From a76d6d625f43ea2eee7eef37f2af5a7024e9c833 Mon Sep 17 00:00:00 2001
From: 13766800364 <13766800364@qq.com>
Date: Thu, 9 Oct 2025 16:10:53 +0800
Subject: [PATCH] Add File

---
 .../drinkjava2/frog/objects/EnvObject.java    | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/objects/EnvObject.java

diff --git a/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/objects/EnvObject.java b/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/objects/EnvObject.java
new file mode 100644
index 0000000..e925825
--- /dev/null
+++ b/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/objects/EnvObject.java
@@ -0,0 +1,29 @@
+/* Copyright 2018-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
+ * applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+ * OF ANY KIND, either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ */
+package com.gitee.drinkjava2.frog.objects;
+
+/**
+ * EnvObject means some virtual object in Env
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class EnvObject {
+
+    public void build() {
+    } // 在Env中创建本身物体，只在每屏测试前调用一次
+
+    public void destory() {
+    }// 从Env中清除本身物体，只在每屏测试完成后调用一次
+
+    public void active(int screen, int step) {
+    } // 每个步长（即时间最小单位)都会调用一次这个方法, 两个参数分别是当前屏数和当前步长数
+}