NAME

       vpTracePixel - print a trace of the voxels composited into a pixel

SYNOPSIS

       #include <volpack.h>

       vpResult
       vpTracePixel(vpc, trace_u, trace_v)
           vpContext *vpc;
           int trace_u, trace_v;

ARGUMENTS

       vpc    VolPack context from vpCreateContext.

       trace_u, trace_v
              Intermediate image coordinates of the pixel to trace.

DESCRIPTION

       This  routine is for debugging the rendering algorithms.  If (trace_u, trace_v) is a valid
       set of coordinates in the intermediate image then  a  printout  appears  during  rendering
       showing a trace of all of the voxels that contribute to the pixel.  The intermediate image
       is not the same as the final image; see vpGetvpSetImage(3).

       The VolPack library must be compiled with the -DDEBUG compiler option for this function to
       have any effect.

SEE ALSO

       VolPack(3)