使用 C# 和 WPF 进行任意光线测试

发布于 2024-09-30 08:01:18 字数 676 浏览 6 评论 0原文

我想知道来自任意点的射线是否会击中多边形。了解空间中发生相交的点以及对该多边形的引用将很有用。我正在使用 System.Windows.Media.Media3D 库，并已完成光线跟踪测试，但尚未从 VisualTreeHelper.HitTest 返回的 HitTestResult 对象中破解我想要的任何信息。

我是不是找错地方了？

是否有不同的方法来测试任意交叉点？

代码：

private void MainViewport_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    // Retrieve the coordinate of the mouse position.
    Point pt = e.GetPosition((UIElement)sender);

    // Perform the hit test against a given portion of the visual object tree.
    HitTestResult result = VisualTreeHelper.HitTest(MainViewport, pt);

    if (result != null)
    {
        // Perform action on hit visual object.
    }
}

原文

I want to know if a ray from an arbitrary point will strike a polygon. It would be useful to know the point in space that intersection occurs and also a reference to that polygon. I'm using the System.Windows.Media.Media3D library and have done a ray trace test but have yet to crack any of teh information i want out of the HitTestResult object returned by VisualTreeHelper.HitTest.

Am i looking in the wrong place?

Is there a different approach to test for arbitrary intersection?

The Codez:

private void MainViewport_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    // Retrieve the coordinate of the mouse position.
    Point pt = e.GetPosition((UIElement)sender);

    // Perform the hit test against a given portion of the visual object tree.
    HitTestResult result = VisualTreeHelper.HitTest(MainViewport, pt);

    if (result != null)
    {
        // Perform action on hit visual object.
    }
}

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