新增raycast射线

source/src/Physics/RaycastHit.ts

@@ -0,0 +1,57 @@
+module es {
+    export class RaycastHit {
+        /**
+         * 对撞机被射线击中
+         */
+        public collider: Collider;
+
+        /**
+         * 撞击发生时沿射线的距离。
+         */
+        public fraction: number = 0;
+
+        /**
+         * 从射线原点到碰撞点的距离
+         */
+        public distance: number = 0;
+
+        /**
+         * 世界空间中光线击中对撞机表面的点
+         */
+        public point: Vector2 = Vector2.zero;
+
+        /**
+         * 被射线击中的表面的法向量
+         */
+        public normal: Vector2 = Vector2.zero;
+
+        /**
+         * 用于执行转换的质心。使其接触的形状的位置。
+         */
+        public centroid: Vector2;
+
+        constructor(collider: Collider, fraction: number, distance: number, point: Vector2, normal: Vector2){
+            this.collider = collider;
+            this.fraction = fraction;
+            this.distance = distance;
+            this.point = point;
+            this.centroid = Vector2.zero;
+        }
+
+        public setValues(collider: Collider, fraction: number, distance: number, point: Vector2){
+            this.collider = collider;
+            this.fraction = fraction;
+            this.distance = distance;
+            this.point = point;
+        }
+
+        public reset(){
+            this.collider = null;
+            this.fraction = this.distance = 0;
+        }
+
+        public toString(){
+            return `[RaycastHit] fraction: ${this.fraction}, distance: ${this.distance}, normal: ${this.normal}, centroid: ${this.centroid}, point: ${this.point}`;
+        }
+    }
+}