OBJECTS

I have the following suggestions for object coordinates, which should
be made more specific with overall dimensions in a comment at the top
of each file:

Furniture:		Units = meters
			[The following is described looking from "back"]
			(0,0,0) located at bottom back left corner
			X-axis directed towards "right"
			Y-axis directed towards "front"
			Z-axis directed up

Knick-knacks:		Units = meters or centimeters
			Orient the same as furniture except (0,0,0) can be
			at center of rest point (ie. bottom) if object has
			high degree of radial symmetry (eg. a vase or cup).

Fixtures:		Units = meters
			[Present right-handed version only, ie. hinge
			on right means pull fixture towards you on left]
			(0,0,0) at lowest hinge or mount point if there is one,
				highest mount point if it is a ceiling fixture
			X-axis in plane of fixture, towards handle side if one
			Y-axis out of plane
			Z-axis up

Buildings:		Units = meters
			(0,0,0) located at the ground level of SW corner
			X-axis directed towards "East"
			Y-axis directed towards "North"
			Z-axis directed up

Plants:			Units = meters
			(0,0,0) located where ground meets plant (ie. the root)
			Y-axis directed "North" for phototropic plants
			Z-axis directed up

People (standing):	Units = meters
			(0,0,0) located at ground under center of gravity
			X-axis points to person's right
			Y-axis points in person's forward direction
			Z-axis directed up

People (sitting):	Units = meters
			(0,0,0) located at rump under center of gravity
			X-axis points to person's right
			Y-axis points in person's forward direction
			Z-axis directed up

People (laying):	Units = meters
			(0,0,0) located at back of the head
			X-axis points to person's right (left if prone)
			Y-axis points towards feet
			Z-axis directed up

Animals (excl. people)	Units = meters
			(0,0,0) located at rear (ground level if land animal)
			X-axis pointing to animal's right
			Y-axis to animals front
			Z-axis directed up

Objects should be collected in compressed tar files, one such file per
contributor.  It would be too messy to have one tar file for each object,
since each person might contribute several objects, and everyone has
an object called "chair".