarNumberMultiplier);
+		CarNumberMultiplier = min(3.0f, max(0.5f, CarNumberMultiplier));
+		CFileMgr::CloseFile(f);
+	}
+	CPopulation::MaxNumberOfPedsInUse = 25.0f * PedNumberMultiplier;
+	CCarCtrl::MaxNumberOfCarsInUse = 12.0f * CarNumberMultiplier;
+}

src/core/IniFile.h

@@ -0,0 +1,10 @@
+#pragma once
+
+class CIniFile
+{
+public:
+	static void LoadIniFile();
+
+	static float& PedNumberMultiplier;
+	static float& CarNumberMultiplier;
+};

src/core/common.h

@@ -179,7 +179,7 @@ void re3_assert(const char *expr, const char *filename, unsigned int lineno, con
 
 #define max(a, b)  (((a) > (b)) ? (a) : (b)) 
 #define min(a, b)  (((a) < (b)) ? (a) : (b))
-#define ABS(a)  (((a) < 0) ? (-a) : (a))
+#define ABS(a)  (((a) < 0) ? (-(a)) : (a))
 #define norm(value, min, max) (((value) < (min)) ? 0 : (((value) > (max)) ? 1 : (((value) - (min)) / ((max) - (min)))))
 
 

src/entities/Physical.h

@@ -115,6 +115,9 @@ public:
 		m_vecMoveSpeed.y = y;
 		m_vecMoveSpeed.z = z;
 	}
+	void SetMoveSpeed(const CVector& speed) {
+		m_vecMoveSpeed = speed;
+	}
 	const CVector &GetTurnSpeed() { return m_vecTurnSpeed; }
 	void SetTurnSpeed(float x, float y, float z) {
 		m_vecTurnSpeed.x = x;