Made a GameLoop helper module to make game class cleaner

2026-06-28 16:20:43 +08:00 · 2013-07-09 21:23:48 -04:00
parent 7b7021bf09
commit a31865142c
4 changed files with 57 additions and 72 deletions
@@ -0,0 +1,33 @@
+window.GameLoop = (function (window) {
+    var requestAnimFrame = (function () {
+            return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000/60); };
+        })(),
+        _currentTime = new Date().getTime(),
+        _accumulator = 0.0,
+
+        start = function (renderCallback, updateCallback) {
+            loop();
+
+            function loop () {
+                requestAnimFrame(loop);
+
+                var newTime = new Date().getTime(), frameTime = newTime - _currentTime;
+                if (frameTime  > 250) {
+                    frameTime = 250;
+                }
+                _currentTime = newTime;
+                _accumulator += frameTime;
+
+                while (_accumulator >= 15) {
+                    updateCallback();
+                    _accumulator -= 15;
+                }
+
+                renderCallback();
+            }
+        };
+
+    return {
+        start: start
+    };
+}) (window);