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history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/organ/snake/SnakeEyes.java

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+/*
+ * Copyright 2018 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.organ.snake;
+
+import com.gitee.drinkjava2.frog.Animal;
+import com.gitee.drinkjava2.frog.Env;
+import com.gitee.drinkjava2.frog.organ.frog.FrogEyes;
+
+/**
+ * SnakeEyes can only see 4 direction's frog
+ * 
+ * 蛇的眼睛看不到food, 只能看到青蛙，也就是说它把青蛙当成食物
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class SnakeEyes {
+
+	public static class SeeUp extends FrogEyes.SeeUp {// 只能看到上方青蛙
+		private static final long serialVersionUID = 1L;
+
+		@Override
+		public void initOrgan(Animal a) { // 仅在Snake生成时这个方法会调用一次
+			if (!initilized) {
+				initilized = true;
+				seeDistance = 8;
+			}
+		}
+
+		@Override
+		public void active(Animal a) {
+			for (int i = 1; i < seeDistance; i++)
+				if (Env.foundFrogOrOutEdge(a.x, a.y + i)) {
+					activeCells(a, 30);
+					seeSomeThing = true;
+					return;
+				}
+			seeSomeThing = false;
+		}
+	}
+
+	public static class SeeDown extends SeeUp {// 只能看到下方青蛙
+		private static final long serialVersionUID = 1L;
+
+		@Override
+		public void active(Animal a) {
+			for (int i = 1; i < seeDistance; i++)
+				if (Env.foundFrogOrOutEdge(a.x, a.y - i)) {
+					activeCells(a, 30);
+					seeSomeThing = true;
+					return;
+				}
+			seeSomeThing = false;
+		}
+	}
+
+	public static class SeeLeft extends SeeUp {// 只能看到左方青蛙
+		private static final long serialVersionUID = 1L;
+
+		@Override
+		public void active(Animal a) {
+			for (int i = 1; i < seeDistance; i++)
+				if (Env.foundFrogOrOutEdge(a.x - i, a.y)) {
+					activeCells(a, 30);
+					seeSomeThing = true;
+					return;
+				}
+			seeSomeThing = false;
+		}
+	}
+
+	public static class SeeRight extends SeeUp {// 只能看到右方青蛙
+		private static final long serialVersionUID = 1L;
+
+		@Override
+		public void active(Animal a) {
+			for (int i = 1; i < seeDistance; i++)
+				if (Env.foundFrogOrOutEdge(a.x + i, a.y)) {
+					activeCells(a, 30);
+					seeSomeThing = true;
+					return;
+				}
+			seeSomeThing = false;
+		}
+	}
+
+}