IEnumerator Start()
{
// Set up the decision tree
Decision isEnemy = new DecisionIsEnemy(this);
Decision isAirplane = new DecisionIsAirplane(this);
Decision isDistanceLessThan = new DecisionIsDistanceLessThan(this, 30);
// To do : Create an isVehicle object
DecisionIsVehicle isVehicle = new DecisionIsVehicle(this);
Action fireMissile = new ActionFireMissile(this);
// To do : Create a laser-firing-action object.
Action fireLaser = new ActionFireLaser(this);
// To do : Create a cannon-firing-action object.
Action fireCannon = new ActionFireCannon(this);
Decision decisionTree = isEnemy;
isEnemy.trueNode = isDistanceLessThan;
isEnemy.falseNode = null;
isDistanceLessThan.trueNode = isAirplane;
isDistanceLessThan.falseNode = null;
isAirplane.trueNode = fireMissile;
// To do : Connect the falseNode of isAirplane to isVehicle
isAirplane.falseNode = isVehicle;
// To do : Set the child nodes with proper actions
isVehicle.trueNode = fireCannon;
isVehicle.falseNode = fireLaser;
yield return(null);
while (true) // main loop
{
DoRadarScan(); // Scan a new unit or update the scanned unit
// Get an action from the decision tree
Action action = decisionTree.MakeDecision() as Action;
if (action != null)
{
if (action.Perform()) // action performed
{
yield return(new WaitForSeconds(3)); // wait for 3 sec
scannedUnit = null;
}
}
if (scannedUnit != null && scannedUnit.distance < 0)
{
actionDisplay = "No action";
yield return(new WaitForSeconds(3)); // wait for 3 sec
scannedUnit = null;
}
yield return(null);
}
}
void DoRadarScan()
{
if (scannedUnit == null)
{
actionDisplay = "";
scannedUnit = new ScannedUnit();
}
scannedUnit.Update(); // Update its distance
}
