这几天，做项目的时候需要用到绘制线的功能，我之前做过划线的功能，总体来说就是三种方式，一种是LineRenderer组件，第二种是GL绘制线，第三种就是Vectrosity插件，他可以绘制各种各图形，
1.首先来说一下LineRenderer组件划线的方式，他需要添加LineRenderer组件，也就需要创建空对象，还的创建Plane,在Plane上画线。
第一种方式：
#region ---- 划线
GameObject line;
LineRenderer wire;
public Material mline;
List<Vector3> p;//一条线上的点的位置
List<List<Vector3>> pos;//若干条线的点的位置
// Use this for initialization
void Start()
{
pos = new List<List<Vector3>>();//对线的初始化
}
// Update is called once per frame
void Update()
{
if (Input.GetMouseButtonDown(0))//判定是否是画的一条新线
{
p = new List<Vector3>();//初始化一条新线
pos.Add(p); //添加到线的数组
line = new GameObject();
wire = line.AddComponent<LineRenderer>();
wire.material = mline;
wire.useWorldSpace = false;
wire.SetWidth(0.1f, 0.1f);
wire.SetColors(Color.yellow, Color.yellow);
}
//画线
else if (Input.GetMouseButton(0))
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit))
{
//存储射线打到palne上面的点
p.Add(hit.point);
wire.SetVertexCount(p.Count);
//画线遍历
for (int i = 0; i < p.Count; i++)
{
wire.SetPosition(i, p[i]);
}
}
}
}
#endregion第二种方式：
//初始化
public void init ()
{
m_buildUpWall = new GameObject ();
m_pointList = new List<Vector3> ();
m_outPointList = new List<Vector3> ();
m_inPointList = new List<Vector3> ();
m_showLineList = new List<ShowLine> ();
m_showLinesGojb = new GameObject ();
m_wallList = new List<Wall> ();
m_showLinesGojb = new GameObject ();
m_lineRenderer = m_showLinesGojb.AddComponent<LineRenderer> ();
m_lineRenderer.SetWidth (0.01f, 0.01f);
// m_showLinesGojb.transform.SetParent (transform);
m_buildUpWall.AddComponent<MeshFilter> ();
m_buildUpWall.AddComponent<MeshRenderer> ();
m_buildUpWall.transform.SetParent (gameObject.transform);
m_buildUpWall.transform.localPosition = new Vector3 (-95.6f, -3.3f, -53.3f);
m_wallUpNormal = Vector3.up;
// m_layoutDesign = new GameObject ();
//transform.SetParent (GameObject.Find ("LayoutDesign").transform);
m_showPointSphereMat = Resources.Load ("Materials\\BuildwallPointSphere") as Material;
}
//画线
public void allOtherWallCloseHole ()
{
foreach (Wall wall in m_wallList) {
wall.wallInPlane.GetComponent<OpenHoleOnPlane> ().closeHoleNow ();
wall.wallOutPlane.GetComponent<OpenHoleOnPlane> ().closeHoleNow ();
}
}
//画线
public void insertNewPoint (Vector3 newPoint)
{
m_pointList.Add (newPoint);
GameObject showPointSphere = GameObject.CreatePrimitive (PrimitiveType.Sphere);
showPointSphere.transform.position = newPoint;
showPointSphere.transform.localScale = Vector3.one * DrawPointSphereRadius;
showPointSphere.GetComponent<Renderer> ().material = m_showPointSphereMat;
showPointSphere.transform.SetParent (m_showLinesGojb.transform);
Vector3 linePos = newPoint + LineRendererHigherThanGround * Vector3.up;
m_lineRenderer.SetVertexCount (m_pointList.Count);
m_lineRenderer.SetPosition (m_pointList.Count - 1, newPoint);
if (m_pointList.Count > 1) {
GameObject lengthText = new GameObject ();
float lineLength = (m_pointList [m_pointList.Count - 1] - m_pointList [m_pointList.Count - 2]).magnitude;
lengthText.transform.position = (m_pointList [m_pointList.Count - 1] + m_pointList [m_pointList.Count - 2]) / 2;
TextMesh textMesh = lengthText.AddComponent<TextMesh> ();
textMesh.text = lineLength.ToString("F");
textMesh.alignment = TextAlignment.Center;
textMesh.fontSize = 50;
textMesh.fontStyle = FontStyle.BoldAndItalic;
textMesh.color = Color.red;
lengthText.transform.localScale = Vector3.one * 0.04f;
lengthText.transform.Rotate(75f, 270f, 0);
lengthText.transform.SetParent (m_showLinesGojb.transform);
// m_lineRenderer.SetPosition (m_pointList.Count - 1, newPoint);
Vector3 lastPoint = m_pointList [m_pointList.Count - 1];
// ShowLine showLine = new ShowLine ();
// showLine.start = lastPoint;
// showLine.end = newPoint;
// m_showLineList.Add (showLine);
}
} 第一种方式，是绘制曲线，连续的线断，第二种是绘制直线，可画矩形。
GL绘制线断下节我跟大家分享，此次分享希望可以帮助大家
本文出自 “Unity_3D技术探讨” 博客，谢绝转载！
Unity实现绘制线断一 ————利用LineRenderer组件划线的两种方式
原文地址：http://myselfdream.blog.51cto.com/9944020/1794929
