Hello Diego, Diego Nicola Barbato <dnbarb...@posteo.de> writes:
> Hey, > > Diego Nicola Barbato <dnbarb...@posteo.de> writes: > > [...] > >> Apparently there is nothing wrong with the slider. Instead matrix >> multiplication, which is used under the hood for transformations, seems >> to sometimes produce incorrect results on i686-linux. I have reported >> this as a separate bug (https://debbugs.gnu.org/41665). > > I got this wrong: This issue isn't caused by the Numpy bug, since > Matplotlib doesn't use Numpy for transformations. Both bugs are caused > by the excess precision of the x87 FPU's floating point registers. > > I've attached a patch which makes sure that the C and C++ extensions are > compiled with -ffloat-store. This doesn't get rid of all possible > rounding errors but it's enough for the slider test to pass. Thanks for the investigationd and workaround! I've tested it and it seems to work well. I've pushed a slightly modified version to master as commit 81643c4cf3e61f5a98b92a72a92c230f5e7ca905. Thank you! Closing. Maxim
