Curve Bezier

来源：互联网发布：iphone录制屏幕软件编辑：程序博客网时间：2024/05/16 05:58
using UnityEngine;using System.Collections;using System.Collections.Generic;public class DrawLine : MonoBehaviour {    // Use this for initialization    private List<Vector3> list;    private bool IsDraw = false;    private LineRenderer lineRenderer;    void Start () {        lineRenderer = GetComponent<LineRenderer>();    }         // Update is called once per frame    void Update()    {        if (Input.GetMouseButtonDown(0))        {            if (list == null)                list = new List<Vector3>();            list.Clear();            IsDraw = true;            lineRenderer.SetVertexCount(0);        }        if (Input.GetMouseButton(0))//记录划线点        {            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);            RaycastHit hit;            if (Physics.Raycast(ray, out hit, 1000))            {                Vector3 point = hit.point;                if (!hit.collider.name.Equals("Terrain"))                {                    return;                }                list.Add(point);                print(list.Count);            }        }        if (Input.GetMouseButtonUp(0))        {            IsDraw = false;        }       drawBezierCurve();      //  drawInputPointCurve();    }    private void drawBezierCurve()    {        if(IsDraw&&list.Count>0){            List<Vector3> bcList;            BezierCurve bc= new BezierCurve();            bcList = bc.CreateCurve(list);//  通过贝塞尔曲线 平滑划线点             lineRenderer.SetVertexCount(bcList.Count); //maxVertices < 65536 && maxIndices < 65536*3  点的密度 可以降低 太多会超过可设顶点数            for (int i = 0; i < bcList.Count; i++)            {                Vector3 v = bcList[i];                v += new Vector3(0, 0.5f, 0);                lineRenderer.SetPosition(i, v);            }        }    }    private void drawInputPointCurve()    {        if (IsDraw && list.Count > 0)        {            lineRenderer.SetVertexCount(list.Count);            for (int i = 0; i < list.Count; i++)            {                Vector3 v = list[i];                v += new Vector3(0, 0.5f, 0);                lineRenderer.SetPosition(i, v);            }        }    }}
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