protected override void Draw(GameTime gameTime)
{
base.Draw(gameTime);
_engine.Draw();
// Draw the torus knot
{
Matrix[] transforms = new Matrix[_torusModel.Bones.Count];
_torusModel.CopyAbsoluteBoneTransformsTo(transforms);
foreach (ModelMesh mesh in _torusModel.Meshes)
{
foreach (BasicEffect effect in mesh.Effects)
{
effect.EnableDefaultLighting();
effect.World = Matrix.CreateScale(0.1f, 0.1f, 0.1f) * transforms[mesh.ParentBone.Index] * _torusActor.GlobalPose;
effect.View = _engine.Camera.View;
effect.Projection = _engine.Camera.Projection;
}
mesh.Draw();
}
}
// Display basic info about the vehicle
WheelContactData contactData = _basicVehicle.LeftFront.GetContactData();
Vector3 readOut = contactData.LongitudalDirection;
this.Window.Title = String.Format("LongitudalDirection: {0:0.00},{1:0.00},{2:0.00}", readOut.X, readOut.Y, readOut.Z);
}
private void UpdateMatrices(WheelContactData wcd)
{
if (wcd.ContactShape == null)
{
CurrentSuspensionTravel = Shape.SuspensionTravel;
}
else
{
CurrentSuspensionTravel = wcd.ContactPosition - Shape.Radius;
}
if (_handbrake != 1)
{
if (IsSkiddingLng && Shape.MotorTorque != 0)
{
_rotationMatrix *= Matrix.CreateRotationX(-0.3f);
}
else
{
_rotationMatrix *= Matrix.CreateRotationX(MathHelper.ToRadians(Shape.AxleSpeed));
}
}
else
{
}
Matrix translation = Matrix.CreateTranslation(_axleOffset, -CurrentSuspensionTravel, 0.0f);
_renderMatrix = _rotationMatrix * Matrix.CreateRotationY(Shape.SteeringAngle) * translation;
}
public void Update()
{
WheelContactData wcd = Shape.GetContactData();
UpdateMatrices(wcd);
ContactPoint = wcd.ContactPoint;
SmokeEmitter.Enabled = false;
IsSkiddingLat = IsSkiddingLng = ShouldPlaySkidSound = false;
if (wcd.ContactForce != 0)
{
int materialIndex = (int)wcd.OtherShapeMaterialIndex;
MaterialModifier materialModifier = Race.Current.ConfigFile.MaterialModifiers[materialIndex];
materialModifier.UpdateWheelShape(_chassis, this);
LatSlip = wcd.LateralSlip;
if (_chassis.Speed > 10 && (_handbrake == 1 || Math.Abs(wcd.LateralSlip) > 0.23f))
{
IsSkiddingLat = true;
SmokeEmitter.Enabled = true;
}
else if (_chassis.Speed > 3 && Shape.MotorTorque != 0 && CActor.IsDriven && wcd.LongitudalSlip > 0.04f)
{
IsSkiddingLng = true;
SmokeEmitter.Enabled = true;
}
// Setup tire functions taking into account handbrake and terrain
float latExtremum = _defaultLatExtremum;
if (IsRear)
{
latExtremum = MathHelper.Lerp(1.9f, 1.05f, _handbrake);
}
latExtremum *= materialModifier.TyreRoadFriction;
_latTireFn.ExtremumValue = latExtremum;
_lngTireFn.ExtremumValue = _defaultLngExtremum * materialModifier.TyreRoadFriction;
Shape.LateralTireForceFunction = _latTireFn;
Shape.LongitudalTireForceFunction = _lngTireFn;
ShouldPlaySkidSound = IsSkiddingLat | IsSkiddingLng && materialIndex == 0;
SmokeEmitter.Update(wcd.ContactPoint);
}
}
