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// Activate event sending
const USER_DATA: u64 = 54789; // dummy
tween.set_completed_event(USER_DATA);
assert!(tween.event_data.is_some());
assert_eq!(tween.event_data.unwrap(), USER_DATA);
// Loop over 2.2 seconds, so greater than one ping-pong loop
let tick_duration = Duration::from_secs_f32(0.2);
for i in 1..=11 {
// Calculate expected values
let (progress, times_completed, mut direction, expected_state, just_completed) =
match count {
RepeatCount::Finite(1) => {
let progress = (i as f32 * 0.2).min(1.0);
let times_completed = if i >= 5 { 1 } else { 0 };
let state = if i < 5 {
TweenState::Active
} else {
TweenState::Completed
};
let just_completed = i == 5;
(
progress,
times_completed,
TweeningDirection::Forward,
state,
just_completed,
)
}
RepeatCount::Finite(count) => {
let total_progress = i as f32 * 0.2;
let progress = if total_progress >= *count as f32 {
1.
} else {
total_progress.fract()
};
if *strategy == RepeatStrategy::Repeat {
let times_completed = i / 5;
let just_completed = i % 5 == 0;
(
progress,
times_completed,
TweeningDirection::Forward,
if i < 10 {
TweenState::Active
} else {
TweenState::Completed
},
just_completed,
)
} else {
let i5 = i % 5;
let times_completed = i / 5;
// Once Completed, the direction doesn't change
let direction = if i >= 5 {
TweeningDirection::Backward
} else {
TweeningDirection::Forward
};
let just_completed = i5 == 0;
(
progress,
times_completed,
direction,
if i < 10 {
TweenState::Active
} else {
TweenState::Completed
},
just_completed,
)
}
RepeatCount::Infinite => {
let progress = (i as f32 * 0.2).fract();
if *strategy == RepeatStrategy::Repeat {
let times_completed = i / 5;
let just_completed = i % 5 == 0;
(
progress,
times_completed,
TweeningDirection::Forward,
TweenState::Active,
just_completed,
)
let i5 = i % 5;
let times_completed = i / 5;
let i10 = i % 10;
let direction = if i10 >= 5 {
TweeningDirection::Backward
} else {
TweeningDirection::Forward
};
let just_completed = i5 == 0;
(
progress,
times_completed,
direction,
TweenState::Active,
just_completed,
)
}
RepeatCount::For(_) => panic!("Untested"),
};
let factor = if tweening_direction.is_backward() {
direction = !direction;
1. - progress
} else {
progress
};
let expected_translation = if direction.is_forward() {
Vec3::splat(progress)
} else {
Vec3::splat(1. - progress)
};
println!(
"Expected: progress={} factor={} times_completed={} direction={:?} state={:?} just_completed={} translation={:?}",
progress, factor, times_completed, direction, expected_state, just_completed, expected_translation
);
// Tick the tween
let actual_state = {
let mut event_writer = event_writer_system_state.get_mut(&mut world);
tween.tick(tick_duration, &mut transform, entity, &mut event_writer)
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};
// Propagate events
{
let mut events =
world.get_resource_mut::<Events<TweenCompleted>>().unwrap();
events.update();
}
// Check actual values
assert_eq!(tween.direction(), direction);
assert_eq!(actual_state, expected_state);
assert!(abs_diff_eq(tween.progress(), progress, 1e-5));
assert_eq!(tween.times_completed(), times_completed);
assert!(transform
.translation
.abs_diff_eq(expected_translation, 1e-5));
assert!(transform.rotation.abs_diff_eq(Quat::IDENTITY, 1e-5));
let cb_mon = callback_monitor.lock().unwrap();
assert_eq!(cb_mon.invoke_count, times_completed as u64);
assert_eq!(cb_mon.last_reported_count, times_completed);
{
let mut event_reader = event_reader_system_state.get_mut(&mut world);
let event = event_reader.iter().next();
if just_completed {
assert!(event.is_some());
if let Some(event) = event {
assert_eq!(event.entity, entity);
assert_eq!(event.user_data, USER_DATA);
}
} else {
assert!(event.is_none());
}
}
}
// Rewind
tween.rewind();
assert_eq!(tween.direction(), *tweening_direction); // does not change
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
assert_eq!(tween.times_completed(), 0);
// Dummy tick to update target
let actual_state = {
let mut event_writer = event_writer_system_state.get_mut(&mut world);
tween.tick(
Duration::ZERO,
Entity::from_raw(0),
&mut event_writer,
)
};
assert_eq!(actual_state, TweenState::Active);
let expected_translation = if tweening_direction.is_backward() {
Vec3::ONE
} else {
Vec3::ZERO
};
assert!(transform
.translation
.abs_diff_eq(expected_translation, 1e-5));
assert!(transform.rotation.abs_diff_eq(Quat::IDENTITY, 1e-5));
// Clear callback
tween.clear_completed();
assert!(tween.on_completed.is_none());
}
#[test]
fn tween_dir() {
let mut tween = make_test_tween();
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// Default
assert_eq!(tween.direction(), TweeningDirection::Forward);
assert!(abs_diff_eq(tween.progress(), 0.0, 1e-5));
// no-op
tween.set_direction(TweeningDirection::Forward);
assert_eq!(tween.direction(), TweeningDirection::Forward);
assert!(abs_diff_eq(tween.progress(), 0.0, 1e-5));
// Backward
tween.set_direction(TweeningDirection::Backward);
assert_eq!(tween.direction(), TweeningDirection::Backward);
// progress is independent of direction
assert!(abs_diff_eq(tween.progress(), 0.0, 1e-5));
// Progress-invariant
tween.set_direction(TweeningDirection::Forward);
tween.set_progress(0.3);
assert!(abs_diff_eq(tween.progress(), 0.3, 1e-5));
tween.set_direction(TweeningDirection::Backward);
// progress is independent of direction
assert!(abs_diff_eq(tween.progress(), 0.3, 1e-5));
let (mut world, entity, mut transform) = make_test_env();
let mut event_writer_system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = event_writer_system_state.get_mut(&mut world);
// Progress always increases alongside the current direction
tween.set_direction(TweeningDirection::Backward);
assert!(abs_diff_eq(tween.progress(), 0.3, 1e-5));
tween.tick(
Duration::from_secs_f32(0.1),
&mut transform,
&mut event_writer,
);
assert!(abs_diff_eq(tween.progress(), 0.4, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.6), 1e-5));
}
/// Test ticking a sequence of tweens.
#[test]
fn seq_tick() {
let tween1 = Tween::new(
EaseMethod::Linear,
Duration::from_secs_f32(1.0),
TransformPositionLens {
start: Vec3::ZERO,
end: Vec3::ONE,
},
);
let tween2 = Tween::new(
EaseMethod::Linear,
Duration::from_secs_f32(1.0),
TransformRotationLens {
start: Quat::IDENTITY,
},
);
let mut seq = tween1.then(tween2);
let (mut world, entity, mut transform) = make_test_env();
let mut system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = system_state.get_mut(&mut world);
let state = seq.tick(
Duration::from_secs_f32(0.2),
&mut transform,
assert_eq!(state, TweenState::Active);
let r = i as f32 * 0.2;
assert_eq!(transform, Transform::from_translation(Vec3::splat(r)));
assert_eq!(state, TweenState::Active);
assert!(transform.translation.abs_diff_eq(Vec3::ONE, 1e-5));
assert!(transform
.rotation
.abs_diff_eq(Quat::from_rotation_x(alpha_deg.to_radians()), 1e-5));
} else {
assert_eq!(state, TweenState::Completed);
assert!(transform.translation.abs_diff_eq(Vec3::ONE, 1e-5));
.abs_diff_eq(Quat::from_rotation_x(90_f32.to_radians()), 1e-5));
/// Test crossing tween boundaries in one tick.
#[test]
fn seq_tick_boundaries() {
let mut seq = Sequence::new((0..3).map(|i| {
Tween::new(
EaseMethod::Linear,
Duration::from_secs(1),
TransformPositionLens {
start: Vec3::splat(i as f32),
end: Vec3::splat((i + 1) as f32),
},
)
.with_repeat_count(RepeatCount::Finite(1))
}));
let (mut world, entity, mut transform) = make_test_env();
let mut system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = system_state.get_mut(&mut world);
// Tick halfway through the first tween, then in one tick:
// - Finish the first tween
// - Start and finish the second tween
// - Start the third tween
for delta in [0.5, 2.0] {
seq.tick(
Duration::from_secs_f32(delta),
&mut transform,
&mut event_writer,
);
}
assert_eq!(seq.index(), 2);
assert!(transform.translation.abs_diff_eq(Vec3::splat(2.5), 1e-5));
}
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/// Sequence::new() and various Sequence-specific methods
#[test]
fn seq_iter() {
let mut seq = Sequence::new((1..5).map(|i| {
Tween::new(
EaseMethod::Linear,
Duration::from_secs_f32(0.2 * i as f32),
TransformPositionLens {
start: Vec3::ZERO,
end: Vec3::ONE,
},
)
}));
let mut progress = 0.;
for i in 1..5 {
assert_eq!(seq.index(), i - 1);
assert!((seq.progress() - progress).abs() < 1e-5);
let secs = 0.2 * i as f32;
assert_eq!(seq.current().duration(), Duration::from_secs_f32(secs));
progress += 0.25;
seq.set_progress(progress);
assert_eq!(seq.times_completed(), if i == 4 { 1 } else { 0 });
}
seq.rewind();
assert_eq!(seq.progress(), 0.);
assert_eq!(seq.times_completed(), 0);
}
/// Sequence::from_single()
#[test]
fn seq_from_single() {
let tween = Tween::new(
EaseMethod::Linear,
Duration::from_secs(1),
TransformPositionLens {
start: Vec3::ZERO,
end: Vec3::ONE,
},
);
let seq = Sequence::from_single(tween);
assert_eq!(seq.duration(), Duration::from_secs(1));
}
/// Test ticking parallel tracks of tweens.
#[test]
fn tracks_tick() {
let tween1 = Tween::new(
EaseMethod::Linear,
Duration::from_millis(1000),
TransformPositionLens {
start: Vec3::ZERO,
end: Vec3::ONE,
},
);
let tween2 = Tween::new(
EaseMethod::Linear,
Duration::from_millis(800), // shorter
TransformRotationLens {
start: Quat::IDENTITY,
},
);
let mut tracks = Tracks::new([tween1, tween2]);
assert_eq!(tracks.duration(), Duration::from_secs_f32(1.)); // max(1., 0.8)
let (mut world, entity, mut transform) = make_test_env();
let mut system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = system_state.get_mut(&mut world);
let state = tracks.tick(
Duration::from_secs_f32(0.2),
&mut transform,
assert_eq!(state, TweenState::Active);
assert_eq!(tracks.times_completed(), 0);
assert!((tracks.progress() - r).abs() < 1e-5);
assert!(transform.translation.abs_diff_eq(Vec3::splat(r), 1e-5));
assert!(transform
.rotation
.abs_diff_eq(Quat::from_rotation_x(alpha_deg.to_radians()), 1e-5));
} else {
assert_eq!(state, TweenState::Completed);
assert_eq!(tracks.times_completed(), 1);
assert!((tracks.progress() - 1.).abs() < 1e-5);
assert!(transform.translation.abs_diff_eq(Vec3::ONE, 1e-5));
.abs_diff_eq(Quat::from_rotation_x(90_f32.to_radians()), 1e-5));
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tracks.rewind();
assert_eq!(tracks.times_completed(), 0);
assert!(tracks.progress().abs() < 1e-5);
tracks.set_progress(0.9);
assert!((tracks.progress() - 0.9).abs() < 1e-5);
// tick to udpate state (set_progress() does not update state)
let state = tracks.tick(
Duration::from_secs_f32(0.),
&mut transform,
Entity::from_raw(0),
&mut event_writer,
);
assert_eq!(state, TweenState::Active);
assert_eq!(tracks.times_completed(), 0);
tracks.set_progress(3.2);
assert!((tracks.progress() - 1.).abs() < 1e-5);
// tick to udpate state (set_progress() does not update state)
let state = tracks.tick(
Duration::from_secs_f32(0.),
&mut transform,
Entity::from_raw(0),
&mut event_writer,
);
assert_eq!(state, TweenState::Completed);
assert_eq!(tracks.times_completed(), 1); // no looping
tracks.set_progress(-0.5);
assert!(tracks.progress().abs() < 1e-5);
// tick to udpate state (set_progress() does not update state)
let state = tracks.tick(
Duration::from_secs_f32(0.),
&mut transform,
Entity::from_raw(0),
&mut event_writer,
);
assert_eq!(state, TweenState::Active);
assert_eq!(tracks.times_completed(), 0); // no looping
}
/// Delay::then()
#[test]
fn delay_then() {
let seq: Sequence<Transform> =
Delay::new(Duration::from_secs(1)).then(Delay::new(Duration::from_secs(2)));
assert_eq!(seq.duration(), Duration::from_secs(3));
assert_eq!(seq.tweens.len(), 2);
for (i, t) in seq.tweens.iter().enumerate() {
assert_eq!(t.duration(), Duration::from_secs(i as u64 + 1));
}
}
/// Test ticking a delay.
#[test]
fn delay_tick() {
let mut delay = Delay::new(duration);
{
let tweenable: &dyn Tweenable<Transform> = &delay;
assert_eq!(tweenable.duration(), duration);
assert!(tweenable.progress().abs() < 1e-5);
}
// Dummy world and event writer
let (mut world, entity, mut transform) = make_test_env();
let mut system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = system_state.get_mut(&mut world);
for i in 1..=6 {
let state = delay.tick(
&mut event_writer,
);
{
let tweenable: &dyn Tweenable<Transform> = &delay;
if i < 5 {
assert_eq!(state, TweenState::Active);
let r = i as f32 * 0.2;
assert!((tweenable.progress() - r).abs() < 1e-5);
} else {
assert_eq!(state, TweenState::Completed);
assert!((tweenable.progress() - 1.).abs() < 1e-5);
}
}
}
let tweenable: &mut dyn Tweenable<Transform> = &mut delay;
tweenable.rewind();
assert_eq!(tweenable.times_completed(), 0);
assert!(abs_diff_eq(tweenable.progress(), 0., 1e-5));
let state = tweenable.tick(Duration::ZERO, &mut transform, entity, &mut event_writer);
assert_eq!(state, TweenState::Active);
tweenable.set_progress(0.3);
assert_eq!(tweenable.times_completed(), 0);
assert!(abs_diff_eq(tweenable.progress(), 0.3, 1e-5));
tweenable.set_progress(1.);
assert_eq!(tweenable.times_completed(), 1);
assert!(abs_diff_eq(tweenable.progress(), 1., 1e-5));
#[test]
#[should_panic]
fn delay_zero_duration_panics() {
let _ = Delay::new(Duration::ZERO);
}
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#[test]
fn tween_repeat() {
let mut tween = make_test_tween()
.with_repeat_count(RepeatCount::Finite(5))
.with_repeat_strategy(RepeatStrategy::Repeat);
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
let (mut world, entity, mut transform) = make_test_env();
let mut event_writer_system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = event_writer_system_state.get_mut(&mut world);
// 10%
let state = tween.tick(
Duration::from_millis(100),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Active, state);
assert_eq!(0, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0.1, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.1), 1e-5));
// 130%
let state = tween.tick(
Duration::from_millis(1200),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Active, state);
assert_eq!(1, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0.3, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.3), 1e-5));
// 480%
let state = tween.tick(
Duration::from_millis(3500),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Active, state);
assert_eq!(4, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0.8, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.8), 1e-5));
// 500% - done
let state = tween.tick(
Duration::from_millis(200),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Completed, state);
assert_eq!(5, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 1.0, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::ONE, 1e-5));
}
#[test]
fn tween_mirrored_rewind() {
let mut tween = make_test_tween()
.with_repeat_count(RepeatCount::Finite(4))
.with_repeat_strategy(RepeatStrategy::MirroredRepeat);
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
let (mut world, entity, mut transform) = make_test_env();
let mut event_writer_system_state: SystemState<EventWriter<TweenCompleted>> =
SystemState::new(&mut world);
let mut event_writer = event_writer_system_state.get_mut(&mut world);
// 10%
let state = tween.tick(
Duration::from_millis(100),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Active, state);
assert_eq!(TweeningDirection::Forward, tween.direction());
assert_eq!(0, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0.1, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.1), 1e-5));
// rewind
tween.rewind();
assert_eq!(TweeningDirection::Forward, tween.direction());
assert_eq!(0, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.1), 1e-5)); // no-op, rewind doesn't apply Lens
// 120% - mirror
let state = tween.tick(
Duration::from_millis(1200),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweeningDirection::Backward, tween.direction());
assert_eq!(TweenState::Active, state);
assert_eq!(1, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0.2, 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.8), 1e-5));
// rewind
tween.rewind();
assert_eq!(TweeningDirection::Forward, tween.direction()); // restored
assert_eq!(0, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::splat(0.8), 1e-5)); // no-op, rewind doesn't apply Lens
// 400% - done mirror (because Completed freezes the state)
let state = tween.tick(
Duration::from_millis(4000),
&mut transform,
entity,
&mut event_writer,
);
assert_eq!(TweenState::Completed, state);
assert_eq!(TweeningDirection::Backward, tween.direction()); // frozen from last loop
assert_eq!(4, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 1., 1e-5)); // Completed
assert!(transform.translation.abs_diff_eq(Vec3::ZERO, 1e-5));
// rewind
tween.rewind();
assert_eq!(TweeningDirection::Forward, tween.direction()); // restored
assert_eq!(0, tween.times_completed());
assert!(abs_diff_eq(tween.progress(), 0., 1e-5));
assert!(transform.translation.abs_diff_eq(Vec3::ZERO, 1e-5)); // no-op, rewind doesn't apply Lens
}