Wrote closestapproach() function to find closest point for two rays
Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h
Abstracted process and path handling for Windows. Renamed FLOAT to RREAL because of conflict on Windows. Added conditional compiles for some signal handlers.
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Replaced inline copyright notice with #include "copyright.h"
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 VSUB(), VADD() and VCROSS() macros
added VLEN(v) macro for vector magnitude
Removed problematic math function declarations
changed FTINY for SMLFLT
increased value of FTINY with SMLFLT
updated revision number for release 2.0
added FLOAT definition to better control size of structures
added FLOAT definition for vectors and matrices
Initial revision
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