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游戏人生Silverlight(3) - 打苍蝇[Silverlight 2.0(c#)]


作者:webabcd


介绍
使用 Silverlight 2.0(c#) 开发一个打苍蝇的游戏


玩法
用鼠标控制瞄准镜的移动,鼠标左键开火


在线DEMO



思路
1、苍蝇的移动轨迹用一个简单的公式计算,即正弦波。正弦波的公式:y = A * sin(ωx + φ)
2、苍蝇控件使用MVP(Model - View - Presenter)模式开发,其目的只是为了说明如何在Silverlight中应用MVP模式


关键代码
1、苍蝇控件的Model
IFlyModel.cs
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace YYFly.Model
{
        public interface IFlyModel
        {
                /// <summary>
                /// 让一只苍蝇开始飞
                /// </summary>
                void Start();
                /// <summary>
                /// 让一只苍蝇停止飞
                /// </summary>
                void Stop();
                /// <summary>
                /// 计分方法
                /// </summary>
                void Score();

                /// <summary>
                /// 苍蝇改变位置所触发的事件
                /// </summary>
                event EventHandler<FlyEventArgs> FlyChanging;
        }
}
 
FlyModel.cs
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace YYFly.Model
{
        public class FlyModel : IFlyModel
        {
                private DispatcherTimer timer; // 改变苍蝇位置的计时器
                private SineWave sineWave; // 苍蝇的运动轨迹(正弦波)的参数
                private FlyEventArgs evt; // 苍蝇的位置参数
                private Random random;    
                private double minX = -100, minY = 40, maxY = 300, minZ = 0.1, maxZ = 0.5;

                private static readonly object objLock = new object();

                public FlyModel()
                {
                        timer = new DispatcherTimer();
                        timer.Tick += new EventHandler(timer_Tick);
                        timer.Interval = new TimeSpan(0, 0, 0, 0, 33);
                }

                void InitData()
                {
                        random = new Random();

                        sineWave = new SineWave
                        {
                                A = random.Next(40, 60),
                                OffsetY = random.Next((int)minY, (int)maxY),
                                Omega = 1d / random.Next(20, 50),
                                Phi = random.Next((int)minX * 2, (int)minX),
                        };

                        evt = new FlyEventArgs()
                        {
                                X = minX,
                                Z = (minZ + maxZ) / 2,
                                Z_Out = Convert.ToBoolean(random.Next(0, 2))
                        };
                }

                void timer_Tick(object sender, EventArgs e)
                {
                        evt.X += Singleton<Scorer>.Instance.Level * 1.5;
                        evt.Y = sineWave.OffsetY + sineWave.A * Math.Sin(sineWave.Omega * evt.X + sineWave.Phi);

                        if (evt.Z_Out)
                        {
                                if (evt.Z < maxZ)
                                        evt.Z += random.Next(0, 3) / 200d;
                                else
                                        evt.Z_Out = false;
                        }
                        else
                        {
                                if (evt.Z > minZ)
                                        evt.Z -= random.Next(0, 3) / 200d;
                                else
                                        evt.Z_Out = true;
                        }

                        OnFlyChanging(evt);
                }

                public void Start()
                {
                        InitData();
                        timer.Start();
                }

                public void Stop()
                {
                        timer.Stop();
                }

                public void Score()
                {
                        try
                        {
                                lock (objLock)
                                {
                                        Singleton<Scorer>.Instance.Score += 1;
                                        Singleton<Scorer>.Instance.Level = (int)Singleton<Scorer>.Instance.Score / 10 + 1;
                                }
                        }
                        finally {}
                }

                public event EventHandler<FlyEventArgs> FlyChanging;
                protected virtual void OnFlyChanging(FlyEventArgs e)
                {
                        EventHandler<FlyEventArgs> handler = FlyChanging;
                        if (handler != null)
                                handler(this, e);
                }
        }
}
 
2、苍蝇控件的View
IFlyView.cs
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace YYFly.View
{
        public interface IFlyView
        {
                /// <summary>
                /// 更新苍蝇的位置
                /// </summary>
                /// <param name="x">X 轴坐标</param>
                /// <param name="y">Y 轴坐标</param>
                /// <param name="z">Z 轴方向上的缩放比例</param>
                void Update(double x, double y, double z);

                /// <summary>
                /// 苍蝇开始飞的事件处理器
                /// </summary>
                event EventHandler Start;
                /// <summary>
                /// 苍蝇停止飞的事件处理器
                /// </summary>
                event EventHandler Stop;
                /// <summary>
                /// 打死苍蝇后的计分事件
                /// </summary>
                event EventHandler Score;
        }
}
 
Fly.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace YYFly.View
{
        public partial class Fly : UserControl, IFlyView
        {
                public Fly()
                {
                        InitializeComponent();

                        this.Loaded += new RoutedEventHandler(Fly_Loaded);
                }

                void Fly_Loaded(object sender, RoutedEventArgs e)
                {
                        
                }

                /// <summary>
                /// 更新苍蝇的位置
                /// </summary>
                /// <param name="x">X 轴坐标</param>
                /// <param name="y">Y 轴坐标</param>
                /// <param name="z">Z 轴方向上的缩放比例</param>
                public void Update(double x, double y, double z)
                {
                        fly.SetValue(Canvas.LeftProperty, x);
                        fly.SetValue(Canvas.TopProperty, y);
                        st.ScaleX = st.ScaleY = z;
                }

                /// <summary>
                /// 打到苍蝇后
                /// </summary>
                /// <param name="sender"></param>
                /// <param name="e"></param>
                private void fly_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
                {
                        if (aniWing.GetCurrentState() != ClockState.Stopped)
                        {
                                aniFlyDisappear.Begin();

                                OnScore();
                        }
                }

                /// <summary>
                /// 苍蝇消失的动画结束后
                /// </summary>
                /// <param name="sender"></param>
                /// <param name="e"></param>
                private void aniFlyDisappear_Completed(object sender, EventArgs e)
                {
                        OnStop();
                }

                /// <summary>
                /// 初始化苍蝇的位置
                /// </summary>
                public void InitPosition()
                {
                        fly.SetValue(Canvas.LeftProperty, -300d);
                }

                public event EventHandler Start;
                public void OnStart()
                {
                        InitPosition();

                        aniFlyDisappear.Stop();

                        if (Start != null)
                                Start(this, EventArgs.Empty);
                }

                public event EventHandler Stop;
                public void OnStop()
                {
                        InitPosition();

                        if (Stop != null)
                                Stop(this, EventArgs.Empty);
                }

                public event EventHandler Score;
                public void OnScore()
                {
                        if (Score != null)
                                Score(this, EventArgs.Empty);
                }
        }
}
 
3、苍蝇控件的Presenter
FlyPresenter.cs
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using YYFly.Model;
using YYFly.View;

namespace YYFly.Presenter
{
        /// <summary>
        /// Model - View - Presenter 模式中的 Presenter
        /// </summary>
        public class FlyPresenter
        {
                public FlyPresenter(IFlyView flyView, IFlyModel flyModel)
                {
                        FlyView = flyView;
                        FlyModel = flyModel;

                        FlyView.Start += new EventHandler(FlyView_Start);
                        FlyView.Stop += new EventHandler(FlyView_Stop);
                        flyView.Score += new EventHandler(flyView_Score);

                        FlyModel.FlyChanging += new EventHandler<FlyEventArgs>(FlyModel_FlyChanging);
                }

                void FlyView_Start(object sender, EventArgs e)
                {
                        FlyModel.Start();
                }

                void FlyView_Stop(object sender, EventArgs e)
                {
                        FlyModel.Stop();
                }

                void flyView_Score(object sender, EventArgs e)
                {
                        FlyModel.Score();
                }

                void FlyModel_FlyChanging(object sender, FlyEventArgs e)
                {
                        FlyView.Update(e.X, e.Y, e.Z);
                }

                public IFlyView FlyView { get; set; }
                public IFlyModel FlyModel { get; set; }
        }
}