August 27, 1980  1:10 PM  John Warnock
changed MapperImpl.mesa to postmultiply vectors.

August 27, 1980  3:49 PM  Doug Wyatt
incorporated above Mapper changes

August 27, 1980  3:50 PM  Doug Wyatt
Note new convention: the rotational sense of polygons going through Pipes is now "positive" (i.e., anticlockwise). AltoDeviceImpl, ReducerImpl, AreaPathImpl, and EdgeImpl have been changed accordingly.

August 27, 1980  5:04 PM  Doug Wyatt
MapperImpl: fixed RInv bug; changed calling sequence of #Map, #Inv to modify v^ in place; changed INLINEs in Mapper accordingly; clients of Mapper are unaffected.

August 27, 1980  5:08 PM  Doug Wyatt
Modified GraphicsImpl.Rotate so that rotations by multiples of 90 degrees are exact.