Time.deltaTime更正

ArcadeRigidbody优化

source/src/Math/Vector2.ts

@@ -66,6 +66,19 @@ module es {
             return result;
         }
 
+        /**
+         * 
+         * @param value1 
+         * @param value2 
+         * @returns 
+         */
+        public static multiplyScaler(value1: Vector2, value2: number) {
+            let result = new Vector2(0, 0);
+            result.x = value1.x * value2;
+            result.y = value1.x * value2;
+            return result;
+        }
+
         /**
          *
          * @param value1
@@ -206,6 +219,17 @@ module es {
             return this;
         }
 
+        /**
+         * 
+         * @param value 
+         * @returns 
+         */
+        public multiplyScaler(value: number): Vector2 {
+            this.x *= value;
+            this.y *= value;
+            return this;
+        }
+
         /**
          * 从当前Vector2减去一个Vector2
          * @param value 要减去的Vector2