WPF: Collision Detection between 2 ModelVisual3Ds

[quddusaliquddus]

Hi, I would like to know when a ModelVisual3D has overlapped another ModelVisual3D (I am uncertain as if they are in the same Viewport3D or not). The models are in XAML form.

I have searched and searched for a solution without success.

ANY help would be appreciated. Thanks

Q