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history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/objects/Food.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 static com.gitee.drinkjava2.frog.Env.ENV_HEIGHT;
+import static com.gitee.drinkjava2.frog.Env.ENV_WIDTH;
+import static com.gitee.drinkjava2.frog.Env.FOOD_QTY;
+import static com.gitee.drinkjava2.frog.Env.bricks;
+
+import com.gitee.drinkjava2.frog.Env;
+import com.gitee.drinkjava2.frog.util.RandomUtils;
+
+/**
+ * Food randomly scatter on Env
+ * 生成食物（静态食物或苍蝇，苍蝇如果Env中FOOD_CAN_MOVE=true,会向四个方向移动)
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class Food implements EnvObject {
+
+	@Override
+	public void build() {
+		if (!Env.FOOD_CAN_MOVE) {
+			for (int i = 0; i < FOOD_QTY; i++) // 生成食物
+				Env.setMaterial(RandomUtils.nextInt(ENV_WIDTH), RandomUtils.nextInt(ENV_HEIGHT), Material.FOOD);
+			return;
+		}
+		for (int i = 0; i < FOOD_QTY / 4; i++) { // 生成苍蝇1，苍蝇是NPC，没有智能
+			int x = RandomUtils.nextInt(ENV_WIDTH);
+			int y = RandomUtils.nextInt(ENV_HEIGHT);
+			Env.setMaterial(x, y, Material.FLY1);
+		}
+		for (int i = 0; i < FOOD_QTY / 4; i++) { // 生成苍蝇2
+			int x = RandomUtils.nextInt(ENV_WIDTH);
+			int y = RandomUtils.nextInt(ENV_HEIGHT);
+			Env.setMaterial(x, y, Material.FLY2);
+		}
+		for (int i = 0; i < FOOD_QTY / 4; i++) { // 生成苍蝇3
+			int x = RandomUtils.nextInt(ENV_WIDTH);
+			int y = RandomUtils.nextInt(ENV_HEIGHT);
+			Env.setMaterial(x, y, Material.FLY3);
+		}
+		for (int i = 0; i < FOOD_QTY / 4; i++) { // 生成苍蝇4
+			int x = RandomUtils.nextInt(ENV_WIDTH);
+			int y = RandomUtils.nextInt(ENV_HEIGHT);
+			Env.setMaterial(x, y, Material.FLY4);
+		}
+
+	}
+
+	@Override
+	public void destory() {
+		for (int i = 0; i < ENV_WIDTH; i++) {// 清除食物
+			for (int j = 0; j < ENV_HEIGHT; j++)
+				Env.clearMaterial(i, j, Material.ANY_FOOD);
+		}
+	}
+
+	@Override
+	public void active() {
+		if (!Env.FOOD_CAN_MOVE)// 如果食物不能移动
+			return;
+		if (RandomUtils.percent(96))// 用机率来调整食物(苍蝇)的速度
+			return;
+		for (int i = 1; i < ENV_WIDTH; i++) {// 水平移动FLY
+			for (int j = 1; j < ENV_HEIGHT; j++) {
+				if (bricks[i][j] == Material.FLY1) {
+					Env.setMaterial(i - 1, j, Material.FLY1);
+					Env.clearMaterial(i, j, Material.FLY1);
+				}
+				if (bricks[i][j] == Material.FLY2) {
+					Env.setMaterial(i, j - 1, Material.FLY2);
+					Env.clearMaterial(i, j, Material.FLY2);
+				}
+			}
+		}
+
+		for (int i = ENV_WIDTH - 2; i > 0; i--) {// 上下移动FLY
+			for (int j = ENV_HEIGHT - 2; j > 0; j--) {
+				if (bricks[i][j] == Material.FLY3) {
+					Env.setMaterial(i + 1, j, Material.FLY3);
+					Env.clearMaterial(i, j, Material.FLY3);
+				}
+				if (bricks[i][j] == Material.FLY4) {
+					Env.setMaterial(i, j + 1, Material.FLY4);
+					Env.clearMaterial(i, j, Material.FLY4);
+				}
+			}
+		}
+
+		for (int i = 0; i < ENV_WIDTH; i++) {
+			Env.clearMaterial(i, 0, Material.ANY_FOOD);
+			Env.clearMaterial(i, ENV_HEIGHT - 1, Material.ANY_FOOD);
+		}
+		for (int i = 0; i < ENV_HEIGHT; i++) {
+			Env.clearMaterial(0, i, Material.ANY_FOOD);
+			Env.clearMaterial(ENV_WIDTH - 1, i, Material.ANY_FOOD);
+		}
+	}
+
+	@Override
+	public void display() {  
+	}
+}