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 rtrace behavior to send bogus record when ray dir==0
fixed aspect on spherical divisions
fixed bug in calculation of ring sample positions
minor optimization in long-enough edge determination
minor improvement to check ALL edges for possible u vector in face
made off-axis polygons sample better
changed so light below threshold is printed as ordinary object
updated revision number for release 2.0
reset errno at appropriate points
fixed distribution pattern discontinuity
added b variable for minimum brightness
interpret d=0 to mean diffuse source changed peano() calls to multisamp()
changed from urind() to peano() for n-dimensional sampling
added zeroing of position set as tag to rtrace
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test debugging
visual debugging pass
first version of mkillum
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Initial revision
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