Laser Scanner for Mac

From Trochoid Technologies:

Laser Scanner models a type of laser scanner that you can easily build for about $20 (including laser). I'll put up plans to make it soon. The scanner generates patterns by drawing circles on circles. It demonstrates the property I noticed with the real scanner; the pattern will sometimes appear to be three dimensional, and adjusting controls will rotate the shape. This is the reason I wrote Trochoid Designer, to figure out why this happens. I've since figured out its only an illusion, yet it does have dimensional properties and by using the correct values a 3D object can be manipulated. Laser Scanner has less control in these respects but is still fun.