diff options
Diffstat (limited to 'src/vehicles/HandlingMgr.cpp')
| -rw-r--r-- | src/vehicles/HandlingMgr.cpp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/src/vehicles/HandlingMgr.cpp b/src/vehicles/HandlingMgr.cpp new file mode 100644 index 00000000..47d0564c --- /dev/null +++ b/src/vehicles/HandlingMgr.cpp @@ -0,0 +1,247 @@ +#include "common.h" +#include "patcher.h" +#include "main.h" +#include "FileMgr.h" +#include "HandlingMgr.h" + +cHandlingDataMgr &mod_HandlingManager = *(cHandlingDataMgr*)0x728060; + +char *HandlingFilename = "HANDLING.CFG"; + +char VehicleNames[NUMHANDLINGS][14] = { + "LANDSTAL", + "IDAHO", + "STINGER", + "LINERUN", + "PEREN", + "SENTINEL", + "PATRIOT", + "FIRETRUK", + "TRASH", + "STRETCH", + "MANANA", + "INFERNUS", + "BLISTA", + "PONY", + "MULE", + "CHEETAH", + "AMBULAN", + "FBICAR", + "MOONBEAM", + "ESPERANT", + "TAXI", + "KURUMA", + "BOBCAT", + "MRWHOOP", + "BFINJECT", + "POLICE", + "ENFORCER", + "SECURICA", + "BANSHEE", + "PREDATOR", + "BUS", + "RHINO", + "BARRACKS", + "TRAIN", + "HELI", + "DODO", + "COACH", + "CABBIE", + "STALLION", + "RUMPO", + "RCBANDIT", + "BELLYUP", + "MRWONGS", + "MAFIA", + "YARDIE", + "YAKUZA", + "DIABLOS", + "COLUMB", + "HOODS", + "AIRTRAIN", + "DEADDODO", + "SPEEDER", + "REEFER", + "PANLANT", + "FLATBED", + "YANKEE", + "BORGNINE" +}; + +cHandlingDataMgr::cHandlingDataMgr(void) +{ + memset(this, 0, sizeof(this)); +} + +void +cHandlingDataMgr::Initialise(void) +{ + LoadHandlingData(); + field_0 = 0.1f; + field_4 = 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; + + CFileMgr::SetDir("DATA"); + CFileMgr::LoadFile(HandlingFilename, work_buff, sizeof(work_buff), "r"); + CFileMgr::SetDir(""); + + start = (char*)work_buff; + end = start+1; + handling = 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(strncmp(line, ";the end", 9) == 0) + keepGoing = 0; + else if(line[0] != ';'){ + 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 = handlingId; + break; + case 1: handling->fMass = strtod(word, nil); break; + case 2: handling->Dimension.x = strtod(word, nil); break; + case 3: handling->Dimension.y = strtod(word, nil); break; + case 4: handling->Dimension.z = strtod(word, nil); break; + case 5: handling->CentreOfMass.x = strtod(word, nil); break; + case 6: handling->CentreOfMass.y = strtod(word, nil); break; + case 7: handling->CentreOfMass.z = strtod(word, nil); break; + case 8: handling->nPercentSubmerged = atoi(word); break; + case 9: handling->fTractionMultiplier = strtod(word, nil); break; + case 10: handling->fTractionLoss = strtod(word, nil); break; + case 11: handling->fTractionBias = strtod(word, nil); break; + case 12: handling->TransmissionData.nNumberOfGears = atoi(word); break; + case 13: handling->TransmissionData.fMaxVelocity = strtod(word, nil); break; + case 14: handling->TransmissionData.fEngineAcceleration = strtod(word, nil) * 0.4f; break; + case 15: handling->TransmissionData.nDriveType = word[0]; break; + case 16: handling->TransmissionData.nEngineType = word[0]; break; + case 17: handling->fBrakeDeceleration = strtod(word, nil); break; + case 18: handling->fBrakeBias = strtod(word, nil); break; + case 19: handling->bABS = !!atoi(word); break; + case 20: handling->fSteeringLock = strtod(word, nil); break; + case 21: handling->fSuspensionForceLevel = strtod(word, nil); break; + case 22: handling->fSuspensionDampingLevel = strtod(word, nil); break; + case 23: handling->fSeatOffsetDistance = strtod(word, nil); break; + case 24: handling->fCollisionDamageMultiplier = strtod(word, nil); break; + case 25: handling->nMonetaryValue = atoi(word); break; + case 26: handling->fSuspensionUpperLimit = strtod(word, nil); break; + case 27: handling->fSuspensionLowerLimit = strtod(word, nil); break; + case 28: handling->fSuspensionBias = strtod(word, nil); break; + case 29: + sscanf(word, "%x", &handling->Flags); + handling->TransmissionData.Flags = handling->Flags; + break; + case 30: handling->FrontLights = atoi(word); break; + case 31: 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) +{ + // TODO: figure out what exactly is being converted here + float velocity, a, b, specificVolume; + + handling->TransmissionData.fEngineAcceleration /= 2500.0f; + handling->TransmissionData.fMaxVelocity /= 180.0f; + handling->fBrakeDeceleration /= 2500.0f; + 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->fBuoyancy = 100.0f/handling->nPercentSubmerged * 0.008*handling->fMass; + + // What the hell is going on here? + specificVolume = handling->Dimension.x*handling->Dimension.z*0.5f / handling->fMass; // ? + a = 0.0f; + b = 100.0f; + velocity = handling->TransmissionData.fMaxVelocity; + while(a < b && velocity > 0.0f){ + velocity -= 0.01; + a = handling->TransmissionData.fEngineAcceleration/6.0f; + b = -velocity * (1.0f/(specificVolume * sq(velocity) + 1.0f) - 1.0f); + } + + if(handling->nIdentifier == HANDLING_RCBANDIT){ + handling->TransmissionData.fUnkMaxVelocity = handling->TransmissionData.fMaxVelocity; + }else{ + handling->TransmissionData.fUnkMaxVelocity = velocity; + handling->TransmissionData.fMaxVelocity = velocity * 1.2f; + } + handling->TransmissionData.fMaxReverseVelocity = -0.2f; + + if(handling->TransmissionData.nDriveType == '4') + handling->TransmissionData.fEngineAcceleration /= 4.0f; + else + handling->TransmissionData.fEngineAcceleration /= 2.0f; + + handling->TransmissionData.InitGearRatios(); +} + +int32 +cHandlingDataMgr::GetHandlingId(const char *name) +{ + int i; + for(i = 0; i < NUMHANDLINGS; i++) + if(strncmp(VehicleNames[i], name, 14) == 0) + break; + return i; +} + +STARTPATCHES + InjectHook(0x546D80, &cHandlingDataMgr::Initialise, PATCH_JUMP); + InjectHook(0x546DB0, &cHandlingDataMgr::LoadHandlingData, PATCH_JUMP); + InjectHook(0x546BB0, &cHandlingDataMgr::ConvertDataToGameUnits, PATCH_JUMP); + InjectHook(0x546AA0, &cHandlingDataMgr::FindExactWord, PATCH_JUMP); + InjectHook(0x546B70, &cHandlingDataMgr::GetHandlingId, PATCH_JUMP); +ENDPATCHES |