public override bool Evaluate()
{
//this method is called to do a potential state transition
foreach (FiniteStateMachineTransition t in currentNode.Transitions)
{
//if the condition is satisfied, we move to that transitions end node
if (t.Evaluate())
{
currentNode = t.End;
break;
}
}
//then execute the action at the current node
try
{
currentNode.Execute();
}
catch
{
return(false);
}
return(true);
}
public FiniteStateMachineTransition(string name, FiniteStateMachineNode start, FiniteStateMachineNode end, Func <bool> condition, int priority)
{
this.name = name;
this.start = start;
this.end = end;
this.condition = condition;
this.priority = priority;
}
private void SetFiniteStateMachine()
{
FiniteStateMachineNode wander = new FiniteStateMachineNode("wander", SetWander);
FiniteStateMachineNode turnAround = new FiniteStateMachineNode("turn around", SetTurnAround);
FiniteStateMachineNode runAway = new FiniteStateMachineNode("run away", SetRunAway);
FiniteStateMachineNode stayPut = new FiniteStateMachineNode("stay put", SetStayPut);
wander.AddTransition("Player in line of sight", PlayerInLineOfSight, 2, runAway);
wander.AddTransition("At Dead End", AtDeadEnd, 1, turnAround);
runAway.AddTransition("Player not in line of sight", PlayerNotInLineOfSight, 1, wander);
turnAround.AddTransition("Not at dead end", NotAtDeadEnd, 1, wander);
turnAround.AddTransition("Player in line of sight", PlayerInLineOfSight, 2, stayPut);
stayPut.AddTransition("Player not in line of sight", PlayerNotInLineOfSight, 1, wander);
finiteStateMachine = new FiniteStateMachine(wander);
}
public FiniteStateMachine(FiniteStateMachineNode start_node)
{
currentNode = start_node;
}
public void AddTransition(string name, Func <bool> condition, int priority, FiniteStateMachineNode end)
{
transitions.Add(new FiniteStateMachineTransition(name, this, end, condition, priority));
SortTransitions();
}