Import Cai1Hsu/re3 @ miami (reVC / GTA:VC decompilation)HEADmiami

Snapshot import (no upstream history) into git.ancap.in.ua/claude, per @lzcnt.
Source: https://github.com/Cai1Hsu/re3 branch miami.

1 files changed, 434 insertions, 0 deletions

diff --git a/src/vehicles/HandlingMgr.cpp b/src/vehicles/HandlingMgr.cpp
new file mode 100644
index 0000000..8438c5c
--- /dev/null
+++ b/src/vehicles/HandlingMgr.cpp
@@ -0,0 +1,434 @@
+#include "common.h"
+
+#include "main.h"
+#include "FileMgr.h"
+#include "Physical.h"
+#include "HandlingMgr.h"
+
+cHandlingDataMgr mod_HandlingManager;
+
+const char *HandlingFilename = "HANDLING.CFG";
+
+const char VehicleNames[NUMHANDLINGS][14] = {
+	"LANDSTAL",
+	"IDAHO",
+	"STINGER",
+	"LINERUN",
+	"PEREN",
+	"SENTINEL",
+	"PATRIOT",
+	"FIRETRUK",
+	"TRASH",
+	"STRETCH",
+	"MANANA",
+	"INFERNUS",
+	"PONY",
+	"MULE",
+	"CHEETAH",
+	"AMBULAN",
+	"FBICAR",
+	"MOONBEAM",
+	"ESPERANT",
+	"TAXI",
+	"KURUMA",
+	"BOBCAT",
+	"MRWHOOP",
+	"BFINJECT",
+	"POLICE",
+	"ENFORCER",
+	"SECURICA",
+	"BANSHEE",
+	"BUS",
+	"RHINO",
+	"BARRACKS",
+	"TRAIN",
+	"HELI",
+	"DODO",
+	"COACH",
+	"CABBIE",
+	"STALLION",
+	"RUMPO",
+	"RCBANDIT",
+	"MAFIA",
+	"AIRTRAIN",
+	"DEADDODO",
+	"FLATBED",
+	"YANKEE",
+	"GOLFCART",
+	"VOODOO",
+	"WASHING",
+	"CUBAN",
+	"ROMERO",
+	"PACKER",
+	"ADMIRAL",
+	"GANGBUR",
+	"ZEBRA",
+	"TOPFUN",
+	"GLENDALE",
+	"OCEANIC",
+	"HERMES",
+	"SABRE1",
+	"SABRETUR",
+	"PHEONIX",
+	"WALTON",
+	"REGINA",
+	"COMET",
+	"DELUXO",
+	"BURRITO",
+	"SPAND",
+	"BAGGAGE",
+	"KAUFMAN",
+	"RANCHER",
+	"FBIRANCH",
+	"VIRGO",
+	"GREENWOO",
+	"HOTRING",
+	"SANDKING",
+	"BLISTAC",
+	"BOXVILLE",
+	"BENSON",
+	"DESPERAD",
+	"LOVEFIST",
+	"BLOODRA",
+	"BLOODRB",
+	"BIKE",
+	"MOPED",
+	"DIRTBIKE",
+	"ANGEL",
+	"FREEWAY",
+	"PREDATOR",
+	"SPEEDER",
+	"REEFER",
+	"RIO",
+	"SQUALO",
+	"TROPIC",
+	"COASTGRD",
+	"DINGHY",
+	"MARQUIS",
+	"CUPBOAT",
+	"SEAPLANE",
+	"SPARROW",
+	"SEASPAR",
+	"MAVERICK",
+	"COASTMAV",
+	"POLMAV",
+	"HUNTER",
+	"RCBARON",
+	"RCGOBLIN",
+	"RCCOPTER"
+};
+
+cHandlingDataMgr::cHandlingDataMgr(void)
+{
+	memset(this, 0, sizeof(*this));
+}
+
+void
+cHandlingDataMgr::Initialise(void)
+{
+	LoadHandlingData();
+	field_0 = 0.1f;
+	fWheelFriction = 0.9f;
+	field_8 = 1.0f;
+	field_C = 0.8f;
+	field_10 = 0.98f;
+}
+
+void
+cHandlingDataMgr::LoadHandlingData(void)
+{
+	char *start, *end;
+	char line[201];	// weird value
+	char delim[4];	// not sure
+	char *word;
+	int field, handlingId;
+	int keepGoing;
+	tHandlingData *handling;
+	tFlyingHandlingData *flyingHandling;
+	tBoatHandlingData *boatHandling;
+	tBikeHandlingData *bikeHandling;
+
+	CFileMgr::SetDir("DATA");
+	CFileMgr::LoadFile(HandlingFilename, work_buff, sizeof(work_buff), "r");
+	CFileMgr::SetDir("");
+
+	start = (char*)work_buff;
+	end = start+1;
+	handling = nil;
+	flyingHandling = nil;
+	boatHandling = nil;
+	bikeHandling = nil;
+	keepGoing = 1;
+
+	while(keepGoing){
+		// find end of line
+		while(*end != '\n') end++;
+
+		// get line
+		strncpy(line, start, end - start);
+		line[end - start] = '\0';
+		start = end+1;
+		end = start+1;
+
+		// yeah, this is kinda crappy
+		if(strcmp(line, ";the end") == 0)
+			keepGoing = 0;
+		else if(line[0] != ';'){
+			if(line[0] == '!'){
+				// Bike data
+				field = 0;
+				strcpy(delim, " \t");
+				// FIX: game seems to use a do-while loop here
+				for(word = strtok(line, delim); word; word = strtok(nil, delim)){
+					switch(field){
+					case  0: break;
+					case  1:
+						handlingId = FindExactWord(word, (const char*)VehicleNames, 14, NUMHANDLINGS);
+						assert(handlingId >= 0 && handlingId < NUMHANDLINGS);
+						bikeHandling = GetBikePointer(handlingId);
+						bikeHandling->nIdentifier = (tVehicleType)handlingId;
+						break;
+					case  2: bikeHandling->fLeanFwdCOM = atof(word); break;
+					case  3: bikeHandling->fLeanFwdForce = atof(word); break;
+					case  4: bikeHandling->fLeanBakCOM = atof(word); break;
+					case  5: bikeHandling->fLeanBackForce = atof(word); break;
+					case  6: bikeHandling->fMaxLean = atof(word); break;
+					case  7: bikeHandling->fFullAnimLean = atof(word); break;
+					case  8: bikeHandling->fDesLean = atof(word); break;
+					case  9: bikeHandling->fSpeedSteer = atof(word); break;
+					case 10: bikeHandling->fSlipSteer = atof(word); break;
+					case 11: bikeHandling->fNoPlayerCOMz = atof(word); break;
+					case 12: bikeHandling->fWheelieAng = atof(word); break;
+					case 13: bikeHandling->fStoppieAng = atof(word); break;
+					case 14: bikeHandling->fWheelieSteer = atof(word); break;
+					case 15: bikeHandling->fWheelieStabMult = atof(word); break;
+					case 16: bikeHandling->fStoppieStabMult = atof(word); break;
+					}
+					field++;
+				}
+				ConvertBikeDataToGameUnits(bikeHandling);
+			}else if(line[0] == '$'){
+				// Flying data
+				field = 0;
+				strcpy(delim, " \t");
+				// FIX: game seems to use a do-while loop here
+				for(word = strtok(line, delim); word; word = strtok(nil, delim)){
+					switch(field){
+					case  0: break;
+					case  1:
+						handlingId = FindExactWord(word, (const char*)VehicleNames, 14, NUMHANDLINGS);
+						assert(handlingId >= 0 && handlingId < NUMHANDLINGS);
+						flyingHandling = GetFlyingPointer(handlingId);
+						flyingHandling->nIdentifier = (tVehicleType)handlingId;
+						break;
+					case  2: flyingHandling->fThrust = atof(word); break;
+					case  3: flyingHandling->fThrustFallOff = atof(word); break;
+					case  4: flyingHandling->fYaw = atof(word); break;
+					case  5: flyingHandling->fYawStab = atof(word); break;
+					case  6: flyingHandling->fSideSlip = atof(word); break;
+					case  7: flyingHandling->fRoll = atof(word); break;
+					case  8: flyingHandling->fRollStab = atof(word); break;
+					case  9: flyingHandling->fPitch = atof(word); break;
+					case 10: flyingHandling->fPitchStab = atof(word); break;
+					case 11: flyingHandling->fFormLift = atof(word); break;
+					case 12: flyingHandling->fAttackLift = atof(word); break;
+					case 13: flyingHandling->fMoveRes = atof(word); break;
+					case 14: flyingHandling->vecTurnRes.x = atof(word); break;
+					case 15: flyingHandling->vecTurnRes.y = atof(word); break;
+					case 16: flyingHandling->vecTurnRes.z = atof(word); break;
+					case 17: flyingHandling->vecSpeedRes.x = atof(word); break;
+					case 18: flyingHandling->vecSpeedRes.y = atof(word); break;
+					case 19: flyingHandling->vecSpeedRes.z = atof(word); break;
+					}
+					field++;
+				}
+			}else if(line[0] == '%'){
+				// Boat data
+				field = 0;
+				strcpy(delim, " \t");
+				// FIX: game seems to use a do-while loop here
+				for(word = strtok(line, delim); word; word = strtok(nil, delim)){
+					switch(field){
+					case  0: break;
+					case  1:
+						handlingId = FindExactWord(word, (const char*)VehicleNames, 14, NUMHANDLINGS);
+						assert(handlingId >= 0 && handlingId < NUMHANDLINGS);
+						boatHandling = GetBoatPointer(handlingId);
+						boatHandling->nIdentifier = (tVehicleType)handlingId;
+						break;
+					case  2: boatHandling->fThrustY = atof(word); break;
+					case  3: boatHandling->fThrustZ = atof(word); break;
+					case  4: boatHandling->fThrustAppZ = atof(word); break;
+					case  5: boatHandling->fAqPlaneForce = atof(word); break;
+					case  6: boatHandling->fAqPlaneLimit = atof(word); break;
+					case  7: boatHandling->fAqPlaneOffset = atof(word); break;
+					case  8: boatHandling->fWaveAudioMult = atof(word); break;
+					case  9: boatHandling->vecMoveRes.x = atof(word); break;
+					case 10: boatHandling->vecMoveRes.y = atof(word); break;
+					case 11: boatHandling->vecMoveRes.z = atof(word); break;
+					case 12: boatHandling->vecTurnRes.x = atof(word); break;
+					case 13: boatHandling->vecTurnRes.y = atof(word); break;
+					case 14: boatHandling->vecTurnRes.z = atof(word); break;
+					case 15: boatHandling->fLook_L_R_BehindCamHeight = atof(word); break;
+					}
+					field++;
+				}
+			}else{
+				field = 0;
+				strcpy(delim, " \t");
+				// FIX: game seems to use a do-while loop here
+				for(word = strtok(line, delim); word; word = strtok(nil, delim)){
+					switch(field){
+					case  0:
+						handlingId = FindExactWord(word, (const char*)VehicleNames, 14, NUMHANDLINGS);
+						assert(handlingId >= 0 && handlingId < NUMHANDLINGS);
+						handling = &HandlingData[handlingId];
+						handling->nIdentifier = (tVehicleType)handlingId;
+						break;
+					case  1: handling->fMass = atof(word); break;
+					case  2: handling->Dimension.x = atof(word); break;
+					case  3: handling->Dimension.y = atof(word); break;
+					case  4: handling->Dimension.z = atof(word); break;
+					case  5: handling->CentreOfMass.x = atof(word); break;
+					case  6: handling->CentreOfMass.y = atof(word); break;
+					case  7: handling->CentreOfMass.z = atof(word); break;
+					case  8: handling->nPercentSubmerged = atoi(word); break;
+					case  9: handling->fTractionMultiplier = atof(word); break;
+					case 10: handling->fTractionLoss = atof(word); break;
+					case 11: handling->fTractionBias = atof(word); break;
+					case 12: handling->Transmission.nNumberOfGears = atoi(word); break;
+					case 13: handling->Transmission.fMaxVelocity = atof(word); break;
+					case 14: handling->Transmission.fEngineAcceleration = atof(word) * 0.4; break;
+					case 15: handling->Transmission.nDriveType = word[0]; break;
+					case 16: handling->Transmission.nEngineType = word[0]; break;
+					case 17: handling->fBrakeDeceleration = atof(word); break;
+					case 18: handling->fBrakeBias = atof(word); break;
+					case 19: handling->bABS = !!atoi(word); break;
+					case 20: handling->fSteeringLock = atof(word); break;
+					case 21: handling->fSuspensionForceLevel = atof(word); break;
+					case 22: handling->fSuspensionDampingLevel = atof(word); break;
+					case 23: handling->fSeatOffsetDistance = atof(word); break;
+					case 24: handling->fCollisionDamageMultiplier = atof(word); break;
+					case 25: handling->nMonetaryValue = atoi(word); break;
+					case 26: handling->fSuspensionUpperLimit = atof(word); break;
+					case 27: handling->fSuspensionLowerLimit = atof(word); break;
+					case 28: handling->fSuspensionBias = atof(word); break;
+					case 29: handling->fSuspensionAntidiveMultiplier = atof(word); break;
+					case 30:
+						sscanf(word, "%x", &handling->Flags);
+						handling->Transmission.Flags = handling->Flags;
+						break;
+					case 31: handling->FrontLights = atoi(word); break;
+					case 32: handling->RearLights = atoi(word); break;
+					}
+					field++;
+				}
+				ConvertDataToGameUnits(handling);
+			}
+		}
+	}
+}
+
+int
+cHandlingDataMgr::FindExactWord(const char *word, const char *words, int wordLen, int numWords)
+{
+	int i;
+
+	for(i = 0; i < numWords; i++){
+		// BUG: the game does something really stupid here, it's fixed here
+		if(strncmp(word, words, wordLen) == 0)
+			return i;
+		words += wordLen;
+	}
+	return numWords;
+}
+
+
+void
+cHandlingDataMgr::ConvertDataToGameUnits(tHandlingData *handling)
+{
+	// convert distance to m, time to 1/50s
+	float velocity, a, b;
+
+	handling->Transmission.fEngineAcceleration *= 1.0f/(50.0f*50.0f);
+	handling->Transmission.fMaxVelocity *= 1000.0f/(60.0f*60.0f * 50.0f);
+	handling->fBrakeDeceleration *= 1.0f/(50.0f*50.0f);
+	handling->fTurnMass = (sq(handling->Dimension.x) + sq(handling->Dimension.y)) * handling->fMass / 12.0f;
+	if(handling->fTurnMass < 10.0f)
+		handling->fTurnMass *= 5.0f;
+	handling->fInvMass = 1.0f/handling->fMass;
+	handling->fCollisionDamageMultiplier *= 2000.0f/handling->fMass;
+	handling->fBuoyancy = 100.0f/handling->nPercentSubmerged * GRAVITY*handling->fMass;
+
+	// Don't quite understand this. What seems to be going on is that
+	// we calculate a drag (air resistance) deceleration for a given velocity and
+	// find the intersection between that and the max engine acceleration.
+	// at that point the car cannot accelerate any further and we've found the max velocity.
+	a = 0.0f;
+	b = 100.0f;
+	velocity = handling->Transmission.fMaxVelocity;
+	while(a < b && velocity > 0.0f){
+		velocity -= 0.01f;
+		// what's the 1/6?
+		a = handling->Transmission.fEngineAcceleration/6.0f;
+		// no density or drag coefficient here...
+		float a_drag = 0.5f*SQR(velocity) * handling->Dimension.x*handling->Dimension.z / handling->fMass;
+		// can't make sense of this... maybe  v - v/(drag + 1)  ? but that doesn't make so much sense either
+		b = -velocity * (1.0f/(a_drag + 1.0f) - 1.0f);
+	}
+
+	if(handling->nIdentifier == HANDLING_RCBANDIT){
+		handling->Transmission.fMaxCruiseVelocity = handling->Transmission.fMaxVelocity;
+		handling->Transmission.fMaxReverseVelocity = -handling->Transmission.fMaxVelocity;
+	}else if(handling->nIdentifier >= HANDLING_BIKE && handling->nIdentifier <= HANDLING_FREEWAY){
+		handling->Transmission.fMaxCruiseVelocity = velocity;
+		handling->Transmission.fMaxVelocity = velocity * 1.2f;
+		handling->Transmission.fMaxReverseVelocity = -0.05f;
+	}else{
+		handling->Transmission.fMaxCruiseVelocity = velocity;
+		handling->Transmission.fMaxVelocity = velocity * 1.2f;
+		handling->Transmission.fMaxReverseVelocity = -0.2f;
+	}
+
+	if(handling->Transmission.nDriveType == '4')
+		handling->Transmission.fEngineAcceleration /= 4.0f;
+	else
+		handling->Transmission.fEngineAcceleration /= 2.0f;
+
+	handling->Transmission.InitGearRatios();
+}
+
+void
+cHandlingDataMgr::ConvertBikeDataToGameUnits(tBikeHandlingData *handling)
+{
+	handling->fMaxLean = Sin(DEGTORAD(handling->fMaxLean));
+	handling->fFullAnimLean = DEGTORAD(handling->fFullAnimLean);
+	handling->fWheelieAng = Sin(DEGTORAD(handling->fWheelieAng));
+	handling->fStoppieAng = Sin(DEGTORAD(handling->fStoppieAng));
+}
+
+int32
+cHandlingDataMgr::GetHandlingId(const char *name)
+{
+	int i;
+	for(i = 0; i < NUMHANDLINGS; i++)
+		if(strncmp(VehicleNames[i], name, 14) == 0)
+			break;
+	return i;
+}
+
+tFlyingHandlingData*
+cHandlingDataMgr::GetFlyingPointer(uint8 id)
+{
+	if(id >= HANDLING_SEAPLANE && id <= HANDLING_RCCOPTER)
+		return &FlyingHandlingData[id-HANDLING_SEAPLANE];
+	return &FlyingHandlingData[0];
+}
+
+tBoatHandlingData*
+cHandlingDataMgr::GetBoatPointer(uint8 id)
+{
+	if(id >= HANDLING_PREDATOR && id <= HANDLING_SEAPLANE)
+		return &BoatHandlingData[id-HANDLING_PREDATOR];
+	return &BoatHandlingData[0];
+}