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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[CreateAssetMenu(fileName = "RootMotion Data")]
// 单个动画的root motion
public class RootMotionData : ScriptableObject
{
public string animationName;
public int frameCount;
public List<Vector3> positionList;
public float animationLength;
public float fps;
public Vector3 GetRootMotion(float normalTime)
{
normalTime = Mathf.Clamp(normalTime, 0, 1);
int prevFrame = (int)Mathf.Floor((frameCount - 1) * normalTime) % frameCount;
int nextFrame = (int)Mathf.Ceil((frameCount - 1) * normalTime) % frameCount;
float frameRate = 1 / fps;
float t = (normalTime * animationLength - prevFrame * frameRate) / frameRate;
return Vector3.Lerp(positionList[prevFrame], positionList[nextFrame], t);
}
/// <summary>
/// 返回移动量，加到当前position上
/// </summary>
/// <param name="prevTime">上一次计算root motion的单位时间</param>
/// <param name="curTime">本次取root motion的时间</param>
/// <returns></returns>
public Vector3 GetRootMotionDistance(float prevTime, float curTime)
{
Vector3 p1 = GetRootMotion(prevTime);
Vector3 p2 = GetRootMotion(curTime);
return p2 - p1;
}
}
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