-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07-12-11 19:46, Neil Toronto wrote: > I just pushed a change that should keep it from raising an error. > Can you get the latest and try it? If there's no error, will you > please send me (personally, not the list) a screenshot of the > result?
The error is gone now, and I will send you a screenshot privately. Interestingly, after playing with it for a while, suddenly when I run it the plot produced has a different viewing angle and dragging it is actually working. Unfortunately I cannot yet reliably reproduce this. So maybe this is some initialisation problem? The way I test, I start up a fresh drracket, load up the file and run it. > Could you also try this? > > #lang racket (require plot racket/flonum unstable/flonum) (plot > (function sqrt 0 (* 40 +min.0))) (plot (function (compose flsqrt > exact->inexact) 0 (* 40 +min.0))) > > Both plots should be identical and look like staircases. This works and I get the two identical staircases. Further selecting an area to zoom in to and back out works as well. On a closer inspection I notice that some of the vertical parts of the stairs are slanted after zooming in (will send screenshots privately). > The thing is, the error shouldn't be happening at all. As far as I > can tell, it happens because at least one surface normal of a > polygon that makes up the plot has a +nan.0 in it. > > That *could* happen if your machine's floating-point processor is > pretty b0rked - for example, if it returned +nan.0 for square roots > of very small numbers. (Or possibly Racket on your machine, for > some reason, computes things like that wrongly.) Have you had > floating-point problems with anything else? Not that I have noticed. Also the numeric tests seem to complete without any errors. Marijn -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7nYwcACgkQp/VmCx0OL2zukQCfekGL3loKA0R283YC8ZrmLJoR Q3AAoIvZ+oJU/Qo5UtXJAAmsfyHeqPwH =EkDe -----END PGP SIGNATURE----- _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
