unity屏幕画线2D，3d

unity屏幕画线2D，3d

先设置canvas

lineRender基本保持不变

代码控制

 private void Start(){line = transform.GetComponent<LineRenderer>();//line.SetPosition(0,transform.position);//line.SetPosition(1,target.position);}public void Update(){if (Input.GetKey(KeyCode.W)){transform.localPosition+=Vector3.up;}if (Input.GetKey(KeyCode.S)){transform.localPosition+=Vector3.down;}if (Input.GetKey(KeyCode.A)){transform.localPosition+=Vector3.left;}if (Input.GetKey(KeyCode.D)){transform.localPosition+=Vector3.right;}JugePos(transform.position);}public void JugePos(Vector3 pos){if (pos != _startPos){_startPos = pos;paintPos.Add(pos);}line.positionCount = paintPos.Count;line.SetPositions(paintPos.ToArray());}