NAME	WIND PLOT -- create a geometry for wind speed data 

AUTHOR	Kathy Pearson, MCNC, kathyp@mcnc.org, (919) 248-9240

SUMMARY

	Name		WIND PLOT	

	Type		mapper	

	Inputs		input_field	(field 2D 3-vector uniform float)	
			slice axis	(string)
			input_color_map	(colormap OPTIONAL)

	Outputs		geom_output	(geometry)

	Parameters
			Name			Type	Def	Min	Max
			----			----	---	---	---
			Wind Max		(float) 15.0	UNBOUND	UNBOUND
			Draw Arrows		(toggle)   1	0	1
			Fixed Lengths		(toggle)   0	0	1

DESCRIPTION

The WIND PLOT module accepts as input a field 3-vector wind field and outputs
a geometry representation of it.

INPUTS

input_field		input wind field of x-y-speed

slice axis		"X", "Y", or "Z" slice axis

input_color_map		standard AVS input color map, optional

OUTPUTS

geom_output		geometry wind field output, optionally colored

PARAMETERS

Wind Max		scale in meters/second against which barbs not of
			fixed lengths are measured

Draw Arrows		switch indicating if an arrowhead should be added to
			each wind barb

Fixed Lengths		switch indicating if barbs/arrows should be of fixed
			lengths instead of scaling each to the speed

EXAMPLE

RELATED MODULES

LIMITATIONS

This module is very limited.  It is written as a demo for the alpha
prototype data and its scope should be expanded.

SEE ALSO

(MCNC Visualization Plan)						11/93
-------------------------------------------------------------------------
The MCNC Environmental Programs Group has created this module as part of a
suite of AVS demo modules, networks, and sample data sets to demonstrate 
the functionality of its visualization prototype for an Environmental 
Decision Support System (EDSS).  This system provides a unified method of 
analysis and visualization for data output from different environmental air 
quality models.  Remotely, standard output files from the following models 
can be read into AVS:

        ROM (Regional Oxidant Model)
        RADM (Regional Acid Deposition Model), low res and high res
        RADM (Regional Acid Depostion Model) Emissions, low res
        UAM (Urban Airshed Model, regulatory version)
        UAM (Urban Airshed Model, AREAL research version)
        UAM Wind (Urban Airshed Model, regulatory version)
        MCNC ALPHA-Prototype netCDF files

Alternatively, xdr portable binary AVS fields can be created from these
data types and accessed directly from the local workstation.

You can download these modules individually from the IAC using anonymous
ftp to the appropriate directories /avs_modules at avs.ncsc.org.  
If you would like to download the entire suite of modules, networks, and
sample datasets at the same time, the IAC recommends that you use 
anonymous ftp to grab the following file from avs.ncsc.org -

/sample_data/avs_data/MCNC_Env_Pgms/MCNC_Env_Pgms.tar.Z

This contains all source code to all local and remote modules, as well as
all of the sample datasets, networks, documentation, installation, and
usage notes.
-------------------------------------------------------------------------