This distribution has the following directory structure.

distrib -------	radiosity   (A package to compute global
			|    illumination by Equilibrium based methods.)
			|
			-------- bin
		        |
			|
			-------- doc
			|
			-------- src
			|
			-------- scene --- originals
			 	      |
			 	      |
			 	      --- filter
						|
						|
						src
						|
						|
			 			preview  
			 			(a Radiance 
			 			 Input file previewer
			 			 on X11)
			 			  |
			 	         	  |-------- doc
		   	 			  |
		   	 			  -------- src
			 

The package has been developed under UNIX on a SUN-3
workstation. It has been ported to and tested on SUN-4 and DRS-6000
(a SPARC-RISC processor).

'make all' on distrib directory creates the executables.
The executables and their function has been given below.
More detail descriptions
are available in the respective 'doc' directories.
	rad      : A tool for computation of global illumination for
		   a 3D scene composed of polygon, sphere,
		   cylinder, cone and discs with plastic or
		   mirror surface properties and only diffuse
		   light sources.
		   Image formats supported are created in a UTAH-RLE,
		   Radiance Output Format and SUN-RASTER format.
	radfilter: An utility to convert a Radiance Input
		   scene description to a format suitable for
		   input to rad. Though 'rad' supports all the
		   geometric primitives of radiance, it
		   hardly supports any of the surface properties.
		   The only ones supported are diffuse without
		   highlight and mirror. So the filter does a
		   highly gross approximation of surface information in 
		   radiance input files to one of these two properties.
		   Example :
		   	All the light sources are assigned diffuse
				property.
			METAL is assigned mirror reflectance.
			Anything else is assigned pure 
				diffuse reflectance.
	preview  : A radiance input file previewer on X11 terminal.
		   Presents a wireframe form of the geometries.
		   Provides a minimal interface for scene composition.

Execution of 'rad' does not require any additional feature.
However, the execution of 'radfilter' and 'preview' require
that the Radiance utilities are available on the path.
Additionaly 'preview' requires X11 display terminal.

Bugs, suggestions and corrections may be directly send to me
(sumant@shakti.ncst.ernet.in, sumant@surya.ncst.ernet.in).
--------
Sumant N. Pattanaik
Graphics & CAD Division
National Centre for Software Technology