Another day, another set of Siggraph papers. The first paper session today concerned clever things to do with shapes. The first paper was Making Burr Puzzles From 3D Models by Shiqing Xin, Chi-Fu Lai, Chi-Wing Fu, Tien-Tsin Wong, Ying He, and Daniel Cohen-Or. A Burr Puzzle is a collection of puzzle pieces that only fit together one particular way, in a particular order, to create the final shape. Once the last piece is inserted, the entire puzzle holds together. These puzzles are very popular in China and Japan. Currently, most Burr Puzzles are designed manually. The paper proposes a way to automate the process. The canonical design of the puzzle, a set of six interlocking beams called a knot, was developed in Germany in the late 160
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