BennyQBD/3DGameEngine — pull request #22 by qqwe61946 (2014-08-28 09:12:35+00:00)
Title: Update Matrix4f.java

Hi benny.
Is the rotation matrix Y correct?
I study OpenGL by your tutorial. so I don't know correct answer.

http://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations