This adds skewing support to Sparrow, which gives Sparrow the full set of 2D transforms that the Flash tool supports.
There's a tiny bit of extra overhead in SPRenderSupport.transformMatrixForObject:, since there's no gl function for the skew transform, but it's only incurred if you actually use skewing (it doesn't add any overhead to straight-up rotation).
Clarify rotation's relationship to skewX and skewY
implement skewing in SPRenderSupport.transformMatrixForObject:
Wow, that looks awesome! Thanks a lot for the pull request. I'll try that out and add it for sure. It's a very smart solution!
Great! (We also have a more-or-less identical change coming down the pipeline for Starling - you should get a pull request for that today, if you're interested).
Merge branch 'master' into skewing
I added this in Sparrow 2.0.