TRAD(1) 						      General Commands Manual							   TRAD(1)

NAME

       trad - graphical user interface to Radiance rad(1) program

SYNOPSIS

       trad [ rfile ]

DESCRIPTION

       Trad  is  a  graphical  user interface to rad(1), which controls the operation of the basic Radiance scene compiling, rendering and picture
       filtering programs.  Trad also includes links to a few utilities for displaying and converting results, but most of what  it  does  can	be
       done  by  editing  a small text file, called the "rad input file".  Scene creation still requires the use of a text or graphical editor, or
       translation from some external CAD format.

       Trad is based on the Tcl/Tk wish(1) "windowing shell" written by John Ousterhout.  (See below for instructions on installing  this  package
       if you do not have it already.)

       The  trad  interface  divides  the  rendering  problem into seven screens: File, Scene, Zone, Views, Options, Action and Results.  The File
       screen is used to load and save rad input files (a.k.a. project files).	The Scene screen is used to name the Radiance input files  associ-
       ated  with a particular project.  The Zone screen is used to assign rad variables specific to the section of the model being rendered.  The
       Views screen is used to define specific views to be rendered and set the picture file names and dimensions.  The Options screen is used	to
       adjust rendering quality and other parameters.  The Action screen is used to initiate interactive and batch renderings.	The Results screen
       is used to display, convert and print the rendered Radiance pictures.

       If trad is called with no rad input file name on the command line, it will start with the File screen and you must enter  a  valid  project
       file  before  you  will	be  allowed  to  continue.  If rfile is given, then trad attempts to open this file.  If no such file exists, trad
       assumes you are creating a new file by this name and goes to the Scene screen so you may identify the appropriate Radiance input files.	If
       the  file  exists  but not all renderings have been finished, trad goes first to the Action screen, assuming you will want to do something.
       If the file exists and all renderings have completed and are up-to-date, trad goes to the Results screen so that you may examine the  final
       pictures.

       Trad includes an extensive help facility, which may be accessed either by pressing the "HELP" button and searching through the category and
       topic menus, or by holding the Control key and pressing the left mouse button on the mysterious widget (i.e. the button, entry  window,	or
       list box you are curious about).

INSTALLING TCL
/TK
       The  Tcl/Tk  package is available by anonymous ftp from ftp.smli.com (204.153.12.45) in the /pub/tcl directory.	(Tcl stands for "Tool Com-
       mand Language," and is pronounced "tickle".)  Trad is based on Tk release 4.0, which in turn is based on Tcl release  7.4.   Although  trad
       uses only the wish program from this package, wish itself depends on additional Tcl and Tk libraries, and the two toolkits must be compiled
       one after the other.

       To compile the Tcl/Tk package, download the files "tcl7.4.tar.Z" and "tk4.0.tar.Z"  and	uncompress  and  untar	them.	Then,  follow  the
       instructions  in the README file in the tcl7.4/ directory to configure the Makefile for your system and install the software.  (Usually, it
       is best to do this as root or have it done by your system administrator if you do not have root privileges.)  Then,  do	the  same  in  the
       tk4.0/ directory.

       Trad should run without modification once this is done correctly.

AUTHOR

       Greg Ward
       wish and Tcl/Tk language by John Ousterhout

SEE ALSO

       oconv(1), pfilt(1), rad(1), rpict(1), rvu(1), wish(1), ximage(1)

RADIANCE
							      1/24/96								   TRAD(1)