On Wed, Jun 14, 2006 at 08:01:53PM +0200, Mateusz Loskot wrote: > Sandro, > > Your test case is incorrect. > You can't compare float numbers as you are doing it in the assert: > > assert(tot_check==tot); > > especially if you're working with multiplatform library as GEOS. > You can only test how close are both numbers. > > There are many problems. float arithmetic on Intel CPUs deos not follow > IEEE 754, different representation of float numbers on varios > architectures: FPU calculations are made on 80 bits numbers (ext. > double) but SSE2 instructions on 64 bits.
Ok, but equality is actually used in JTS too. Does Java have an automatic approximate equality ? Beside this, the XML testcase I have attached should then represent a valid testcase and should be made to work with the current "sloppy" fp condition. Problem is that I suppose JTS won't raise the same problem (having different fp threatment). --strk; _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
