modify the calculateDeltaTime

cocos · Apr 4, 2019 · 056d9bc · 056d9bc
1 parent ff386d9
commit 056d9bc
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Showing 2 changed files with 6 additions and 7 deletions.
diff --git a/cocos2d/core/CCDirector.js b/cocos2d/core/CCDirector.js
@@ -214,9 +214,8 @@ cc.Director.prototype = {
     /**
      * calculates delta time since last time it was called
      */
-    calculateDeltaTime: function () {
-        var now = performance.now();
-
+    calculateDeltaTime: function (now) {
+        if (!now) now = performance.now();
         this._deltaTime = (now - this._lastUpdate) / 1000;
         if (CC_DEBUG && (this._deltaTime > 1))
             this._deltaTime = 1 / 60.0;
@@ -925,14 +924,14 @@ cc.Director.prototype = {
 
         this._totalFrames++;
 
-    } : function () {
+    } : function (curTime) {
         if (this._purgeDirectorInNextLoop) {
             this._purgeDirectorInNextLoop = false;
             this.purgeDirector();
         }
         else if (!this.invalid) {
             // calculate "global" dt
-            this.calculateDeltaTime();
+            this.calculateDeltaTime(curTime);
 
             // Update
             if (!this._paused) {

diff --git a/cocos2d/core/CCGame.js b/cocos2d/core/CCGame.js
@@ -630,15 +630,15 @@ var game = {
 
         debug.setDisplayStats(config.showFPS);
 
-        callback = function () {
+        callback = function (now) {
             if (!self._paused) {
                 self._intervalId = window.requestAnimFrame(callback);
                 if (!CC_JSB && !CC_RUNTIME && frameRate === 30) {
                     if (skip = !skip) {
                         return;
                     }
                 }
-                director.mainLoop();
+                director.mainLoop(now);
             }
         };