The golem

-

This shape which I have named the golem, was hand picked from hundreds of Spectre-like polygons (Spectroids) that were sent my way via Ortwin Schenker, Bob Nungester and Bram Cohen.  

This golem has the same number of sides as the Spectre and also shares internal angles of 90, 120 and 270 degrees.




Below left is the simplest of the periodic tilings.  Positioning of new tiles is forced in most cases.  That said, the pattern can deviate at any time by placing other rotations where there are choices (as shown in the example bottom right).




The golem is a delight to tessellate (you can't go wrong!).  Below are a few more examples of periodic tilings.  These can be sewn together to make larger chaotic tilings with a bit of tweaking.




Next up are a couple of radial patterns.  The example on the right is (I think) quite unusual in that three golem segments are pointing towards the centre whilst the other three are pointing outwards.




The golem has mirror symmetry and fits to an underlying regular hexagon grid.  



I have found 41 unique single corona configurations.  All can continue to tile the plane in various ways, either on their own or with the addition of individual tiles.  Golems are limited to only three rotations (120° from one another) indicated by the colours.




Here's a couple of examples of single corona clusters that can be positioned around themselves to produce larger periodic tilings.  Examples top and bottom have translational symmetry.  Even though the clusters are quite different, the resulting pattern is essentially the same if the bottom example is rotated through 120 °.




Other clusters need to be rotated and mirrored which  in turn produces more complex patterns.  In this example, rotations of golems have been recoloured accordingly so that their colour always match their orientation.




Exactly the same cluster as above but golem colours remain fixed.  I have also expanded the pattern further.



Below are a couple of examples of non-tiling coronas.  The three-fold pattern can continue with either placement of individual golems or perhaps combinations of other coronas (it's that easy!).




Here's another but with two different configurations from the same corona.




Rosettes to finish.





Comments

Post a Comment

Popular posts from this blog

Determining chess 960 starting positions with a standard die (no rethrows)

-
Image
Chess 960 is a chess game variant invented by Bobby Fischer in 1996.   In Chess 960, the pawns are lined up on the second rank as in standard chess.   The first rank pieces are positioned randomly whilst conforming to certain caveats - the king must be placed somewhere between the rooks to allow castling; the bishops must stand on opposite coloured squares. I've worked out a system that allows me to select a starting arrangement for the first rank pieces using a standard six sided die without the need for rethrows.  My dice procedure is different from that of  I ngo Althöfer's (devised in 1998), where rethrows can occur.   Some information on how his system works can be seen here https://www.chessvariants.org/diffsetup.dir/fischer-random-setup.html The die I use to generate the random piece arrangement is a standard cube/hexahedron (one of the platonic solids).  O nly five or six throws of the die are needed to formulate one of the 960 starting positions. Rethrows add to the t
Read more

Fractal chevron

-
Image
I started with a chevron consisting of four equilateral triangles.  Each of those was then subdivided into nine smaller triangles, so that alternating bumps and notches could be applied to the centre of each side on the perimeter (for practical reasons I used a reverse approach, scaling up sides by a factor of three and reducing once done).  In theory, this process can continue indefinitely to produce complex fractal-like outlines.     There are left and right versions of the modified chevron, depending on which face is upward.  This means you cannot use both versions in the same tessellation.  Nine copies of each newly generated tile, can be put together to produce the next iteration.  Applying bumps and notches to even numbered polyiamonds, alters the tiling properties after the first iteration. There are four permutations for the chevron but only two for the modified versions, i.e., first and third from the left. These bumped and notched chevrons can be put together in six different
Read more