如何計算這個班的信箱大小？

我有我爲LibGdx OpenGL項目編寫的以下Java類。無論您如何通過letterboxing頂部和底部或側面來調整屏幕大小，相機都會保持屏幕的寬高比。到現在爲止還挺好。如何計算這個班的信箱大小？

當我嘗試獲取鼠標點擊的x，y座標，並且信箱涉及該軸時，問題就出現了。首先這裏是類：

public class Camera { 

private static float viewportWidth; 
private static float viewportHeight; 
private static float aspectRatio; 
private static float barSize; 

/** 
    * Creates an orthographic camera where the "play area" has the given viewport size. The viewport will be scaled to maintain the aspect ratio. 
    * 
    * @param virtualWidth the width of the game screen in virtual pixels. 
    * @param virtualHeight the height of the game screen in virtual pixels. 
    * @return the new camera. 
    * 
    */ 

public static OrthographicCamera createCamera(float virtualWidth, float virtualHeight) { 

    aspectRatio = virtualWidth/virtualHeight; 


    float physicalWidth = Gdx.graphics.getWidth(); 
    float physicalHeight = Gdx.graphics.getHeight(); 

    if (physicalWidth/physicalHeight >= aspectRatio) { 
//  Letterbox left and right. 
     viewportHeight = virtualHeight; 
     viewportWidth = viewportHeight * physicalWidth/physicalHeight; 
     barSize = ????; 
    } 
    else { 
//  Letterbox above and below. 
     viewportWidth = virtualWidth; 
     viewportHeight = viewportWidth * physicalHeight/physicalWidth; 
     barSize = ????; 
    } 

    OrthographicCamera cam = new OrthographicCamera(viewportWidth , viewportHeight); 
    cam.position.set(virtualWidth/2, virtualHeight/2, 0); 
    cam.rotate(180, 1, 0, 0); 
    cam.update(); 
    Gdx.app.log("BTLog", "barSize:"+barSize); 
    return cam; 
} 

public static float getViewportWidth() { 
    return viewportWidth; 
} 

public static float getViewportHeight() { 
    return viewportHeight; 
} 
}

LibGdx提供我x和當偶數發生y座標，我需要將這些原始座標轉換成我的相機的規模（虛擬高度和寬度）。

當屏幕被拉伸（無上下黑邊的話），這是很容易通過使用獲得的X和Y座標：

xRelative = (int) (x/(float)Gdx.graphics.getWidth() * Camera.getViewportWidth()); 
yRelative = (int) (y/(float)Gdx.graphics.getHeight() * Camera.getViewportHeight());

問題是，當與信箱開始發揮作用，它拋出關閉該軸的座標。我知道我需要考慮信箱的寬度，但我有一段時間計算如何計算它。

上面我在哪裏「barSize = ????;」我的第一本能是做到這一點： barSize = physicalHeight - viewportHeight; //使用高度例如

一旦我得到了barSize，我確信我可以用它來得到正確的數字（例如使用Y軸）：

yRelative = (int) (y/(float)Gdx.graphics.getHeight() * Camera.getViewportHeight() - Camera.getBarSize());

但數字不匹配。任何建議，將非常感激！

來源

2011-04-23 Rendrik

Ray ray = camera.getPickRay(x, y); 
System.out.println(ray.origin.x); 
System.out.println(ray.origin.y);

來源

2011-04-24 07:13:13 NateS

如何計算這個班的信箱大小？

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