VR fps 显示

VR FPS 帧率显示

1. 找到你的VR Camera（或Center Eye Camera），创建 UI->Canvas
   设置Render Mode为 World Space；
   设置位置为(0，0，0.5)（push it out in front of the camera）
   设置Scale为(0.001，0.001，0.001)
2. 点击Canvas，创建UI->Text
3. Text加入下面的代码
   点击”F”键可以显示隐藏
   Note: It uses the new fancy Unity 5 Time.unscaledDeltaTime property !
   转载来自：http://talesfromtherift.com/vr-fps-counter/

   using UnityEngine;
   using UnityEngine.UI;
   
   // Display FPS on a Unity UGUI Text Panel
   // To use: Drag onto a game object with Text component
   //         Press 'F' key to toggle show/hide
   public class TextFPSCounter : MonoBehaviour
   {
       public Text text;
       public bool show = false;
       private const int targetFPS =
   #if UNITY_ANDROID // GEARVR
           60;
   #else
           75;
   #endif
       private const float updateInterval = 0.5f;
       private int framesCount;
       private float framesTime;
   
       void Start()
       {
           // no text object set? see if our gameobject has one to use
           if (text == null)
           {
               text = GetComponent<Text>();
           }
       }
   
       void Update()
       {
           if (Input.GetKeyDown(KeyCode.F))
           {
               show = !show;
           }
           // monitoring frame counter and the total time
           framesCount++;
           framesTime += Time.unscaledDeltaTime;
           // measuring interval ended, so calculate FPS and display on Text
           if (framesTime > updateInterval)
           {
               if (text != null)
               {
                   if (show)
                   {
                       float fps = framesCount / framesTime;
                       text.text = System.String.Format("{0:F2} FPS", fps);
                       text.color = (fps > (targetFPS - 5) ? Color.green :
                                    (fps > (targetFPS - 30) ? Color.yellow :
                                     Color.red));
                   }
                   else
                   {
                       text.text = "";
                   }
               }
               // reset for the next interval to measure
               framesCount = 0;
               framesTime = 0;
           }
       }
   }