private XState GetState(txStateID state_id)
{
XState state;
bool found = mStates.TryGetValue(state_id, out state);
XUtils.Assert(found);
return(state);
}
public void RemoveTransition(txStateID from, Trigger trigger)
{
XUtils.Assert(!mLocked, "Modifying state machine while in use not allowed.");
XState from_state;
bool found_from = mStates.TryGetValue(from, out from_state);
XUtils.Assert(found_from);
from_state.Remove(trigger);
}
// TODO: templatize this to improve what is passed in for trigger, cast it to int
public void CreateTransition(txStateID from, txStateID to, Trigger trigger, TransitionCallback callback)
{
XUtils.Assert(!mLocked, "Modifying state machine while in use not allowed.");
// make sure 'from' already exists
// make sure 'from' state doesn't already have that trigger (Add() will do that)
XState from_state, to_state;
bool found_from = mStates.TryGetValue(from, out from_state);
bool found_to = mStates.TryGetValue(to, out to_state);
XUtils.Assert(found_from && found_to);
from_state.Add(trigger, to_state, callback);
}
public void RemoveTransitionsTo(txStateID state_id)
{
List <Trigger> removals = new List <Trigger>();
for (int i = 0; i < mTransitions.Count; ++i)
{
var transition_i = mTransitions.ElementAt(i);
if (transition_i.Value.GetToStateID().Equals(state_id))
{
removals.Add(transition_i.Key);
}
}
foreach (Trigger removal in removals)
{
mTransitions.Remove(removal);
}
}
public void RemoveState(txStateID state_id, txStateID new_state_if_current)
{
XUtils.Assert(!mLocked, "Modifying state machine while in use not allowed.");
// if that was the current state, prepare to switch states as indicated.
// remove all transitions to that state from other states.
// remove state.
XState next_state = null;
if (mCurrentState.mStateID.Equals(state_id))
{
XUtils.Assert(!new_state_if_current.Equals(state_id));
if (new_state_if_current.Equals(txStateID.kNone))
{
XUtils.Assert(mStates.Count == 1, "can only switch to no current state if removing the last state");
mCurrentState = null;
}
else
{
bool found_next = mStates.TryGetValue(new_state_if_current, out next_state);
XUtils.Assert(found_next);
}
}
for (int i = 0; i < mStates.Count; ++i)
{
var state_i = mStates.ElementAt(i);
state_i.Value.RemoveTransitionsTo(state_id);
}
if (next_state != null)
{
mCurrentState = next_state;
}
XState state;
bool found = mStates.TryGetValue(state_id, out state);
XUtils.Assert(found);
mStates.Remove(state_id);
}
public void Init()
{
mCurrentGameTime = new GameTime();
mContactCount = eContactCount.Unknown;
mMultiPoke_StartMaxSeparation = 0d;
mMultiPoke_StartMaxSeparation = 0d;
mStateMachine = new XStateMachine <eContactChange>(eContactChange.NoChange);
txStateID start = mStateMachine.CreateState(State_Start);
txStateID no_contacts = mStateMachine.CreateState(State_NoContacts);
txStateID tracking_single_poke = mStateMachine.CreateState(State_SinglePoke);
txStateID tracking_single_drag = mStateMachine.CreateState(State_SingleDrag);
txStateID tracking_multi_poke = mStateMachine.CreateState(State_MultiPoke);
txStateID tracking_multi_drag = mStateMachine.CreateState(State_MultiDrag);
txStateID ignoring_contacts = mStateMachine.CreateState(State_IgnoringContacts);
txStateID tracking_4_contacts = mStateMachine.CreateState(State_4Contacts);
txStateID tracking_5_contacts = mStateMachine.CreateState(State_5Contacts);
mStateMachine.CreateTransition(no_contacts, tracking_single_poke, eContactChange.ZeroToOne, Transition_NoContacts_SinglePoke);
mStateMachine.CreateTransition(no_contacts, tracking_multi_poke, eContactChange.ZeroToTwo, Transition_NoContacts_MultiPoke);
mStateMachine.CreateTransition(no_contacts, ignoring_contacts, eContactChange.ZeroToMany, Transition_Trivial);
mStateMachine.CreateTransition(no_contacts, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(no_contacts, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_poke, tracking_single_drag, eContactChange.StillToMoving, Transition_SinglePoke_SingleDrag);
mStateMachine.CreateTransition(tracking_single_poke, no_contacts, eContactChange.OneToZero, Transition_SinglePoke_NoContacts);
mStateMachine.CreateTransition(tracking_single_poke, tracking_multi_poke, eContactChange.OneToTwo, Transition_SinglePoke_MultiPoke);
mStateMachine.CreateTransition(tracking_single_poke, ignoring_contacts, eContactChange.OneToMany, Transition_SinglePoke_IgnoringContacts);
mStateMachine.CreateTransition(tracking_single_poke, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_poke, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_drag, tracking_multi_drag, eContactChange.SingleDragToMultiDrag, Transition_SingleDrag_MultiDrag);
mStateMachine.CreateTransition(tracking_single_drag, no_contacts, eContactChange.OneToZero, Transition_SingleDrag_NoContacts);
mStateMachine.CreateTransition(tracking_single_drag, ignoring_contacts, eContactChange.OneToMany, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_drag, ignoring_contacts, eContactChange.SingleDragToMultiDragTooSlow, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_drag, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(tracking_single_drag, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_poke, no_contacts, eContactChange.TwoToZero, Transition_MultiPoke_NoContacts);
mStateMachine.CreateTransition(tracking_multi_poke, tracking_multi_drag, eContactChange.StillToMoving, Transition_MultiPoke_MultiDrag);
mStateMachine.CreateTransition(tracking_multi_poke, ignoring_contacts, eContactChange.TwoToOne, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_poke, ignoring_contacts, eContactChange.TwoToMany, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_poke, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_poke, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_drag, no_contacts, eContactChange.TwoToZero, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_drag, ignoring_contacts, eContactChange.TwoToOne, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_drag, ignoring_contacts, eContactChange.TwoToMany, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_drag, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(tracking_multi_drag, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(ignoring_contacts, no_contacts, eContactChange.OneToZero, Transition_Trivial);
mStateMachine.CreateTransition(ignoring_contacts, no_contacts, eContactChange.TwoToZero, Transition_Trivial);
mStateMachine.CreateTransition(ignoring_contacts, no_contacts, eContactChange.ManyToZero, Transition_Trivial);
mStateMachine.CreateTransition(ignoring_contacts, tracking_4_contacts, eContactChange.AnyToFour, Transition_Trivial);
mStateMachine.CreateTransition(ignoring_contacts, tracking_5_contacts, eContactChange.AnyToFive, Transition_Trivial);
mStateMachine.CreateTransition(start, no_contacts, eContactChange.NoInitialContacts, Transition_Trivial);
mStateMachine.CreateTransition(start, ignoring_contacts, eContactChange.InitialContacts, Transition_Trivial);
mStateMachine.CreateTransition(tracking_4_contacts, no_contacts, eContactChange.FourToZero, Transition_4Contacts_Any);
mStateMachine.CreateTransition(tracking_4_contacts, ignoring_contacts, eContactChange.FourToAnyPositive, Transition_4Contacts_Any);
mStateMachine.CreateTransition(tracking_5_contacts, no_contacts, eContactChange.FiveToZero, Transition_5Contacts_Any);
mStateMachine.CreateTransition(tracking_5_contacts, ignoring_contacts, eContactChange.FiveToAnyPositive, Transition_5Contacts_Any);
mStateMachine.SetStartingState(start);
}
public void SetStartingState(txStateID starting_state)
{
XUtils.Assert(mCurrentState == null);
XUtils.Assert(!starting_state.Equals(txStateID.kNone));
mCurrentState = GetState(starting_state);
}
public static void UnitTest()
{
GameTime t = new GameTime();
sUnitTest = new XStateMachineUnitTest();
var sm = new XStateMachine <eTriggers>(eTriggers.None);
//sm.Log( "empty" );
txStateID s1 = sm.CreateState(null);
sm.SetStartingState(s1);
sm.Update(eTriggers.None);
sm.CreateTransition(s1, s1, eTriggers.Jump, sUnitTest.Cb1);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
sm.CreateTransition(s1, s1, eTriggers.Poke, sUnitTest.Cb2);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
//Console.WriteLine( "test removal" );
sm.RemoveTransition(s1, eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
// sm.RemoveTransition( s1, eTriggers.Jump ); // correctly asserts missing trigger
sm.RemoveTransition(s1, eTriggers.Poke);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
sm.RemoveState(s1, txStateID.kNone);
sm.Update(eTriggers.None);
sm.ProcessTrigger(eTriggers.Poke);
// sm.SetStartingState( txStateID.kNone ); // correctly asserts illegal starting state
// sm.CreateTransition( s1, txStateID.kNone, sUnitTest.Cb2, eTriggers.Jump ); // asserts correctly s1 not found
// sm.CreateTransition( txStateID.kNone, txStateID.kNone, sUnitTest.Cb2, eTriggers.Jump ); // asserts correctly kNone not found
//Console.WriteLine( "testing non trivial transitions and static callbacks" );
txStateID s2 = sm.CreateState(Cb3);
txStateID s3 = sm.CreateState(sUnitTest.Cb2State);
sm.SetStartingState(s2);
sm.CreateTransition(s2, s3, eTriggers.Jump, sUnitTest.Cb1);
sm.CreateTransition(s3, s2, eTriggers.Poke, sUnitTest.Cb1);
sm.Update(eTriggers.None);
sm.ProcessTrigger(eTriggers.Jump);
sm.Update(eTriggers.None);
sm.ProcessTrigger(eTriggers.Poke);
sm.Update(eTriggers.None);
sm.ProcessTrigger(eTriggers.Jump);
sm.ProcessTrigger(eTriggers.Poke);
sm.Update(eTriggers.None);
//sm.Log();
//Console.WriteLine( "testing non trivial remove state" );
// sm.RemoveState( s2, s2 ); // correctly asserts can't name same state
sm.RemoveState(s2, s3);
//sm.Log();
//Console.WriteLine( "testing non trivial remove state, not the current" );
txStateID s4 = sm.CreateState(sUnitTest.Cb2State);
sm.CreateTransition(s3, s4, eTriggers.Poke, sUnitTest.Cb1);
sm.CreateTransition(s4, s3, eTriggers.Poke, sUnitTest.Cb1);
//sm.Log();
sm.RemoveState(s4, s3);
//sm.Log();
}