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Add more granular system sets for state transition schedule ordering #13763

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merged 8 commits into from
Jun 10, 2024
Merged

Add more granular system sets for state transition schedule ordering #13763

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f51b861
use system sets for ordering
MiniaczQ Jun 9, 2024
b5cfb7c
fix fmt
MiniaczQ Jun 9, 2024
5e46a3e
test not going well
MiniaczQ Jun 9, 2024
8a93662
Apply suggestions from code review
MiniaczQ Jun 9, 2024
208421a
fixes
MiniaczQ Jun 9, 2024
34a8f70
fix clippy
MiniaczQ Jun 9, 2024
ad188aa
fix nits
MiniaczQ Jun 9, 2024
8b670a6
fix same state test
MiniaczQ Jun 9, 2024
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5 changes: 3 additions & 2 deletions crates/bevy_state/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,8 +47,9 @@ pub mod prelude {
pub use crate::condition::*;
#[doc(hidden)]
pub use crate::state::{
last_transition, ComputedStates, NextState, OnEnter, OnExit, OnTransition, State, StateSet,
StateTransition, StateTransitionEvent, StateTransitionSteps, States, SubStates,
last_transition, ComputedStates, EnterSchedules, ExitSchedules, NextState, OnEnter, OnExit,
OnTransition, State, StateSet, StateTransition, StateTransitionEvent, States, SubStates,
TransitionSchedules,
};
#[doc(hidden)]
pub use crate::state_scoped::StateScoped;
Expand Down
26 changes: 16 additions & 10 deletions crates/bevy_state/src/state/freely_mutable_state.rs
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Expand Up @@ -17,27 +17,33 @@ use super::{take_next_state, transitions::*};
pub trait FreelyMutableState: States {
/// This function registers all the necessary systems to apply state changes and run transition schedules
fn register_state(schedule: &mut Schedule) {
schedule.configure_sets((
ApplyStateTransition::<Self>::default()
.in_set(StateTransitionSteps::DependentTransitions),
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ExitSchedules::<Self>::default().in_set(StateTransitionSteps::ExitSchedules),
TransitionSchedules::<Self>::default()
.in_set(StateTransitionSteps::TransitionSchedules),
EnterSchedules::<Self>::default().in_set(StateTransitionSteps::EnterSchedules),
));

schedule
.add_systems(
apply_state_transition::<Self>.in_set(ApplyStateTransition::<Self>::apply()),
)
.add_systems(
last_transition::<Self>
.pipe(run_enter::<Self>)
.in_set(StateTransitionSteps::EnterSchedules),
apply_state_transition::<Self>.in_set(ApplyStateTransition::<Self>::default()),
)
.add_systems(
last_transition::<Self>
.pipe(run_exit::<Self>)
.in_set(StateTransitionSteps::ExitSchedules),
.in_set(ExitSchedules::<Self>::default()),
)
.add_systems(
last_transition::<Self>
.pipe(run_transition::<Self>)
.in_set(StateTransitionSteps::TransitionSchedules),
.in_set(TransitionSchedules::<Self>::default()),
)
.configure_sets(
ApplyStateTransition::<Self>::apply().in_set(StateTransitionSteps::RootTransitions),
.add_systems(
last_transition::<Self>
.pipe(run_enter::<Self>)
.in_set(EnterSchedules::<Self>::default()),
);
}
}
Expand Down
114 changes: 114 additions & 0 deletions crates/bevy_state/src/state/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -619,4 +619,118 @@ mod tests {
1
);
}

#[derive(Resource, Default, Debug)]
struct TransitionTracker(Vec<&'static str>);

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#[derive(PartialEq, Eq, Debug, Hash, Clone)]
enum TransitionTestingComputedState {
IsA,
IsBAndEven,
IsBAndOdd,
}

impl ComputedStates for TransitionTestingComputedState {
type SourceStates = (Option<SimpleState>, Option<SubState>);

fn compute(sources: (Option<SimpleState>, Option<SubState>)) -> Option<Self> {
match sources {
(Some(simple), sub) => {
if simple == SimpleState::A {
Some(Self::IsA)
} else if sub == Some(SubState::One) {
Some(Self::IsBAndOdd)
} else if sub == Some(SubState::Two) {
Some(Self::IsBAndEven)
} else {
None
}
}
_ => None,
}
}
}

#[test]
fn check_transition_orders() {
let mut world = World::new();
setup_state_transitions_in_world(&mut world, None);
EventRegistry::register_event::<StateTransitionEvent<SimpleState>>(&mut world);
EventRegistry::register_event::<StateTransitionEvent<SubState>>(&mut world);
EventRegistry::register_event::<StateTransitionEvent<TransitionTestingComputedState>>(
&mut world,
);
world.insert_resource(State(SimpleState::B(true)));
world.init_resource::<State<SubState>>();
world.insert_resource(State(TransitionTestingComputedState::IsA));
let mut schedules = world.remove_resource::<Schedules>().unwrap();
let apply_changes = schedules.get_mut(StateTransition).unwrap();
SimpleState::register_state(apply_changes);
SubState::register_sub_state_systems(apply_changes);
TransitionTestingComputedState::register_computed_state_systems(apply_changes);

world.init_resource::<TransitionTracker>();
fn register_transition(string: &'static str) -> impl Fn(ResMut<TransitionTracker>) {
move |mut transitions: ResMut<TransitionTracker>| transitions.0.push(string)
}

schedules.add_systems(
StateTransition,
register_transition("simple exit").in_set(ExitSchedules::<SimpleState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("simple transition")
.in_set(TransitionSchedules::<SimpleState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("simple enter").in_set(EnterSchedules::<SimpleState>::default()),
);

schedules.add_systems(
StateTransition,
register_transition("sub exit").in_set(ExitSchedules::<SubState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("sub transition")
.in_set(TransitionSchedules::<SubState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("sub enter").in_set(EnterSchedules::<SubState>::default()),
);

schedules.add_systems(
StateTransition,
register_transition("computed exit")
.in_set(ExitSchedules::<TransitionTestingComputedState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("computed transition")
.in_set(TransitionSchedules::<TransitionTestingComputedState>::default()),
);
schedules.add_systems(
StateTransition,
register_transition("computed enter")
.in_set(EnterSchedules::<TransitionTestingComputedState>::default()),
);

world.insert_resource(schedules);

world.run_schedule(StateTransition);

let transitions = &world.resource::<TransitionTracker>().0;

assert_eq!(transitions.len(), 9);
assert_eq!(transitions[0], "computed exit");
assert_eq!(transitions[1], "sub exit");
assert_eq!(transitions[2], "simple exit");
// Transition order is arbitrary and doesn't need testing.
assert_eq!(transitions[6], "simple enter");
assert_eq!(transitions[7], "sub enter");
assert_eq!(transitions[8], "computed enter");
}
}
121 changes: 78 additions & 43 deletions crates/bevy_state/src/state/state_set.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,8 @@ use self::sealed::StateSetSealed;
use super::{
computed_states::ComputedStates, internal_apply_state_transition, last_transition, run_enter,
run_exit, run_transition, sub_states::SubStates, take_next_state, ApplyStateTransition,
NextState, State, StateTransitionEvent, StateTransitionSteps, States,
EnterSchedules, ExitSchedules, NextState, State, StateTransitionEvent, StateTransitionSteps,
States, TransitionSchedules,
};

mod sealed {
Expand Down Expand Up @@ -114,27 +115,35 @@ impl<S: InnerStateSet> StateSet for S {
internal_apply_state_transition(event, commands, current_state, new_state);
};

schedule.configure_sets((
ApplyStateTransition::<T>::default()
.in_set(StateTransitionSteps::DependentTransitions)
.after(ApplyStateTransition::<S::RawState>::default()),
ExitSchedules::<T>::default()
.in_set(StateTransitionSteps::ExitSchedules)
.before(ExitSchedules::<S::RawState>::default()),
TransitionSchedules::<T>::default().in_set(StateTransitionSteps::TransitionSchedules),
EnterSchedules::<T>::default()
.in_set(StateTransitionSteps::EnterSchedules)
.after(EnterSchedules::<S::RawState>::default()),
));

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::apply()))
.add_systems(
last_transition::<T>
.pipe(run_enter::<T>)
.in_set(StateTransitionSteps::EnterSchedules),
)
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::default()))
.add_systems(
last_transition::<T>
.pipe(run_exit::<T>)
.in_set(StateTransitionSteps::ExitSchedules),
.in_set(ExitSchedules::<T>::default()),
)
.add_systems(
last_transition::<T>
.pipe(run_transition::<T>)
.in_set(StateTransitionSteps::TransitionSchedules),
.in_set(TransitionSchedules::<T>::default()),
)
.configure_sets(
ApplyStateTransition::<T>::apply()
.in_set(StateTransitionSteps::DependentTransitions)
.after(ApplyStateTransition::<S::RawState>::apply()),
.add_systems(
last_transition::<T>
.pipe(run_enter::<T>)
.in_set(EnterSchedules::<T>::default()),
);
}

Expand Down Expand Up @@ -186,27 +195,35 @@ impl<S: InnerStateSet> StateSet for S {
internal_apply_state_transition(event, commands, current_state_res, new_state);
};

schedule.configure_sets((
ApplyStateTransition::<T>::default()
.in_set(StateTransitionSteps::DependentTransitions)
.after(ApplyStateTransition::<S::RawState>::default()),
ExitSchedules::<T>::default()
.in_set(StateTransitionSteps::ExitSchedules)
.before(ExitSchedules::<S::RawState>::default()),
TransitionSchedules::<T>::default().in_set(StateTransitionSteps::TransitionSchedules),
EnterSchedules::<T>::default()
.in_set(StateTransitionSteps::EnterSchedules)
.after(EnterSchedules::<S::RawState>::default()),
));

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::apply()))
.add_systems(
last_transition::<T>
.pipe(run_enter::<T>)
.in_set(StateTransitionSteps::EnterSchedules),
)
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::default()))
.add_systems(
last_transition::<T>
.pipe(run_exit::<T>)
.in_set(StateTransitionSteps::ExitSchedules),
.in_set(ExitSchedules::<T>::default()),
)
.add_systems(
last_transition::<T>
.pipe(run_transition::<T>)
.in_set(StateTransitionSteps::TransitionSchedules),
.in_set(TransitionSchedules::<T>::default()),
)
.configure_sets(
ApplyStateTransition::<T>::apply()
.in_set(StateTransitionSteps::DependentTransitions)
.after(ApplyStateTransition::<S::RawState>::apply()),
.add_systems(
last_transition::<T>
.pipe(run_enter::<T>)
.in_set(EnterSchedules::<T>::default()),
);
}
}
Expand Down Expand Up @@ -243,16 +260,25 @@ macro_rules! impl_state_set_sealed_tuples {
internal_apply_state_transition(event, commands, current_state, new_state);
};

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::apply()))
.add_systems(last_transition::<T>.pipe(run_enter::<T>).in_set(StateTransitionSteps::EnterSchedules))
.add_systems(last_transition::<T>.pipe(run_exit::<T>).in_set(StateTransitionSteps::ExitSchedules))
.add_systems(last_transition::<T>.pipe(run_transition::<T>).in_set(StateTransitionSteps::TransitionSchedules))
.configure_sets(
ApplyStateTransition::<T>::apply()
schedule.configure_sets((
ApplyStateTransition::<T>::default()
.in_set(StateTransitionSteps::DependentTransitions)
$(.after(ApplyStateTransition::<$param::RawState>::apply()))*
);
$(.after(ApplyStateTransition::<$param::RawState>::default()))*,
ExitSchedules::<T>::default()
.in_set(StateTransitionSteps::ExitSchedules)
$(.before(ExitSchedules::<$param::RawState>::default()))*,
TransitionSchedules::<T>::default()
.in_set(StateTransitionSteps::TransitionSchedules),
EnterSchedules::<T>::default()
.in_set(StateTransitionSteps::EnterSchedules)
$(.after(EnterSchedules::<$param::RawState>::default()))*,
));

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_exit::<T>).in_set(ExitSchedules::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_transition::<T>).in_set(TransitionSchedules::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_enter::<T>).in_set(EnterSchedules::<T>::default()));
}

fn register_sub_state_systems_in_schedule<T: SubStates<SourceStates = Self>>(
Expand Down Expand Up @@ -288,16 +314,25 @@ macro_rules! impl_state_set_sealed_tuples {
internal_apply_state_transition(event, commands, current_state_res, new_state);
};

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::apply()))
.add_systems(last_transition::<T>.pipe(run_enter::<T>).in_set(StateTransitionSteps::EnterSchedules))
.add_systems(last_transition::<T>.pipe(run_exit::<T>).in_set(StateTransitionSteps::ExitSchedules))
.add_systems(last_transition::<T>.pipe(run_transition::<T>).in_set(StateTransitionSteps::TransitionSchedules))
.configure_sets(
ApplyStateTransition::<T>::apply()
schedule.configure_sets((
ApplyStateTransition::<T>::default()
.in_set(StateTransitionSteps::DependentTransitions)
$(.after(ApplyStateTransition::<$param::RawState>::apply()))*
);
$(.after(ApplyStateTransition::<$param::RawState>::default()))*,
ExitSchedules::<T>::default()
.in_set(StateTransitionSteps::ExitSchedules)
$(.before(ExitSchedules::<$param::RawState>::default()))*,
TransitionSchedules::<T>::default()
.in_set(StateTransitionSteps::TransitionSchedules),
EnterSchedules::<T>::default()
.in_set(StateTransitionSteps::EnterSchedules)
$(.after(EnterSchedules::<$param::RawState>::default()))*,
));

schedule
.add_systems(apply_state_transition.in_set(ApplyStateTransition::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_exit::<T>).in_set(ExitSchedules::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_transition::<T>).in_set(TransitionSchedules::<T>::default()))
.add_systems(last_transition::<T>.pipe(run_enter::<T>).in_set(EnterSchedules::<T>::default()));
}
}
};
Expand Down
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