Stoney’s ZoneThoughts about stuffHomeAbout MeArchivesLinksSwitcherThe Even-more Complete List of Hex WordsDecember 24th, 2009Comments Off on The Even-more Complete List of Hex WordsI realized that I was being insufficiently lee7, so I added S, T, and Z, converting into 5, 7, and 2. This produced a much longer list, of course.Read more…Computers, SoftwareThe Complete List of Hex WordsDecember 18th, 2009Comments Off on The Complete List of Hex WordsWhile converting some code to 64-bit on Snow Leopard, I discovered that character literals are ints, so I couldn’t use them for 8-byte longs. The alternative is readable hex constants.Read more…Computers, Software2D Matrix DecompositionJuly 10th, 2009Comments Off on 2D Matrix DecompositionThis demonstrates the polar decomposition of 2D matrices into their angle, scale, and shear components. The polarDecomp algorithm is taken from Shoemake & Duff “Matrix Animation and Polar Decomposition“, 1992.Read more…Computer Graphics, MathematicaMirroring git respositories to DreamHostJune 11th, 2009Comments Off on Mirroring git respositories to DreamHostCasper Fabricius has a nice shell script for creating new git repositories on DreamHost. Unfortunately, this works only for creating new repositories.Read more…Softwarebackup, bash, dreamhost, git, script, shellDefining new format wrappers in MathematicaJune 3rd, 2009Comments Off on Defining new format wrappers in MathematicaOne problem I had with the expression-to-C converter is that CForm converts negations of terms into a negation of parenthesized terms.Read more…Languages, Mathematica, SoftwareConverting symbolic Mathematica expressions to C codeJune 2nd, 2009Comments Off on Converting symbolic Mathematica expressions to C codeI frequently use Mathematica to rearrange or solve symbolic equations to use in C++ programs. While Mathematica is quite powerful for that, it has no facility to hoist common subexpressions into variables.Read more…Languages, Mathematica, SoftwareAdding a keyboard shortcut to Mathematica V7December 29th, 2008Comments Off on Adding a keyboard shortcut to Mathematica V7(updated 2009-03-23 to add the backslashes that disappeared between my blog editor and WordPress)In Mathematica, typing index brackets is clumsy, as one has to type esc-[[-esc then esc-]]-esc. I found a way to modify the Edit menu to add a shortcut for this. Read more…Languages, Mathematica, SoftwarePixel-perfect Graphics, RevisitedNovember 25th, 2008Comments Off on Pixel-perfect Graphics, RevisitedMathematica 7 introduces a new Image function that eliminates all the hassle previously necessary to create and export pixel-perfect raster images.Read more…Computer Graphics, Languages, Mathematica, SoftwareWhat is a sampling test image?September 8th, 2008Comments Off on What is a sampling test image?I was asked what the purpose is of the test image in my previous post, and why the alpha was set to 0.01 rath