显示 3D 模型的坐标（位置）

Question

我在 C# wpf 中有一个 3D 模型，每次使用时间跨度旋转 360 度旋转 5 度。但我希望能够像在 window 表单上查看 point3DX、point3DY、point3DZ 一样查看其坐标。

我该怎么做？

这是我设置模型初始位置和旋转的函数

 private void SetViewPosition()
    {
        Vector3D vAxis = new Vector3D(0, 0, 1);
        ///<summary>
        ///R = AxisAngleRotation()
        ///vAxis = Vector length
        ///-15 = Angle
        ///</summary>
        AxisAngleRotation3D myRotation = new AxisAngleRotation3D(vAxis, -15);
        RotateTransform3D myRotationTransform = new RotateTransform3D(myRotation);
        gCamWC = myRotationTransform.Value;
        gCamWC.M14 = -50;
        gCamWC.M24 = 10;
        gCamWC.M34 = 0;

        Point3D camPosition = new Point3D(gCamWC.M14, gCamWC.M24, gCamWC.M34);
        Vector3D startLookAt = new Vector3D(gCamWC.M11, gCamWC.M21, gCamWC.M31);//VLook = 1st Column//DT=[1,0,0]//Vertical
        Vector3D startLookUp = new Vector3D(gCamWC.M13, gCamWC.M23, gCamWC.M33);//VUp = 2nd Column//DT = [0,0,1]//Vertical


        DrawingControl.Viewport.SetView(camPosition, startLookAt, startLookUp, 0);//=DR -> How the camera should move

    }

    //STEP 4
   private void RotatingModelAround(object sender, EventArgs e)
    {
        Vector3D vAxis = new Vector3D(gCamWC.M31, gCamWC.M32, gCamWC.M33);  //Rotate about world z-axis.
        AxisAngleRotation3D myRotation = new AxisAngleRotation3D(vAxis, 5);
        RotateTransform3D myRotationTransform = new RotateTransform3D(myRotation);

        Matrix3D doTranslation = new Matrix3D();
        doTranslation.M24 = 3;  // Offset along camera y-axis.  Presumed to be parallel to world plane.


        gCamWC.Append(myRotationTransform.Value);
        gCamWC.Append(doTranslation);

        Point3D camPosition = new Point3D(gCamWC.M14, gCamWC.M24, gCamWC.M34);
        Vector3D camLookAt = new Vector3D(gCamWC.M11, gCamWC.M21, gCamWC.M31);
        Vector3D camLookUp = new Vector3D(gCamWC.M13, gCamWC.M23, gCamWC.M33);

        DrawingControl.Viewport.SetView(camPosition, camLookAt, camLookUp, 0);
    }

这就是他们的名字

   public XplorerMainWindow()
    {
        InitializeComponent();
        Closed += XplorerMainWindow_Closed;
        //STEP 1
        Loaded += XplorerMainWindow_Loaded;

        Closing += XplorerMainWindow_Closing;
        DrawingControl.UserModeledDimensionChangedEvent += DrawingControl_MeasureChangedEvent;
        InitFromSettings();

        RefreshRecentFiles();

        UserFilters = new FilterValues();//COBie Class filters, set to initial defaults
        CoBieTemplate = UkTemplate;


        if (Settings.Default.PluginStartupLoad)
            RefreshPlugins();




        //STEP 4
       // Add Dispatcer Time so the Rotation will be repeated
        System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
        dispatcherTimer.Tick += RotatingModelAround;
        //dispatcherTimer.Tick += QRotateModel;
        dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0,300);//(d,h,m,s,mil.s.)
        dispatcherTimer.Start();


    }

例如根据我的项目，我想要这部分代码：

Point3D camPosition = new Point3D(gCamWC.M14, gCamWC.M24, gCamWC.M34);
        Vector3D camLookAt = new Vector3D(gCamWC.M11, gCamWC.M21, gCamWC.M31);
        Vector3D camLookUp = new Vector3D(gCamWC.M13, gCamWC.M23, gCamWC.M33);

... 显示在我的 window 表单中，例如：

相机位置：(-50.00, 10.00, 0.00) 相机注视：(1.00, 0.00, 0.00) 相机查找：(0.00, 0.00, 1.00)

并且相机每旋转5度，改变的值就会显示在window表格上

Answer 1

（请参阅下面的更新，以回应您进一步澄清您的问题:)）

最初你说你想知道你的 3d 模型的坐标。

I have a 3D model in C# wpf that rotates 360degrees rotating 5degrees each time using timespan. But I want to be able to view its coordinates like viewing the point3DX, point3DY, point3DZ on my window form.

但是您在评论中澄清说您感兴趣的实际上是相机位置。

... what I want is to ... view the coordinates or position of the camera each time it moves, I want the coordinates to be displayed on my window form.

假设评论是您真正的问题（如何获取和显示相机的 3d 位置），这是我的解决方案：

gCamWC 是 Matrix3D。我知道这是因为：

gCamWC = myRotationTransform.Value;

..并且由于 myRotationTransform 是一个 RotateTransform3d，它的值是一个 Matrix3D (documentation)。

我不熟悉 Matrix3D，但是快速的 MSDN 搜索表明您可以创建一个标签（我将称之为 posLabel）并在添加 gCamWC 后在 RotatingModelAround 方法中执行此操作：

posLabel.Text = "{0}\t{1}\t{2}", gCamWC.offsetX, gCamWC.offsetY, gCamWC.offsetZ;

如果有效，这应该使标签显示如下内容（例如 3.0、6.7、8.9 的向量）：

3.0 6.7 8.9

**（抱歉，SO 格式不允许我使用制表符空格，但每个值之间会有一个制表符）*

它应该在每次旋转时更新。

编辑： 你说你想要这样的标签：

Camera Position: (-50.00, 10.00, 0.00) Camera LookAt: (1.00, 0.00, 0.00) Camera LookUp: (0.00, 0.00, 1.00)

尝试创建一个名为 posLabel 的标签，然后在 RotatingModelAround() 方法中完成附加 gCamWC 后添加以下代码：

posLabel.Text = "Camera Position: (" + gCamWC.M14 + ", " + gCamWC.M24 + ", " + gCamWC.M34 + ") Camera LookAt: (" + gCamWC.M11 + ", " + gCamWC.M21 + ", " + gCamWC.M31 + ") Camera LookUp: (" + gCamWC.M13 + ", " + gCamWC.M23 + ", " + gCamWC.M33 + ")";

显示 3D 模型的坐标（位置）

Display 3D model's coordinates (position)

c#

wpf

coordinates

3d-model