Robert J Lang
On January 7 and 8, 2025, Los Angeles was hit by a series of wildfires, driven by Santa Ana windstorms with gusts of 60 mph and more. One of them, the Eaton Fire (so named because it started near Eaton Canyon), destroyed the town of Altadena, which sits between Pasadena and the San Gabriel mountains. [ ]
A version of this article previously appeared in OrigamiUSA s The Fold online magazine. Perhaps you ve heard that there are professional origami artists. Yes, there are a few: myself, Joseph Wu, Michael LaFosse, Paul Jackson, and Sipho Mabona for starters. (And lots of others: if I ve left you out, my apologies it s assuredly not a complete list.) [ ]
This page contains links to computational tools useful for origami design and for combining origami with mathematical or scientific applications. See here for additional links about origami math, science, and technology. See here for additional links not specifically related to mathematical and scientific origami. If you ve got a computational origami tool you d like listed, send [ ]
I am regularly asked if I would create video instructions for my origami designs. Sorry, I m not currently set up to make such videos myself. However, if you re a videographer and would like to hire me to demonstrate and/or do hand-modeling of folding (something I ve done several times for commercial clients), please contact me and [ ]
These images show what the (first) 54 polypolyhedra would look like if created using the Ooh and Ow unit joints (Ow being Francis Ow s mechanism for joining struts at angles up to 90 degrees, Ooh being my own similar mechanism for larger angles). Polypolyhedron 1. Polypolyhedron 2. Polypolyhedron 3. Polypolyhedron 4. Polypolyhedron 5. Polypolyhedron 6. [ ]
These images show what the (first) 54 polypolyhedra would look like if created using round dowels of the maximum possible diameter. Polypolyhedron 1. Polypolyhedron 2. Polypolyhedron 3. Polypolyhedron 4. Polypolyhedron 5. Polypolyhedron 6. Polypolyhedron 7. Polypolyhedron 8. Polypolyhedron 9. Polypolyhedron 10. Polypolyhedron 11. Polypolyhedron 12. Polypolyhedron 13. Polypolyhedron 14.…
Background In 1999, I became interested in a family of origami modulars composed of interwoven polygonal frames and/or polyhedral skeletons, the most famous of which was devised by Tom Hull, which he titled Five Intersecting Tetrahedra, now commonly known by its abbreviation, FIT. (See here for a description.) The underlying polyhedron a compound of five tetrahedra [ ]
This page contains various and sundry links to web pages that combine origami with mathematical or scientific applications. See here for links related to computational origami (software for origami design and analysis). See here for additional links not specifically related to mathematical and scientific origami. Please let me know if you find any broken links [ ]
This page contains various and sundry links to international origami societies and other origami resources on the web. See here for links relating specifically to mathematical and scientific origami. Please let me know if you find any broken links. Origami Societies These are the largest international origami societies. The linked pages also have links to [ ]
In the design of optical systems that incorporate multiple reflections of converging and diverging beams, tedious graphic layout procedures are followed to assure that mirror dimensions are correct and that structural elements do not interfere with the ray bundles. A change in dimension, location, or angle of any one of the system elements requires a [ ]