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
       associated 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 Command 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)