示例#1
0
void
SimCarConfig(tCar *car)
{
	void	*hdle = car->params;
	tdble	k;
	tdble	w;
	tdble	gcfrl, gcrrl, gcfr;
	tdble	wf0, wr0;
	tdble	overallwidth;
	int		i;
	tCarElt	*carElt = car->carElt;
	
	car->dimension.x = GfParmGetNum(hdle, SECT_CAR, PRM_LEN, (char*)NULL, 4.7f);
	car->dimension.y = GfParmGetNum(hdle, SECT_CAR, PRM_WIDTH, (char*)NULL, 1.9f);
	overallwidth     = GfParmGetNum(hdle, SECT_CAR, PRM_OVERALLWIDTH, (char*)NULL, car->dimension.y);
	car->dimension.z = GfParmGetNum(hdle, SECT_CAR, PRM_HEIGHT, (char*)NULL, 1.2f);
	car->mass        = GfParmGetNum(hdle, SECT_CAR, PRM_MASS, (char*)NULL, 1500);
	car->Minv        = (tdble) (1.0 / car->mass);
	gcfr             = GfParmGetNum(hdle, SECT_CAR, PRM_FRWEIGHTREP, (char*)NULL, .5);
	gcfrl            = GfParmGetNum(hdle, SECT_CAR, PRM_FRLWEIGHTREP, (char*)NULL, .5);
	gcrrl            = GfParmGetNum(hdle, SECT_CAR, PRM_RRLWEIGHTREP, (char*)NULL, .5);
	car->statGC.y    = (tdble) (- (gcfr * gcfrl + (1 - gcfr) * gcrrl) * car->dimension.y + car->dimension.y / 2.0);
	car->statGC.z    = GfParmGetNum(hdle, SECT_CAR, PRM_GCHEIGHT, (char*)NULL, .5);
	
	car->tank        = GfParmGetNum(hdle, SECT_CAR, PRM_TANK, (char*)NULL, 80);
	car->fuel        = GfParmGetNum(hdle, SECT_CAR, PRM_FUEL, (char*)NULL, 80);
	k                = GfParmGetNum(hdle, SECT_CAR, PRM_CENTR, (char*)NULL, 1.0);
	carElt->_drvPos_x = GfParmGetNum(hdle, SECT_DRIVER, PRM_XPOS, (char*)NULL, 0.0);
	carElt->_drvPos_y = GfParmGetNum(hdle, SECT_DRIVER, PRM_YPOS, (char*)NULL, 0.0);
	carElt->_drvPos_z = GfParmGetNum(hdle, SECT_DRIVER, PRM_ZPOS, (char*)NULL, 0.0);
	carElt->_bonnetPos_x = GfParmGetNum(hdle, SECT_BONNET, PRM_XPOS, (char*)NULL, carElt->_drvPos_x);
	carElt->_bonnetPos_y = GfParmGetNum(hdle, SECT_BONNET, PRM_YPOS, (char*)NULL, carElt->_drvPos_y);
	carElt->_bonnetPos_z = GfParmGetNum(hdle, SECT_BONNET, PRM_ZPOS, (char*)NULL, carElt->_drvPos_z);
	
	if (car->fuel > car->tank) {
		car->fuel = car->tank;
	}
	k = k * k;
	car->Iinv.x = (tdble) (12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.z * car->dimension.z)));
	car->Iinv.y = (tdble) (12.0 / (car->mass * k * (car->dimension.x * car->dimension.x + car->dimension.z * car->dimension.z)));
	car->Iinv.z = (tdble) (12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.x * car->dimension.x)));
	
	/* configure components */
	w = car->mass * G;
	
	wf0 = w * gcfr;
	wr0 = w * (1 - gcfr);
	
	car->wheel[FRNT_RGT].weight0 = wf0 * gcfrl;
	car->wheel[FRNT_LFT].weight0 = wf0 * (1 - gcfrl);
	car->wheel[REAR_RGT].weight0 = wr0 * gcrrl;
	car->wheel[REAR_LFT].weight0 = wr0 * (1 - gcrrl);
	
	for (i = 0; i < 2; i++) {
		SimAxleConfig(car, i);
	}
	
	for (i = 0; i < 4; i++) {
		SimWheelConfig(car, i); 
	}
	
	
	SimEngineConfig(car);
	SimTransmissionConfig(car);
	SimSteerConfig(car);
	SimBrakeSystemConfig(car);
	SimAeroConfig(car);
	for (i = 0; i < 2; i++) {
		SimWingConfig(car, i);
	}
	
	/* Set the origin to GC */
	car->wheelbase = car->wheeltrack = 0;
	car->statGC.x = car->wheel[FRNT_RGT].staticPos.x * gcfr + car->wheel[REAR_RGT].staticPos.x * (1 - gcfr);
	
	carElt->_dimension = car->dimension;
	carElt->_statGC = car->statGC;
	carElt->_tank = car->tank;
	for (i = 0; i < 4; i++) {
		carElt->priv.wheel[i].relPos = car->wheel[i].relPos;
	}
	
	for (i = 0; i < 4; i++) {
		car->wheel[i].staticPos.x -= car->statGC.x;
		car->wheel[i].staticPos.y -= car->statGC.y;
	}
	car->wheelbase = (tdble) ((car->wheel[FRNT_RGT].staticPos.x 
				+ car->wheel[FRNT_LFT].staticPos.x
				- car->wheel[REAR_RGT].staticPos.x
				- car->wheel[REAR_LFT].staticPos.x) / 2.0);
	car->wheeltrack = (tdble) ((-car->wheel[REAR_LFT].staticPos.y 
				- car->wheel[FRNT_LFT].staticPos.y
				+ car->wheel[FRNT_RGT].staticPos.y
				+ car->wheel[REAR_RGT].staticPos.y) / 2.0);
	
	/* set corners pos */
	car->corner[FRNT_RGT].pos.x = (tdble) (car->dimension.x * .5 - car->statGC.x);
	car->corner[FRNT_RGT].pos.y = (tdble) (- overallwidth * .5 - car->statGC.y);
	car->corner[FRNT_RGT].pos.z = 0;
	
	car->corner[FRNT_LFT].pos.x = (tdble) (car->dimension.x * .5 - car->statGC.x);
	car->corner[FRNT_LFT].pos.y = (tdble) (overallwidth * .5 - car->statGC.y);
	car->corner[FRNT_LFT].pos.z = 0;
	
	car->corner[REAR_RGT].pos.x = (tdble) (- car->dimension.x * .5 - car->statGC.x);
	car->corner[REAR_RGT].pos.y = (tdble) (- overallwidth * .5 - car->statGC.y);
	car->corner[REAR_RGT].pos.z = 0;
	
	car->corner[REAR_LFT].pos.x = (tdble) (- car->dimension.x * .5 - car->statGC.x);
	car->corner[REAR_LFT].pos.y = (tdble) (overallwidth * .5 - car->statGC.y);
	car->corner[REAR_LFT].pos.z = 0;
}
示例#2
0
void
SimCarConfig(tCar *car)
{
    void	*hdle = car->params;
    tdble	k;
    tdble	w;
    tdble	gcfrl, gcrrl, gcfr;
    tdble	wf0, wr0;
    tdble	overallwidth;
    int		i;
    tCarElt	*carElt = car->carElt;

    car->options = new SimulationOptions;
    car->options->SetFromSkill (carElt->_skillLevel);
    car->options->LoadFromFile (hdle);

    car->fuel_time = 0.0;
    car->fuel_consumption = 0.0;
    car->carElt->_fuelTotal = 0.0;
    car->carElt->_fuelInstant = 10.0;

    car->carElt->priv.collision_state.collision_count = 0;
    for (i=0; i<3; i++) {
        car->carElt->priv.collision_state.pos[0] = 0.0;
        car->carElt->priv.collision_state.force[0] = 0.0;
    }

    car->dimension.x = GfParmGetNum(hdle, SECT_CAR, PRM_LEN, (char*)NULL, 4.7);
    car->dimension.y = GfParmGetNum(hdle, SECT_CAR, PRM_WIDTH, (char*)NULL, 1.9);
    overallwidth     = GfParmGetNum(hdle, SECT_CAR, PRM_OVERALLWIDTH, (char*)NULL, car->dimension.y);
    car->dimension.z = GfParmGetNum(hdle, SECT_CAR, PRM_HEIGHT, (char*)NULL, 1.2);
    car->mass        = GfParmGetNum(hdle, SECT_CAR, PRM_MASS, (char*)NULL, 1500);
    car->Minv        = 1.0 / car->mass;
    gcfr             = GfParmGetNum(hdle, SECT_CAR, PRM_FRWEIGHTREP, (char*)NULL, .5);
    gcfrl            = GfParmGetNum(hdle, SECT_CAR, PRM_FRLWEIGHTREP, (char*)NULL, .5);
    gcrrl            = GfParmGetNum(hdle, SECT_CAR, PRM_RRLWEIGHTREP, (char*)NULL, .5);
    car->statGC.y    = - (gcfr * gcfrl + (1 - gcfr) * gcrrl) * car->dimension.y + car->dimension.y / 2.0;
    car->statGC.z    = GfParmGetNum(hdle, SECT_CAR, PRM_GCHEIGHT, (char*)NULL, .5);
    
    car->tank        = GfParmGetNum(hdle, SECT_CAR, PRM_TANK, (char*)NULL, 80);
    car->fuel        = GfParmGetNum(hdle, SECT_CAR, PRM_FUEL, (char*)NULL, 80);
    k                = GfParmGetNum(hdle, SECT_CAR, PRM_CENTR, (char*)NULL, 1.0);
    carElt->_drvPos_x = GfParmGetNum(hdle, SECT_DRIVER, PRM_XPOS, (char*)NULL, 0.0);
    carElt->_drvPos_y = GfParmGetNum(hdle, SECT_DRIVER, PRM_YPOS, (char*)NULL, 0.0);
    carElt->_drvPos_z = GfParmGetNum(hdle, SECT_DRIVER, PRM_ZPOS, (char*)NULL, 0.0);
    carElt->_bonnetPos_x = GfParmGetNum(hdle, SECT_BONNET, PRM_XPOS, (char*)NULL, carElt->_drvPos_x);
    carElt->_bonnetPos_y = GfParmGetNum(hdle, SECT_BONNET, PRM_YPOS, (char*)NULL, carElt->_drvPos_y);
    carElt->_bonnetPos_z = GfParmGetNum(hdle, SECT_BONNET, PRM_ZPOS, (char*)NULL, carElt->_drvPos_z);

    if (car->fuel > car->tank) {
        car->fuel = car->tank;
    }
    car->fuel_prev = car->fuel;
    k = k * k; 
    car->Iinv.x = 12.0 / (car->mass * (car->dimension.y * car->dimension.y + k *car->dimension.z * car->dimension.z));
    car->Iinv.y = 12.0 / (car->mass * (car->dimension.x * car->dimension.x + k * car->dimension.z * car->dimension.z));
    car->Iinv.z = 12.0 / (car->mass * (car->dimension.y * car->dimension.y + k * car->dimension.x * car->dimension.x));
    
    // initialise rotational momentum
    for (i=0; i<4; i++) {
        car->rot_mom[i] = 0.0;
    }
    car->rot_mom[SG_W] = 1.0;

    /* configure components */
    w = car->mass * G;

    wf0 = w * gcfr;
    wr0 = w * (1 - gcfr);

    car->wheel[FRNT_RGT].weight0 = wf0 * gcfrl;
    car->wheel[FRNT_LFT].weight0 = wf0 * (1 - gcfrl);
    car->wheel[REAR_RGT].weight0 = wr0 * gcrrl;
    car->wheel[REAR_LFT].weight0 = wr0 * (1 - gcrrl);

    for (i = 0; i < 2; i++) {
        SimAxleConfig(car, i);
    }

    for (i = 0; i < 4; i++) {
        SimWheelConfig(car, i);	    
    }


    SimEngineConfig(car);
    SimTransmissionConfig(car);
    SimSteerConfig(car);
    SimBrakeSystemConfig(car);
    SimAeroConfig(car);
    for (i = 0; i < 2; i++) {
        SimWingConfig(car, i);
    }
    
    /* Set the origin to GC */
    car->wheelbase = car->wheeltrack = 0;
    car->statGC.x = car->wheel[FRNT_RGT].staticPos.x * gcfr + car->wheel[REAR_RGT].staticPos.x * (1 - gcfr);

    carElt->_dimension = car->dimension;
    carElt->_statGC = car->statGC;
    carElt->_tank = car->tank;
    for (i = 0; i < 4; i++) {
        carElt->priv.wheel[i].relPos = car->wheel[i].relPos;
    }

    for (i = 0; i < 4; i++) {
        car->wheel[i].staticPos.x -= car->statGC.x;
        car->wheel[i].staticPos.y -= car->statGC.y;
    }
    car->wheelbase = (car->wheel[FRNT_RGT].staticPos.x 
                      + car->wheel[FRNT_LFT].staticPos.x
                      - car->wheel[REAR_RGT].staticPos.x
                      - car->wheel[REAR_LFT].staticPos.x) / 2.0;
    car->wheeltrack = (-car->wheel[REAR_LFT].staticPos.y 
                       - car->wheel[FRNT_LFT].staticPos.y
                       + car->wheel[FRNT_RGT].staticPos.y
                       + car->wheel[REAR_RGT].staticPos.y) / 2.0;

    /* set corners pos */
    car->corner[FRNT_RGT].pos.x = car->dimension.x * .5 - car->statGC.x;
    car->corner[FRNT_RGT].pos.y = - overallwidth * .5 - car->statGC.y;
    car->corner[FRNT_RGT].pos.z = 0;
    car->corner[FRNT_LFT].pos.x = car->dimension.x * .5 - car->statGC.x;
    car->corner[FRNT_LFT].pos.y = overallwidth * .5 - car->statGC.y;
    car->corner[FRNT_LFT].pos.z = 0;
    car->corner[REAR_RGT].pos.x = - car->dimension.x * .5 - car->statGC.x;
    car->corner[REAR_RGT].pos.y = - overallwidth * .5 - car->statGC.y;
    car->corner[REAR_RGT].pos.z = 0;
    car->corner[REAR_LFT].pos.x = - car->dimension.x * .5 - car->statGC.x;
    car->corner[REAR_LFT].pos.y = overallwidth * .5 - car->statGC.y;
    car->corner[REAR_LFT].pos.z = 0;
    car->upside_down_timer = 0.0f;
}
示例#3
0
void
SimCarConfig(tCar *car)
{
	void	*hdle = car->params;
	tdble	k;
	tdble	w;
	tdble	gcfrl, gcrrl, gcfr;
	tdble	wf0, wr0;
	tdble	overallwidth;
	int		i;
	tCarElt	*carElt = car->carElt;
	const char *enabling;
	
	/* get features first */
	car->features = 0;
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_AEROTOCG, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_AEROTOCG;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_SLOWGRIP, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_SLOWGRIP;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_REALGEARCHANGE, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_REALGEARCHANGE;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_REVLIMIT, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_REVLIMIT;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_TIRETEMPDEG, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_TIRETEMPDEG;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_FIXEDWHEELFORCE, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_FIXEDWHEELFORCE;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_TCLINSIMU, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_TCLINSIMU;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_ABSINSIMU, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_ABSINSIMU;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_ESPINSIMU, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_ESPINSIMU;
	}
	enabling = GfParmGetStr(hdle, SECT_FEATURES, PRM_LIMITEDGROUNDEFFECT, VAL_NO);
	if (strcmp(enabling, VAL_YES) == 0) {
		car->features = car->features | FEAT_LIMITEDGROUNDEFFECT;
	}

	
	/* continue with car parameters */
	car->dimension.x = GfParmGetNum(hdle, SECT_CAR, PRM_LEN, (char*)NULL, 4.7f);
	car->dimension.y = GfParmGetNum(hdle, SECT_CAR, PRM_WIDTH, (char*)NULL, 1.9f);
	overallwidth     = GfParmGetNum(hdle, SECT_CAR, PRM_OVERALLWIDTH, (char*)NULL, car->dimension.y);
	car->dimension.z = GfParmGetNum(hdle, SECT_CAR, PRM_HEIGHT, (char*)NULL, 1.2f);
	car->mass        = GfParmGetNum(hdle, SECT_CAR, PRM_MASS, (char*)NULL, 1500);
	car->Minv        = (tdble) (1.0 / car->mass);
	gcfr             = GfParmGetNum(hdle, SECT_CAR, PRM_FRWEIGHTREP, (char*)NULL, .5);
	gcfrl            = GfParmGetNum(hdle, SECT_CAR, PRM_FRLWEIGHTREP, (char*)NULL, .5);
	gcrrl            = GfParmGetNum(hdle, SECT_CAR, PRM_RRLWEIGHTREP, (char*)NULL, .5);
	car->statGC.y    = (tdble) (- (gcfr * gcfrl + (1 - gcfr) * gcrrl) * car->dimension.y + car->dimension.y / 2.0);
	car->statGC.z    = GfParmGetNum(hdle, SECT_CAR, PRM_GCHEIGHT, (char*)NULL, .5);
	
	car->tank        = GfParmGetNum(hdle, SECT_CAR, PRM_TANK, (char*)NULL, 80);
	car->fuel        = GfParmGetNum(hdle, SECT_CAR, PRM_FUEL, (char*)NULL, 80);
	k                = GfParmGetNum(hdle, SECT_CAR, PRM_CENTR, (char*)NULL, 1.0);
	carElt->_drvPos_x = GfParmGetNum(hdle, SECT_DRIVER, PRM_XPOS, (char*)NULL, 0.0);
	carElt->_drvPos_y = GfParmGetNum(hdle, SECT_DRIVER, PRM_YPOS, (char*)NULL, 0.0);
	carElt->_drvPos_z = GfParmGetNum(hdle, SECT_DRIVER, PRM_ZPOS, (char*)NULL, 0.0);
	carElt->_bonnetPos_x = GfParmGetNum(hdle, SECT_BONNET, PRM_XPOS, (char*)NULL, carElt->_drvPos_x);
	carElt->_bonnetPos_y = GfParmGetNum(hdle, SECT_BONNET, PRM_YPOS, (char*)NULL, carElt->_drvPos_y);
	carElt->_bonnetPos_z = GfParmGetNum(hdle, SECT_BONNET, PRM_ZPOS, (char*)NULL, carElt->_drvPos_z);
	
	if (car->fuel > car->tank) {
		car->fuel = car->tank;
	}
	k = k * k;
	car->Iinv.x = (tdble) (12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.z * car->dimension.z)));
	car->Iinv.y = (tdble) (12.0 / (car->mass * k * (car->dimension.x * car->dimension.x + car->dimension.z * car->dimension.z)));
	car->Iinv.z = (tdble) (12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.x * car->dimension.x)));
	
	/* configure components */
	tdble K[4], Kfheave, Krheave;
	for (i = 0; i < 4; i++) {
		K[i] = GfParmGetNum(hdle, SuspSect[i], PRM_SPR, (char*)NULL, 175000.0f);
	}
	Kfheave = GfParmGetNum(hdle, SECT_FRNTHEAVE, PRM_SPR, (char*)NULL, 0.0f);
	Krheave = GfParmGetNum(hdle, SECT_REARHEAVE, PRM_SPR, (char*)NULL, 0.0f);
	/* wheel force bugfix is needed for heave springs */
	if ( (Kfheave > 0.0f) || (Krheave > 0.0f) ) 
		{car->features = car->features | FEAT_FIXEDWHEELFORCE;}
	
	w = car->mass * G;
	
	wf0 = w * gcfr;
	wr0 = w * (1 - gcfr);
	
	car->wheel[FRNT_RGT].weight0 = wf0 * gcfrl * K[FRNT_RGT] / (K[FRNT_RGT] + 0.5f*Kfheave);
	car->wheel[FRNT_LFT].weight0 = wf0 * (1 - gcfrl) * K[FRNT_LFT] / (K[FRNT_LFT] + 0.5f*Kfheave);
	car->wheel[REAR_RGT].weight0 = wr0 * gcrrl * K[REAR_RGT] / (K[REAR_RGT] + 0.5f*Krheave);
	car->wheel[REAR_LFT].weight0 = wr0 * (1 - gcrrl) * K[REAR_LFT] / (K[REAR_LFT] + 0.5f*Krheave);
	
	/*for (i = 0; i < 2; i++) {
		SimAxleConfig(car, i, 0.0);
	}*/
	if (Kfheave > 0.0f) {
		wf0 = (wf0 - car->wheel[FRNT_RGT].weight0 - car->wheel[FRNT_LFT].weight0);
		SimAxleConfig(car, FRNT, wf0);
	} else { SimAxleConfig(car, FRNT, 0.0f); }
	if (Krheave > 0.0f) {
		wr0 = (wr0 - car->wheel[REAR_RGT].weight0 - car->wheel[REAR_LFT].weight0);
		SimAxleConfig(car, REAR, wr0);
	} else { SimAxleConfig(car, REAR, 0.0f); }
	
	for (i = 0; i < 4; i++) {
		SimWheelConfig(car, i); 
	}

	SimEngineConfig(car);
	SimTransmissionConfig(car);
	SimSteerConfig(car);
	SimBrakeSystemConfig(car);
	SimAeroConfig(car);
	for (i = 0; i < 2; i++) {
		SimWingConfig(car, i);
	}
	
	/* Set the origin to GC */
	car->wheelbase = car->wheeltrack = 0;
	car->statGC.x = car->wheel[FRNT_RGT].staticPos.x * gcfr + car->wheel[REAR_RGT].staticPos.x * (1 - gcfr);
	
	carElt->_dimension = car->dimension;
	carElt->_statGC = car->statGC;
	carElt->_tank = car->tank;
	for (i = 0; i < 4; i++) {
		carElt->priv.wheel[i].relPos = car->wheel[i].relPos;
	}
	
	for (i = 0; i < 4; i++) {
		car->wheel[i].staticPos.x -= car->statGC.x;
		car->wheel[i].staticPos.y -= car->statGC.y;
	}
	car->wheelbase = (tdble) ((car->wheel[FRNT_RGT].staticPos.x 
				+ car->wheel[FRNT_LFT].staticPos.x
				- car->wheel[REAR_RGT].staticPos.x
				- car->wheel[REAR_LFT].staticPos.x) / 2.0);
	car->wheeltrack = (tdble) ((-car->wheel[REAR_LFT].staticPos.y 
				- car->wheel[FRNT_LFT].staticPos.y
				+ car->wheel[FRNT_RGT].staticPos.y
				+ car->wheel[REAR_RGT].staticPos.y) / 2.0);
	
	/* set corners pos */
	car->corner[FRNT_RGT].pos.x = (tdble) (car->dimension.x * .5 - car->statGC.x);
	car->corner[FRNT_RGT].pos.y = (tdble) (- overallwidth * .5 - car->statGC.y);
	car->corner[FRNT_RGT].pos.z = 0;
	
	car->corner[FRNT_LFT].pos.x = (tdble) (car->dimension.x * .5 - car->statGC.x);
	car->corner[FRNT_LFT].pos.y = (tdble) (overallwidth * .5 - car->statGC.y);
	car->corner[FRNT_LFT].pos.z = 0;
	
	car->corner[REAR_RGT].pos.x = (tdble) (- car->dimension.x * .5 - car->statGC.x);
	car->corner[REAR_RGT].pos.y = (tdble) (- overallwidth * .5 - car->statGC.y);
	car->corner[REAR_RGT].pos.z = 0;
	
	car->corner[REAR_LFT].pos.x = (tdble) (- car->dimension.x * .5 - car->statGC.x);
	car->corner[REAR_LFT].pos.y = (tdble) (overallwidth * .5 - car->statGC.y);
	car->corner[REAR_LFT].pos.z = 0;
	
	/* set wing positions */
	if (car->features & FEAT_AEROTOCG) {
		for (i = 0; i < 2; i++) {
			car->wing[i].staticPos.x -= car->statGC.x;
			car->wing[i].staticPos.y -= car->statGC.y;
			car->wing[i].staticPos.z -= car->statGC.z;
		}
	}
}