OT: Math Question ... Options

[SirAndy]

stupid question (what else is new) ...

while working on my 3D-Editor/Game Engine i came to realize that the default Rotation Matrix for OpenGL uses a counterclockwise winding for Rotations around the Y-Axis (Yaw), meaning if you look at a Object in the XZ Plane a Positive Angle will Rotate the Object Left, a Negative Angle will Rotate it Right.

This is Counter-Intuitive and i am wondering if there is a rule for this behavior in a Cartesian coordinate system or is this merely a "personal preference" for OpenGL ???

My editor currently uses the clockwise approach, where a positive angle rotates the object to the right instead, which seem much more intuitive.

searching the web, i have found both approaches, but i would like to know if there's a "corret" way to do it ...

(IMG:http://www.914world.com/bbs2/html/emoticons/type.gif) Andy

[Steve Thacker]

That's some deep doo-doo Andy..... you flipping developers kill me. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

Sounds like the rare matting call to attract Alfreds.

Almost like Jennette MacDonald and Nelson Eddy I'm calling yooooo hoooo (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif)


Sorry Andy I couldn't resist (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)