爲什麼球沒有在右邊的邊緣彈跳

Question

球在右邊的中途彈回。但是，我希望它在右邊反彈。我可以知道我該怎麼做對嗎？我擁有的代碼如下。

public partial class StartGame : Form 
{ 
    int x; //The x axis from the upper left corner 
    int y; //The y axis from the upper left corner 
    int spdX; //The change of x 
    int spdY; //The change of y 

    public StartGame() 
    { 
     InitializeComponent(); 
    } 

    private void StartGame_Load(object sender, EventArgs e) 
    { 
     //Loads the ball on the screen at bottom of the window 
     spdX = 1; //The speed of the ball of y 
     spdY = 1; //The speed of the ball of x 
     x = this.ClientSize.Width/5; //The x axis the ball is loaded at 
     y = this.ClientSize.Height - 10; //The y axis the ball is loaded at 
    } 

    private void StartGame_Paint_1(object sender, PaintEventArgs e) 
    { 
     //This is the inner paint color of the circle that is 10 by 10 
     e.Graphics.FillEllipse(Brushes.Blue, x, y, 10, 10); 
     //This is the outline paint color of the circle that is 10 by 10 
     e.Graphics.DrawEllipse(Pens.Blue, x, y, 10, 10); 
    } 

    private void timer1_Tick(object sender, EventArgs e) 
    { 
     y = y + spdY; 
     x = x + spdX; 

     if (y < 0) 
     { 
      spdY = -spdY; //if y is less than 0 then we change direction 
     } 
     else if (x < -5) 
     { 
      spdX = -spdX; 
     } 
     else if (y + 10 > this.ClientSize.Height) 
     { 
      spdY = -spdY; //if y + 10, the radius of the circle is greater than the form width then we change direction 
     } 
     else if (x + 10 > this.ClientSize.Height) 
     { 
      spdX = -spdX; 
     } 

     this.Invalidate(); 
    } 

Answer 1

您錯誤地檢查'x'移動的高度。

變化：

else if (x + 10 > this.ClientSize.Height) 

要：

else if (x + 10 > this.ClientSize.Width) 

Answer 2

應該

else if (x + 10 > this.ClientSize.Width) 

複製/粘貼錯誤？ :)