Fixed problems with normals and orientations that disagree.
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 check for flat triangles with normals
moved barycentric routines into tmesh.c
cosmetic fix to parameters of put_baryc
further reduced complexity and size of barycentric calculation
removed gensurf quadrilateral code to make smoothing work better
bug fix in vnew()
a few enhancements, a little beautification
initial bug fixes
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