If(picturebox.Right == panel.Right) 不工作但 if(picturebox.Left == panel.Left) 工作

Question

我不确定为什么，但每当我处理碰撞时，似乎控件的顶部和左侧属性一切正常，但右侧和底部属性却不太顺利。我不确定是不是因为它们是只读属性，但请有人帮忙。

这是代码

操场（面板）class

    namespace final_pong_game_phase_3
{
class PlayGround
{
    public Panel Panel;
    Size PlayGroundSize;
    public int Top;
    public int Bottom;
    public int Right;
    public int Left;
    public PlayGround(Panel panel,Size size, Point location)
    {
        this.Panel = panel;
        this.PlayGroundSize = size;
        this.Panel.Size = this.PlayGroundSize;
        this.Panel.BackColor = Color.Black;
        this.Panel.Location = location;
        this.Panel.SendToBack();

        this.Top = panel.Top;
        this.Bottom = panel.Bottom;
        this.Right = panel.Right;
        this.Left= panel.Left;
    }



}
} 

球（图片框）Class

    namespace final_pong_game_phase_3
  {
class Ball
{
    Size BallSize;
    Point Location;
    int TopSpeedInterval;
    int LeftSpeedInterval;
    PictureBox BallGraphic;
    public int Top;
    public int Left;
    public int Bottom;
    public int Right;

    public Ball(Point location, int topspeedinterval,int leftspeedinterval, Size ballsize, PictureBox ballgraphic)
    {
        this.Location = location;
        this.TopSpeedInterval = topspeedinterval;
        this.LeftSpeedInterval = leftspeedinterval;
        this.BallSize = ballsize;
        this.BallGraphic = ballgraphic;

        this.BallGraphic.Location = this.Location;
        this.BallGraphic.BackColor = Color.White;
        this.BallGraphic.Size = this.BallSize;
        this.BallGraphic.BringToFront();

        this.Top = BallGraphic.Top;
        this.Left = BallGraphic.Left;
        this.Bottom = ballgraphic.Bottom;

    } 

    public void start()
    {
        Top -= TopSpeedInterval;
        Left -= LeftSpeedInterval;

        BallGraphic.Top = Top;
        BallGraphic.Left = Left;
        Bottom = BallGraphic.Bottom;
        Right = BallGraphic.Right;


    } 

    public void SwitchTopDirection()
    {
        TopSpeedInterval *=-1; 

    } 

    public void SwitchLeftDirection()
    {
        LeftSpeedInterval *= -1;
    } 

    public void Hit()
    {
        TopSpeedInterval+= 5;
        LeftSpeedInterval+= 5;
    }
}
 } 

GameWorld（控制和监视游戏中的所有内容 class 方法在每次计时器滴答时发生）Class

    //ball to wall collision 
        if (playground.Top == ball.Top)
        {
            ball.SwitchTopDirection();
            Console.Beep(1000, 100);
        }

        if (playground.Left == ball.Left)
        {
            Console.Beep(1500, 700);
            MessageBox.Show("Player 2 Wins!!!");

        }

        if (playground.Right == ball.Right)
        {
            MessageBox.Show("Player 2 Wins!!!");
        }

        if (ball.Bottom >= playground.Bottom)
        {
            ball.SwitchTopDirection();
            Console.Beep(1000, 100);
        }

Answer 1

这可能对你有用

if (Math.Abs(playground.Right - ball.Right)<=7)
{
    MessageBox.Show("Player 2 Wins!!!");
}

我们在这段代码中所做的是检查 Playground 和它碰撞的 Ball 的 +-7 范围。