I want to distinguish some horizontal parts(aisles) in my scene from rest of the horizontal parts(All of this is part of scene and not separate objects). These horizontal parts will do things selectively when clicked, One way to do this is to take coordinates of these parts and do stuff selectively for these parts. Other way is to name these separately as submeshes and handle these while ray casting.
Although submesh will work in theory, how exactly should I approach it in the best possible way. How should I make separate submeshes in bender, what exactly is a submesh and how well I would be able to handle submeshes in blender?? Will I be able to get bounds? rotate them etc?? Can I tweak some code in sources to make all this happen??