其实挺简单的，拿个物体移动，把物体移动的坐标添加到 Line 的坐标里 ， 如果再 把每次创建的 Line 存储起来， 可以再做个删除键 ， VR 更不用说了 同理
下面是代码
using UnityEngine; using System.Collections; using GoWorldUnity3D; using Valve.VR.Extras; using Valve.VR; /// <summary> /// 画笔画线 /// </summary> public class Line : MonoBehaviour { public LineRenderer line; //LineRenderer private LineRenderer lineRenderer; //定义一个Vector3,用来存储鼠标点击的位置 private Vector3 position; //用来索引端点 private int index = 0; //端点数 private int LengthOfLineRenderer = 0; //LineRenderer个数标志 private int LineIndex = 1; //画笔颜色 public Color color; //画笔大小 public float Size; private ListAttr list; //private ListAttr pos; private ListAttr rgb; private SteamVR_Behaviour_Pose pose; public SteamVR_Action_Boolean teleport = SteamVR_Input.GetBooleanAction("InteractUI"); /// <summary> /// 是否在白板上画 /// </summary> public bool lineState = false; public Vector3 startPos; public Vector3 endPos; public float y; void Start() { list = new ListAttr(); rgb = new ListAttr(); CommonData.materialLine = line; if (CommonData.isVR) { pose = GameObject.Find("RightHand").GetComponent<SteamVR_Behaviour_Pose>(); // Debug.LogError("AAAAAAAAAAAAAAAAA" + CommonData.materialLine.name); } CommonData.materialLine = line; if (gameObject.name== "TheBrush") CommonData.materialLine = line; } void LineParameterSetting() { //设置材质 // lineRenderer.material = new Material(Shader.Find("Particles/Additive")); //设置颜色 lineRenderer.startColor = color; lineRenderer.endColor = color; float width = Size /100-0.007f; //设置宽度 lineRenderer.startWidth = width; lineRenderer.endWidth = width; Debug.Log("---------------------"+color); } private void OnEnable() { CommonData.materialLine = line; if (CommonData.isVR) GetComponent<MeshRenderer>().materials[0].color = color; } void Update() { // Debug.Log(gameObject.name); if (!CommonData.isVR) { #region PCLine //鼠标左击 if (Input.GetMouseButton(0)) { if (Input.GetMouseButtonDown(0)) { // lineRenderer = new GameObject("Line" + LineIndex).AddComponent<LineRenderer>(); lineRenderer = GameObject.Instantiate(line); lineRenderer.gameObject.SetActive(true); lineRenderer.name = ("Line" + LineIndex); LineParameterSetting(); LineIndex++; color = lineRenderer.startColor; int r = (int)(color.r*255); int b = (int)(color.b*255); int g = (int)(color.g*255); // Debug.Log(r + "------" + g + "------" + b); rgb.append(r); rgb.append(g); rgb.append(b); rgb.append((int)Size); } //将鼠标点击的屏幕坐标转换为世界坐标，然后存储到position中 position = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 1f)); if(lineState) { //lineRenderer.transform.SetParent( GameObject.Find("Board").transform); //lineRenderer.transform.localPosition = new Vector3(-1.8f, -2f, -20f); lineRenderer.transform.localEulerAngles = GameObject.Find("WriteBoard").transform.localEulerAngles; position = new Vector3(position.x, position.y, startPos.z); position.x = position.x < startPos.x ? startPos.x : position.x; position.x = position.x > endPos.x ? endPos.x : position.x; position.y = position.y < startPos.y ? startPos.y : position.y; position.y = position.y > endPos.y ? endPos.y : position.y; } //端点数+1 LengthOfLineRenderer++; //设置线段的端点数 lineRenderer.positionCount = LengthOfLineRenderer; } //连续绘制线段 while (index < LengthOfLineRenderer) { //两点确定一条直线，所以我们依次绘制点就可以形成线段了 lineRenderer.SetPosition(index, position); index++; ListAttr pos = new ListAttr(); pos.append(position.x); pos.append(position.y); pos.append(position.z); // pos.append(0); list.append(pos); } if (Input.GetMouseButtonUp(0) && index != 0) { GoWorldUnity3D.GoWorld.ClientOwner.CallServer("SyncBrushData", list, rgb); list.RemoveAll(); rgb.RemoveAll(); index = 0; LengthOfLineRenderer = 0; } if (Input.GetKeyDown(KeyCode.Delete)) { if (LineIndex > 0) { Destroy(GameObject.Find("Line" + --LineIndex)); } } #endregion } else { #region VRLine if (pose == null) pose = GameObject.Find("RightHand").GetComponent<SteamVR_Behaviour_Pose>(); if (teleport.GetStateDown(pose.inputSource)) { Debug.Log("按下右扳机"); lineRenderer = GameObject.Instantiate(line); lineRenderer.gameObject.SetActive(true); lineRenderer.name = ("Line" + LineIndex); LineParameterSetting(); LineIndex++; Debug.Log(color.r + "------" + color.b + "------" + color.g); int r = (int)(color.r * 255); int b = (int)(color.b * 255); int g = (int)(color.g * 255); rgb.append(r); rgb.append(g); rgb.append(b); } if (teleport.GetState(pose.inputSource)) { LengthOfLineRenderer++; lineRenderer.positionCount = LengthOfLineRenderer; position = transform.position; if (lineState) { position = new Vector3(position.x, position.y, startPos.z); position.x = position.x < startPos.x ? startPos.x : position.x; position.x = position.x > endPos.x ? endPos.x : position.x; position.y = position.y < startPos.y ? startPos.y : position.y; position.y = position.y > endPos.y ? endPos.y : position.y; } while (index < LengthOfLineRenderer) { lineRenderer.SetPosition(index, position); index++; ListAttr pos = new ListAttr(); pos.append(position.x); pos.append(position.y); pos.append(position.z); list.append(pos); } } if (teleport.GetStateUp(pose.inputSource)) { GoWorldUnity3D.GoWorld.ClientOwner.CallServer("SyncBrushData", list, rgb); list.RemoveAll(); rgb.RemoveAll(); index = 0; LengthOfLineRenderer = 0; } if (Input.GetKeyDown(KeyCode.Delete)) { if (LineIndex > 0) { Destroy(GameObject.Find("Line" + --LineIndex)); } } #endregion } } }