Thanks for sharing. It will very useful track each problem to GWT issue tracker.
2014-08-12 13:09 GMT-03:00 Oskar Stangenberg <crokok...@gmail.com>: > Hi guys, we are developing a GWT-project with a lot of shared files. We > discovered a few discrepancies in the gwt-math and server-math and wanted > to share them for anybody else having those issues: > > - First and foremost: all native double calculations are identical (+ > - * / %) > - All trig-functions (sin,cos,tan,asin,acos,atan,atan2) seem to > produces slightly different results. We recommend doing your own impl using > lookup-maps > - sqrt,log and pow seem to be identical although we only tested sqrt > thoroughly > - As far as we know all functions like max,min,abs etc are identical > - toDegrees and toRadian are actually different because GWT uses a > constant for 180./PI and PI/180. which changes the order of operation > compared to java > - For serialization of doubles we strongly suggest using > Double.doubleToLongbits and Double.longBitsToDouble. You can additionally > use Long.toString(long,32) and Long.parseString(string,32) to compress the > String-representation > > I hope we can help some people with this info. Especially the > toDegrees/toRadians was very surprising to find. This issue was reported > though and might be fixed in a future GWT-version (we tested 2.6.1). > In case you are interested how we solved the issues here is the > open-source-part > of our project > <https://xp-dev.com/sc/182005/HEAD/%2FGWTCommon%2Fsrc%2Fcom%2Funiverseprojects%2Fcommon%2Fshared%2Fmath> > so > you can check it out > Regards > Oskar Stangenberg > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to google-web-toolkit+unsubscr...@googlegroups.com. > To post to this group, send email to google-web-toolkit@googlegroups.com. > Visit this group at http://groups.google.com/group/google-web-toolkit. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
