stoney.sb.orgStoney's Zone - Thoughts about stuff

Stoney’s Zone Archives Links Welcome to Stoney’s Zone The Even-more Complete List of Hex Words I 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. December 24, 2009 The Complete List of Hex Words While 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. December 18, 2009 2D Matrix Decomposition This 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. July 10, 2009 Mirroring git respositories to DreamHost Casper Fabricius has a nice shell script for creating new git repositories on DreamHost. Unfortunately, this works only for creating new repositories. June 11, 2009 Defining new format wrappers in Mathematica One problem I had with the expression-to-C converter is that CForm converts negations of terms into a negation of parenthesized terms. June 3, 2009 Converting symbolic Mathematica expressions to C code I 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. June 2, 2009 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. December 29, 2008 Pixel-perfect Graphics, Revisited Mathematica 7 introduces a new Image function that eliminates all the hassle previously necessary to create and export pixel-perfect raster images. November 25, 2008 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 rather than 0 in alternating pixels. September 8, 2008 Exporting Pixel-Perfect Graphics in Mathematica I keep having to figure out how to export pixel-perfect raster images from Mathematica, which I use for test images with my software. I found that it’s simpler to use ArrayPlot than Raster now, so I’m documenting this for my future use (and any one else’s). September 2, 2008 Older Posts → Stoney’s Zone Proudly powered by...