[Bf-committers] New patch (19799) to add trackball rotation to the manipulator.

[Adrian Winchell]

Hi all,

Just submitted my first patch (19799) to the patch tracker, adding a 
trackball rotation loop to the rotation manipulator.
https://projects.blender.org/tracker/index.php?func=detail&aid=19799&group_id=9&atid=127
Works great, doesn't look that great due to overarching perspective 
issues in the transform manipulators - which I'm at a loss as to how to 
fix (the reference frame is pointed to face the screen, but moving Z+ 
still moves the loop significantly in screen X/Y if it's not in the center.)
Pictures and more details attached to the patch.

Because of that, I'm not sure if it's suitable for you to commit in its 
current state, but I'd appreciate any help with it, I'm waaay out of my 
league when it comes to matrix and vector math.

-- Adrian