今天有點時間，才記起來上一次寫的畫線框，接着上一節畫線，我們這節來看一下GL畫線
直接上代碼
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class joint{
public Vector3 org;
public Vector3 end;
}
public class example : MonoBehaviour {
Event e;
private Vector3 orgPos;
private Vector3 endPos;
private bool canDrawLines = false;
ArrayList posAL;
ArrayList temppos;
public Material lineMaterial;
public List <Vector3> Pos = new List<Vector3> ();
void Start()
{
temppos=new ArrayList();
posAL=new ArrayList();
}
void Update()
{
if(Input.GetMouseButtonUp(0))
{
canDrawLines = true;
}
if(e.type!=null &canDrawLines)
{
if(e.type == EventType.MouseDown)
{
orgPos=Input.mousePosition;
}
if(e.type==EventType.MouseUp)
{
endPos=Input.mousePosition;
Pos.Add (endPos);
for (int i = 0; i < Pos.Count-1; i++) {
Vector3 p = Pos [i];
}
GLDrawLine (orgPos, endPos);
orgPos = endPos;
}
}
}
void GLDrawLine(Vector3 beg ,Vector3 end )
{
if(!canDrawLines)
return;
GL.PushMatrix ();
GL.LoadOrtho ();
beg.x=beg.x/Screen.width;
end.x=end.x/Screen.width;
beg.y=beg.y/Screen.height;
end.y=end.y/Screen.height;
joint tmpJoint = new joint();
tmpJoint.org=beg;
tmpJoint.end=end;
posAL.Add(tmpJoint);
lineMaterial.SetPass( 0 );
GL.Begin( GL.LINES );
GL.Color( new Color(1,1,1,1f) );
for(int i= 1;i<posAL.Count;i++)
{
joint tj =(joint)posAL[i];
Vector3 tmpBeg = tj.org;
Vector3 tmpEnd=tj.end;
GL.Vertex3( tmpBeg.x,tmpBeg.y,tmpBeg.z );
GL.Vertex3( tmpEnd.x,tmpEnd.y,tmpEnd.z );
}
GL.End();
GL.PopMatrix ();
}
void OnGUI()
{
e = Event.current;
if(GUI.Button(new Rect(150,0,100,50),"End Lines"))
{
ClearLines();
}
if (GUI.Button (new Rect(10,5,100,50),"Read")) {
Read ();
}
}
void ClearLines()
{
canDrawLines = false;
posAL.Clear();
Pos.Clear ();
}
void OnPostRender() {
GLDrawLine(orgPos,endPos);
}
public void Read()
{
for (int i = 0; i < Pos.Count; i++) {
Debug.Log (Pos [i]);
}
}
這就是GL畫線，但是有一個問題是GL畫線不能改變線的寬細，它是默認的，要想讓他變寬，可以考慮每兩點之間畫雙線，兩天線之間用圖片填充。
希望大家能用的到