public void RunPhysics(float deltaTime)
{
int i = 0;
if (this.strictCollisions && this.numHits > 0)
{
float x = 0f;
float y = 0f;
for (i = 0; i < NUM_COLLISION_POINTS; i += 1)
{
this.collPoint[i].set(this.oldCollPt[i]);
this.collPtHit[i] = this.oldCollPtHit[i];
x += this.collPoint[i].x;
y += this.collPoint[i].y;
}
this.position.x = x / IntToFloat(NUM_COLLISION_POINTS);
this.position.y = y / IntToFloat(NUM_COLLISION_POINTS);
}
else
{
for (i = 0; i < NUM_COLLISION_POINTS; i += 1)
{
this.oldCollPt[i].set(this.collPoint[i]);
}
}
for (i = 0; i < NUM_COLLISION_POINTS; i += 1)
{
this.oldCollPtHit[i] = this.collPtHit[i];
this.oldCollPtCarHit[i] = this.collPtCarHit[i];
}
this.RunPhysicsBase(deltaTime);
this.UpdateBody();
this.UpdateEnviroment();
this.enginePower = this.engineMaxPower * this.engineAccelerator;
this.driveWheelTorque = this.enginePower;
this.driveWheelTorque -= this.driveWheelTorque * this.brakePower;
this.driveWheelForce = this.driveWheelTorque * this.driveWheelGrip;
VectorF rollDirection = this.direction.clone();
VectorF slideDirection = rollDirection.clone();
slideDirection.rotate(Maths.Pi / 2.0f);
float rollingVelocity = VectorF.projection(this.velocity, rollDirection);
float slidingVelocity = VectorF.projection(this.velocity, slideDirection);
this.turningAccel.makeZero();
if (this.velocity.isZero())
{
this.angularVelocity = this.steeringWheelAngle * this.stillTurningVelocity;
}
else
{
if (this.steeringWheelAngle != 0.0f)
{
float steerAngle = this.steeringWheelAngle;
VectorF driveWheelPos = this.position.clone();
VectorF steerWheelPos = this.position.clone();
driveWheelPos.addScaled(this.direction, -this.distanceBetweenAxles / 2.0f);
steerWheelPos.addScaled(this.direction, this.distanceBetweenAxles / 2.0f);
VectorF driveWheelMovement = rollDirection.clone();
VectorF steerWheelMovement = rollDirection.clone();
steerWheelMovement.rotate(steerAngle);
driveWheelPos.addScaled(driveWheelMovement, rollingVelocity);
steerWheelPos.addScaled(steerWheelMovement, rollingVelocity);
VectorF newPosDir = VectorF.subtract(steerWheelPos, driveWheelPos);
newPosDir.normalize();
this.angularVelocity = VectorF.angleBetween(this.direction, newPosDir);
this.angularVelocity *= this.envGrip;
float dumb_drift_factor = Maths.ArcTan(Maths.AbsF(rollingVelocity / this.driftVelocityFactor)) / (Maths.Pi / 2.0f);
this.turningAccel = VectorF.subtract(newPosDir, rollDirection);
this.turningAccel.scale(rollingVelocity * (1.0f - dumb_drift_factor) * this.envGrip);
}
else
{
this.angularVelocity = 0.0f;
}
}
VectorF rollResDir = rollDirection.clone();
rollResDir.scale(-rollingVelocity);
rollResDir.normalize();
VectorF slideResDir = slideDirection.clone();
slideResDir.scale(-slidingVelocity);
slideResDir.normalize();
float driveForce = (this.driveWheelForce * deltaTime) / this.bodyMass;
rollingVelocity = Maths.AbsF(rollingVelocity);
slidingVelocity = Maths.AbsF(slidingVelocity);
float slide_friction = this.envSlideFriction * this.weightForce;
float roll_friction = this.envRollFriction * this.weightForce;
float airres_force = 0.5f * Track.AirResistance * this.bodyAerodynamics;
float env_res_force = this.envResistance;
float rollAF = ((slide_friction * this.brakePower + roll_friction * (1.0f - this.brakePower) + airres_force * rollingVelocity * rollingVelocity + env_res_force * rollingVelocity) * deltaTime) / this.bodyMass;
float slideAF = ((slide_friction + airres_force * slidingVelocity * slidingVelocity + env_res_force * slidingVelocity) * deltaTime) / this.bodyMass;
rollAF = Maths.ClampF(rollAF, 0.0f, rollingVelocity);
slideAF = Maths.ClampF(slideAF, 0.0f, slidingVelocity);
this.infoRollAntiforce = rollAF;
this.infoSlideAntiforce = slideAF;
this.velocity.addScaled(rollDirection, driveForce);
float x1 = this.velocity.x;
float y1 = this.velocity.y;
this.velocity.addScaled(slideResDir, slideAF);
this.velocity.addScaled(rollResDir, rollAF);
float x2 = this.velocity.x;
float y2 = this.velocity.y;
if (x1 >= 0.0 && x2 < 0.0 || x1 <= 0.0 && x2 > 0.0f)
{
this.velocity.x = 0.0f;
}
if (y1 >= 0.0 && y2 < 0.0 || y1 <= 0.0 && y2 > 0.0f)
{
this.velocity.y = 0.0f;
}
this.velocity.addScaled(this.turningAccel, deltaTime);
VectorF impactVelocity = VectorF.zero();
this.RunCollision(impactVelocity, deltaTime);
this.velocity.add(impactVelocity);
this.infoImpact.set(impactVelocity);
}