Prepare for SCons build on Win32 and Win64
Changes to support new Cmake build system
Fixed prototype for freemtl() to match function pointer in lookup.h
Instrumented headers against multiple inclusion and for use from C++. Moved includes in headers out of "C" scope.
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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Added check for mesh primitive and warning when encountered
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
modifications to avoid problems with redeclared BYTE type
change lightid to glightid and made global for convenience
Initial revision
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