Move to Renderer V2

packages/utils/src/motion/Callback.ts

@@ -0,0 +1,30 @@
+import { Motion } from './Motion';
+
+export class Callback extends Motion
+{
+    protected _callback: Function;
+
+    constructor(k: Function)
+    {
+        super(null);
+
+        this._callback = k;
+    }
+
+    public get running(): boolean
+    {
+        return (this._running && !!this._callback);
+    }
+
+    public tick(k: number): void
+    {
+        super.tick(k);
+
+        if(this._callback)
+        {
+            this._callback();
+
+            this._callback = null;
+        }
+    }
+}