Stoney’s ZoneStoney's Zone - Thoughts about stuff

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.
A 1 AC AD A5 A7 BC BE B1 CD C5 DB DC D0 ED E5 E7 FA 1D 1F 15 17 0F 01
02 50 7A 7B 71 70 75 ABC ABE AB5 ACE AC7 ADA ADD AD0 AD5 AD2 AF7 A1D A55...

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.
Everyone knows 0xDEADBEEF and 0xCAFEBABE, but I wondered what else was available, so I wrote a short Lisp program to run through the standard Unix English dictionary and extract the usable words. I’ve included substituting 1 for I and 0 for O. There...

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.
I found that the formula for the polar decomposition, on page 3, produces rotation matrices that don’t account for diagonal axis flipping (swapping x with y). The article seems to factor out the flipping, but I didn’t want to have a fourth component...

Casper Fabricius has a nice shell script for creating new git repositories on DreamHost. Unfortunately, this works only for creating new repositories.
I already have a lot of local git repositories, and this seemed like a much better way to back them up off-site than using github or similar. This is useful only for repositories without collaborators, of course....