WPF使用Viewport3D投影摄像机，显示对象原始大小

desperaso 2019-09-20 10:19:24

找了很多例子，FieldOfView如何设置才能显示对象原始大小，baidu没找到，
google找到了，记录一下。给大家省点事

初中数学都忘光了



viewport3D = new Viewport3D();

        viewport3D.Width = 控件宽度*2;



        PerspectiveCamera perspectiveCamera = new PerspectiveCamera()

        {

            LookDirection = new Vector3D(0, 0, -1),

            NearPlaneDistance = 100,

        };

        //FieldOfView 默认为45度

        double fieldOfViewInRadians = perspectiveCamera.FieldOfView * (Math.PI / 180.0);

        var z = (0.5 * viewport3D.Width) / Math.Tan(0.5 * fieldOfViewInRadians);

        perspectiveCamera.Position = new Point3D(0.0, 0.0, z);

...全文