命中测试 WPF 3D 模型零件
我有一个大的ModelVisual3D（例如汽车），它分为许多较小的GeometryModel3D对象（例如轮胎、座椅、车轮等）。
我想在单击鼠标时测试 ModelVisual3D 并确定哪个 GeometryModel3D 被点击。我可以点击测试我的汽车（ModelVisual3D），但无法确定汽车的哪一部分（GeometryModel3D 对象）被单击。
有谁知道在处理 MouseLeftButtonDown 事件（或任何其他鼠标事件）时如何确定模型的确切部分？
I have a big ModelVisual3D (e.g. car) which is divided into many smaller GeometryModel3D objects (e.g. tyres, seats, wheels, etc.).
I would like to hit test the ModelVisual3D when the mouse is clicked and determine which GeometryModel3D was hit. I can hit test my car (the ModelVisual3D) but cannot determine which part of the car (the GeometryModel3D objects) was clicked.
Does anybody have an idea how I can determine the exact part of my model when handling a MouseLeftButtonDown event (or any other Mouse event)?
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看看 http://www.kindohm.com/technical/ComplexVisuals.htm - 我相信那里解释的机制会有帮助。
Have a look at http://www.kindohm.com/technical/ComplexVisuals.htm - I believe the mechanisms explained there will help.
此博客文章展示了如何使用该框架进行光线测试：
http://blogs.msdn.com/b/wpf3d/archive/2009/05/18/3d-hit-testing.aspx
回调中的结果包含有关相交网格的详细信息，您可以从中获取相交网格的特定部分。
This blog post shows how to do ray testing with the framework:
http://blogs.msdn.com/b/wpf3d/archive/2009/05/18/3d-hit-testing.aspx
The result in the callback has detail on the intersected mesh from which you can get the specific part of the mesh which was intersected.