85 lines
2.5 KiB
C#
85 lines
2.5 KiB
C#
using UnityEngine;
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namespace NWH.Common.Utility
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{
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public static class AnimationCurveExtensions
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{
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/// <summary>
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/// Smooths out scripting-generated AnimationCurve.
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/// Runs only in editor.
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/// </summary>
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public static AnimationCurve MakeSmooth(this AnimationCurve inCurve)
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{
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AnimationCurve outCurve = new AnimationCurve();
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for (int i = 0; i < inCurve.keys.Length; i++)
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{
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float inTangent = 0;
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float outTangent = 0;
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bool intangentSet = false;
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bool outtangentSet = false;
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Vector2 point1;
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Vector2 point2;
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Vector2 deltapoint;
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Keyframe key = inCurve[i];
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if (i == 0)
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{
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inTangent = 0;
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intangentSet = true;
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}
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if (i == inCurve.keys.Length - 1)
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{
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outTangent = 0;
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outtangentSet = true;
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}
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if (!intangentSet)
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{
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point1.x = inCurve.keys[i - 1].time;
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point1.y = inCurve.keys[i - 1].value;
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point2.x = inCurve.keys[i].time;
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point2.y = inCurve.keys[i].value;
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deltapoint = point2 - point1;
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inTangent = deltapoint.y / deltapoint.x;
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}
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if (!outtangentSet)
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{
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point1.x = inCurve.keys[i].time;
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point1.y = inCurve.keys[i].value;
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point2.x = inCurve.keys[i + 1].time;
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point2.y = inCurve.keys[i + 1].value;
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deltapoint = point2 - point1;
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outTangent = deltapoint.y / deltapoint.x;
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}
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key.inTangent = inTangent;
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key.outTangent = outTangent;
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outCurve.AddKey(key);
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}
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return outCurve;
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}
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/// <summary>
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/// Generates array from an AnimationCurve.
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/// </summary>
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public static float[] GenerateCurveArray(this AnimationCurve self, int resolution = 256)
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{
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float[] returnArray = new float[resolution];
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for (int j = 0; j < resolution; j++)
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{
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returnArray[j] = self.Evaluate(j / (float)resolution);
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}
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return returnArray;
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}
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}
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} |