如何在没有连续绘图的情况下正确制作2d Sprite？

Question

我正在努力制作一个具有特定主题的迷你游戏。但是，我在使用精灵时遇到了麻烦。每当我移动它时，它会不断地绘制精灵，留下一堆垃圾。 我该如何解决这个问题？

这是一张图片。

：编辑：

我应该详细说明：

我使用BitMap作为精灵图像，使用Graphics对象来显示它们。但是，因为我对C＃图形很新，并且还没有完全理解这些对象（图形，矩形，位图等）。

以下是整个班级的代码。 如果我做错了，我道歉。

private void Tmr_Tick(object sender, EventArgs e)
{
    //This method changes the position of the sprite
    if (u && Area.Top > -3) { Area.Y -= speed; Sprite.DrawImage(ReDraw(), Area); lastDirection = 0; }
    if (d && Area.Bottom < (this.Height - 30)) { Area.Y += speed; Sprite.DrawImage(ReDraw(), Area); lastDirection = 2; }
    if (r && Area.Right < (this.Width - 13)) { Area.X += (speed + 1); Sprite.DrawImage(ReDraw(), Area); lastDirection = 1; }
    if (l && Area.Left > 0) { Area.X -= (speed + 1); Sprite.DrawImage(ReDraw(), Area); lastDirection = 3; }
    this.Text = lastDirection.ToString();
}

private void btStart_Click(object sender, EventArgs e)
{
    //This is irrelevant for the most part
    btStart.Visible = false;
    Tmr.Interval = 10;
    StepControl.Interval = 89;
    StepControl.Start();
    Tmr.Start();
    this.Focus();
    Sprite.DrawImage(ReDraw(), Area);
}

private void btStart_KeyUp(object sender, KeyEventArgs e)
{

}

private void VS2013_KeyDown(object sender, KeyEventArgs e)
{
    //Uses keys to control movement
    switch (e.KeyCode)
    {
        case Keys.Up: { u = true; break; }
        case Keys.Down: { d = true; break; }
        case Keys.Left: { l = true; break; }
        case Keys.Right: { r = true; break; }
        case Keys.P: 
            { 
                if (speed == 1) { speed = 2; break; }
                else { speed = 1; break; }
            }
    }
}

private void VS2013_KeyUp(object sender, KeyEventArgs e)
{
    switch (e.KeyCode)
    {
        case Keys.Up: { u = false; break; }
        case Keys.Down: { d = false; break; }
        case Keys.Left: { l = false; break; }
        case Keys.Right: { r = false; break; }
    }
}
private Bitmap ReDraw()
{
     //This method returns an image for the Graphics object "Scene" to draw.
     //"Draw" will change based on certain directional circumstaces.
                try
                {
                    //Below line allows for transparency
                    //Scene.Clear(Color.Transparent);
                    Scene.Clear(this.BackColor);
                    Scene.DrawImage(Draw, Area);
                    return Background;
                }
                catch
                {
                    //Below line allows for transparency
                    //Scene.Clear(Color.Transparent);
                    Scene.Clear(this.BackColor);
                    Scene.DrawImage(LinkDown, Area);
                    return Background;
                }        
}

private void StepControl_Tick(object sender, EventArgs e)
{
    if (lastDirection == 2)
    {
        if (mirror) { mirror = false; Draw = LinkDown2; }
        else { mirror = true; Draw = LinkDown; }
    }
    if (lastDirection == 1)
    {
        if (mirror) { mirror = false; Draw = LinkRight2; }
        else { mirror = true; Draw = LinkRight; }
    }
    if (lastDirection == 3)
    {
        {
            if (mirror) { mirror = false; Draw = LinkLeft2; }
            else { mirror = true; Draw = LinkLeft; }
        }
    }
    if (lastDirection == 0)
    {
        {
            if (mirror) { mirror = false; Draw = LinkUp2; }
            else { mirror = true; Draw = LinkUp; }
        }
    }
}

private void VS2013_Load(object sender, EventArgs e)
{

}
private void EraseBack()
{
    LinkDown.MakeTransparent(this.BackColor);
    LinkDown2.MakeTransparent(this.BackColor);
    LinkRight.MakeTransparent(this.BackColor);
    LinkRight2.MakeTransparent(this.BackColor);
    LinkLeft.MakeTransparent(this.BackColor);
    LinkLeft2.MakeTransparent(this.BackColor);
    LinkUp.MakeTransparent(this.BackColor);
    LinkUp2.MakeTransparent(this.BackColor);
}