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Rename new path, replace existing one

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This commit is contained in:
smoogipoo
2019-12-05 17:49:32 +09:00
parent 5e9b739b67
commit 2702edfa55
3 changed files with 93 additions and 366 deletions
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177
osu.Game/Rulesets/Objects/SliderPath.cs
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@ -1,17 +1,20 @@
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// 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 Newtonsoft.Json;
using osu.Framework.Bindables;
using osu.Framework.Caching;
using osu.Framework.MathUtils;
using osu.Game.Rulesets.Objects.Types;
using osuTK;
namespace osu.Game.Rulesets.Objects
{
public struct SliderPath : IEquatable<SliderPath>
public class SliderPath
{
/// <summary>
/// The user-set distance of the path. If non-null, <see cref="Distance"/> will match this value,
@ -20,49 +23,47 @@ namespace osu.Game.Rulesets.Objects
public readonly double? ExpectedDistance;
/// <summary>
/// The type of path.
/// The control points of the path.
/// </summary>
public readonly PathType Type;
public readonly BindableList<PathControlPoint> ControlPoints = new BindableList<PathControlPoint>();
[JsonProperty]
private Vector2[] controlPoints;
public readonly List<int> Test = new List<int>();
private List<Vector2> calculatedPath;
private List<double> cumulativeLength;
private readonly Cached pathCache = new Cached();
private bool isInitialised;
private readonly List<Vector2> calculatedPath = new List<Vector2>();
private readonly List<double> cumulativeLength = new List<double>();
/// <summary>
/// Creates a new <see cref="SliderPath"/>.
/// </summary>
/// <param name="type">The type of path.</param>
/// <param name="controlPoints">The control points of the path.</param>
/// <param name="expectedDistance">A user-set distance of the path that may be shorter or longer than the true distance between all
/// <paramref name="controlPoints"/>. The path will be shortened/lengthened to match this length.
/// If null, the path will use the true distance between all <paramref name="controlPoints"/>.</param>
/// <param name="controlPoints">An optional set of <see cref="PathControlPoint"/>s to initialise the path with.</param>
/// <param name="expectedDistance">A user-set distance of the path that may be shorter or longer than the true distance between all control points.
/// The path will be shortened/lengthened to match this length. If null, the path will use the true distance between all control points.</param>
[JsonConstructor]
public SliderPath(PathType type, Vector2[] controlPoints, double? expectedDistance = null)
public SliderPath(PathControlPoint[] controlPoints = null, double? expectedDistance = null)
{
this = default;
this.controlPoints = controlPoints;
Type = type;
ExpectedDistance = expectedDistance;
ensureInitialised();
}
/// <summary>
/// The control points of the path.
/// </summary>
[JsonIgnore]
public ReadOnlySpan<Vector2> ControlPoints
{
get
ControlPoints.ItemsAdded += items =>
{
ensureInitialised();
return controlPoints.AsSpan();
}
foreach (var c in items)
c.Changed += onControlPointChanged;
onControlPointChanged();
};
ControlPoints.ItemsRemoved += items =>
{
foreach (var c in items)
c.Changed -= onControlPointChanged;
onControlPointChanged();
};
ControlPoints.AddRange(controlPoints);
void onControlPointChanged() => pathCache.Invalidate();
}
/// <summary>
@ -73,7 +74,7 @@ namespace osu.Game.Rulesets.Objects
{
get
{
ensureInitialised();
ensureValid();
return cumulativeLength.Count == 0 ? 0 : cumulativeLength[cumulativeLength.Count - 1];
}
}
@ -87,7 +88,7 @@ namespace osu.Game.Rulesets.Objects
/// <param name="p1">End progress. Ranges from 0 (beginning of the slider) to 1 (end of the slider).</param>
public void GetPathToProgress(List<Vector2> path, double p0, double p1)
{
ensureInitialised();
ensureValid();
double d0 = progressToDistance(p0);
double d1 = progressToDistance(p1);
@ -116,82 +117,84 @@ namespace osu.Game.Rulesets.Objects
/// <returns></returns>
public Vector2 PositionAt(double progress)
{
ensureInitialised();
ensureValid();
double d = progressToDistance(progress);
return interpolateVertices(indexOfDistance(d), d);
}
private void ensureInitialised()
private void ensureValid()
{
if (isInitialised)
if (pathCache.IsValid)
return;
isInitialised = true;
controlPoints ??= Array.Empty<Vector2>();
calculatedPath = new List<Vector2>();
cumulativeLength = new List<double>();
calculatePath();
calculateCumulativeLength();
}
private List<Vector2> calculateSubpath(ReadOnlySpan<Vector2> subControlPoints)
{
switch (Type)
{
case PathType.Linear:
return PathApproximator.ApproximateLinear(subControlPoints);
case PathType.PerfectCurve:
//we can only use CircularArc iff we have exactly three control points and no dissection.
if (ControlPoints.Length != 3 || subControlPoints.Length != 3)
break;
// Here we have exactly 3 control points. Attempt to fit a circular arc.
List<Vector2> subpath = PathApproximator.ApproximateCircularArc(subControlPoints);
// If for some reason a circular arc could not be fit to the 3 given points, fall back to a numerically stable bezier approximation.
if (subpath.Count == 0)
break;
return subpath;
case PathType.Catmull:
return PathApproximator.ApproximateCatmull(subControlPoints);
}
return PathApproximator.ApproximateBezier(subControlPoints);
pathCache.Validate();
}
private void calculatePath()
{
calculatedPath.Clear();
// Sliders may consist of various subpaths separated by two consecutive vertices
// with the same position. The following loop parses these subpaths and computes
// their shape independently, consecutively appending them to calculatedPath.
if (ControlPoints.Count == 0)
return;
if (ControlPoints[0].Type.Value == null)
throw new InvalidOperationException($"The first control point in a {nameof(SliderPath)} must have a non-null type.");
Vector2[] vertices = new Vector2[ControlPoints.Count];
for (int i = 0; i < ControlPoints.Count; i++)
vertices[i] = ControlPoints[i].Position.Value;
int start = 0;
int end = 0;
for (int i = 0; i < ControlPoints.Length; ++i)
for (int i = 0; i < ControlPoints.Count; i++)
{
end++;
if (ControlPoints[i].Type.Value == null && i < ControlPoints.Count - 1)
continue;
if (i == ControlPoints.Length - 1 || ControlPoints[i] == ControlPoints[i + 1])
Debug.Assert(ControlPoints[start].Type.Value.HasValue);
// The current vertex ends the segment
var segmentVertices = vertices.AsSpan().Slice(start, i - start + 1);
var segmentType = ControlPoints[start].Type.Value.Value;
foreach (Vector2 t in computeSubPath(segmentVertices, segmentType))
{
ReadOnlySpan<Vector2> cpSpan = ControlPoints.Slice(start, end - start);
foreach (Vector2 t in calculateSubpath(cpSpan))
{
if (calculatedPath.Count == 0 || calculatedPath.Last() != t)
calculatedPath.Add(t);
}
start = end;
if (calculatedPath.Count == 0 || calculatedPath.Last() != t)
calculatedPath.Add(t);
}
// Start the new segment at the current vertex
start = i;
}
static List<Vector2> computeSubPath(ReadOnlySpan<Vector2> subControlPoints, PathType type)
{
switch (type)
{
case PathType.Linear:
return PathApproximator.ApproximateLinear(subControlPoints);
case PathType.PerfectCurve:
if (subControlPoints.Length != 3)
break;
List<Vector2> subpath = PathApproximator.ApproximateCircularArc(subControlPoints);
// If for some reason a circular arc could not be fit to the 3 given points, fall back to a numerically stable bezier approximation.
if (subpath.Count == 0)
break;
return subpath;
case PathType.Catmull:
return PathApproximator.ApproximateCatmull(subControlPoints);
}
return PathApproximator.ApproximateBezier(subControlPoints);
}
}
@ -272,7 +275,5 @@ namespace osu.Game.Rulesets.Objects
double w = (d - d0) / (d1 - d0);
return p0 + (p1 - p0) * (float)w;
}
public bool Equals(SliderPath other) => ControlPoints.SequenceEqual(other.ControlPoints) && ExpectedDistance == other.ExpectedDistance && Type == other.Type;
}
}