C#绘制一个移动的粒子

时间:2013-05-10 04:40:45

标签: c# draw move particles

我对c#非常陌生,我有一个简单的问题: 我应该在黑色背景上绘制一个白色粒子(矩形)并将其从一个屏幕水平移动到另一个屏幕。 我做到了,但问题是它眨了太多(即即使速度很高也不顺畅,我可以很容易地看到每个动作和另一个动作之间的黑色背景)

t.Interval = 1000 / speed;
t.Tick += new EventHandler(t_Tick);
t.Start();

...

void t_Tick(object sender, EventArgs e)
        {
            //g.Clear(Color.Black);
            g.DrawRectangle(new Pen(Brushes.Black, 20), r);      //draw a black rectangle in the old position...20 is the thickness of the pen
            r.X += move_x;
            g.DrawRectangle(new Pen(Brushes.White, 20), r);      //draw a white rectangle in the new position...20 is the thickness of the pen
            if (r.X >= 1700)       ///this means it reached the end of the screen
                t.Stop();
        }

我使用g.Clear来清除图形,但这也没有用,所以我在旧位置绘制了一个黑色矩形,然后将其移动到新位置。

任何想法如何消除这种眨眼甚至以另一种方式做到这一点?

1 个答案:

答案 0 :(得分:0)

试试这个...将一个Panel(panel1)添加到表单:

public partial class Form1 : Form
{

    private Rectangle r;
    private const int rSize = 50;
    private const int move_x = 10;
    private System.Windows.Forms.Timer tmr;

    public Form1()
    {
        InitializeComponent();

        panel1.BackColor = Color.Black;
        r = new Rectangle(0, panel1.Height / 2 - rSize / 2, rSize, rSize);

        tmr = new System.Windows.Forms.Timer();
        tmr.Interval = 50;
        tmr.Tick += new EventHandler(tmr_Tick);
        tmr.Start();

        panel1.Paint += new PaintEventHandler(panel1_Paint);
    }

    void tmr_Tick(object sender, EventArgs e)
    {
        r.X += move_x;
        panel1.Refresh();
        if (r.X > panel1.Width)
        {
            tmr.Stop();
            MessageBox.Show("Done");
        }
    }

    void panel1_Paint(object sender, PaintEventArgs e)
    {
        e.Graphics.DrawRectangle(Pens.White, r);
    }

}