Deskrama uses a high resolution position and rotation sensor mounted on a lightweight LCD panel to allow a user to interactively explore a 3D model from a 2D plan.
Moving the LCD panel on a plan drawing of a building allows the user to see a cross-section through a 3D model of the building.
There is a demonstration video at MIT
http://cat2.mit.edu/deskrama/deskrama01_128KB.wmv
a synopsis available here
http://kf12.com/blogs/uploads/deskrama.pdf
and further details about the project are available from the Deskrama home page at MIT.
I found this to be an interesting concept which may be applicable to Mechanical CAD for visualising 3D Models. Particularly interesting is the concept of combining a motion sensor (position and rotation) with the lightweight screen - perhaps this is something which could be explored further.
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