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Re: Locator3D or Slider3D code?

G. Raymond Brown wrote:
>  Has anyone written code to implement a 3D Slider or 3D Locator for use
> in Manipulate?  (And willing to share it?)  I'm thinking of control with
> a mouse, using the scroll wheel for the 3rd degree of freedom.  I would
> love to have this functionality, but intimidated at the prospect of
> trying to code it myself.  I found no help in searching the archives of
> this group.
> Alternatively, does anyone know if this functionality might be on the
> horizon coming from Wolfram?
> I could, of course, use 3 1D sliders for each point location, or 1 2D
> slider and another 1D slider, but this is awkward, and, I think, a
> violation of the spirit of a Demonstration.

Depending on the application, MousePosition["Graphics3DBoxIntercepts"] 
may be useful.  See this thread for an example on how it works:


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