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SIMUV2: Added a "tire height" parameter to car XMLs.

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git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@918 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: c8a9aa13e4a20b67925e6a0acac1a49ac94f3255
Former-commit-id: 11458ffc3fb76634097634af1ef4d294a5a3f7ed
This commit is contained in:
andrewsumner 2009-04-28 23:26:03 +00:00
parent bffc9f919d
commit e8994b3c6f
2 changed files with 11 additions and 3 deletions
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1
src/interfaces/car.h
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@ -460,6 +460,7 @@ typedef struct CarElt
#define PRM_MU "mu"
#define PRM_RIMDIAM "rim diameter"
#define PRM_TIREWIDTH "tire width"
#define PRM_TIREHEIGHT "tire height"
#define PRM_TIRERATIO "tire height-width ratio"
#define PRM_RIDEHEIGHT "ride height"
#define PRM_ROLLINGRESIST "rolling resistance"

13
src/modules/simu/simuv2/wheel.cpp
View file

@ -30,12 +30,13 @@ SimWheelConfig(tCar *car, int index)
void *hdle = car->params;
tCarElt *carElt = car->carElt;
tWheel *wheel = &(car->wheel[index]);
tdble rimdiam, tirewidth, tireratio, pressure;
tdble rimdiam, tirewidth, tireratio, pressure, tireheight;
tdble x0, Ca, RFactor, EFactor, patchLen;
pressure = GfParmGetNum(hdle, WheelSect[index], PRM_PRESSURE, (char*)NULL, 275600);
rimdiam = GfParmGetNum(hdle, WheelSect[index], PRM_RIMDIAM, (char*)NULL, 0.33f);
tirewidth = GfParmGetNum(hdle, WheelSect[index], PRM_TIREWIDTH, (char*)NULL, 0.145f);
tireheight = GfParmGetNum(hdle, WheelSect[index], PRM_TIREHEIGHT, (char*)NULL, -1.0f);
tireratio = GfParmGetNum(hdle, WheelSect[index], PRM_TIRERATIO, (char*)NULL, 0.75f);
wheel->mu = GfParmGetNum(hdle, WheelSect[index], PRM_MU, (char*)NULL, 1.0f);
wheel->I = GfParmGetNum(hdle, WheelSect[index], PRM_INERTIA, (char*)NULL, 1.5f);
@ -67,7 +68,10 @@ SimWheelConfig(tCar *car, int index)
patchLen = wheel->weight0 / (tirewidth * pressure);
wheel->radius = rimdiam / 2.0f + tirewidth * tireratio;
if (tireheight > 0.0)
wheel->radius = rimdiam / 2.0f + tireheight;
else
wheel->radius = rimdiam / 2.0f + tirewidth * tireratio;
wheel->tireSpringRate = wheel->weight0 / (wheel->radius * (1.0f - cos(asin(patchLen / (2.0f * wheel->radius)))));
wheel->relPos.x = wheel->staticPos.x = car->axle[index/2].xpos;
wheel->relPos.y = wheel->staticPos.y;
@ -80,7 +84,10 @@ SimWheelConfig(tCar *car, int index)
SimBrakeConfig(hdle, BrkSect[index], &(wheel->brake));
carElt->_rimRadius(index) = rimdiam / 2.0f;
carElt->_tireHeight(index) = tirewidth * tireratio;
if (tireheight > 0.0)
carElt->_tireHeight(index) = tireheight;
else
carElt->_tireHeight(index) = tirewidth * tireratio;
carElt->_tireWidth(index) = tirewidth;
carElt->_brakeDiskRadius(index) = wheel->brake.radius;
carElt->_wheelRadius(index) = wheel->radius;