From d21fe11d01aef7a5add9a32e7326e58bd90e29b3 Mon Sep 17 00:00:00 2001
From: 13766800364 <13766800364@qq.com>
Date: Thu, 9 Oct 2025 16:07:47 +0800
Subject: [PATCH] Add File

---
 .../drinkjava2/frog/brain/organ/Eye.java      | 99 +++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 history/002_first_eye/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java

diff --git a/history/002_first_eye/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java b/history/002_first_eye/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java
new file mode 100644
index 0000000..043df1d
--- /dev/null
+++ b/history/002_first_eye/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java
@@ -0,0 +1,99 @@
+/*
+ * 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.github.drinkjava2.frog.brain.organ;
+
+import com.github.drinkjava2.frog.Frog;
+import com.github.drinkjava2.frog.brain.Cell;
+import com.github.drinkjava2.frog.brain.Input;
+import com.github.drinkjava2.frog.brain.Organ;
+import com.github.drinkjava2.frog.egg.Zone;
+import com.github.drinkjava2.frog.env.Env;
+
+/**
+ * Eye is an organ can see environment, and active brain cells which inputs are
+ * located in eye range
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class Eye {
+
+	private static boolean hasFood(int x, int y) {
+		return x >= 0 && y >= 0 && x < Env.ENV_WIDTH && y < Env.ENV_HEIGHT && Env.foods[x][y];
+	}
+
+	/** First eye can only see if food nearby at 4 directions */
+	public static void act(Frog f, Organ eye) {// 第一个眼睛只能观察上、下、左、右四个方向有没有食物 
+		float qRadius = eye.radius / 4;
+		float q3Radius = (float) (eye.radius * .75);
+		Zone seeUp = new Zone(eye.x, eye.y + q3Radius, qRadius);
+		Zone seeDown = new Zone(eye.x, eye.y - q3Radius, qRadius);
+		Zone seeLeft = new Zone(eye.x - q3Radius, eye.y, qRadius);
+		Zone seeRight = new Zone(eye.x + q3Radius, eye.y, qRadius);
+
+		boolean seeFood = false;
+		boolean foodAtUp = false;
+		boolean foodAtDown = false;
+		boolean foodAtLeft = false;
+		boolean foodAtRight = false;
+
+		int seeDist = 10;
+		for (int i = 1; i < seeDist; i++)
+			if (hasFood(f.x, f.y + i)) {
+				seeFood = true;
+				foodAtUp = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDist; i++)
+			if (hasFood(f.x, f.y - i)) {
+				seeFood = true;
+				foodAtDown = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDist; i++)
+			if (hasFood(f.x - i, f.y)) {
+				seeFood = true;
+				foodAtLeft = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDist; i++)
+			if (hasFood(f.x + i, f.y)) {
+				seeFood = true;
+				foodAtRight = true;
+				break;
+			}
+
+		if (seeFood)
+			for (Cell cell : f.cells) {
+				if (cell.energy < 100)
+					for (Input input : cell.inputs) {
+						if (input.nearby(eye)) {
+							if (foodAtUp && input.nearby(seeUp)) {
+								input.cell.energy += 30;
+							}
+							if (foodAtDown && input.nearby(seeDown)) {
+								input.cell.energy += 30;
+							}
+							if (foodAtLeft && input.nearby(seeLeft)) {
+								input.cell.energy += 30;
+							}
+							if (foodAtRight && input.nearby(seeRight)) {
+								input.cell.energy += 30;
+							}
+						}
+					}
+			}
+	}
+
+}