predicates:

placement
	on top of
	underneath
	beside
	around
	inside
	center of
	corner of
	against

negative predicates


spacing: padding around an object when it gets placed
	"arm's length"
	"body width"
	"near"
	"far'

some predicates carry notion of spacing like against, on top of while others do not like around.
	
concepts to know about:
	weapon -> sword, axe, club, staff, spear
	armor -> curiass, gauntlet, helmet, shield, pauldroon, greaves, boots
	clothing -> shirt, pant, skirt, hat, belt, dress, shoes
	jewelry -> ring, amulet, locket
	books
	furniture -> dresser, desk, table, shelf, chair, stool, cabinet
	containers -> chest, box, barrel
	ingrediants -> edible, chemical, mineral

so we start with an empty room which has walls, a floor, a ceiling, and doors (not stairs for now).

for each object get the [IsA] relationship from concept net
	
loop through the objects trying to place them from their [IsA] mappings depending on what's already
been placed.  
	possibly try to place large objects first -> generally dominate room, and most constrained
	in general, AI problem of constraint propagation; choose most constrained object to place first
	constraint is measured by placement predicates, and possible spacing predicates as well

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xml file:

 <tuple subject="chair" predicate="around" object="table"/>

want to include a negative flag? like

 <tuple subject="chair" predicate="center of" object="table" negated="true"/>
 <tuple subject="chair" predicate="around" object="table" negated="false" />

or maybe this is better

<not> <tuple subject="chair" predicate="around" object="table"/> </not>

other tags like

<must> <tuple subject="ring of wonder" predicate="inside" object="chest of wonder"/> </must>

perhaps positive will be enough?


place from most constrained to least constrained as measured by the number of tuples object is in
try to subject in order of specificity (how far from root of graph)

applying multiple constraints?  for now just start with one and make assumptions about them.

<and> 
	<tuple subject="candle" predicate="center of" object="table"/>
     	<tuple subject="candle" predicate="on top of" object="table"/>
</and>

data structures/objects and modules:

	Room representation that knows where the walls, floors, ceilings, doors are.
	The room also keeps track of what's been placed in it and where.  The room
	should also handle placement of objects.  Move those functions here.  Determines
	whether an object can be placed at the requested location.

	GameObject that represents a specific named instance of an object.
	
	AI/Common Sense placement module that keeps all the mappings and tries to place
	the objects in the room according to mappings.
		Mapping of subjects to list of predicate object pairs
		Mapping of predicates to appropriate function(s)
		Mapping of object to list of subjects ordered from most to least specific