Question

我正在使用Windows Forms Applications编写自己的游戏。它应该是一个多人游戏。每个球员都可以控制自己的防守球以保持球在球场上，但问题是两个球员都无法同时按下控球。每当第二个玩家在第一个玩家的移动期间按下键时，第一个玩家的砖块停止。但是，如果他们按相同的温度按键，两块砖都会移动。我使用了 KeyDown 事件：

  private void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.W && one.BrickLocationY > 0)
        {
            one.BrickLocationY -= 17;
        }
        if (e.KeyCode == Keys.S && one.BrickLocationY + Brick.BrickHeight < screenHeight)
        {
            one.BrickLocationY += 17;
        }
        if (e.KeyCode == Keys.Up)
        {
            two.BrickLocationY -= 17;
        }
        if (e.KeyCode == Keys.Down && two.BrickLocationY + Brick.BrickHeight < screenHeight)
        {
            two.BrickLocationY += 17;
        }
        if (e.KeyCode == Keys.Escape)
        {
            Application.Exit();
        }
    }

好的，这可以让我上下移动砖块。如果我同时按下两个键，两个砖块都会按照想要的方向移动。砖块由定时器刻度触发的绘制事件绘制，其间隔设置为1。

  private void Form1_Paint(object sender, PaintEventArgs e)
    {
        e.Graphics.DrawEllipse(ellipsePen, x, y, ballSize, ballSize );
        e.Graphics.FillEllipse(Brushes.White ,x+1, y+1, ballSize, ballSize);

        e.Graphics.FillRectangle(Brushes.White, one.BrickLocationX+1, one.BrickLocationY+1, Brick.BrickWidth, Brick.BrickHeight);

        e.Graphics.FillRectangle(Brushes.White, two.BrickLocationX+1, two.BrickLocationY+1, Brick.BrickWidth, Brick.BrickHeight);
    }

我还尝试使用 KeyUp 和 KeyPress 的组合来完成此操作，但没有成功。我想到的唯一一件事就是穿砖，但不知道怎么做。我有什么方法可以在没有线程的情况下处理这样的多人游戏控制？

P.S。键盘能够同时处理多个按钮。

Answer 1

当KeyDown事件触发时，您需要检查每次按下哪些按钮。 Here是我在快速搜索该主题时发现的。

using System; 
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections.Generic;

namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
      this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(Form1_FormClosing);
      tm.Tick += new System.EventHandler(DoSomethingWithKeyboardInput);
      this.Load += new System.EventHandler(Form1_Load);
      textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(textbox1_KeyDown);
      textBox1.KeyUp += new System.Windows.Forms.KeyEventHandler(textbox1_KeyDown);
    }

    private Timer tm = new Timer();
    private List<System.Windows.Forms.Keys> MovementKeys = new List<System.Windows.Forms.Keys>();
    private _MyInputKeys MyInputKeys = new _MyInputKeys();

    private struct _MyInputKeys
    {
      public bool Jump;
      public bool Left;
      public bool Right;
    }

    private void Form1_FormClosing(object sender, System.Windows.Forms.FormClosingEventArgs e)
    {
      tm.Stop();
    }

    public void DoSomethingWithKeyboardInput(object sender, EventArgs e)
    {
      textBox1.Text = (MyInputKeys.Left ? "(left)" : "") + 
        (MyInputKeys.Right ? "(right)" : "") + (MyInputKeys.Jump ? "(jump)" : "");
    }

    private void Form1_Load(object sender, System.EventArgs e)
    {
      //define keys used for movement

      MovementKeys.Add(Keys.Up); //Jump ?
      MovementKeys.Add(Keys.Left); //Left Arrow - Move Left
      MovementKeys.Add(Keys.Right); //Rigth Arrow - Move Right
      tm.Interval = 50;
      tm.Start();
    }

    private void textbox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
    {
      if (MovementKeys.IndexOf(e.KeyCode) != -1)
      {
        e.Handled = true;
        MyInputKeys.Jump = IsKeyDown(Keys.Up);
        MyInputKeys.Left = IsKeyDown(Keys.Left);
        MyInputKeys.Right = IsKeyDown(Keys.Right);
      }
    }

    public static bool IsKeyDown(Keys key)
    {
      return (GetKeyState(Convert.ToInt16(key)) & 0X80) == 0X80;
    }
    /// <summary>
    ///  If the high-order bit is 1, the key is down; otherwise, it is up.
    ///  If the low-order bit is 1, the key is toggled. 
    ///  A key, such as the CAPS LOCK key, is toggled if it is turned on. 
    ///  The key is off and untoggled if the low-order bit is 0. 
    ///  A toggle key's indicator light (if any) on the keyboard will be on when 
    ///  the key is toggled, and off when the key is untoggled.
    /// </summary>
    /// <param name="nVirtKey"></param>
    [DllImport("user32.dll")]
    public extern static Int16 GetKeyState(Int16 nVirtKey);
  }
}

Answer 2

我相信你需要自己跟踪。基本上在按下键时你会识别w并认为它被保持直到按键释放w。与s键相同。

然后在您的运行循环中，您只需查找哪些键处于活动状态并在那里执行方向逻辑。

在多人游戏中处理多个键

2 个答案: