AVS Modules							Field grid
US EPA Scientific Visualization Center				July 1, 1992

NAME
	Field grid - generate labelled grid and/or axes for field

SUMMARY
	Name	Field grid
	Type	Mapper
	Inputs	Data	 -	field 
	Outputs	GridGeom - 	geom

	Parameters
	Name		Type		Default	Choices
	Spacing		dial	 	0.00	 0.00 -	10000.00
	Plane		radio buttons	NONE 	NONE : I : J : K
	Show Labels	toggle		off	off : on
	Show Grid	toggle		off	off : on
	Show Axes	toggle		off	off : on
	Position	radio buttons	Origin	Origin : Min : Max

DESCRIPTION
	Generates a labelled grid and/or axes for field data. The
	extents of the grid or axes are the extents of the data
	(or slightly larger). 

INPUTS
	Data - field
	Input field determines the size of grid or axes which will
	be generated.

PARAMETERS

	Spacing (dial)
	This dial controls the spacing of grid lines. The units are
	the same as the coordinates of the data.

	Plane (radio buttons)
	The grid will be generated in only one plane. These buttons
	select which (if any). The buttons are labeled according to 
	the axis perpendicular to the two defining the plane in which
	the grid will lie. For example, selecting Z will generate a
	grid in the XY plane.

	Show Labels (toggle)
	Turn numberic labels on and off.

	Show Grid (toggle)
	Turn grid on and off.

	Show Axes (toggle)
	Turn axes on and off.

	Position (radio buttons)
	Select grid and axes positions at origin, minimum of data
	space, or maximum of data space.

OUTPUTS
	GridGeom - geom
	Geometry containing grid/axes/label object.

EXAMPLE NETWORKS
	This network generates an isosurface and a labelled grid 
	from field data.

			read field
			   |
		   -----------------
		   | 		   |
		Field grid	isosurface
		   | 		   |
		   -----------------
			   |
		    geometry viewer

RELATED MODULES
	Modules which generate the field input:
	  read field
	  read points
	Modules which process the geom output:
	  geometry viewer
	  render geometry

SEE ALSO
	UCD grid
AUTHOR 
	Penny Rheingans
	US EPA Scientific Visualization Center