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-This shows a rotating Clifford Torus: a torus lying on the
-"surface" of a 4D hypersphere. Inspired by Thomas Banchoff's book
-"Beyond the Third Dimension: Geometry, Computer Graphics, and Higher
-Dimensions", Scientific American Library, 1990.
+A Clifford Torus: a torus lying on the "surface" of a 4D hypersphere.
+Inspired by Thomas Banchoff's book "Beyond the Third Dimension:
+Geometry, Computer Graphics, and Higher Dimensions", Scientific
+American Library, 1990.
http://en.wikipedia.org/wiki/N-sphere
http://en.wikipedia.org/wiki/Clifford_torus