Seeing the mention of the bit plugin in the most recent public release, a link or two may be handy.
This is quite a good list, especially the two “resources” parts, and looks to be an interesting page in its own right (only just discovered it myself):
http://chessprogramming.wikispaces.com/Bit-Twiddling
In particular, http://graphics.stanford.edu/~seander/bithacks.html and http://www.hackersdelight.org/basics1.pdf are great starting points and seem to complement one another well.
Bob Jenkins has a lot of material too, though one might have to sift a bit: http://burtleburtle.net/bob/hash/
I have some (useful?) Lua examples of my own:
https://github.com/ggcrunchy/LittleGreenMen/blob/master/utils.lua Not Corona (rather, LuaJIT + ANGLE), but a couple functions should be portable. CLP2 (ceiling log power of 2) might be useful to some… it rounds up to the next power of 2. Although not exactly well-documented otherwise, the 3-value Morton numbers have comments next to them showing how the bits get spread out during the interleave, showing where the “magic” numbers originate.
https://github.com/ggcrunchy/LittleGreenMen/blob/master/ray_slopes.lua Another one from the same project (unfortunately not as portable) with comments explaining (probably not well…) how a bunch of tests got converted into bitmasks / lookup tables.
I don’t know that there’s any reasonable way to incorporate them. But those ideas / methods are good to know… maybe future tutorial material?
https://github.com/ggcrunchy/corona-sdk-snippets/blob/master/bitwise_ops.lua A few Corona utilities (this one actually has some improvements coming, once I bring them in from another project) built on bitwise ops, including stuff from the above-mentioned Bit Twiddling Hacks and Hacker’s Delight.
Here and elsewhere in the SDK snippets project, I kludged my way around not having bit ops (if curious, search for files that do
local has\_bit, bit = pcall(require, "bit") -- Prefer BitOp
up front; some of those cases ought to be more elegant now that there’s support), but maybe some ideas can be gleaned anyhow.
Around 20 or so links were added this time, including a variety on BitOps, CoronaCloud and some other game tutorials. As so many were added this time, the recently added list below has been changed to include a variety of the latest!