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);
}
// state/transition helper functions
private eContactChange UpdateTouchCount()
{
int num_touches = mTouches.Count();
eContactCount prev_contact_count = mContactCount;
eContactChange count_change = eContactChange.NoChange;
eContactCount new_count = num_touches == 5 ? eContactCount.Five :
num_touches == 4 ? eContactCount.Four :
num_touches > 2 ? eContactCount.Many :
num_touches > 1 ? eContactCount.Two :
num_touches > 0 ? eContactCount.One :
eContactCount.Zero;
if (prev_contact_count == eContactCount.Zero)
{
count_change = new_count == eContactCount.One ? eContactChange.ZeroToOne :
new_count == eContactCount.Two ? eContactChange.ZeroToTwo :
new_count == eContactCount.Many ? eContactChange.ZeroToMany :
new_count == eContactCount.Four ? eContactChange.AnyToFour :
new_count == eContactCount.Five ? eContactChange.AnyToFive :
eContactChange.NoChange;
}
else if (prev_contact_count == eContactCount.One)
{
count_change = new_count == eContactCount.Zero ? eContactChange.OneToZero :
new_count == eContactCount.Two ? eContactChange.OneToTwo :
new_count == eContactCount.Many ? eContactChange.OneToMany :
new_count == eContactCount.Four ? eContactChange.AnyToFour :
new_count == eContactCount.Five ? eContactChange.AnyToFive :
eContactChange.NoChange;
}
else if (prev_contact_count == eContactCount.Two)
{
count_change = new_count == eContactCount.Zero ? eContactChange.TwoToZero :
new_count == eContactCount.One ? eContactChange.TwoToOne :
new_count == eContactCount.Many ? eContactChange.TwoToMany :
new_count == eContactCount.Four ? eContactChange.AnyToFour :
new_count == eContactCount.Five ? eContactChange.AnyToFive :
eContactChange.NoChange;
}
else if (prev_contact_count == eContactCount.Many)
{
count_change = new_count == eContactCount.Zero ? eContactChange.ManyToZero :
new_count == eContactCount.One ? eContactChange.ManyToOne :
new_count == eContactCount.Two ? eContactChange.ManyToTwo :
new_count == eContactCount.Four ? eContactChange.AnyToFour :
new_count == eContactCount.Five ? eContactChange.AnyToFive :
eContactChange.NoChange;
}
else if (prev_contact_count == eContactCount.Four)
{
count_change = new_count == eContactCount.Four ? eContactChange.NoChange :
new_count == eContactCount.Zero ? eContactChange.FourToZero :
eContactChange.FourToAnyPositive;
}
else if (prev_contact_count == eContactCount.Five)
{
count_change = new_count == eContactCount.Five ? eContactChange.NoChange :
new_count == eContactCount.Zero ? eContactChange.FiveToZero :
eContactChange.FiveToAnyPositive;
}
else if (prev_contact_count == eContactCount.Unknown)
{
count_change = (new_count == eContactCount.Zero) ?
eContactChange.NoInitialContacts :
eContactChange.InitialContacts;
}
else
{
XUtils.Assert(false);
}
mContactCount = new_count;
return(count_change);
}