/// <summary>
/// Sets the intersection to a new state. (sets appropriate waypoint labels and changes lights).
/// </summary>
/// <param name="newState">Parameter which sets this intersection either to the new state.</param>
private void switchState(int newState)
{
PointDescriptor point1Descriptor = transform.Find("semaphore1").Find("point1").GetComponent <PointDescriptor>();
PointDescriptor point2Descriptor = transform.Find("semaphore2").Find("point2").GetComponent <PointDescriptor>();
PointDescriptor point3Descriptor = transform.Find("semaphore3").Find("point3").GetComponent <PointDescriptor>();
PointDescriptor point4Descriptor = transform.Find("semaphore4").Find("point4").GetComponent <PointDescriptor>();
switch (newState)
{
case VERTICAL:
case VERTICAL_TO_HORIZONTAL:
point1Descriptor.setLabel(POINT_STATE1);
point2Descriptor.setLabel(POINT_STATE2);
point3Descriptor.setLabel(POINT_STATE2);
point4Descriptor.setLabel(POINT_STATE1);
break;
case HORIZONTAL:
case HORIZONTAL_TO_VERTICAL:
point1Descriptor.setLabel(POINT_STATE1);
point2Descriptor.setLabel(POINT_STATE1);
point3Descriptor.setLabel(POINT_STATE2);
point4Descriptor.setLabel(POINT_STATE2);
break;
}
currentState = newState;
changeLights(currentState);
manageDecelerationPoints(currentState);
}
/// <summary>
/// Changes label states of points whose name begins with "carDecelerate". This allows the cars
/// to move when the light is green and orders them to stop when it is red.
/// </summary>
/// <param name="newState">New intersection state</param>
private void manageDecelerationPoints(int newState)
{
PointDescriptor carDecelerate1Descriptor = transform.Find("semaphore1").Find("carDecelerate1").GetComponent <PointDescriptor>();
PointDescriptor carDecelerate2Descriptor = transform.Find("semaphore2").Find("carDecelerate2").GetComponent <PointDescriptor>();
PointDescriptor carDecelerate3Descriptor = transform.Find("semaphore3").Find("carDecelerate3").GetComponent <PointDescriptor>();
PointDescriptor carDecelerate4Descriptor = transform.Find("semaphore4").Find("carDecelerate4").GetComponent <PointDescriptor>();
switch (newState)
{
case VERTICAL:
carDecelerate1Descriptor.setLabel(POINT_STATE1);
carDecelerate2Descriptor.setLabel(POINT_STATE2);
carDecelerate3Descriptor.setLabel(POINT_STATE1);
carDecelerate4Descriptor.setLabel(POINT_STATE2);
break;
case HORIZONTAL:
carDecelerate1Descriptor.setLabel(POINT_STATE2);
carDecelerate2Descriptor.setLabel(POINT_STATE1);
carDecelerate3Descriptor.setLabel(POINT_STATE2);
carDecelerate4Descriptor.setLabel(POINT_STATE1);
break;
default:
carDecelerate1Descriptor.setLabel(POINT_STATE2);
carDecelerate2Descriptor.setLabel(POINT_STATE2);
carDecelerate3Descriptor.setLabel(POINT_STATE2);
carDecelerate4Descriptor.setLabel(POINT_STATE2);
break;
}
}
/// <summary>
/// Sets labels of auxiliary waypoints to 1. This means that the cars can reach them only if the
/// traffic light is green.
/// </summary>
private void manageAuxiliaryPoints()
{
PointDescriptor carExit1Point = transform.Find("AuxiliaryWaypoints").Find("carExit1").GetComponent <PointDescriptor>();
PointDescriptor carExit2Point = transform.Find("AuxiliaryWaypoints").Find("carExit2").GetComponent <PointDescriptor>();
PointDescriptor carExit4Point = transform.Find("AuxiliaryWaypoints").Find("carExit4").GetComponent <PointDescriptor>();
PointDescriptor carRight1Point = transform.Find("semaphore1").Find("carRight1").GetComponent <PointDescriptor>();
PointDescriptor carRight2Point = transform.Find("semaphore2").Find("carRight2").GetComponent <PointDescriptor>();
carExit1Point.setLabel(POINT_STATE1);
carExit2Point.setLabel(POINT_STATE1);
carExit4Point.setLabel(POINT_STATE1);
carRight1Point.setLabel(POINT_STATE1);
carRight2Point.setLabel(POINT_STATE1);
}