1vpTracePixel(3)            Library Functions Manual            vpTracePixel(3)
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NAME

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

9       #include <volpack.h>
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11       vpResult
12       vpTracePixel(vpc, trace_u, trace_v)
13           vpContext *vpc;
14           int trace_u, trace_v;
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ARGUMENTS

17       vpc    VolPack context from vpCreateContext.
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19       trace_u, trace_v
20              Intermediate image coordinates of the pixel to trace.
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DESCRIPTION

23       This  routine  is for debugging the rendering algorithms.  If (trace_u,
24       trace_v) is a valid set of coordinates in the intermediate image then a
25       printout  appears during rendering showing a trace of all of the voxels
26       that contribute to the pixel.  The intermediate image is not  the  same
27       as the final image; see vpGetvpSetImage(3).
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29       The  VolPack  library must be compiled with the -DDEBUG compiler option
30       for this function to have any effect.
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SEE ALSO

33       VolPack(3)
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37VolPack                                                        vpTracePixel(3)
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