Re: simuv2 bug update

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Brian Martin wrote:
| I have done a lot of testing since my last post. Two cars will behave
| unnaturally when they become air-born. The cars will stand up on one
| or two wheels and slowly settle on the track. The cars will then drive
| normally. Again, this  problem occurs with  a combination  of low mass
| and high spring pressure.
|

OK, this makes sense. I will test later and include in the main code.

| This  code  change will solve the problem:
|
| In wheel.cpp:
|
| void SimWheelUpdateRide(tCar *car, int index)
| {
|     tWheel *wheel = &(car->wheel[index]);
|     tdble Zroad;
|
|     // compute suspension travel
|     RtTrackGlobal2Local(car->trkPos.seg, wheel->pos.x, wheel->pos.y,
| &(wheel->trkPos), TR_LPOS_SEGMENT);
|     wheel->zRoad = Zroad = RtTrackHeightL(&(wheel->trkPos));
|
|
|     // Wheel susp.x is not the wheel movement, look at SimSuspCheckIn,
| it becomes there scaled with
|     // susp->spring.bellcrank, so we invert this here.
|     //tdble prexwheel = wheel->susp.x / wheel->susp.spring.bellcrank;
|
|     // unreliable value tdble new_susp_x= prexwheel - wheel->rel_vel *
| SimDeltaTime;
|
|
|         tdble max_extend =  wheel->pos.z - Zroad;
|     wheel->rideHeight = max_extend;
|
| //////////////////////test///////////////////
|     tdble prex = wheel->susp.x;
| //////////////////////////////////////////////////
|
|
|     if (max_extend < wheel->susp.x) {
|         wheel->susp.x = max_extend;
|         wheel->rel_vel = 0.0f;
|     } else if (wheel->susp.x < wheel->susp.spring.packers) {
|         //////////////test (fixes elevated car at race start for most
| cars)///
|         wheel->susp.x = wheel->susp.spring.packers;
|         /////////////////////////////////////////////////////
|         wheel->rel_vel = 0.0f;
|     ///////////////test fixes all mispositioned car problems/////
|     }else{
|         //wheel->susp.x = new_susp_x;
|         wheel->susp.x = wheel->pos.z - Zroad;
|     }
|     //////////////////////////////////////////////////////////////
|
| //    tdble prex = wheel->susp.x;
|
|
| //    wheel->susp.x = new_susp_x;
|
|
|     // verify the suspension travel, beware, wheel->susp.x will be
| scaled by SimSuspCheckIn
|     SimSuspCheckIn(&(wheel->susp));
|     wheel->susp.v = (prex - wheel->susp.x) / SimDeltaTime;
|
|     // update wheel brake
|     SimBrakeUpdate(car, wheel, &(wheel->brake));
|
| }
|
| This code will also solve the problem of simuv going berzerk with huge
| damper rebound values.
|
|
- 
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