NAME

       xshowtrace - interactively show rays traced on RADIANCE image under X11

SYNOPSIS

       xshowtrace [ -s ][ -T ][ rtrace options ] octree picture

DESCRIPTION

       Xshowtrace  takes  a  RADIANCE  octree and a picture file and displays it on an X11 window
       server using ximage(1).  The picture should have been created from a previous rpict(1)  or
       rvu(1)  calculation using the given octree.  Once the image is displayed, the user can use
       the 't' command of ximage to select points on the image to display the ray  tree.   Rtrace
       then  produces  a ray tree, which xshowtrace will display (in red on a color screen).  The
       -s option slows the display of each ray traced to make it easier to  follow  the  process.
       The -T option traces rays to light sources, which are normally hidden.

AUTHOR

       Greg Ward

BUGS

       If  the  pointer  is  moved  between the time 't' is pressed and xshowtrace starts drawing
       rays, the rays will be displaced.

SEE ALSO

       oconv(1), rpict(1), rtrace(1), rvu(1), ximage(1)