/// <summary>
/// Creates a the road between 2 intersections
/// </summary>
/// <param name="source">Source intersection</param>
/// <param name="target">Target intersection</param>
/// <param name="numInLanes">Numlanes along negative orientation</param>
/// <param name="numOutLanes">Numlanes along positive orientation</param>
/// <param name="speedLimit">Speed limit</param>
public Road(
ref FourWayIntersection source, ref FourWayIntersection target,
int numInLanes, int numOutLanes,
float speedLimit)
{
this.SpeedLimit = speedLimit;
SourceIntersection = source;
TargetIntersection = target;
this.NumInLanes = numInLanes;
this.NumOutLanes = numOutLanes;
InLanes = InitLanes(numInLanes, SourceIntersection);
OutLanes = InitLanes(numOutLanes, TargetIntersection);
SourceIntersection.AddRoad(this);
TargetIntersection.AddRoad(this);
}
/// <summary>
/// Initialize lanes heading the same direction, supply neighbor information, and target intersection info
/// </summary>
/// <param name="numLanes">Number of lanes</param>
/// <param name="laneTargetIntersection">Target intersection</param>
/// <returns></returns>
private Lane[] InitLanes(int numLanes, FourWayIntersection laneTargetIntersection)
{
// Create the lanes
Lane[] lanes = new Lane[numLanes];
for (int i = 0; i < numLanes; i++)
{
lanes[i] = new Lane(i, SpeedLimit, laneTargetIntersection);
}
// Setup lane neighbors
for (int i = 0; i < numLanes; i++)
{
// Get lane neighbors
Lane[] neighboringLanes;
if (0 < i && i < numLanes - 1)
{
neighboringLanes = new Lane[] {
lanes[i - 1],
lanes[i + 1]
};
}
else if (numLanes > 1)
{
neighboringLanes = new Lane[] {
i == 0 ? lanes[i + 1] : lanes[i - 1]
};
}
else
{
// no neighboring lanes -> empty array
neighboringLanes = new Lane[0];
}
lanes[i].NeighboringLanes = neighboringLanes;
}
return(lanes);
}
