增加makeRandom

removeChild和removeChildAt返回被删除实体

src/core/Entity.ts

@@ -230,7 +230,7 @@ export class Entity extends HashObject {
 	removeChild(child: Entity) {
 		const index = this.getChildIndex(child);
 		if (index >= 0) {
-			this.removeChildAt(index);
+			return this.removeChildAt(index);
 		}
 	}
 
@@ -240,9 +240,13 @@ export class Entity extends HashObject {
 	 */
 	removeChildAt(index: number) {
 		const child = this._children[index];
-		this._onChildRemoved(child);
 
-		this._children.splice(index, 1);
+		if(child){
+			this._onChildRemoved(child);
+			this._children.splice(index, 1);
+
+			return child;
+		}
 	}
 
 	/**

src/support/ObjectPool.ts

@@ -3,12 +3,12 @@
  *
  * 对象池
  */
- 
+
 let all = {};
 
-function getGroup(name: string){
+function getGroup(name: string) {
 	let group = all[name];
-	if(!group){
+	if (!group) {
 		throw new Error('group ' + name + ' not registered.');
 	}
 
@@ -21,7 +21,7 @@ function getGroup(name: string){
  * @param newFunc 实例化方法
  * @param initFunc 初始化方法
  */
-export function register(name: string, newFunc: Function, initFunc: Function){
+export function register(name: string, newFunc: () => any, initFunc: (instance: any, ...params) => void) {
 	all[name] = {name, newFunc, initFunc, pool: []};
 }
 
@@ -30,15 +30,15 @@ export function register(name: string, newFunc: Function, initFunc: Function){
  * @param name 池名称
  * @param params 参数
  */
-export function get(name: string, ...params){
+export function get(name: string, ...params) {
 	let group = getGroup(name);
 
 	let {newFunc, initFunc, pool} = group;
 
 	let instance;
-	if(pool.length == 0){
+	if (pool.length == 0) {
 		instance = newFunc();
-	}else{
+	} else {
 		instance = pool.pop();
 	}
 
@@ -52,7 +52,7 @@ export function get(name: string, ...params){
  * @param name 池名称
  * @param instance 实例
  */
-export function recycle(name: string, instance){
+export function recycle(name: string, instance) {
 	let group = getGroup(name);
 
 	group.pool.push(instance);

src/support/index.ts

@@ -14,4 +14,9 @@ export {default as LocalStorage} from './LocalStorage'
 export {TextStyle} from './TextStyle'
 
 export {default as EventEmitter} from './EventEmitter';
-export {default as dataCenter} from './DataCenter';
+export {default as dataCenter} from './DataCenter';
\ No newline at end of file
+
+import * as ObjectPool from './ObjectPool'
+export {
+	ObjectPool
+};
\ No newline at end of file

src/tools/math.ts

@@ -61,6 +61,15 @@ export function makeRandomInt(max: number, min: number = 0): number {
 	return Math.floor(Math.random() * (max - min)) + min;
 }
 
+/**
+ * 随机生成一个数
+ * @param max
+ * @param min
+ */
+export function makeRandom(max: number, min: number = 0): number {
+	return Math.random() * (max - min) + min;
+}
+
 /**
  * 打乱一个数组
  * @param arr