Doc patch applied. The geometry diff you attached is related to negative zeros. I think you will find geometry_1.out will be a better match for you. I thought our code now automatically picked the proper geometry file. However, I can't find out how that file is used.
--------------------------------------------------------------------------- Sean Chittenden wrote: > Small patch that adds some documentation for the area() function. > Specifically, point out that intersecting points in a path will yield > (most likely), unexpected results. Visually these are identical paths, > but mathematically they're not the same. Ex: > > area | plan > ------ > +----------------------------------------------------------------------- > ------------------- > -0 | ((0,0),(0,1),(2,1),(2,2),(1,2),(1,0),(0,0)) > 2 | ((0,0),(0,1),(1,1),(1,2),(2,2),(2,1),(1,1),(1,0),(0,0)) > > The current algorithm for area(PATH) is very quick, but only handles > non-intersecting paths. I'm going to work on two other functions for > the PATH data type that determines if a PATH is intersecting or not, > and a function that returns the area() for an intersecting PATH. The > intersecting area() function will be considerably slower (I think it's > going to be O(n!) or worse instead of the current O(n), but that comes > with the territory). > > -sc > [ Attachment, skipping... ] > > > > PS Right now I'm developing on OS-X and there's a geometry regression > test that's returning -0. FWIW > > *** ./expected/geometry.out Fri Oct 31 19:07:07 2003 > --- ./results/geometry.out Thu May 27 22:16:58 2004 > *************** > *** 117,123 **** > | (5.1,34.5) | [(1,2),(3,4)] | (3,4) > | (-5,-12) | [(1,2),(3,4)] | (1,2) > | (10,10) | [(1,2),(3,4)] | (3,4) > ! | (0,0) | [(0,0),(6,6)] | (-0,0) > | (-10,0) | [(0,0),(6,6)] | (0,0) > | (-3,4) | [(0,0),(6,6)] | (0.5,0.5) > | (5.1,34.5) | [(0,0),(6,6)] | (6,6) > --- 117,123 ---- > | (5.1,34.5) | [(1,2),(3,4)] | (3,4) > | (-5,-12) | [(1,2),(3,4)] | (1,2) > | (10,10) | [(1,2),(3,4)] | (3,4) > ! | (0,0) | [(0,0),(6,6)] | (0,0) > | (-10,0) | [(0,0),(6,6)] | (0,0) > | (-3,4) | [(0,0),(6,6)] | (0.5,0.5) > | (5.1,34.5) | [(0,0),(6,6)] | (6,6) > > ====================================================================== > > > > -- > Sean Chittenden > > ---------------------------(end of broadcast)--------------------------- > TIP 7: don't forget to increase your free space map settings -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
