Do you mean a revolving door like department stores and office buildings have?  If so, you can make a reasonable mock-up out of 2x4's and possibly plastic sheeting for the glass panels. 

I very successfully make revolving pieces with short lengths of pipe and pipe flanges.  A  2" length of 2" pipe (called a close nipple at the plumbing store) screwed to a flange which is bolted to a platform (to save your floor) and a similar piece of 1-1/2" pipe and flange in the center of your door unit.  If needed, the doors could have small wheels or castors on their outboard ends so they spin evenly. 

Hope this makes sense/helps.  Good luck.

Let me add to that:  The 2" pipe and flange are bolted down to the platform (pipe sticking up) making a sort of cup, and the 1-1/2" pipe and flange are bolted up to the revolving structure, whatever it is, with the pipe pointing down.  The revolving piece with the 1-1/2" pipe then is lowered over and nests into the 2" pipe. 

The pipes can be as long or as short as needed, and grease helps them spin quietly.  If you intend to grease them, bolt the lower flange through a scrap of plastic so that the grease doesn't forever contaminate your platform top and is easily cleaned up.

Edited for clarity

We used 'lazy susan' bearings when we had windows that had to pivot in the middle. You can screw them into the floor/platform and into the door/window.