Retrieves a column from a 3x3 matrix.
Original signature is 'GLKVector3 GLKMatrix3GetColumn ( GLKMatrix3 matrix, int column );'
Available in OS X x0.8 and later.
public static GLKVector3 GetColumn (GLKMatrix3 matrix, int column) { GLKVector3 v = new GLKVector3 ( matrix [column * 3 + 0], matrix [column * 3 + 1], matrix [column * 3 + 2] ); return v; }