Continued ANSIfication.
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
Added conditional declaration of atof()
eliminated atof declaration for NeXT
changed revision number for 2.0 release
minor bug fixes for system compatibility
set setscan.h into its own file
Initial revision
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