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Computational Diversions: The Game of HullGrams

  • Computational Diversions
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Notes

  1. The convex hull of a set of planar points is the minimal convex polygon that contains all the points; if you're of a physical cast of mind, you could think of this as the shape that you would get by stretching a rubber band around the set of points and then allowing the band to "snap closed" on the points, wrapping around them. Algorithms for constructing the hull are a staple of computational geometry texts such as O'Rourke (1998).

References

  • Crawford, C. (2002). Tangram puzzles. New York: Sterling.

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  • Gardner, M. (1988). Time travel and other Mathematical Bewilderments. New York: W. H. Freeman.

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  • O’Rourke, J. (1998). Computational geometry in C (2nd ed.). Cambridge, UK: Cambridge University Press.

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  • Read, R. (1965). Tangrams: 330 puzzles. New York: Dover.

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Authors and Affiliations

  1. University of Colorado, Boulder, CO, USA

    Michael Eisenberg

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  1. Michael Eisenberg
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Correspondence to Michael Eisenberg.

Appendix: Solutions to puzzles in this column

Appendix: Solutions to puzzles in this column

Figure 4 puzzles

Figure 6 puzzles

Figure 8 puzzles

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Eisenberg, M. Computational Diversions: The Game of HullGrams. Tech Know Learn 16, 97–102 (2011). https://doi.org/10.1007/s10758-011-9178-x

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