public static IObservable <CourseEditorState> Create(CourseEditorActions actions, CourseData courseData,
Ref <ImmutableTransform> cameraTransform)
{
var commands = actions.CreateProp.Select(StoreAction.Create <Unit>("createProp"))
.Merge(actions.CreatePropOnLocation.Select(StoreAction.Create <ImmutableTransform>("createPropOnLocation")))
.Merge(actions.DeleteProp.Select(StoreAction.Create <PropId>("deleteProp")))
.Merge(actions.DeleteSelectedProp.Select(StoreAction.Create <Unit>("deleteSelectedProp")))
.Merge(actions.UpdateProp.Select(StoreAction.Create <Tuple <PropId, ImmutableTransform> >("updateProp")))
.Merge(actions.HighlightProp.Select(StoreAction.Create <Maybe <PropId> >("highlightProp")))
.Merge(actions.SelectProp.Select(StoreAction.Create <Maybe <PropId> >("selectProp")))
.Merge(actions.SelectPropType.Select(StoreAction.Create <PropType>("selectPropType")))
.Merge(actions.ReorderProps.Select(StoreAction.Create <IImmutableList <PropId> >("reorderProps")))
.Merge(actions.Undo.Select(StoreAction.Create <Unit>("undo")))
.Merge(actions.Redo.Select(StoreAction.Create <Unit>("redo")));
var initialHistoricalState = courseData.ToCourseEditorState();
var updatesWithHistory = commands
.Scan(new AppState <HistoricalCourseEditorState>(initialHistoricalState), (currentAppState, command) => {
var currentState = currentAppState.CurrentState;
AppState <HistoricalCourseEditorState> newAppState = currentAppState;
if (command.Id.Equals("createProp"))
{
var propTransform = cameraTransform.Deref().TranslateLocally(new Vector3(0, 0, 30));
newAppState = History.AddNewState(currentAppState, currentState.AddProp(propTransform));
}
else if (command.Id.Equals("createPropOnLocation"))
{
newAppState = History.AddNewState(currentAppState, currentState.AddProp((ImmutableTransform)command.Arguments));
}
else if (command.Id.Equals("updateProp"))
{
var args = (Tuple <PropId, ImmutableTransform>)command.Arguments;
var prop = currentState.Props[args._1];
var isTransformChanged = !prop.Transform.Equals(args._2);
if (isTransformChanged)
{
var updatedProp = prop.UpdateTransform(args._2);
newAppState = History.AddNewState(currentAppState, currentState.UpdateProp(updatedProp));
}
else
{
newAppState = currentAppState;
}
}
else if (command.Id.Equals("deleteProp"))
{
var propId = (PropId)command.Arguments;
if (currentState.PropOrder.Contains(propId))
{
newAppState = History.AddNewState(currentAppState, currentState.DeleteProp(propId));
}
}
else if (command.Id.Equals("deleteSelectedProp"))
{
if (currentState.SelectedProp.IsJust)
{
newAppState = History.AddNewState(currentAppState, currentState.DeleteProp(currentState.SelectedProp.Value));
}
}
else if (command.Id.Equals("selectProp"))
{
var selectedPropId = (Maybe <PropId>)command.Arguments;
if (selectedPropId.IsNothing ||
(selectedPropId.IsJust && currentState.Props.ContainsKey(selectedPropId.Value)))
{
newAppState = History.AddNewState(currentAppState, currentState.SelectProp(selectedPropId));
}
}
else if (command.Id.Equals("selectPropType"))
{
newAppState = History.AddNewState(currentAppState, currentState.SelectPropType((PropType)command.Arguments));
}
else if (command.Id.Equals("reorderProps"))
{
newAppState = History.AddNewState(currentAppState, currentState.UpdatePropOrder((IImmutableList <PropId>)command.Arguments));
}
else if (command.Id.Equals("undo"))
{
newAppState = History.Undo(currentAppState);
}
else if (command.Id.Equals("redo"))
{
newAppState = History.Redo(currentAppState);
}
else
{
newAppState = currentAppState;
}
return(newAppState);
})
.Select(appState => {
return(appState.CurrentState.UpdateUndoRedoAvailability(
!appState.UndoStack.IsEmpty, !appState.RedoStack.IsEmpty));
})
.StartWith(initialHistoricalState)
.Publish();
var initialTransientState = new TransientCourseEditorState(courseData.Name, Maybe.Nothing <PropId>(), TransformTool.Move);
var transientUpdates = actions.HighlightProp.Select(StoreAction.Create <Maybe <PropId> >("highlightProp"))
.Merge(actions.SelectTransformTool.Select(StoreAction.Create <TransformTool>("selectTransformTool")))
.Merge(actions.UpdateName.Select(StoreAction.Create <string>("updateName")))
.Scan(initialTransientState, (state, command) => {
if (command.Id.Equals("highlightProp"))
{
return(state.HighlightProp((Maybe <PropId>)command.Arguments));
}
else if (command.Id.Equals("selectTransformTool"))
{
// TODO Prevent transform tool selection when no prop is selected
return(state.SelectTransformTool((TransformTool)command.Arguments));
}
else if (command.Id.Equals("updateName"))
{
return(state.UpdateName((string)command.Arguments));
}
return(state);
})
.DistinctUntilChanged()
.StartWith(initialTransientState)
.CombineLatest(updatesWithHistory, (transientState, histState) => {
// Check if the highlighted prop still exists
var highlightedProp = transientState.HighlightedProp;
var isHighlightedItemDeleted = highlightedProp.IsJust &&
!histState.Props.ContainsKey(highlightedProp.Value);
if (isHighlightedItemDeleted)
{
return(transientState.HighlightProp(Maybe.Nothing <PropId>()));
}
return(transientState);
});
var updates = updatesWithHistory.CombineLatest(
transientUpdates, (histState, transientState) => new CourseEditorState(histState, transientState))
.DistinctUntilChanged()
.Replay(1);
updates.Connect();
updatesWithHistory.Connect();
return(updates);
}
public static void InitializeCourseEditor(CourseEditorActions actions, IObservable <CourseEditorState> store,
Camera camera, Ref <ImmutableTransform> cameraTransform, RingProps renderableProps,
PropRenderer <PropId> propRenderer,
IClock clock)
{
var courseUpdates = store
.Do(state => {
var rProps = state.Props.Select(kvPair => {
var propId = kvPair.Key;
var prop = kvPair.Value;
return(new KeyValuePair <PropId, RenderableProp>(
propId, new RenderableProp(prop.Transform, renderableProps.Factory[prop.PropType].Spawn)));
})
.ToDictionary();
propRenderer.Update(rProps);
}).Replay(1);
courseUpdates.Connect();
var keyboardEvents = UnityRxKeyboard.CreateKeyboard();
var highlight = ObjectPlacement.ObjectHighlight(camera, LayerMaskUtil.FullMask)
.Select(go => {
if (go.IsJust)
{
var id = go.Value.GetComponent <Id>();
if (id != null && id.Value.StartsWith("__CourseEditor-"))
{
return(Maybe.Just(new PropId(id.Value.Replace("__CourseEditor-", ""))));
}
return(Maybe.Nothing <PropId>());
}
return(Maybe.Nothing <PropId>());
});
var leftMouseClick = keyboardEvents
.KeyDown()
.Where(c => c == KeyCode.Mouse0)
.Select(c => Unit.Default);
var selection = ObjectPlacement.ObjectSelection(highlight, leftMouseClick);
IObservable <Unit> undo;
IObservable <Unit> redo;
// Editor already binds to default undo/redo keys so we need a different
// mapping for them
if (Application.isEditor)
{
undo = UnityObservable.CreateUpdate <Unit>(observer => {
if (UnityEngine.Input.GetKeyDown(KeyCode.Z))
{
observer.OnNext(Unit.Default);
}
});
redo = UnityObservable.CreateUpdate <Unit>(observer => {
if (UnityEngine.Input.GetKeyDown(KeyCode.Y))
{
observer.OnNext(Unit.Default);
}
});
}
else
{
var historyCommands = UnityObservable.CreateUpdate <string>(observer => {
if (UnityEngine.Input.GetKey(KeyCode.LeftControl) && UnityEngine.Input.GetKeyDown(KeyCode.Y))
{
observer.OnNext("redo");
}
else if (UnityEngine.Input.GetKey(KeyCode.LeftControl) && UnityEngine.Input.GetKeyDown(KeyCode.Z))
{
observer.OnNext("undo");
}
});
undo = historyCommands
.Where(c => c.Equals("undo"))
.Select(c => Unit.Default);
redo = historyCommands
.Where(c => c.Equals("redo"))
.Select(c => Unit.Default);
}
var createProp = UnityObservable.CreateUpdate <Unit>(observer => {
if (UnityEngine.Input.GetKey(KeyCode.LeftControl) && UnityEngine.Input.GetKeyDown(KeyCode.F))
{
observer.OnNext(Unit.Default);
}
});
var deleteProp = keyboardEvents
.KeyDown()
.Where(key => key == KeyCode.Delete)
.Select(key => Unit.Default);
Func <KeyCode, Vector3> key2Translation = key => {
if (key == KeyCode.W)
{
return(new Vector3(0, 0, 1));
}
else if (key == KeyCode.S)
{
return(new Vector3(0, 0, -1));
}
else if (key == KeyCode.A)
{
return(new Vector3(-1, 0, 0));
}
else if (key == KeyCode.D)
{
return(new Vector3(1, 0, 0));
}
else if (key == KeyCode.Q)
{
return(new Vector3(0, -1, 0));
}
else if (key == KeyCode.E)
{
return(new Vector3(0, 1, 0));
}
return(Vector3.zero);
};
Func <KeyCode, Vector3> key2Rotation = key => {
if (key == KeyCode.W)
{
return(new Vector3(1, 0, 0));
}
else if (key == KeyCode.S)
{
return(new Vector3(-1, 0, 0));
}
else if (key == KeyCode.D)
{
return(new Vector3(0, 1, 0));
}
else if (key == KeyCode.A)
{
return(new Vector3(0, -1, 0));
}
return(Vector3.zero);
};
var selectedTransformTool = courseUpdates
.Select(state => state.SelectedTransformTool)
.DistinctUntilChanged(EnumComparer <TransformTool> .Instance);
var switchTransformTool = selectedTransformTool.Select(tool => {
return(UnityObservable.CreateUpdate <Unit>(observer => {
if (UnityEngine.Input.GetKeyDown(KeyCode.LeftAlt) || UnityEngine.Input.GetKeyDown(KeyCode.RightAlt))
{
observer.OnNext(Unit.Default);
}
})
.Select(_ => CourseEditor.TransformTools.GetNext(tool)));
}).Switch();
var ticks = UnityRxObservables.UpdateTicks(() => clock.DeltaTime);
var keysHeldStream =
UnityRxKeyboard.CreateKeyboard(new[]
{ KeyCode.W, KeyCode.S, KeyCode.A, KeyCode.D, KeyCode.Q, KeyCode.E, KeyCode.Mouse1 }).KeysHeld();
var combinedTransformation = ticks.CombineLatest(
keysHeldStream.CombineLatest(selectedTransformTool,
(keysHeld, transformTool) => new { KeysHeld = keysHeld, TransformTool = transformTool }),
(deltaTime, data) => {
var rotationSpeed = 80f;
var movementSpeed = 16f;
var transform = ImmutableTransform.Identity;
// Prevent collision with spectator camera movement.
if (!data.KeysHeld.Contains(KeyCode.Mouse1))
{
if (data.TransformTool == TransformTool.Rotate)
{
var rotation = data.KeysHeld
.Aggregate(Vector3.zero, (current, key) => current + key2Rotation(key))
.normalized *rotationSpeed *deltaTime;
transform = transform.Rotate(rotation);
}
else
{
var translation = data.KeysHeld
.Aggregate(Vector3.zero, (current, key) => current + key2Translation(key))
.normalized *movementSpeed *deltaTime;
transform = transform.Translate(translation);
}
}
return(transform);
});
var combinedTransformation2 = combinedTransformation
.Window(() => {
return(combinedTransformation
.Where(t => t.Equals(ImmutableTransform.Identity)));
});
var currentselectedProp = courseUpdates
.Select(
state => {
var prop = state.SelectedProp.IsJust
? Maybe.Just(state.Props[state.SelectedProp.Value])
: Maybe.Nothing <EditorProp>();
return(prop);
})
.DistinctUntilChanged();
var moveProp =
currentselectedProp.CombineLatest(combinedTransformation2, (selectedProp, transformationCommand) => {
if (selectedProp.IsJust)
{
return(transformationCommand.Scan(
new Tuple <PropId, ImmutableTransform>(selectedProp.Value.Id, selectedProp.Value.Transform),
(accumulatedMovement, transformation) => {
var transformUpdate = accumulatedMovement._2
.Rotate(transformation.Rotation)
.Translate(transformation.Position, cameraTransform.V.Rotation)
.Scale(transformation.Scale);
return new Tuple <PropId, ImmutableTransform>(accumulatedMovement._1, transformUpdate);
}));
}
else
{
return(Observable.Empty <Tuple <PropId, ImmutableTransform> >());
}
});
moveProp.Switch()
.Subscribe(gameObjectMoveCommand => {
var propId = gameObjectMoveCommand._1;
var newTransform = gameObjectMoveCommand._2;
var go = propRenderer.GetProp(propId);
go.SetTransform(newTransform);
});
moveProp
.Select(moveCommand => moveCommand.TakeLast(1))
.Switch()
.Subscribe(moveCommand => actions.UpdateProp.OnNext(moveCommand));
var moveToNextProp = UnityObservable.CreateUpdate <string>(observer => {
if (UnityEngine.Input.GetKey(KeyCode.LeftControl) && UnityEngine.Input.GetKeyDown(KeyCode.Tab))
{
observer.OnNext("previous");
}
else if (UnityEngine.Input.GetKeyDown(KeyCode.Tab))
{
observer.OnNext("next");
}
});
courseUpdates
.Select(state => {
if (state.PropOrder.Count > 0)
{
return(moveToNextProp.Select(command => {
if (state.SelectedProp.IsJust)
{
if (command.Equals("next"))
{
return state.PropOrder.GetNext(state.SelectedProp.Value);
}
else if (command.Equals("previous"))
{
return state.PropOrder.GetPrevious(state.SelectedProp.Value);
}
}
return state.PropOrder.First();
}));
}
return(Observable.Empty <PropId>());
})
.Switch()
.Subscribe(newlySelectedProp => {
actions.SelectProp.OnNext(Maybe.Just(newlySelectedProp));
actions.MoveToProp.OnNext(newlySelectedProp);
});
// TODO When player presses 'V' move prop to camera perspective.
createProp.Subscribe(_ => actions.CreateProp.OnNext(Unit.Default));
deleteProp.Subscribe(_ => actions.DeleteSelectedProp.OnNext(Unit.Default));
undo.Subscribe(_ => actions.Undo.OnNext(Unit.Default));
redo.Subscribe(_ => actions.Redo.OnNext(Unit.Default));
highlight.Subscribe(propId => actions.HighlightProp.OnNext(propId));
selection.Subscribe(propId => actions.SelectProp.OnNext(Maybe.Just(propId)));
switchTransformTool.Subscribe(tool => actions.SelectTransformTool.OnNext(tool));
var moveToProp = courseUpdates.Select(state => {
return(actions.MoveToProp.Select(propId => state.Props[propId]));
}).Switch();
moveToProp.Subscribe(prop => {
Vector3 cameraRotation = cameraTransform.V.Rotation.eulerAngles;
var propRotation = prop.Transform.Rotation.eulerAngles;
cameraTransform.V = prop.Transform
.TranslateLocally(new Vector3(0, 0, -30))
.UpdateRotation(cameraRotation.X(propRotation.x).Y(propRotation.y));
});
// TODO This code can be much simpler
var guiUpdates = courseUpdates
.Scan(new Diff <ObjectSelectionState?>(null, null), (previousDiff, state) => {
Func <Maybe <PropId>, Maybe <GameObject> > findGameObject = propId => {
return(propId.IsJust
? Maybe.Of(propRenderer.GetProp(propId.Value))
: Maybe.Nothing <GameObject>());
};
var @new = new ObjectSelectionState(findGameObject(state.HighlightedProp),
findGameObject(state.SelectedProp));
var old = previousDiff.New;
if (old.HasValue)
{
if (old.Value.HighlightedObject.IsJust && old.Value.HighlightedObject.Value == null)
{
old = new ObjectSelectionState(Maybe.Nothing <GameObject>(), old.Value.SelectedObject);
}
if (old.Value.SelectedObject.IsJust && old.Value.SelectedObject.Value == null)
{
old = new ObjectSelectionState(old.Value.HighlightedObject, Maybe.Nothing <GameObject>());
}
}
return(new Diff <ObjectSelectionState?>(old, @new));
});
guiUpdates.Subscribe(guiState => {
if (guiState.Old.HasValue)
{
guiState.Old.Value.HighlightedObject.Do(obj => obj.GetComponentOfInterface <IHighlightable>().UnHighlight());
guiState.Old.Value.SelectedObject.Do(obj => obj.GetComponentOfInterface <ISelectable>().UnSelect());
}
guiState.New.Value.HighlightedObject.Do(obj => obj.GetComponentOfInterface <IHighlightable>().Highlight());
guiState.New.Value.SelectedObject.Do(obj => obj.GetComponentOfInterface <ISelectable>().Select());
});
}