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The computational model in action:
V 1.4 of the general model as java applet including its source file can be
loaded here.
Below you can generate regular convex polytope structures (all use the same
applet with different parameters):
2 dimensions
- [2][p]
will form polygonal structures {p} with a stable equilibrium. Try incrementing/decrementing
points by one.
3 dimensions:
Regular structures
- [3][4] will form a Tetrahedron
structure {3,3} with a stable equilibrium at distance 4*sqrt(6)=9,7979....
- [3][6] will form an
Octahedron structure {3,4} with a stable equilibrium at distance 6*(2*sqrt(2)+1)=22.9705....
- [3][12] will form
an Icosahedron structure {5,3} with a stable equilibrium at distance 94.5829....
Irregular structures
- [3][8] is
a multi-stable configuration and is unlikely* to form a cube structure {4,3}
with an unstable equilibrium at distance =8*(sqrt(3)+sqrt(6)+1)=41.4523...
, but will show a square anti-prism structure with a stable equilibrium and
a greater distance of 41.4730... instead.
* Try incrementing and then decrementing dimensions by one under law 1/R,
after trying a few times a cube will show up as a stable structure or remain
for a short while and then change to a square anti-prism.
- [3][20] is a multi-stable
configuration and is unlikely to form a dodecahedron structure {3,5}, but
will show a structure with a stable equilibrium and a greater distance of
264.8361... instead.
4 dimensions:
Regular structures
- [4][5] will
form a Hypertetrahedron structure {3,3,3} with a stable equilibrium at distance
15.8113....
- [4][8] will form
Hyperoctahedron structure {3,3,4} with a stable equilibrium at distance 8*(3*sqrt(2)+1)=41.9411....
- [4][24 will
form 24-cell structure {3,4,3}, succeeds about once every eight times with the
24-cell having optimal distance. This is a multi-stable configuration which
has at least 2 stable structures with a stable equilibrium at distances 388.1002...
and 388.0972... respectively.
- [4][120] will
form a Hypericosahedron {3,3,5}, with a stable equilibrium at distance 9769.9664...
Irregular structures
- [4][16] is
a multi-stable configuration and is unlikely to form the regular hypercube
structure {4,3,3} with an unstable equilibrium, but will show structures with
stable equilibriums and greater distances of 169.0191... and 169.0183... instead.
- [4][600] is a
multi-stable configuration and is unlikely to form the the regular hyperdodecahedron
structure {5,3,3} with an unstable equilibrium, but will show a structure
with a stable equilibrium and a greater distance of 244436.9560... instead.
(After 50,000 iterations in 1/R^3 law, so be patient!).
5 dimensions and higher*:
Regular structures
- [n][n+1] will form
n-simplex structures {3,3...,3} with stable equilibriums. Try incrementing/decrementing
points and dimensions by one.
- [n][2*n]
will form n-crosspolytope structures {3,3...,4} with stable equilibrium
at distance 2*n*((n-1)*sqrt(2)+1).
Try incrementing/decrementing points by 2 and dimensions by one.
Irregular structures
- [n][n^2] are
multi-stable configurations and are unlikely to form hyper-n-cubes, {4,3,3,...,3}
with unstable equilibriums, but will show structures with stable equilibriums
and greater distances instead.
*The current computational model is limited to 100 dimensions
and 1000 points.
2004, Symen H. Hovinga
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