MREdustryXR/Assets/FrameWork/Scripts/LineManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LineManager : MonoSingleton<LineManager>
{
    private Vector2 Interval = new Vector2(0.05f, 0);
    private Vector2 offset;
    private void Start()
    {
        StartCoroutine(onDGTween());
    }
    IEnumerator onDGTween()
    {
        while(true)
        {
            yield return new WaitForSeconds(0.04f);
            if (line!=null)
            {
                offset -= Interval;
                line.materials[0].SetTextureOffset("_MainTex", offset);
                if(offset.x<=-1)
                {
                    offset = Vector2.zero;
                }

            }
            if(isStart)
            {

                if (initList != null && initList.Count > 0)
                {
                    Vector3 v3 = new Vector3(OpenXRCamera.Instance.head.position.x, initList[JGIndex].y, OpenXRCamera.Instance.head.position.z);
                    if (Vector3.Distance(v3, initList[JGIndex]) <= 0.2f)
                    {
                        JGIndex++;

                        if (JGIndex >= initList.Count)
                        {
                            JGIndex = initList.Count - 1;
                        }
                    }
                    RoadManager.Instance.setFX(initList[JGIndex]);

                }
            }
        }
    }
    public void stop()
    {
        if(RoadManager.Instance!=null&& line!=null)
        {

            JGIndex = 0;
            isStart = false;
            RoadManager.Instance.close();
            line.positionCount = 0;
        }
    }
    public bool isStart;
    List<Vector3> initList;
    public LineRenderer line;
    float MaxL;
    public void setRoad(List<Vector3> lineList)
    {
        JGIndex = 0;
        isStart = true;
        if (!line)
        {
            line =GameObject.Instantiate( WindowsManager.Instance.GetPrefab(WindowConfig.windowType.XunJian,"Line")).GetComponent<LineRenderer>();
        }
        lineList.Insert(0,OpenXRCamera.Instance.head.position);
        initList = lineList;
        for (int i = 0; i < lineList.Count; i++)
        {
            lineList[i] = new Vector3(lineList[i].x, OpenXRCamera.Instance.head.position.y-0.3f, lineList[i].z);
        }
        line.startWidth = 0.025f;
        line.endWidth = 0.025f;
        if(lineList.Count>2)
        {
            List<Vector3> v3 = new List<Vector3>();
            for (int i = 2; i < lineList.Count; i+=2)
            {
                v3.Add(lineList[i - 2]);
                v3.AddRange(DrawCurve(GetPos(lineList[i - 1],lineList[i-2]), lineList[i - 1], GetPos(lineList[i - 1], lineList[i])));
                v3.Add(lineList[i]);
            }
            lineList = v3;
        }

        line.positionCount = lineList.Count;
        line.SetPositions(lineList.ToArray());
        MaxL = 0;
        for (int i = 1; i < lineList.Count; i++)
        {
            MaxL+= Vector3.Distance(lineList[i - 1], lineList[i]);
        }

        line.materials[0].SetTextureScale("_MainTex", new Vector2(MaxL * 10*4, 1));
    }
    public Vector3 GetPos(Vector3 post1, Vector3 post2)
    {
        Vector3 pos = Vector3.zero;
        float dis = Vector3.Distance(post1, post2);//计算距离
        Vector3 vector = (post2 - post1).normalized; //向量单位化
        float rand =0.2f;//随机距离
        pos = vector * rand; //得到新坐标
        pos += post1; //使新的坐标点在 post1与 post2之间
        return pos;
    }
    private int _segmentNum = 10;
    List<Vector3> DrawCurve(Vector3 pos1, Vector3 pos2, Vector3 pos3)
    {
        List<Vector3> listPos = new List<Vector3>();
        for (int i = 1; i <= _segmentNum; i++)
        {
            float t = i / (float)_segmentNum;
            int nodeIndex = 0;
            Vector3 pixel = CalculateCubicBezierPoint(t, pos1,
                pos2, pos3);

            listPos.Add(pixel);

        }
        return listPos;
    }
    Vector3 CalculateCubicBezierPoint(float t, Vector3 p0, Vector3 p1, Vector3 p2)
    {
        float u = 1 - t;
        float tt = t * t;
        float uu = u * u;

        Vector3 p = uu * p0;
        p += 2 * u * t * p1;
        p += tt * p2;

        return p;
    }

    int JGIndex;
    void checkPos()
    {

    }
}