}//end HasGreen property
/* drive function
* pulls a car out of the waiting queue, queries it for next direction, then sends it down the road */
public bool drive()
{
if (this.waitingVehicles.Empty())
{
return(false);
}
Vehicle v = waitingVehicles.pop();
int d = v.getDirection((int)this.dir);
/* handle preemptive light switching for ambulances */
if (v.GetType().ToString() == "Ambulance")
{//clear future intersections and reset current intesection
Ambulance a = (Ambulance)v;
for (int i = 0; i < Simulation.NUM_PREEMPTIVE_GREENS; i++)
{
if (a.pathDirs.Count > i)
{
to.outgoing[a.getFuturePath(i)].resetLights();
}
}
}//end if vehicle is an ambulance
/* drive the car through */
if (0 <= d && d < 4) //ambulances will return -1 if they are done
{
Road r = this.to.outgoing[d]; //get the road to drive onto
Simulation.futureEvents.Add(new EndOfRoadEvent(Simulation.time + r.length, r, v)); //send it down that road
this.to.block(Simulation.CLEARING_TIME); //block the intersection briefly
return(true);
}
return(false);
}
