From a672860c401aa1ca179fce42e439c59f8d07f6d8 Mon Sep 17 00:00:00 2001 From: aap Date: Sat, 16 Jan 2021 19:38:05 +0100 Subject: initial work on vehicles --- src/vehicles/HandlingMgr.cpp | 83 ++++++++++++++++++++++---------------------- 1 file changed, 41 insertions(+), 42 deletions(-) (limited to 'src/vehicles/HandlingMgr.cpp') diff --git a/src/vehicles/HandlingMgr.cpp b/src/vehicles/HandlingMgr.cpp index 040b6972..1a8d059c 100644 --- a/src/vehicles/HandlingMgr.cpp +++ b/src/vehicles/HandlingMgr.cpp @@ -115,18 +115,17 @@ void cHandlingDataMgr::LoadHandlingData(void) { char *start, *end; - char line[201]; // weird value + char line[300]; 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"); + ssize_t filesz = CFileMgr::LoadFile(HandlingFilename, work_buff, sizeof(work_buff), "r"); CFileMgr::SetDir(""); start = (char*)work_buff; @@ -135,21 +134,18 @@ cHandlingDataMgr::LoadHandlingData(void) flyingHandling = nil; boatHandling = nil; bikeHandling = nil; - keepGoing = 1; - while(keepGoing){ + while(start < (char*)&work_buff[filesz]){ // 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; + break; else if(line[0] != ';'){ if(line[0] == '!'){ // Bike data @@ -263,19 +259,19 @@ cHandlingDataMgr::LoadHandlingData(void) 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 2: handling->fTurnMass = atof(word); break; + case 3: handling->fDragMult = atof(word); break; + case 4: handling->CentreOfMass.x = atof(word); break; + case 5: handling->CentreOfMass.y = atof(word); break; + case 6: handling->CentreOfMass.z = atof(word); break; + case 7: handling->nPercentSubmerged = atoi(word); break; + case 8: handling->fTractionMultiplier = atof(word); break; + case 9: handling->fTractionLoss = atof(word); break; + case 10: handling->fTractionBias = atof(word); break; + case 11: handling->Transmission.nNumberOfGears = atoi(word); break; + case 12: handling->Transmission.fMaxVelocity = atof(word); break; + case 13: handling->Transmission.fEngineAcceleration = atof(word) * 0.4; break; + case 14: handling->Transmission.fEngineInertia = atof(word); break; case 15: handling->Transmission.nDriveType = word[0]; break; case 16: handling->Transmission.nEngineType = word[0]; break; case 17: handling->fBrakeDeceleration = atof(word); break; @@ -284,25 +280,28 @@ cHandlingDataMgr::LoadHandlingData(void) 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: + // case 23: // fSuspensionHighSpdComDamp unused + case 24: handling->fSuspensionUpperLimit = atof(word); break; + case 25: handling->fSuspensionLowerLimit = atof(word); break; + case 26: handling->fSuspensionBias = atof(word); break; + case 27: handling->fSuspensionAntidiveMultiplier = atof(word); break; + case 28: handling->fSeatOffsetDistance = atof(word); break; + case 29: handling->fCollisionDamageMultiplier = atof(word); break; + case 30: handling->nMonetaryValue = atoi(word); break; + case 31: sscanf(word, "%x", &handling->Flags); - handling->Transmission.Flags = handling->Flags; + // handling->Transmission.Flags = handling->Flags; break; - case 31: handling->FrontLights = atoi(word); break; - case 32: handling->RearLights = atoi(word); break; + case 32: handling->FrontLights = atoi(word); break; + case 33: handling->RearLights = atoi(word); break; } field++; } ConvertDataToGameUnits(handling); } } + start = end+1; + end = start+1; } } @@ -330,12 +329,9 @@ cHandlingDataMgr::ConvertDataToGameUnits(tHandlingData *handling) 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; + handling->fInvMass = 1.0f/handling->GetMass(); + handling->fCollisionDamageMultiplier = handling->GetCollisionDamageMultiplier() * 2000.0f/handling->GetMass(); + handling->fBuoyancy = 100.0f/handling->nPercentSubmerged * GRAVITY*handling->GetMass(); // 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 @@ -348,10 +344,13 @@ cHandlingDataMgr::ConvertDataToGameUnits(tHandlingData *handling) 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); + // no idea what's happening here + float drag; + if(handling->fDragMult < 0.01f) + drag = 1.0f - 1.0f/(SQR(velocity)*handling->fDragMult + 1.0f); + else + drag = 0.0005f*handling->fDragMult * velocity; + b = velocity * drag; } if(handling->nIdentifier == HANDLING_RCBANDIT){ -- cgit v1.2.3