Question

当有人将鼠标放在MainMenu的按钮内时，我想播放一次声音效果。问题在这里 - MainMenu处于循环中，所以我的声音一直在重复。当有人将鼠标放在按钮内时，如何播放一次声音？

按钮：

if(mouse is in position X = <0,100> and Y = <0,100>){
    drawButton( X = 0, Y = 0, X2 = 100, Y2 = 100);
}

按钮处于循环中：

while( we are in MainMenu state )
{
    if(mouse is in position X = <0,100> and Y = <0,100>){
        drawButton( X = 0, Y = 0, X2 = 100, Y2 = 100);
    }
}

声音：

Music Sound_1 = new Music("res/Sound/Sound_1.wav");

播放声音：

Sound_1.play(1.0f, 1.0f);

代码：

while( we are in MainMenu state )
{
    if(mouse is in position X = <0,100> and Y = <0,100>){
        Sound_1.play(1.0f, 1.0f); <- IT MUST PLAY JUST ONCE WHENEVER MOUSE IS IN BUTTON
        drawButton( X = 0, Y = 0, X2 = 100, Y2 = 100);
    }
}

Answer 1

您可以通过调用（使用示例声音变量Sound_1）来检查声音是否已播放：

if(mouse is in position) {
    if(!sound_1.playing()) {
        sound_1.play(1.0f, 1.0f);
    }
    drawButton(x,y,x2,y2);
}

使用声音/音乐对象具有光滑的.playing（）方法，如果声音当前正在播放，则返回布尔值true，否则返回false。希望这会有所帮助：）

Answer 2

在调用循环之前，添加一个布尔值来跟踪游戏是否应播放声音：

boolean playSound = false;

然后，当您调用循环时，请执行以下操作：

    loop() {
        playSound = true;

        if (/**Mouse is on the button*/) {playSound = true;}
        else {playSound = false}

        //If playSound is true, then play the sound
        if (playSound) {sound.play(1.0f, 1.0f);}
        else 
            return;
     }

这应该有用！

Answer 3

您需要设置一个布尔值来确定我们是否已播放声音。

boolean soundHasPlayed = false;
while( we are in MainMenu state )
{
    if(mouse is in position X = <0,100> and Y = <0,100>){
        if (!soundHasPlayed) // only do this if we haven't played the sound yet
        {
            Sound_1.play(1.0f, 1.0f);
            drawButton( X = 0, Y = 0, X2 = 100, Y2 = 100);
            soundHasPlayed = true; // don't play it again until we leave the button
        }
    }
    else
    {
        // We left the button, so we can play it again if we ever enter the button again.  
        // (Omit this if you really only want it to play once, ever, even if they mouse over the button again.)
        soundHasPlayed = false;
    }
}

如何在LWJGL / Slick2D中循环播放声音

3 个答案: