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

Question

我正在尝试为我的 XNA 游戏创建一个 splitScreen。我有一个用作相机的相机类，当需要绘制时，我调用包含以下代码的函数。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

对于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

但是当我为相机二做这个时

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

结果好像我把它分成了 4 种方式，它在右下角，但它应该在右上角。所以看起来它根本不使用 y 值而只使用 x 值。这是为什么？

            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

实际上这是我的错，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.  
}