R3.D3.RaycastWheel = function(
    engine,
    chassisConnectionPointLocal,
    chassisConnectionPointWorld,
    directionLocal,
    directionWorld,
    axleLocal,
    axleWorld,
    suspensionRestLength,
    suspensionMaxLength,
    radius,
    suspensionStiffness,
    dampingCompression,
    dampingRelaxation,
    frictionSlip,
    steering,
    rotation,
    deltaRotation,
    rollInfluence,
    maxSuspensionForce,
    clippedInvContactDotSuspension,
    suspensionRelativeVelocity,
    suspensionForce,
    skidInfo,
    suspensionLength,
    maxSuspensionTravel,
    useCustomSlidingRotationalSpeed,
    customSlidingRotationalSpeed
) {
    this.engine = engine;
    this.engine.isNotCannonThrow();

    this.id = R3.Utils.RandomId();

	if(typeof chassisConnectionPointLocal == 'undefined' || chassisConnectionPointLocal == null) {
		chassisConnectionPointLocal = new this.engine.instance.Vec3();
	}
	this.chassisConnectionPointLocal = chassisConnectionPointLocal;

	if(typeof chassisConnectionPointWorld == 'undefined' || chassisConnectionPointWorld == null) {
		chassisConnectionPointWorld = new this.engine.instance.Vec3();
	}
	this.chassisConnectionPointWorld = chassisConnectionPointWorld;

	if(typeof directionLocal == 'undefined' || directionLocal == null) {
		directionLocal = new this.engine.instance.Vec3();
	}
	this.directionLocal = directionLocal;

	if(typeof directionWorld == 'undefined' || directionWorld == null) {
		directionWorld = new this.engine.instance.Vec3();
	}
	this.directionWorld = directionWorld;

	if(typeof axleLocal == 'undefined' || axleLocal == null) {
		axleLocal = new this.engine.instance.Vec3();
	}
	this.axleLocal = axleLocal;

	if(typeof axleWorld == 'undefined' || axleWorld == null) {
		axleWorld = new this.engine.instance.Vec3();
	}
	this.axleWorld = axleWorld;

	if(typeof suspensionRestLength == 'undefined' || suspensionRestLength == null) {
		suspensionRestLength = 1;
	}
	this.suspensionRestLength = suspensionRestLength;

	if(typeof suspensionMaxLength == 'undefined' || suspensionMaxLength == null) {
		suspensionMaxLength = 2;
	}
	this.suspensionMaxLength = suspensionMaxLength;

	if(typeof radius == 'undefined' || radius == null) {
		radius = 1;
	}
	this.radius = radius;

	if(typeof suspensionStiffness == 'undefined' || suspensionStiffness == null) {
		suspensionStiffness = 100;
	}
	this.suspensionStiffness = suspensionStiffness;

	if(typeof dampingCompression == 'undefined' || dampingCompression == null) {
		dampingCompression = 10;
	}
	this.dampingCompression = dampingCompression;

	if(typeof dampingRelaxation == 'undefined' || dampingRelaxation == null) {
		dampingRelaxation = 10;
	}
	this.dampingRelaxation = dampingRelaxation;

	if(typeof frictionSlip == 'undefined' || frictionSlip == null) {
		frictionSlip = 10000;
	}
	this.frictionSlip = frictionSlip;

	if(typeof steering == 'undefined' || steering == null) {
		steering = 0;
	}
	this.steering = steering;

	if(typeof rotation == 'undefined' || rotation == null) {
		rotation = 0;
	}
	this.rotation = rotation;

	if(typeof deltaRotation == 'undefined' || deltaRotation == null) {
		deltaRotation = 0;
	}
	this.deltaRotation = deltaRotation;

	if(typeof rollInfluence == 'undefined' || rollInfluence == null) {
		rollInfluence = 0.01;
	}
	this.rollInfluence = rollInfluence;

	if(typeof maxSuspensionForce == 'undefined' || maxSuspensionForce == null) {
		maxSuspensionForce = Number.MAX_VALUE;
	}
	this.maxSuspensionForce = maxSuspensionForce;

	if(typeof clippedInvContactDotSuspension == 'undefined' || clippedInvContactDotSuspension == null) {
		clippedInvContactDotSuspension = 1;
	}
	this.clippedInvContactDotSuspension = clippedInvContactDotSuspension;

	if(typeof suspensionRelativeVelocity == 'undefined' || suspensionRelativeVelocity == null) {
		suspensionRelativeVelocity = 0;
	}
	this.suspensionRelativeVelocity = suspensionRelativeVelocity;

	if(typeof suspensionForce == 'undefined' || suspensionForce == null) {
		suspensionForce = 0;
	}
	this.suspensionForce = suspensionForce;

	if(typeof skidInfo == 'undefined' || skidInfo == null) {
		skidInfo = 0;
	}
	this.skidInfo = skidInfo;

	if(typeof suspensionLength == 'undefined' || suspensionLength == null) {
		suspensionLength = 0;
	}
	this.suspensionLength = suspensionLength;

	if(typeof maxSuspensionTravel == 'undefined' || maxSuspensionTravel == null) {
		maxSuspensionTravel = 1;
	}
	this.maxSuspensionTravel = maxSuspensionTravel;

	if(typeof useCustomSlidingRotationalSpeed == 'undefined' || useCustomSlidingRotationalSpeed == null) {
		useCustomSlidingRotationalSpeed = false;
	}
	this.useCustomSlidingRotationalSpeed = useCustomSlidingRotationalSpeed;

	if(typeof customSlidingRotationalSpeed == 'undefined' || customSlidingRotationalSpeed == null) {
		customSlidingRotationalSpeed = -0.1;
	}
	this.customSlidingRotationalSpeed = customSlidingRotationalSpeed;

    this.instance = this.createInstance();

	// this gets assigned at runtime, when the wheel gets added to a vehicle
	this.wheelIndex = -1;
};

R3.D3.RaycastWheel.prototype.createInstance = function() {
    return {
        chassisConnectionPointLocal : this.chassisConnectionPointLocal,
		chassisConnectionPointWorld : this.chassisConnectionPointWorld,
		directionLocal : this.directionLocal,
		directionWorld : this.directionWorld,
		axleLocal : this.axleLocal,
		axleWorld : this.axleWorld,
		suspensionRestLength : this.suspensionRestLength,
		suspensionMaxLength : this.suspensionMaxLength,
		radius : this.radius,
		suspensionStiffness : this.suspensionStiffness,
		dampingCompression : this.dampingCompression,
		dampingRelaxation : this.dampingRelaxation,
		frictionSlip : this.frictionSlip,
		steering : this.steering,
		rotation : this.rotation,
		deltaRotation : this.deltaRotation,
		rollInfluence : this.rollInfluence,
		maxSuspensionForce : this.maxSuspensionForce,
		clippedInvContactDotSuspension : this.clippedInvContactDotSuspension,
		suspensionRelativeVelocity : this.suspensionRelativeVelocity,
		suspensionForce : this.suspensionForce,
		skidInfo : this.skidInfo,
		suspensionLength : this.suspensionLength,
		maxSuspensionTravel : this.maxSuspensionTravel,
		useCustomSlidingRotationalSpeed : this.useCustomSlidingRotationalSpeed,
		customSlidingRotationalSpeed : this.customSlidingRotationalSpeed
    };

};