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);  //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");
    }
}