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860 行
31 KiB
860 行
31 KiB
using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace UnityEditor.Experimental.VFX.Toolbox
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{
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internal sealed class CurveEditor
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{
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#region Enums
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enum EditMode
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{
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None,
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Moving,
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TangentEdit
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}
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enum Tangent
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{
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In,
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Out
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}
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#endregion
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#region Structs
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public struct Settings
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{
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public Rect bounds;
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public RectOffset padding;
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public Color selectionColor;
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public float curvePickingDistance;
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public float keyTimeClampingDistance;
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public static Settings defaultSettings
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{
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get
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{
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return new Settings
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{
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bounds = new Rect(0f, 0f, 1f, 1f),
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padding = new RectOffset(10, 10, 10, 10),
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selectionColor = Color.yellow,
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curvePickingDistance = 6f,
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keyTimeClampingDistance = 1e-4f
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};
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}
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}
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}
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public struct CurveState
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{
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public bool visible;
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public bool editable;
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public uint minPointCount;
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public float zeroKeyConstantValue;
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public Color color;
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public float width;
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public float handleWidth;
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public bool showNonEditableHandles;
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public bool onlyShowHandlesOnSelection;
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public bool loopInBounds;
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public static CurveState defaultState
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{
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get
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{
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return new CurveState
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{
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visible = true,
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editable = true,
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minPointCount = 2,
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zeroKeyConstantValue = 0f,
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color = Color.white,
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width = 2f,
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handleWidth = 2f,
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showNonEditableHandles = true,
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onlyShowHandlesOnSelection = false,
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loopInBounds = false
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};
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}
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}
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}
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public struct Selection
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{
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public SerializedProperty curve;
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public int keyframeIndex;
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public Keyframe? keyframe;
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public Selection(SerializedProperty curve, int keyframeIndex, Keyframe? keyframe)
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{
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this.curve = curve;
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this.keyframeIndex = keyframeIndex;
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this.keyframe = keyframe;
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}
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}
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internal struct MenuAction
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{
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internal SerializedProperty curve;
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internal int index;
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internal Vector3 position;
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internal MenuAction(SerializedProperty curve)
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{
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this.curve = curve;
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this.index = -1;
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this.position = Vector3.zero;
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}
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internal MenuAction(SerializedProperty curve, int index)
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{
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this.curve = curve;
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this.index = index;
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this.position = Vector3.zero;
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}
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internal MenuAction(SerializedProperty curve, Vector3 position)
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{
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this.curve = curve;
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this.index = -1;
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this.position = position;
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}
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}
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#endregion
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#region Fields & properties
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public Settings settings { get; private set; }
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Dictionary<SerializedProperty, CurveState> m_Curves;
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Rect m_CurveArea;
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SerializedProperty m_SelectedCurve;
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int m_SelectedKeyframeIndex = -1;
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EditMode m_EditMode = EditMode.None;
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Tangent m_TangentEditMode;
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bool m_Dirty;
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#endregion
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#region Constructors & destructors
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public CurveEditor()
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: this(Settings.defaultSettings)
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{}
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public CurveEditor(Settings settings)
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{
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this.settings = settings;
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m_Curves = new Dictionary<SerializedProperty, CurveState>();
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}
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#endregion
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#region Public API
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public void Add(params SerializedProperty[] curves)
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{
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foreach (var curve in curves)
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Add(curve, CurveState.defaultState);
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}
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public void Add(SerializedProperty curve)
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{
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Add(curve, CurveState.defaultState);
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}
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public void Add(SerializedProperty curve, CurveState state)
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{
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// Make sure the property is in fact an AnimationCurve
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var animCurve = curve.animationCurveValue;
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if (animCurve == null)
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throw new ArgumentException("curve");
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if (m_Curves.ContainsKey(curve))
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Debug.LogWarning("Curve has already been added to the editor");
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m_Curves.Add(curve, state);
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}
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public void Remove(SerializedProperty curve)
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{
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m_Curves.Remove(curve);
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}
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public void RemoveAll()
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{
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m_Curves.Clear();
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}
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public CurveState GetCurveState(SerializedProperty curve)
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{
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CurveState state;
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if (!m_Curves.TryGetValue(curve, out state))
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throw new KeyNotFoundException("curve");
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return state;
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}
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public void SetCurveState(SerializedProperty curve, CurveState state)
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{
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if (!m_Curves.ContainsKey(curve))
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throw new KeyNotFoundException("curve");
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m_Curves[curve] = state;
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}
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public Selection GetSelection()
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{
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Keyframe? key = null;
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if (m_SelectedKeyframeIndex > -1)
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{
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var curve = m_SelectedCurve.animationCurveValue;
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if (m_SelectedKeyframeIndex >= curve.length)
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m_SelectedKeyframeIndex = -1;
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else
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key = curve[m_SelectedKeyframeIndex];
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}
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return new Selection(m_SelectedCurve, m_SelectedKeyframeIndex, key);
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}
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public void ClearSelection()
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{
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m_SelectedCurve = null;
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m_SelectedKeyframeIndex = -1;
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}
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public void SetKeyframe(SerializedProperty curve, int keyframeIndex, Keyframe keyframe)
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{
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var animCurve = curve.animationCurveValue;
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SetKeyframe(animCurve, keyframeIndex, keyframe);
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SaveCurve(curve, animCurve);
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}
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public void SetBounds(Rect bounds)
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{
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var newSettings = settings;
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newSettings.bounds = bounds;
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settings = newSettings;
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}
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public bool OnGUI(Rect rect)
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{
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if(Event.current.type == EventType.Repaint)
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m_Dirty = false;
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GUI.BeginClip(rect);
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{
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var area = new Rect(Vector2.zero, rect.size);
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m_CurveArea = settings.padding.Remove(area);
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foreach (var curve in m_Curves)
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OnCurveGUI(area, curve.Key, curve.Value);
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OnGeneralUI(area);
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}
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GUI.EndClip();
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return m_Dirty;
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}
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#endregion
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#region UI & events
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void OnCurveGUI(Rect rect, SerializedProperty curve, CurveState state)
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{
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// Discard invisible curves
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if (!state.visible)
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return;
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var animCurve = curve.animationCurveValue;
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var keys = animCurve.keys;
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var length = keys.Length;
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// Curve drawing
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// Slightly dim non-editable curves
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var color = state.color;
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if (!state.editable)
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color.a *= 0.5f;
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Handles.color = color;
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var bounds = settings.bounds;
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if (length == 0)
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{
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var p1 = CurveToCanvas(new Vector3(bounds.xMin, state.zeroKeyConstantValue));
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var p2 = CurveToCanvas(new Vector3(bounds.xMax, state.zeroKeyConstantValue));
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Handles.DrawAAPolyLine(state.width, p1, p2);
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}
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else if (length == 1)
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{
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var p1 = CurveToCanvas(new Vector3(bounds.xMin, keys[0].value));
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var p2 = CurveToCanvas(new Vector3(bounds.xMax, keys[0].value));
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Handles.DrawAAPolyLine(state.width, p1, p2);
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}
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else
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{
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var prevKey = keys[0];
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for (int k = 1; k < length; k++)
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{
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var key = keys[k];
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var pts = BezierSegment(prevKey, key);
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if (float.IsInfinity(prevKey.outTangent) || float.IsInfinity(key.inTangent))
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{
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var s = HardSegment(prevKey, key);
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Handles.DrawAAPolyLine(state.width, s[0], s[1], s[2]);
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}
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else Handles.DrawBezier(pts[0], pts[3], pts[1], pts[2], color, null, state.width);
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prevKey = key;
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}
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// Curve extents & loops
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if (keys[0].time > bounds.xMin)
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{
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if (state.loopInBounds)
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{
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var p1 = keys[length - 1];
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p1.time -= settings.bounds.width;
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var p2 = keys[0];
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var pts = BezierSegment(p1, p2);
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if (float.IsInfinity(p1.outTangent) || float.IsInfinity(p2.inTangent))
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{
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var s = HardSegment(p1, p2);
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Handles.DrawAAPolyLine(state.width, s[0], s[1], s[2]);
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}
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else Handles.DrawBezier(pts[0], pts[3], pts[1], pts[2], color, null, state.width);
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}
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else
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{
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var p1 = CurveToCanvas(new Vector3(bounds.xMin, keys[0].value));
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var p2 = CurveToCanvas(keys[0]);
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Handles.DrawAAPolyLine(state.width, p1, p2);
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}
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}
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if (keys[length - 1].time < bounds.xMax)
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{
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if (state.loopInBounds)
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{
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var p1 = keys[length - 1];
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var p2 = keys[0];
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p2.time += settings.bounds.width;
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var pts = BezierSegment(p1, p2);
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if (float.IsInfinity(p1.outTangent) || float.IsInfinity(p2.inTangent))
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{
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var s = HardSegment(p1, p2);
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Handles.DrawAAPolyLine(state.width, s[0], s[1], s[2]);
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}
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else Handles.DrawBezier(pts[0], pts[3], pts[1], pts[2], color, null, state.width);
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}
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else
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{
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var p1 = CurveToCanvas(keys[length - 1]);
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var p2 = CurveToCanvas(new Vector3(bounds.xMax, keys[length - 1].value));
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Handles.DrawAAPolyLine(state.width, p1, p2);
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}
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}
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}
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// Make sure selection is correct (undo can break it)
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bool isCurrentlySelectedCurve = curve == m_SelectedCurve;
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if (isCurrentlySelectedCurve && m_SelectedKeyframeIndex >= length)
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m_SelectedKeyframeIndex = -1;
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// Handles & keys
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for (int k = 0; k < length; k++)
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{
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bool isCurrentlySelectedKeyframe = k == m_SelectedKeyframeIndex;
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var e = Event.current;
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var pos = CurveToCanvas(keys[k]);
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var hitRect = new Rect(pos.x - 8f, pos.y - 8f, 16f, 16f);
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var offset = isCurrentlySelectedCurve
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? new RectOffset(5, 5, 5, 5)
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: new RectOffset(6, 6, 6, 6);
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var outTangent = pos + CurveTangentToCanvas(keys[k].outTangent).normalized * 40f;
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var inTangent = pos - CurveTangentToCanvas(keys[k].inTangent).normalized * 40f;
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var inTangentHitRect = new Rect(inTangent.x - 7f, inTangent.y - 7f, 14f, 14f);
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var outTangentHitrect = new Rect(outTangent.x - 7f, outTangent.y - 7f, 14f, 14f);
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// Draw
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if (state.showNonEditableHandles)
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{
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if (e.type == EventType.Repaint)
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{
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var selectedColor = (isCurrentlySelectedCurve && isCurrentlySelectedKeyframe)
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? settings.selectionColor
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: state.color;
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// Keyframe
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EditorGUI.DrawRect(offset.Remove(hitRect), selectedColor);
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// Tangents
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if (isCurrentlySelectedCurve && (!state.onlyShowHandlesOnSelection || (state.onlyShowHandlesOnSelection && isCurrentlySelectedKeyframe)))
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{
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Handles.color = selectedColor;
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if (k > 0 || state.loopInBounds)
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{
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Handles.DrawAAPolyLine(state.handleWidth, pos, inTangent);
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EditorGUI.DrawRect(offset.Remove(inTangentHitRect), selectedColor);
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}
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if (k < length - 1 || state.loopInBounds)
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{
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Handles.DrawAAPolyLine(state.handleWidth, pos, outTangent);
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EditorGUI.DrawRect(offset.Remove(outTangentHitrect), selectedColor);
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}
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}
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}
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}
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// Events
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if (state.editable)
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{
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// Keyframe move
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if (m_EditMode == EditMode.Moving && e.type == EventType.MouseDrag && isCurrentlySelectedCurve && isCurrentlySelectedKeyframe)
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{
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EditMoveKeyframe(animCurve, keys, k);
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}
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// Tangent editing
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if (m_EditMode == EditMode.TangentEdit && e.type == EventType.MouseDrag && isCurrentlySelectedCurve && isCurrentlySelectedKeyframe)
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{
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bool alreadyBroken = !(Mathf.Approximately(keys[k].inTangent, keys[k].outTangent) || (float.IsInfinity(keys[k].inTangent) && float.IsInfinity(keys[k].outTangent)));
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EditMoveTangent(animCurve, keys, k, m_TangentEditMode, e.shift || !(alreadyBroken || e.control));
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}
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// Keyframe selection & context menu
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if (e.type == EventType.MouseDown && rect.Contains(e.mousePosition))
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{
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if (hitRect.Contains(e.mousePosition))
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{
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if (e.button == 0)
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{
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SelectKeyframe(curve, k);
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m_EditMode = EditMode.Moving;
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e.Use();
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}
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else if (e.button == 1)
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{
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// Keyframe context menu
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var menu = new GenericMenu();
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menu.AddItem(new GUIContent("Delete Key"), false, (x) =>
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{
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var action = (MenuAction)x;
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var curveValue = action.curve.animationCurveValue;
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action.curve.serializedObject.Update();
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RemoveKeyframe(curveValue, action.index);
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m_SelectedKeyframeIndex = -1;
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SaveCurve(action.curve, curveValue);
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action.curve.serializedObject.ApplyModifiedProperties();
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}, new MenuAction(curve, k));
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menu.ShowAsContext();
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e.Use();
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}
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}
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}
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// Tangent selection & edit mode
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if (e.type == EventType.MouseDown && rect.Contains(e.mousePosition))
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{
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if (inTangentHitRect.Contains(e.mousePosition) && (k > 0 || state.loopInBounds))
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{
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SelectKeyframe(curve, k);
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m_EditMode = EditMode.TangentEdit;
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m_TangentEditMode = Tangent.In;
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e.Use();
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}
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else if (outTangentHitrect.Contains(e.mousePosition) && (k < length - 1 || state.loopInBounds))
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{
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SelectKeyframe(curve, k);
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m_EditMode = EditMode.TangentEdit;
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m_TangentEditMode = Tangent.Out;
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e.Use();
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}
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}
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// Mouse up - clean up states
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if (e.rawType == EventType.MouseUp && m_EditMode != EditMode.None)
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{
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m_EditMode = EditMode.None;
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}
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// Set cursors
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{
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EditorGUIUtility.AddCursorRect(hitRect, MouseCursor.MoveArrow);
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if (k > 0 || state.loopInBounds)
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EditorGUIUtility.AddCursorRect(inTangentHitRect, MouseCursor.RotateArrow);
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if (k < length - 1 || state.loopInBounds)
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EditorGUIUtility.AddCursorRect(outTangentHitrect, MouseCursor.RotateArrow);
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}
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}
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}
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Handles.color = Color.white;
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SaveCurve(curve, animCurve);
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}
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void OnGeneralUI(Rect rect)
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{
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var e = Event.current;
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// Selection
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if (e.type == EventType.MouseDown)
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{
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GUI.FocusControl(null);
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m_SelectedCurve = null;
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m_SelectedKeyframeIndex = -1;
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bool used = false;
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var hit = CanvasToCurve(e.mousePosition);
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float curvePickValue = CurveToCanvas(hit).y;
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// Try and select a curve
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foreach (var curve in m_Curves)
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{
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if (!curve.Value.editable || !curve.Value.visible)
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continue;
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var prop = curve.Key;
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var state = curve.Value;
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var animCurve = prop.animationCurveValue;
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float hitY = animCurve.length == 0
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? state.zeroKeyConstantValue
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: animCurve.Evaluate(hit.x);
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var curvePos = CurveToCanvas(new Vector3(hit.x, hitY));
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if (Mathf.Abs(curvePos.y - curvePickValue) < settings.curvePickingDistance)
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{
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m_SelectedCurve = prop;
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if (e.clickCount == 2 && e.button == 0)
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{
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// Create a keyframe on double-click on this curve
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EditCreateKeyframe(animCurve, hit, true, state.zeroKeyConstantValue);
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SaveCurve(prop, animCurve);
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}
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else if (e.button == 1)
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{
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// Curve context menu
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var menu = new GenericMenu();
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menu.AddItem(new GUIContent("Add Key"), false, (x) =>
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{
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var action = (MenuAction)x;
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var curveValue = action.curve.animationCurveValue;
|
|
action.curve.serializedObject.Update();
|
|
EditCreateKeyframe(curveValue, hit, true, 0f);
|
|
SaveCurve(action.curve, curveValue);
|
|
action.curve.serializedObject.ApplyModifiedProperties();
|
|
}, new MenuAction(prop, hit));
|
|
menu.ShowAsContext();
|
|
e.Use();
|
|
used = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (e.clickCount == 2 && e.button == 0 && m_SelectedCurve == null)
|
|
{
|
|
// Create a keyframe on every curve on double-click
|
|
foreach (var curve in m_Curves)
|
|
{
|
|
if (!curve.Value.editable || !curve.Value.visible)
|
|
continue;
|
|
|
|
var prop = curve.Key;
|
|
var state = curve.Value;
|
|
var animCurve = prop.animationCurveValue;
|
|
EditCreateKeyframe(animCurve, hit, e.alt, state.zeroKeyConstantValue);
|
|
SaveCurve(prop, animCurve);
|
|
}
|
|
}
|
|
else if (!used && e.button == 1)
|
|
{
|
|
// Global context menu
|
|
var menu = new GenericMenu();
|
|
menu.AddItem(new GUIContent("Add Key At Position"), false, () => ContextMenuAddKey(hit, false));
|
|
menu.AddItem(new GUIContent("Add Key On Curves"), false, () => ContextMenuAddKey(hit, true));
|
|
menu.ShowAsContext();
|
|
}
|
|
|
|
e.Use();
|
|
}
|
|
|
|
// Delete selected key(s)
|
|
if (e.type == EventType.KeyDown && (e.keyCode == KeyCode.Delete || e.keyCode == KeyCode.Backspace))
|
|
{
|
|
if (m_SelectedKeyframeIndex != -1 && m_SelectedCurve != null)
|
|
{
|
|
var animCurve = m_SelectedCurve.animationCurveValue;
|
|
var length = animCurve.length;
|
|
|
|
if (m_Curves[m_SelectedCurve].minPointCount < length && length >= 0)
|
|
{
|
|
EditDeleteKeyframe(animCurve, m_SelectedKeyframeIndex);
|
|
m_SelectedKeyframeIndex = -1;
|
|
SaveCurve(m_SelectedCurve, animCurve);
|
|
}
|
|
|
|
e.Use();
|
|
}
|
|
}
|
|
}
|
|
|
|
void SaveCurve(SerializedProperty prop, AnimationCurve curve)
|
|
{
|
|
prop.animationCurveValue = curve;
|
|
}
|
|
|
|
void Invalidate()
|
|
{
|
|
m_Dirty = true;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Keyframe manipulations
|
|
|
|
void SelectKeyframe(SerializedProperty curve, int keyframeIndex)
|
|
{
|
|
m_SelectedKeyframeIndex = keyframeIndex;
|
|
m_SelectedCurve = curve;
|
|
Invalidate();
|
|
}
|
|
|
|
void ContextMenuAddKey(Vector3 hit, bool createOnCurve)
|
|
{
|
|
SerializedObject serializedObject = null;
|
|
|
|
foreach (var curve in m_Curves)
|
|
{
|
|
if (!curve.Value.editable || !curve.Value.visible)
|
|
continue;
|
|
|
|
var prop = curve.Key;
|
|
var state = curve.Value;
|
|
|
|
if (serializedObject == null)
|
|
{
|
|
serializedObject = prop.serializedObject;
|
|
serializedObject.Update();
|
|
}
|
|
|
|
var animCurve = prop.animationCurveValue;
|
|
EditCreateKeyframe(animCurve, hit, createOnCurve, state.zeroKeyConstantValue);
|
|
SaveCurve(prop, animCurve);
|
|
}
|
|
|
|
if (serializedObject != null)
|
|
serializedObject.ApplyModifiedProperties();
|
|
|
|
Invalidate();
|
|
}
|
|
|
|
void EditCreateKeyframe(AnimationCurve curve, Vector3 position, bool createOnCurve, float zeroKeyConstantValue)
|
|
{
|
|
float tangent = EvaluateTangent(curve, position.x);
|
|
|
|
if (createOnCurve)
|
|
{
|
|
position.y = curve.length == 0
|
|
? zeroKeyConstantValue
|
|
: curve.Evaluate(position.x);
|
|
}
|
|
|
|
AddKeyframe(curve, new Keyframe(position.x, position.y, tangent, tangent));
|
|
}
|
|
|
|
void EditDeleteKeyframe(AnimationCurve curve, int keyframeIndex)
|
|
{
|
|
RemoveKeyframe(curve, keyframeIndex);
|
|
}
|
|
|
|
void AddKeyframe(AnimationCurve curve, Keyframe newValue)
|
|
{
|
|
curve.AddKey(newValue);
|
|
Invalidate();
|
|
}
|
|
|
|
void RemoveKeyframe(AnimationCurve curve, int keyframeIndex)
|
|
{
|
|
curve.RemoveKey(keyframeIndex);
|
|
Invalidate();
|
|
}
|
|
|
|
void SetKeyframe(AnimationCurve curve, int keyframeIndex, Keyframe newValue)
|
|
{
|
|
var keys = curve.keys;
|
|
|
|
if (keyframeIndex > 0)
|
|
newValue.time = Mathf.Max(keys[keyframeIndex - 1].time + settings.keyTimeClampingDistance, newValue.time);
|
|
|
|
if (keyframeIndex < keys.Length - 1)
|
|
newValue.time = Mathf.Min(keys[keyframeIndex + 1].time - settings.keyTimeClampingDistance, newValue.time);
|
|
|
|
curve.MoveKey(keyframeIndex, newValue);
|
|
Invalidate();
|
|
}
|
|
|
|
void EditMoveKeyframe(AnimationCurve curve, Keyframe[] keys, int keyframeIndex)
|
|
{
|
|
var key = CanvasToCurve(Event.current.mousePosition);
|
|
float inTgt = keys[keyframeIndex].inTangent;
|
|
float outTgt = keys[keyframeIndex].outTangent;
|
|
SetKeyframe(curve, keyframeIndex, new Keyframe(key.x, key.y, inTgt, outTgt));
|
|
}
|
|
|
|
void EditMoveTangent(AnimationCurve curve, Keyframe[] keys, int keyframeIndex, Tangent targetTangent, bool linkTangents)
|
|
{
|
|
var pos = CanvasToCurve(Event.current.mousePosition);
|
|
|
|
float time = keys[keyframeIndex].time;
|
|
float value = keys[keyframeIndex].value;
|
|
|
|
pos -= new Vector3(time, value);
|
|
|
|
if (targetTangent == Tangent.In && pos.x > 0f)
|
|
pos.x = 0f;
|
|
|
|
if (targetTangent == Tangent.Out && pos.x < 0f)
|
|
pos.x = 0f;
|
|
|
|
float tangent;
|
|
|
|
if (Mathf.Approximately(pos.x, 0f))
|
|
tangent = pos.y < 0f ? float.PositiveInfinity : float.NegativeInfinity;
|
|
else
|
|
tangent = pos.y / pos.x;
|
|
|
|
float inTangent = keys[keyframeIndex].inTangent;
|
|
float outTangent = keys[keyframeIndex].outTangent;
|
|
|
|
if (targetTangent == Tangent.In || linkTangents)
|
|
inTangent = tangent;
|
|
if (targetTangent == Tangent.Out || linkTangents)
|
|
outTangent = tangent;
|
|
|
|
SetKeyframe(curve, keyframeIndex, new Keyframe(time, value, inTangent, outTangent));
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Maths utilities
|
|
|
|
Vector3 CurveToCanvas(Keyframe keyframe)
|
|
{
|
|
return CurveToCanvas(new Vector3(keyframe.time, keyframe.value));
|
|
}
|
|
|
|
Vector3 CurveToCanvas(Vector3 position)
|
|
{
|
|
var bounds = settings.bounds;
|
|
var output = new Vector3((position.x - bounds.x) / (bounds.xMax - bounds.x), (position.y - bounds.y) / (bounds.yMax - bounds.y));
|
|
output.x = output.x * (m_CurveArea.xMax - m_CurveArea.xMin) + m_CurveArea.xMin;
|
|
output.y = (1f - output.y) * (m_CurveArea.yMax - m_CurveArea.yMin) + m_CurveArea.yMin;
|
|
return output;
|
|
}
|
|
|
|
Vector3 CanvasToCurve(Vector3 position)
|
|
{
|
|
var bounds = settings.bounds;
|
|
var output = position;
|
|
output.x = (output.x - m_CurveArea.xMin) / (m_CurveArea.xMax - m_CurveArea.xMin);
|
|
output.y = (output.y - m_CurveArea.yMin) / (m_CurveArea.yMax - m_CurveArea.yMin);
|
|
output.x = Mathf.Lerp(bounds.x, bounds.xMax, output.x);
|
|
output.y = Mathf.Lerp(bounds.yMax, bounds.y, output.y);
|
|
return output;
|
|
}
|
|
|
|
Vector3 CurveTangentToCanvas(float tangent)
|
|
{
|
|
if (!float.IsInfinity(tangent))
|
|
{
|
|
var bounds = settings.bounds;
|
|
float ratio = (m_CurveArea.width / m_CurveArea.height) / ((bounds.xMax - bounds.x) / (bounds.yMax - bounds.y));
|
|
return new Vector3(1f, -tangent / ratio).normalized;
|
|
}
|
|
|
|
return float.IsPositiveInfinity(tangent) ? Vector3.up : Vector3.down;
|
|
}
|
|
|
|
Vector3[] BezierSegment(Keyframe start, Keyframe end)
|
|
{
|
|
var segment = new Vector3[4];
|
|
|
|
segment[0] = CurveToCanvas(new Vector3(start.time, start.value));
|
|
segment[3] = CurveToCanvas(new Vector3(end.time, end.value));
|
|
|
|
float middle = start.time + ((end.time - start.time) * 0.333333f);
|
|
float middle2 = start.time + ((end.time - start.time) * 0.666666f);
|
|
|
|
segment[1] = CurveToCanvas(new Vector3(middle, ProjectTangent(start.time, start.value, start.outTangent, middle)));
|
|
segment[2] = CurveToCanvas(new Vector3(middle2, ProjectTangent(end.time, end.value, end.inTangent, middle2)));
|
|
|
|
return segment;
|
|
}
|
|
|
|
Vector3[] HardSegment(Keyframe start, Keyframe end)
|
|
{
|
|
var segment = new Vector3[3];
|
|
|
|
segment[0] = CurveToCanvas(start);
|
|
segment[1] = CurveToCanvas(new Vector3(end.time, start.value));
|
|
segment[2] = CurveToCanvas(end);
|
|
|
|
return segment;
|
|
}
|
|
|
|
float ProjectTangent(float inPosition, float inValue, float inTangent, float projPosition)
|
|
{
|
|
return inValue + ((projPosition - inPosition) * inTangent);
|
|
}
|
|
|
|
float EvaluateTangent(AnimationCurve curve, float time)
|
|
{
|
|
int prev = -1, next = 0;
|
|
for (int i = 0; i < curve.keys.Length; i++)
|
|
{
|
|
if (time > curve.keys[i].time)
|
|
{
|
|
prev = i;
|
|
next = i + 1;
|
|
}
|
|
else break;
|
|
}
|
|
|
|
if (next == 0)
|
|
return 0f;
|
|
|
|
if (prev == curve.keys.Length - 1)
|
|
return 0f;
|
|
|
|
const float kD = 1e-3f;
|
|
float tp = Mathf.Max(time - kD, curve.keys[prev].time);
|
|
float tn = Mathf.Min(time + kD, curve.keys[next].time);
|
|
|
|
float vp = curve.Evaluate(tp);
|
|
float vn = curve.Evaluate(tn);
|
|
|
|
if (Mathf.Approximately(tn, tp))
|
|
return (vn - vp > 0f) ? float.PositiveInfinity : float.NegativeInfinity;
|
|
|
|
return (vn - vp) / (tn - tp);
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|