Datar's can build tessellations either with a polygon centered at the origin, or with a vertex at the origin and can also tessellate "motifs" (polygons or polylines such as Escher's fish). Datar's program offers more flexibility than Joyce's applet: e.g. There is also code that goes with it, which I have not yet looked at. I found the explanations in Ajit Datar's master's thesis the most helpful for learning how the process of generating the tessellations works. It's much less efficient than Hatch's code, but efficiency is not one of my requirements at this point. This applet draws regular and quasiregular tessellations organized by polygons, so it's easy to put print statements into the update() method and output the locations of vertices of each polygon as the polygon is drawn. The most helpful solution I've found for my need - cranking out the locations of vertices of each polygon - is David Joyce's Hyperbolic Tessellations applet and its source code. But they're grouped by line segment rather than by cell, and converting from the former to the latter does not seem easy. I can extract these vertex coordinates by putting in print statements. I just found some source code for drawing hyperbolic tilings (see bottom of the page), which includes generating locations of vertices. I'd also be interested in hyperbolic tilings besides Escher's, e.g. If an algorithm could help me generate $k$ rings of cells around the origin, that would be most convenient. I want to generate a finite area of the plane (of course?). But I don't know how to do it.ĭo you know of software to do this? Or can someone help me with an algorithm? I don't need to generate fish, just quadrilaterals. the formula to convert those coordinates to the Cartesian plane, using the Poincare Disk model.įor example, in Circle Limit I, each fish seems equivalent to a quadrilateral (four other fish touch its edges), and each vertex is surrounded by either 4 or 6 fish. a way to generate the coordinates in the hyperbolic plane, for each vertex of several cells (polygons) in such a tiling and.What I want to do is generate the coordinates (in the Cartesian plane, for a graphics display) of vertices in such a tiling. Escher's "Circle Limit" drawings, which use a Poincare disk model to illustrate tilings of the hyperbolic plane. I'm a computer programmer, and while I like math, this is an area where my understanding of math falls short of what I need in order to apply it successfully.
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