Use GLKVector3 object to store the coordinates of the node.
Add error handling class method.
Add OIMPersonPath class.
Add relation methods for OIMRect.
Update path-finding method.
Update OIMPerson class.
Fix the currenGrid bug.
Add draw method for debugging.
Update for final testing.
Make the GNodeArray property temporarily public for debugging,
Post a notification when init() done.
Project update. Alpha testing.
The route is integrated into OIMPerson class.
OIMRoom now conforms to NSCopying protocol.
OIMPath now conforms to NSCopying protocol.
Add OIMTexture class to manage OpenGL texture.
Add OIMTarget class to show the final position of a person.
Can convert the map position to CG position.
Add fcmp2() function to check if the given a is in range(min, max)
Fix the memory leak when destroying a list.