restricted mouse projection to floor and refactored some init code into methods
switched the box with a 'ghost' model that follows the cursor
tweaking collision detection - not yet working
collision detection hacking
got basic(box) collision detection working
added ghost with collision
improved collision precision
fixed placing buildings with visible bounding volumes
made ghost change color on collision detection
made boundingvolume around ghost completely transparent, removed test wall
refactored part of collision detection to be more efficient
fixed some bugs and cleaned up the code