C#贪吃蛇游戏实现分析

代码2：

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

namespace EngorgeSerpent
{
 /// <summary>
 /// 地图
 /// </summary>
 class Map
 {
 /// <summary>
 /// 节点数组
 /// </summary>
 private List<List<Node>> _nodes;
 private int RowCount;
 private int ComsCount;
 private Color bgColor = Color.FromArgb(224, 224, 224);
 private System.Windows.Forms.Control MapPanel;
 Graphics g;
 /// <summary>
 /// 地图背景色 和node中背景色一致
 /// </summary>
 public Color BgColor
 {
  get { return bgColor; }
 }
 /// <summary>
 /// 构造方法
 /// </summary>
 /// <param name="rows">行数</param>
 /// <param name="coms">列数</param>
 public Map(int rows, int coms, System.Windows.Forms.Control c)
 {
  RowCount = rows;
  ComsCount = coms;
  MapPanel = c;
  g = c.CreateGraphics();
  _nodes = new List<List<Node>>();
  for (int i = 0; i < rows; i++)//行
  {
  List<Node> index = new List<Node>();
  for (int j = 0; j < coms; j++)
  {
   Node node = new Node(j, i);
   index.Add(node);
  }
  _nodes.Add(index);
  }
 }

 /// <summary>
 /// 构造方法
 /// </summary>
 /// <param name="rows">行数</param>
 /// <param name="coms">列数</param>
 /// <param name="width">节点宽度</param> 
 public Map(int rows, int coms, int width, System.Windows.Forms.Control c)
 {
  RowCount = rows;
  ComsCount = coms;
  MapPanel = c;
  g = c.CreateGraphics();
  _nodes = new List<List<Node>>();
  for (int i = 0; i < coms; i++)//行
  {
  List<Node> index = new List<Node>();
  for (int j = 0; j < rows; j++)
  {
   Node node = new Node(j, i, width);
   index.Add(node);
  }
  _nodes.Add(index);
  }
 }

 /// <summary>
 /// 重新加载地图
 /// </summary>
 public void ResetMap()
 {
  for (int i = 0; i < ComsCount; i++)//行
  {
  for (int j = 0; j < RowCount; j++)
  {
   Node node = GetNode(i, j);
   node.IsPass = true;
   node.IsFood = false;  
  }
  }
 }
 /// <summary>
 /// 获得节点
 /// </summary>
 /// <param name="x"></param>
 /// <param name="y"></param>
 /// <returns></returns>
 public Node GetNode(int x, int y)
 {
  return _nodes[y][x];
 }

 /// <summary>
 /// 设置食物
 /// </summary>
 public void SetFood()
 {
  SolidBrush brush = null;
  int _x, _y;
  Random r = new Random();
  while (true)
  {
  _x = r.Next(0, RowCount);
  _y = r.Next(0, ComsCount);
  if (_nodes[_x][_y].IsPass)
  {
   break;
  }
  }
  Node nodeindex = _nodes[_x][_y];
  nodeindex.SetFood(true);
  brush = new SolidBrush(nodeindex.FoodColor);
  RectangleF[] rects = { new RectangleF(nodeindex.X * nodeindex.Width, nodeindex.Y * nodeindex.Width, nodeindex.Width, nodeindex.Width) };
  g.FillRectangles(brush, rects);
 }

 /// <summary>
 /// 设置障碍物
 /// </summary>
 /// <param name="list"></param>
 public void SetHinder(List<Node> list)
 {
  SolidBrush brush = null;
  RectangleF[] rects = new RectangleF[list.Count];
  for (int i = 0; i < list.Count; i++)
  {
  Node _node = list[i];
  _node.SetHinder(true);
  _node.IsPass = false;
  if (brush == null)
  {
   brush = new SolidBrush(_node.HinderColor);
  }
  RectangleF r = new RectangleF(_node.X * _node.Width, _node.Y * _node.Width, _node.Width, _node.Width);
  rects[i] = r;
  }
  g.FillRectangles(brush, rects);
 }

 /// <summary>
 /// 设置边界
 /// </summary>
 public void SetBorder()
 {
  //通过计算得出边界的个数是2（x+y-2）个方格

  SolidBrush brush = null;
  int borders = 2 * (ComsCount + RowCount - 2);
  RectangleF[] rects = new RectangleF[borders];
  int indexcount = 0;
  //添加顶部方格进rects列表中
  for (int i = 0; i < RowCount; i++)
  {
  Node _node = _nodes[i][0];
  _node.SetHinder(true);
  if (brush == null)
  {
   brush = new SolidBrush(_node.HinderColor);
  }
  RectangleF r = new RectangleF(_node.X * _node.Width, _node.Y * _node.Width, _node.Width, _node.Width);
  rects[indexcount] = r;
  indexcount++;
  }
  //添加底部方格进rects列表中
  for (int i = 0; i < RowCount; i++)
  {
  Node _node = _nodes[i][ComsCount - 1];
  _node.SetHinder(true);

  RectangleF r = new RectangleF(_node.X * _node.Width, _node.Y * _node.Width, _node.Width, _node.Width);
  rects[indexcount] = r;
  indexcount++;
  }
  //添加左侧方格进列表，因为左侧最上面以及最下面的两个方格已经添加进去，这里不需要重复添加
  for (int i = 1; i < ComsCount - 1; i++)
  {
  Node _node = _nodes[0][i];
  _node.SetHinder(true);
  RectangleF r = new RectangleF(_node.X * _node.Width, _node.Y * _node.Width, _node.Width, _node.Width);
  rects[indexcount] = r;
  indexcount++;
  }
  //添加右侧方格进列表，因为右侧最上面以及最下面两个方格已经添加进去，这里不需要重复添加
  for (int i = 1; i < ComsCount - 1; i++)
  {
  Node _node = _nodes[RowCount - 1][i];
  _node.SetHinder(true);
  RectangleF r = new RectangleF(_node.X * _node.Width, _node.Y * _node.Width, _node.Width, _node.Width);
  rects[indexcount] = r;
  indexcount++;
  }
  g.FillRectangles(brush, rects);
 }
 }
}

								 
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