Question

我正在尝试为我的XNA游戏创建一个splitScreen。我有一个相机类，我用作相机，当我需要绘制时，我调用包含下面代码的函数。 cameraViewport是一个vector4，所有值都在0,1之间。对于我使用的第一台相机

camera1.viewport = new vector4(0,0,1,.5f); // this works perfect

我正在使用的第二台相机

camera2.viewport = new vector4(0,.5f,1,.5f); // this is drawling the same view as camera1

但是当我为相机二拍摄时

camera2.viewport = new vector3(.5f,0,.5f,.5f);

事实证明，好像我正在将它分成4种方式并且它在右下方，但它应该在右上方。所以看起来它根本没有使用y值而只是使用x值。那是为什么？

            int x = (int)(defaultViewport.Width * CameraViewport.X);
            int y = (int)(defaultViewport.Height * CameraViewport.Y);
            int w = (int)(defaultViewport.Width * CameraViewport.Z);
            int h = (int)(defaultViewport.Height * CameraViewport.W);
            Viewport viewport = new Viewport(x, y, w, h);
            graphics.Viewport = viewport;
            this.Projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(45), viewport.AspectRatio, .1f, 5000);

Answer 1

实际上这是我的不好，错误在于我如何设置视口。

Vector4 cameraViewport;
public Vecor4 viewport
{
     Vector4 newviewport = value;
     cameraViewport = new Vector4(mathhelper.clamp(newviewport.x,0,1),...  //here was my problem i was setting the y value the same as the x value i didnt even think to check here sorry for this kinda point less question unless someone else has the same problem.  
}

为什么graphicsDevice.viewport（x，y，z，w）使用x表示x和y？

1 个答案: