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)

RADIANCE                                             1/24/96                                             TRAD(1)