连续移动控件时，怎么才不闪烁

pig357 2013-07-27 11:03:23

环境：VS2008 winform C# win7
问题：我用一张大图片作为背景，再添加了个自定义控件Players0，目的时当右键背景时，控件就从当前位置orgPt以speed0的速度移动到目标地点destPt，现在就是不管定时器设置为多少间隔，都会很闪烁。



private void timerPlay_Tick(object sender, EventArgs e)

        {

            if (Players0.Location != destPt)

            {

                orgPt = Players0.Location;

                turn[0] = Players0.Left - destPt.X;

                turn[1] = Players0.Top - destPt.Y;

                double s = Math.Sqrt((orgPt.X - destPt.X) * (orgPt.X - destPt.X) + (orgPt.Y - destPt.Y) * (orgPt.Y - destPt.Y));

                Players0.Left += (int)(Speed0 * (destPt.X - orgPt.X) / s);

                Players0.Top += (int)(Speed0 * (destPt.Y - orgPt.Y) / s);

                int xx = Players0.Left - destPt.X;

                int yy = Players0.Top - destPt.Y;

                if(xx * turn[0] <= 0)       //是否改变了方向，防止左右晃动

                    Players0.Left = destPt.X;

                if (yy * turn[1] <= 0)

                    Players0.Top = destPt.Y;

            }

            else

            {

                timerPlay.Enabled = false;

            }

        }

不知道这么算坐标是否有问题？为什么timer的间隔任意设置都感觉很闪烁？

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Regan-lin 2013-07-27

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speed0你设了多少?

江湖评谈 2013-07-27

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双缓冲技术，可以解决

智商余额不足 2013-07-27

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来个模拟的


public partial class Form1 : Form
{
    //目标坐标X
    private int targetX=-1;
    //目标坐标Y
    private int targetY=-1;
    //计时器，实现游戏循环
    private Timer loop;
    //角色
    private Player player;
    //速度
    private int speed = 5;


    public Form1()
    {
        InitializeComponent();

        DoubleBuffered = true;  
        player = new Player();
        loop = new Timer();
        loop.Interval = 10;
        loop.Tick += GameLoop;
        loop.Start();
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);
        player.Render(e.Graphics);
    }

    private void GameLoop(object sender, EventArgs e)
    {
        float dx = targetX - player.X;
        float dy = targetY - player.Y;
        float dd = (float)Math.Sqrt(dx * dx + dy * dy);
            
        if (dd < 5)
        {
            player.X = targetX;
            player.Y = targetY;
        }
        else
        {
            player.X += dx / dd*speed;
            player.Y += dy / dd*speed;
        }
        this.Invalidate();
    }

    private void Form1_MouseClick(object sender, MouseEventArgs e)
    {
        // 目标坐标
        targetX = e.X;
        targetY = e.Y;
    }
}
/// <summary>
/// 角色
/// </summary>
public class Player
{
    public float X { get; set; }
    public float Y { get; set; }

    public void Render(Graphics g)
    {
        using (Brush brush = new SolidBrush(Color.Red))
        {
            g.FillRectangle(brush, X-10, Y-10, 20, 20);
        }
    }
}

智商余额不足 2013-07-27

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引用 6 楼 pig357 的回复:

[quote=引用 5 楼 hwenycocodq520 的回复:] 你想做游戏？...

这种效果该如何实现呢[/quote]做游戏就不用控件了，至少2D来个GDI+吧~~

charles_y 2013-07-27

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控件的重绘除非你自己重写，否则闪烁难免。自己做图吧，别用控件

人生导师 2013-07-27

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搜索下WinForm中的双缓冲技术，具体代码参考7楼的代码

laisui 2013-07-27

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是背景闪烁还是控件闪烁? 在构造函数加上这几句话看看 SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.DoubleBuffer, true);

pig357 2013-07-27