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osu-lazer/osu.Game.Rulesets.Osu/Edit/OsuSelectionRotationHandler.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Objects.Types;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Screens.Edit;
using osu.Game.Screens.Edit.Compose.Components;
using osu.Game.Utils;
using osuTK;
namespace osu.Game.Rulesets.Osu.Edit
{
public partial class OsuSelectionRotationHandler : SelectionRotationHandler
{
[Resolved]
private IEditorChangeHandler? changeHandler { get; set; }
private BindableList<HitObject> selectedItems { get; } = new BindableList<HitObject>();
[BackgroundDependencyLoader]
private void load(EditorBeatmap editorBeatmap)
{
selectedItems.BindTo(editorBeatmap.SelectedHitObjects);
}
protected override void LoadComplete()
{
base.LoadComplete();
selectedItems.CollectionChanged += (_, __) => updateState();
updateState();
}
private void updateState()
{
var quad = GeometryUtils.GetSurroundingQuad(selectedMovableObjects);
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CanRotateAroundSelectionOrigin.Value = quad.Width > 0 || quad.Height > 0;
CanRotateAroundPlayfieldOrigin.Value = selectedMovableObjects.Any();
}
private OsuHitObject[]? objectsInRotation;
private Vector2? defaultOrigin;
private Dictionary<OsuHitObject, Vector2>? originalPositions;
private Dictionary<IHasPath, Vector2[]>? originalPathControlPointPositions;
public override void Begin()
{
if (OperationInProgress.Value)
throw new InvalidOperationException($"Cannot {nameof(Begin)} a rotate operation while another is in progress!");
base.Begin();
changeHandler?.BeginChange();
objectsInRotation = selectedMovableObjects.ToArray();
defaultOrigin = GeometryUtils.GetSurroundingQuad(objectsInRotation).Centre;
originalPositions = objectsInRotation.ToDictionary(obj => obj, obj => obj.Position);
originalPathControlPointPositions = objectsInRotation.OfType<IHasPath>().ToDictionary(
obj => obj,
obj => obj.Path.ControlPoints.Select(point => point.Position).ToArray());
}
public override void Update(float rotation, Vector2? origin = null)
{
if (!OperationInProgress.Value)
throw new InvalidOperationException($"Cannot {nameof(Update)} a rotate operation without calling {nameof(Begin)} first!");
Debug.Assert(objectsInRotation != null && originalPositions != null && originalPathControlPointPositions != null && defaultOrigin != null);
Vector2 actualOrigin = origin ?? defaultOrigin.Value;
foreach (var ho in objectsInRotation)
{
ho.Position = GeometryUtils.RotatePointAroundOrigin(originalPositions[ho], actualOrigin, rotation);
if (ho is IHasPath withPath)
{
var originalPath = originalPathControlPointPositions[withPath];
for (int i = 0; i < withPath.Path.ControlPoints.Count; ++i)
withPath.Path.ControlPoints[i].Position = GeometryUtils.RotatePointAroundOrigin(originalPath[i], Vector2.Zero, rotation);
}
}
}
public override void Commit()
{
if (!OperationInProgress.Value)
throw new InvalidOperationException($"Cannot {nameof(Commit)} a rotate operation without calling {nameof(Begin)} first!");
changeHandler?.EndChange();
base.Commit();
objectsInRotation = null;
originalPositions = null;
originalPathControlPointPositions = null;
defaultOrigin = null;
}
private IEnumerable<OsuHitObject> selectedMovableObjects => selectedItems.Cast<OsuHitObject>()
.Where(h => h is not Spinner);
}
}