cocos2d/cocos2d-swift — pull request #1027 by thayerandrews (2014-10-15 00:01:39+00:00)
Title: CCEffectRenderer - Fix computation of texture coordinate extents

I wasn't accounting for sprite rotation within sprite sheets which could cause the
extents to become negative which invalidated subsequent "Am I fetching outside
the footprint of this sprite?" calculations. This addresses issue #1024 (aka spritebuilder/SpriteBuilder#969).