Ansification and fixed typing/prototype of getheader() and its callback.
Fixed bug in glarendx pointed out by Phillip Greenup
Replaced most outdated BSD function calls with their posix equivalents, and cleaned up a few other platform dependencies.
Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
changed getheader() to listen to return value of passed function
changed location of erfc() declaration
Raphael added dgi, brs_gi, and ugr index calculations
added additional protection against acos() domain error
changed call to sscanview
changed revision number for 2.0 release
improved error reporting
added CGI (Einhorn) formula
minor bug fixes
ASCII -> ascii
made posindex() a little more robust
added format information to headers
corrected calculation of Guth F (average field luminance)
fixed spelling of "Guth" and added normalization to vectors
Initial revision
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