diff --git a/history/008_frog3d_shape/src/main/java/com/gitee/drinkjava2/frog/brain/Cells3D.java b/history/008_frog3d_shape/src/main/java/com/gitee/drinkjava2/frog/brain/Cells3D.java
new file mode 100644
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+++ b/history/008_frog3d_shape/src/main/java/com/gitee/drinkjava2/frog/brain/Cells3D.java
@@ -0,0 +1,60 @@
+/*
+ * 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.brain;
+
+import com.gitee.drinkjava2.frog.Animal;
+import com.gitee.drinkjava2.frog.Env;
+
+/**
+ * Cells3D is 3D array of cells  
+ * 
+ * Cells3D 是一个三维动态数组，把animal中的cells list用三维数组的方式动态存放，以方便快速定位三维空间中的细胞
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class Cells3D {
+    private Animal animal;
+    public int[][][] cells = new int[Env.BRAIN_XSIZE][][]; // 为了节约内存，先只初始化三维数组的x维，另两维用到时再分配
+
+    public Cells3D(Animal animal) { 
+        this.animal=animal;
+    } 
+
+    /** check if cell exist at position (x,y,z) */
+    public boolean existCell(int x, int y, int z) {// 返回指定脑坐标的cell ，如果不存在，返回null
+        if (cells[x] == null || cells[x][y] == null)
+            return false;
+        return cells[x][y][z]>0; //arrayIndex为0时是空，为1时表示animal.cells[0];
+    }
+    
+    /** Get a cell at position (x,y,z), if not exist, return null */
+    public Cell getCell(int x, int y, int z) {// 返回指定脑坐标的cell ，如果不存在，返回null
+        if (cells[x] == null || cells[x][y] == null)
+            return null;
+        int arrayIndex=cells[x][y][z]; //arrayIndex为0时是空，为1时表示animal.cells[0];
+        if(arrayIndex<=0)
+            return null;
+        return animal.cells.get(arrayIndex-1);
+    }
+    
+    /** put a cell at position (x,y,z) */
+    public void putCell(Cell cell, int arrayIndex) {// 获取指定坐标的Cell，如果为空，则在指定位置新建Cell 
+        if (Animal.outBrainRange(cell.x, cell.y, cell.z))
+            return;
+        if (cells[cell.x] == null)
+            cells[cell.x] = new int[Env.BRAIN_YSIZE][];
+        if (cells[cell.x][cell.y] == null)
+            cells[cell.x][cell.y] = new int[Env.BRAIN_ZSIZE]; 
+        cells[cell.x][cell.y][cell.z] = arrayIndex; 
+    } 
+    
+}