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history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/objects/EarthQuake.java

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+/* 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;
+
+import java.awt.Color;
+import java.awt.Graphics;
+
+import com.gitee.drinkjava2.frog.Env;
+import com.gitee.drinkjava2.frog.Frog;
+import com.gitee.drinkjava2.frog.util.RandomUtils;
+
+/**
+ * EarthQuake make noise in a very tiny zone, after a while will hurt frogs on
+ * ground
+ * 
+ * 地震产生很小范围的声音，但是过一会后所有在地上没跳起的青蛙将受到伤害，能量被减除
+ * 
+ * 地震是听力/发音实验中的一个测试物体
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class EarthQuake implements EnvObject {
+    public static int activate = 0;
+
+    @Override
+    public void build() {
+    }
+
+    @Override
+    public void destory() {
+    }
+
+    @Override
+    public void active() {
+        if (activate == 0 && RandomUtils.percent(0.5f)) { // 有小机率启动地震
+            activate = 1;
+        }
+
+        if (activate > 0)
+            activate++; // 地震如果启动，强度就开始变大
+
+        if (activate > 50)
+            activate = 0; // 直到最大值后归零
+
+        if (activate > 0) {// 地震开始杀所有没跳在空中的青蛙
+            for (Frog frog : Env.frogs) {
+                if (frog.high == 0)
+                    frog.energy -=1000;
+            }
+        }
+    }
+
+    @Override
+    public void display() {
+        if (activate > 0) {//如果地震了，在地图上画出红框
+            Graphics g = Env.buffImg.getGraphics();
+            g.setColor(Color.RED);
+            g.drawRect(0, 0, Env.ENV_WIDTH - 1, Env.ENV_HEIGHT - 1);
+        }
+    }
+
+}