Continued ANSIfication.
Instrumented headers against multiple inclusion and for use from C++. 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
changed revision number for 2.0 release
set setscan.h into its own file
got rid of negative angles
Initial revision
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