In November of 1999, Professor of Mathematics, George Francis contacted me, asking me if I would be interested in making physical sculptures from the Optiverse movie, which Professor Francis, John Sullivan and others had made and shown in 1998.
(Image by John Sullivan, UIUC)
The Optiverse shows an entirely new way to turn a sphere inside out without cutting it. This operation is called eversion.
The Optiverse is in part based on another sphere eversion developed by Bernard Morin.
One difference between the Optiverse and Morin's eversion is that the Optiverse uses a minimal surface bending energy constraint, imposed by simulating the surface in Ken Brakke's Evolver.
Bernard Morin is a mathematician, blind since childhood, former Fellow at the Institute for Advanced Study, Princeton University.
Professor Morin was interested in the ways in which the Optiverse differs from his Morin eversion, but he could not understand the difference, because he could not see the computer-rendered Optiverse movie.
I created four eight-inch models from frames 0, 9, 12 and 27 of a 54-frame clip of the computer-generated geometrical data from the Optiverse. The objects were built courtesy of 3-D Systems, Santa Clarita, California.
I presented these models to Professor Morin during an International Colloquium on Art and Mathematics in Maubeuge, Northern France on September 22, 2000.
(Photographs by John Sullivan, UIUC)
In 2003, Terry Hoppe of the Stratasys service bureau built full models of Tope 9 (near half-way) and Tope 27 (near gastrula) of the Optiverse in ABS thermoplastic.
I had a meeting with Bernard Morin during INTERSCULPT 2003 at which time he requested a version of the Optiverse surfaces sliced and with registration pins to afford reassembly. I have created a prototype of this model using the FDM ABS version of Tope 9.
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