Cocos2DXNA/cocos2d-xna — pull request #376 by totallyeviljake (2013-11-19 06:03:34+00:00)
Title: Fix for collisions between sprites that are defined in sprite sheets.

Prior version was using the full XNATexture dimensions for collision masking. This results in a huge degredation in performance when the sprite originates from a sprite sheet.