Unity Gizmos可视化辅助工具

所有gizmo绘制需要在脚本的OnDrawGizmos或OnDrawGizmosSelected里函数完成。

OnDrawGizmos在每帧调用。所有在OnDrawGizmos中渲染的gizmos都是可见的。

OnDrawGizmosSelected仅在脚本附加的物体被选择时被调用。

1. Gizmos.DrawLine

从obj1到obj2之间画一条绿色的线。

 using UnityEngine;
 using System.Collections;
 public class DrawLineText : MonoBehaviour {

     public GameObject obj1;
     public GameObject obj2;

     void OnDrawGizmos()
     {
         Gizmos.color = Color.green;
         Gizmos.DrawLine( obj1.transform.position , obj2.transform.position );
     }
 }

2.Gizmos.DrawRay

从obj向上画一条长度为10的射线

 using UnityEngine;
 using System.Collections;
 public class DrawRayText : MonoBehaviour {

     public GameObject obj;
     void OnDrawGizmos()
     {
         Gizmos.color = Color.gray;
         Gizmos.DrawRay(obj.transform.position, Vector3.up * );  //10 是长度
     }
 }

3.Gizmos.DrawCube

在（0,1,0）处画一个（1,1,1）大小的立方体

 using UnityEngine;
 using System.Collections;
 public class DrawCubeText : MonoBehaviour {

       void OnDrawGizmos()
     {
         Gizmos.color = Color.red;
         Gizmos.DrawCube(Vector3.up , Vector3.one);
     }
 }

4.Gizmos.DrawIcon

在（0,0,0）处生成一个名字为002IMgZLzy6Mro7r94Ka2&690.jpg的Icon ，此图片要放到Assets下的  Gizmos文件夹里才行。

 using UnityEngine;
 using System.Collections;
 public class DrawIconText : MonoBehaviour {

       void OnDrawGizmos()
     {
         Gizmos.DrawIcon(Vector3.zero , "002IMgZLzy6Mro7r94Ka2&690.jpg");
     }
 }