Helix工具包Rotate 3D模型 [英] Helix toolkit Rotate 3D Model

问题描述

我是WPF的新手，我正在尝试制作一个程序来显示3d模型（已保存在计算机上）并根据按钮的点击进行旋转。我想使用三个按钮来围绕x，y和z轴旋转对象。我有显示模型的代码，但不确定如何通过单击按钮旋转模型。这是我到目前为止所拥有的；

I'm new to WPF and I'm trying to make a program that displays a 3d model (that is saved on my computer) and rotate it based on button clicks. I would like to have three buttons to rotate the object about the x, y, and z axes. I have code that will display the model but I am unsure how to rotate it using button clicks. Here is what I have so far;

C＃

public MainWindow()
{
    InitializeComponent();
    ModelVisual3D device3D = new ModelVisual3D();
    device3D.Content = Display3d(MODEL_PATH);

    // Add to view port
    viewPort3d.Children.Add(device3D);
}

private Model3D Display3d(string model)
{
    Model3D device = null;
    try
    {
        //Adding a gesture here
        viewPort3d.RotateGesture = new MouseGesture(MouseAction.LeftClick);

        //Import 3D model file
        ModelImporter import = new ModelImporter();

        //Load the 3D model file
        device = import.Load(model);
    }
    catch (Exception e)
    {
        // Handle exception in case can not find the 3D model file
        MessageBox.Show("Exception Error : " + e.StackTrace);
    }
    return device;
}
private void buttonX_Click(object sender, RoutedEventArgs e)
{
    //not sure what to put in here
}

XAML

<Grid Margin="0,0,6,94" RenderTransformOrigin="0.5,0.5">
    <Grid.RenderTransform>
        <TransformGroup>
            <ScaleTransform/>
            <SkewTransform/>
            <RotateTransform Angle="-0.275"/>
            <TranslateTransform/>
        </TransformGroup>
    </Grid.RenderTransform>
    <helix:HelixViewport3D x:Name="viewPort3d" ZoomExtentsWhenLoaded="true" Margin="0,0,10,64" >
        <!-- Remember to add light to the scene -->
        <helix:DefaultLights/>
        <ModelVisual3D x:Name="Models"/>
    </helix:HelixViewport3D>
    <Rectangle Fill="#FFF4F4F5" HorizontalAlignment="Left" Height="100" Margin="417,219,0,0" Stroke="Black" VerticalAlignment="Top" Width="100" RenderTransformOrigin="0.146,-0.196"/>
    <Button x:Name="buttonX" Content="ButtonX" HorizontalAlignment="Left" Height="30" Margin="216,356,0,-60" VerticalAlignment="Top" Width="104" Click="buttonX_Click"/>
</Grid>

我目前正在使用Helix工具包，但是如果有更简单的方法，请让我知道。

I'm currently using the Helix tool-kit but if there is an easier way, please let me know.

推荐答案

从问题的措辞中，我假设您要旋转模型而不是照相机，其中案例保存 device3D 并执行以下操作：

From the wording of your question I'll assume you want to rotate the model and not the camera, in which case save device3D somewhere and do this:

    private void buttonX_Click(object sender, RoutedEventArgs e)
    {
        var axis = new Vector3D(0, 0, 1);
        var angle = 10;

        var matrix = device3D.Transform.Value;
        matrix.Rotate(new Quaternion(axis, angle));

        device3D.Transform = new MatrixTransform3D(matrix);
    }

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