导入leg插件，完成腿部动画
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace FIMSpace.AnimationTools
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{
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public static class AnimationGenerateUtils
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{
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#region Curve Utilties
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public static AnimationCurve ReduceKeyframes(AnimationCurve curve, float maxError)
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{
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Keyframe[] keys = curve.keys;
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int i = 1;
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while (keys.Length > 2 && i < keys.Length - 1)
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{
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Keyframe[] tempK = new Keyframe[keys.Length - 1];
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int t = 0;
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for (int k = 0; k < keys.Length; k++)
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if (i != k) { tempK[t] = new Keyframe(keys[k].time, keys[k].value, keys[k].inTangent, keys[k].outTangent); t++; }
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AnimationCurve tempCurve = new AnimationCurve();
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tempCurve.keys = tempK;
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float eval = Mathf.Abs(tempCurve.Evaluate(keys[i].time) - keys[i].value);
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float checkBack = keys[i].time + (keys[i - 1].time - keys[i].time) * 0.5f;
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float checkForward = keys[i].time + (keys[i + 1].time - keys[i].time) * 0.5f;
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float previous = Mathf.Abs(tempCurve.Evaluate(checkBack) - curve.Evaluate(checkBack));
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float next = Mathf.Abs(tempCurve.Evaluate(checkForward) - curve.Evaluate(checkForward));
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if (eval < maxError && previous < maxError && next < maxError) keys = tempK; else i++;
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}
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return new AnimationCurve(keys);
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}
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public static void LoopCurve(ref AnimationCurve curve, bool averageBoth = false, float? endTime = null)
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{
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float key0Val = 0f;
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if (curve.keys.Length > 0) key0Val = curve.keys[0].value;
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if (endTime == null) // Loop start and last keyframe
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{
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if (curve.keys.Length == 0)
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{
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curve.AddKey(new Keyframe(0f, key0Val));
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curve.AddKey(new Keyframe(1f, key0Val));
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return;
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}
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else if (curve.keys.Length == 1)
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{
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curve.AddKey(new Keyframe(Mathf.Max(1f, curve.keys[0].time + 0.5f), key0Val));
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return;
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}
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float targetVal = key0Val;
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if (averageBoth) targetVal = Mathf.Lerp(key0Val, curve.keys[curve.keys.Length - 1].value, 0.5f);
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curve.MoveKey(0, new Keyframe(curve.keys[0].time, targetVal));
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curve.MoveKey(curve.keys.Length - 1, new Keyframe(curve.keys[curve.keys.Length - 1].time, targetVal));
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}
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else // Shifting last key near to end or adding new key
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{
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float maxTime = endTime.Value;
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if (curve.keys.Length == 0)
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{
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curve.AddKey(new Keyframe(0f, key0Val));
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curve.AddKey(new Keyframe(maxTime, key0Val));
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return;
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}
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else if (curve.keys.Length == 1)
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{
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curve.AddKey(new Keyframe(maxTime, key0Val));
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return;
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}
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float targetVal = key0Val;
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if (averageBoth) targetVal = Mathf.Lerp(key0Val, curve.keys[curve.keys.Length - 1].value, 0.5f);
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var key = curve.keys[curve.keys.Length - 1];
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float lastKeyTime = key.time;
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if (lastKeyTime != maxTime)
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{
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if (lastKeyTime < maxTime)
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{
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if (maxTime - lastKeyTime < maxTime * 0.1f)
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{
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lastKeyTime = maxTime;
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}
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}
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}
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curve.MoveKey(0, new Keyframe(curve.keys[0].time, targetVal));
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curve.MoveKey(curve.keys.Length - 1, new Keyframe(lastKeyTime, targetVal));
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}
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}
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public static void DistrubuteCurveOnTime(ref AnimationCurve curve, float startTime, float endTime)
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{
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float curveStart = curve.keys[0].time;
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float curveEnd = curve.keys[curve.keys.Length - 1].time;
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Keyframe[] evalKeys = new Keyframe[curve.keys.Length];
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curve.keys.CopyTo(evalKeys, 0);
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AnimationCurve refCurve = new AnimationCurve(evalKeys);
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while (curve.keys.Length > 0)
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{
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curve.RemoveKey(curve.keys.Length - 1);
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}
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for (int k = 0; k < refCurve.keys.Length; k++)
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//for (int k = refCurve.keys.Length - 1; k >= 0; k--)
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//for (int k = refCurve.keys.Length - 1; k >= 0; k--)
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{
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Keyframe src = refCurve.keys[k];
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Keyframe newK = src;
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newK.time = Mathf.Lerp(startTime, endTime, Mathf.InverseLerp(curveStart, curveEnd, src.time));
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curve.AddKey(newK);
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}
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//for (int k = 0; k < curve.keys.Length; k++)
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//{
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// Keyframe src = curve.keys[k];
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// Keyframe newK = src;
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// newK.time = Mathf.Lerp(startTime, endTime, Mathf.InverseLerp(curve.keys[0].time, curve.keys[curve.keys.Length - 1].time, src.time));
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// curve.MoveKey(k, newK);
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//}
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}
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#endregion
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#region Coords Utilities
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public static Quaternion EnsureQuaternionContinuity(Quaternion latestRot, Quaternion targetRot, bool normalize = false)
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{
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Quaternion flipped = new Quaternion(-targetRot.x, -targetRot.y, -targetRot.z, -targetRot.w);
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Quaternion midQ = new Quaternion
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(
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Mathf.LerpUnclamped(latestRot.x, targetRot.x, 0.5f),
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Mathf.LerpUnclamped(latestRot.y, targetRot.y, 0.5f),
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Mathf.LerpUnclamped(latestRot.z, targetRot.z, 0.5f),
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Mathf.LerpUnclamped(latestRot.w, targetRot.w, 0.5f)
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);
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Quaternion midQFlipped = new Quaternion
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(
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Mathf.LerpUnclamped(latestRot.x, flipped.x, 0.5f),
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Mathf.LerpUnclamped(latestRot.y, flipped.y, 0.5f),
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Mathf.LerpUnclamped(latestRot.z, flipped.z, 0.5f),
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Mathf.LerpUnclamped(latestRot.w, flipped.w, 0.5f)
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);
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float angle = Quaternion.Angle(latestRot, midQ);
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float angleTreshold = Quaternion.Angle(latestRot, midQFlipped);
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if (normalize)
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return angleTreshold < angle ? flipped.normalized : targetRot.normalized;
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else
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return angleTreshold < angle ? flipped : targetRot;
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}
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#endregion
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#region Animator Extra Utilities
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#if UNITY_EDITOR
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static UnityEditor.Animations.AnimatorController _ikHelperAnimController = null;
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public static UnityEditor.Animations.AnimatorController GetStoredHumanoidIKPreviousController { get { return _ikHelperAnimController; } }
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//static RuntimeAnimatorController _ikHelperAnimRController = null;
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#endif
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/// <summary>
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/// Applying unity humanoid IK on the scene preview after sampling animation
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/// for better precision for animations editing
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/// </summary>
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public static void UpdateHumanoidIKPreview(Animator mecanim, AnimationClip clip, float time, bool restoreAnimator = true)
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{
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#if UNITY_EDITOR
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if (clip != null)
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{
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#region Initialize temporary animator controller
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if (_ikHelperAnimController == null)
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{
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_ikHelperAnimController = new UnityEditor.Animations.AnimatorController();
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_ikHelperAnimController.name = "ADesigner-Helper-Controller";
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}
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if (_ikHelperAnimController.layers.Length == 0)
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{
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var state = new UnityEditor.Animations.AnimatorState();
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state.motion = null;
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state.iKOnFeet = true;
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state.name = "0";
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UnityEditor.Animations.AnimatorControllerLayer layer = new UnityEditor.Animations.AnimatorControllerLayer();
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layer.name = "0";
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layer.iKPass = true;
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layer.stateMachine = new UnityEditor.Animations.AnimatorStateMachine();
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layer.stateMachine.AddState(state, Vector3.zero);
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layer.stateMachine.defaultState = state;
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_ikHelperAnimController.AddLayer(layer);
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}
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#endregion
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_ikHelperAnimController.layers[0].stateMachine.defaultState.motion = clip;
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RuntimeAnimatorController preController = mecanim.runtimeAnimatorController;
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var preUpd = mecanim.updateMode;
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mecanim.updateMode = AnimatorUpdateMode.UnscaledTime;
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mecanim.Rebind();
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mecanim.runtimeAnimatorController = (RuntimeAnimatorController)_ikHelperAnimController;
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mecanim.Play("0", 0, time / clip.length);
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mecanim.Update(0f);
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mecanim.updateMode = preUpd;
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if (restoreAnimator) mecanim.runtimeAnimatorController = preController;
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}
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#endif
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}
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#endregion
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}
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}
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