Computer Science – Computational Geometry
Scientific paper
1999-07-10
Computer Science
Computational Geometry
27 pages, 39 figures. Accepted to Computational Geometry: Theory and Applications. v3 incorporates several comments by referee
Scientific paper
A hinged dissection of a set of polygons S is a collection of polygonal pieces hinged together at vertices that can be folded into any member of S. We present a hinged dissection of all edge-to-edge gluings of n congruent copies of a polygon P that join corresponding edges of P. This construction uses kn pieces, where k is the number of vertices of P. When P is a regular polygon, we show how to reduce the number of pieces to ceiling(k/2)*(n-1). In particular, we consider polyominoes (made up of unit squares), polyiamonds (made up of equilateral triangles), and polyhexes (made up of regular hexagons). We also give a hinged dissection of all polyabolos (made up of right isosceles triangles), which do not fall under the general result mentioned above. Finally, we show that if P can be hinged into Q, then any edge-to-edge gluing of n congruent copies of P can be hinged into any edge-to-edge gluing of n congruent copies of Q.
Demaine Erik D.
Demaine Martin L.
Eppstein David
Frederickson Greg N.
Friedman Erich
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