Added check for complete output with -r option
Added check for missing recover files
Made it so MODIFIER= line added to every header
Fixed argument checking
Fixed it so rtcontrib -M option searches RAYPATH directories
Fixe in rtcontrib -M option
Fixed array overrun with large number of modifiers
Added rtcontrib -M option to read modifier list from a file
Warning wording tweaks
Added warning & check for case where no output files exist with -r option
Implementaed rtcontrib -r (recover) option, added MODIFIER= + BIN= to header
Changed rtrace to default to Russian roulette ray termination
Minor optimization to reduce calls to getofile()
Added missing definition of PI for calcomp routines
Added binary i/o options to total and piped output to rtcontrib
Added RAYPATH directory searching to rtcontrib -f option
Added Russian roulette ray termination and fixed ambient weights & measures
Added missing include for signal.h
Fixed application of ray weights and coefficients in ambient calculation
Minor code tweaks
Made ASCII input more robust (one ray per line criterion relaxed)
Improved efficiency of queuing behavior to avoid idle process time
Got rtcontrib working and wrote basic man page
Created rtcontrib program for computing ray contributions and coefficients
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