diff --git a/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/util/CellUtil.java b/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/util/CellUtil.java
new file mode 100644
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--- /dev/null
+++ b/history/013_tree2/src/main/java/com/gitee/drinkjava2/frog/util/CellUtil.java
@@ -0,0 +1,60 @@
+/* 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.util;
+
+import static com.gitee.drinkjava2.frog.brain.Cells.GENE_NUMBERS;
+
+import java.util.ArrayList;
+
+import com.gitee.drinkjava2.frog.Animal;
+import com.gitee.drinkjava2.frog.brain.Cells;
+
+/**
+ * TreeUtil  
+ * 
+ * @author Yong Zhu
+ * @since 013
+ */
+public class CellUtil {
+    
+    public static void createCellsFromGene(Animal a) {//根据基因生成细胞参数  
+        long geneMask = 1;
+        for (int g = 0; g < GENE_NUMBERS; g++) {//动物有多条基因，一条基因控制一维细胞参数，最多有64维，也就是最多有64条基因
+            ArrayList<Integer> gene = a.genes.get(g);
+            int xLayer = Cells.xLayer[g];
+            if (xLayer > -1) { //如果xLayer不为-1，表示此基因分布在平面上，此时使用4叉树在平面上分裂加速!!!!
+                Tree4Util.knockNodesByGene(gene);//根据基因，把要敲除的4叉树节点作个标记
+                for (int i = 0; i < Tree4Util.NODE_QTY; i++) {//再根据敲剩下的4叉树keep标记生成细胞参数
+                    if (Tree4Util.keep[i] > 0) {
+                        int[] node = Tree4Util.TREE4[i];
+                        if (node[0] == 1) {//如果node边长为1，即不可以再分裂了，就在2维空间对间数组的位置把当前基因geneMask置1
+                            a.cells[xLayer][node[1]][node[2]] = a.cells[xLayer][node[1]][node[2]] | geneMask; //在相应的细胞处把细胞参数位置1
+                        }
+                    }
+                }
+                geneMask <<= 1;
+            } else {//否则使用8叉树在三维空间分裂!!!!
+                Tree8Util.knockNodesByGene(gene);//根据基因，把要敲除的8叉树节点作个标记
+                for (int i = 0; i < Tree8Util.NODE_QTY; i++) {//再根据敲剩下的8叉树keep标记生成细胞参数
+                    if (Tree8Util.keep[i] > 0) {
+                        int[] node = Tree8Util.TREE8[i];
+                        if (node[0] == 1) {//如果node边长为1，即不可以再分裂了，就在三维空间对间数组的位置把当前基因geneMask置1
+                            a.cells[node[1]][node[2]][node[3]] = a.cells[node[1]][node[2]][node[3]] | geneMask; //在相应的细胞处把细胞参数位置1
+                        }
+                    }
+                }
+                geneMask <<= 1;
+            }
+
+        }
+    }
+    
+}