2010/3/14 Rado <rki...@gmail.com>: > Hello, > > I have the following simple http://www.math.uiuc.edu/~rkirov2/files/escher.py > code in pure Python (using the python image library) that produces > Droste effect pictures like this one > http://www.math.uiuc.edu/~rkirov2/files/spiral.jpg > . I wrote the code over 2 years ago in java. Recently, I found > mathematica implementation > http://blog.wolfram.com/2009/04/24/droste-effect-with-mathematica/, > so I am wondering how to implement it more efficiently in Sage. The > script above works but doesn't use any of the Cython speed-up, so it > takes a minute or two for moderately sized images. Also if it gets > fast enough to produce the images, one can make cool movies by adding > an offset time variable. > > To learn more about the original picture by M.C. Escher that inspired > it all you can read this article by H.W.Lenstra. > http://www.ams.org/notices/200304/fea-escher.pdf. > > Rado > > PS. William told me how to call optimized complex functions, but I > can't find the right syntax. Is it in the Sage manual?
If f is a symbolic expression, use g = fast_callable(f, CDF) to make a fast verison. William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
