如何让游戏背景滚动起来

[wxz280973534]

最近打算做一个飞机游戏练练手
现在遇到一个问题,就是当游戏开始的时候背景必须从上到下不断地滚动,
我的游戏界面是600*700
所以我打算用两张一摸一样的图片A,B(大小也是600*700)作为背景,
原理就是把A设置成背景,当A向下滚动时(这个时候窗口的上面就会有一小段是空的对吧),这时候让B图片也从上到下滚动,来填补这个空缺,
这样当A图片滚完一个周期,即A图从屏幕消失后,B图又可以占据整个窗口,然后接着向下滚动,这时候的A图也就相当于前面的B,紧跟在B的后面.
以此来达到图片滚动的效果.
现在不知道有没有其他比较好的方法可以代替这个方法,感觉这个方法很浪费资源

[yangqidong]

不需要两个图片啊
Graphics.DrawImage有几个重载方法是可以指定绘制图片的哪一部分的
完全可以把图片上半部分绘制在窗体下半部，而把图片 下半部画在窗体上半部

[teerhu]

友情帮顶

[wzuomin]

呵呵，ls所说即是。

[wzuomin]

随便写了段代码，lz参考一下吧.不知道有没有价值,呵呵.

Public Class Form1

    Private backImage As Bitmap = Nothing
    Private tmr As Timer = Nothing
    Private h As Integer

    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        If tmr IsNot Nothing Then tmr.Stop()
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.SetStyle(ControlStyles.OptimizedDoubleBuffer, True)
        Me.FormBorderStyle = Windows.Forms.FormBorderStyle.Fixed3D
        Me.MaximizeBox = False
        Me.MinimizeBox = False

        Dim ofd As New OpenFileDialog
        ofd.Filter = "bmp,jpg|*.bmp;*.jpg"
        If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then
            backImage = Image.FromFile(ofd.FileName)
            Me.Size = backImage.Size
            tmr = New Timer
            AddHandler tmr.Tick, AddressOf tmrTick
            tmr.Interval = 10
            tmr.Start()
        Else
            Me.Close()
        End If
    End Sub

    Private Sub tmrTick(ByVal sender As Object, ByVal e As EventArgs)
        If backImage IsNot Nothing Then
            Using img As New Bitmap(Me.Width, Me.Height)
                Using g As Graphics = Graphics.FromImage(img)
                    g.DrawImage(backImage, New Rectangle(0, h, Me.Width, Me.Height - h), 0, 0, backImage.Width, backImage.Height - h, GraphicsUnit.Pixel)
                    h += 1
                    If h < Me.Height Then g.DrawImage(backImage, New Rectangle(0, 0, Me.Width, h), 0, backImage.Height - h, backImage.Width, h, GraphicsUnit.Pixel) Else h = 0
                End Using
                Me.CreateGraphics.DrawImage(img, 0, 0)
            End Using
        End If
    End Sub

End Class

[wzuomin]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    { 
        private Bitmap backImage = null;
        private Timer tmr = null;
        private Int32 h = 0;

        public Form1()
        {
            InitializeComponent();

            this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            this.FormBorderStyle = FormBorderStyle.Fixed3D;
            this.MaximizeBox = false;
            this.MinimizeBox = false;

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "bmp,jpg|*.bmp;*.jpg";
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                backImage =(Bitmap ) Image.FromFile(ofd.FileName);
                this.Size = backImage.Size;
                tmr = new Timer();
                tmr.Tick += tmrTick;
                tmr.Interval = 10;
                tmr.Start();
            }
            else
            {
                this.Close();
            } 
        }

        private void tmrTick(object sender, EventArgs e)
        {
            if (backImage != null)
            {
                using (Bitmap img = new Bitmap(this.Width, this.Height))
                {
                    using (Graphics g = Graphics.FromImage(img))
                    {
                        g.DrawImage(backImage, new Rectangle(0, h, this.Width, this.Height - h), 0, 0, backImage.Width, backImage.Height - h, GraphicsUnit.Pixel);
                        h += 1;
                        if (h < this.Height) g.DrawImage(backImage, new Rectangle(0, 0, this.Width, h), 0, backImage.Height - h, backImage.Width, h, GraphicsUnit.Pixel); else h = 0;
                    }
                    this.CreateGraphics().DrawImage(img, 0, 0);
                }
            }
        } 

    }
}

[wzuomin]

新建一个项目,选择vb或者C# Window窗体应用程序,把上面相应语法代码复制过去,运行即可.

[wzuomin]

[Quote=引用 7 楼 chenqqabcdchenqqabcd 的回复:]
确实可以，可是这句话不懂
using (Graphics g = Graphics.FromImage(img))
{
g.DrawImage(backImage, new Rectangle(0, h, this.Width, this.Height - h), 0, 0, backImage.Width, backImage.Height - h, GraphicsUnit.Pixel);
h += 1;
if (h < this.Height) g.DrawImage(backImage, new Rectangle(0, 0, this.Width, h…
[/Quote]


建议好好看看MSDN上关于 Graphics.DrawImage() 的说明吧

[悔说话的哑巴]

他们都给了例子了，我就帮顶

[itcrazyman]

mark up 帮顶

[我很懒]

重绘背景图片，看看gdi+方面资料吧！

[zzxap]

http://hi.baidu.com/pangula/blog/item/409e01d81c0dc22b10df9b53.html

[happychou]

关注。。。

[linamong]

留名 以后需要相关内容的时候备查

[ztmdsbt]

我也在做飞机游戏...收藏啦~

[chenqqabcdchenqqabcd]

确实可以，可是这句话不懂
using (Graphics g = Graphics.FromImage(img))
{
g.DrawImage(backImage, new Rectangle(0, h, this.Width, this.Height - h), 0, 0, backImage.Width, backImage.Height - h, GraphicsUnit.Pixel);
h += 1;
if (h < this.Height) g.DrawImage(backImage, new Rectangle(0, 0, this.Width, h), 0, backImage.Height - h, backImage.Width, h, GraphicsUnit.Pixel); else h = 0;
}
this.CreateGraphics().DrawImage(img, 0, 0);
可以帮我解释吗？
我的邮箱:[e-mail]
谢谢拉

[wxz280973534]

[Quote=引用 1 楼 yangqidong 的回复:]
不需要两个图片啊
Graphics.DrawImage有几个重载方法是可以指定绘制图片的哪一部分的
完全可以把图片上半部分绘制在窗体下半部，而把图片 下半部画在窗体上半部
[/Quote]

呵呵,谢谢,昨天断网前,我也想到了,用这个方法不错

[]

C++ 游戏中 的运动类 能够实现背景的滚动吗？
还有其它方法 帮忙写一下 参考一下下