14783, 14862, 14921, 18607, 19537, 19852, and 19955 cause it too. Thirteen found bad seeds should been enough, right?
--- In [email protected], "Ryan Richards" <everetthigh@...> wrote: > > I make game cards ( http://ã¢ãã¡ã¤ãã .com/ ) and use the card's ID > number at the seed. Up to about 1800 so far. I was just looking through them > one day and saw number 514. I thought it might have been something to do with > the JPEG transcoding of the SVG so I redid it. It wouldn't go away. I > submitted a bug report to Batik and nothing happened, so I gave up on it. > After success in reporting a different bug in Firefox I thought I'd give this > one a try. I did test 0 - 9999, and transcoded to PNG. Sorting by file size > yielded the culprits. Checking the next 10,000 today. ASV is affected. Thanks > for the response. > > --- In [email protected], "David Dailey" <ddailey@> wrote: > > > > Wow! That is very odd. Firefox and Chrome show the squares in the same > > locations. > > > > > > > > Opera, which, along with IE/ASV, for years has had the most stable and > > complete implementation of filters, does not show the oddity, making me > > think it is an implementation problem. The last time I looked at Perlin > > noise (e.g., [1]), I didn't see anything that should cause those > > discontinuities. > > > > > > > > Safari doesn't seem to like SVG, as a general principle and, like IE9 shows > > a black rectangle. I haven't been able to test in ASV yet. > > > > > > > > That FF and Chrome and Inkscape would all behave the same way, suggest that > > they all just plugged in the same slightly flawed chunk of underlying source > > code. I would suggest submitting a bug report to Firefox and see what those > > folks think about the issue. > > > > > > > > Interestingly, it happens at all values of numOctaves. > > > > > > > > How did you find these funny numbers: 514, 1977, 2337, 4777, 8032, 9615 ? > > (They are not a sequence in the Encyclopedia of sequences [2] - I tried just > > on a whim.) Did you really try all 10,000 values of seed? A lot of times > > with things involving seeds, there is also a modulus, m, and if Euler's > > totient function of the seed and the modulus is other than m-1, then you get > > funky holes in the periodicity, but, from my experience, those holes are > > usually more numerous. > > > > > > > > Cheers > > > > David > > > > > > > > [1] > > http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise- > > math-faq.html > > > > [2] http://oeis.org/ > > > > > > > > From: [email protected] [mailto:[email protected]] > > On Behalf Of Ryan Richards > > Sent: Thursday, April 25, 2013 5:30 AM > > To: [email protected] > > Subject: [svg-developers] Seed 514 in feTurbulence causes squares > > > > > > > > > > > > Seeds 514, 1977, 2337, 4777, 8032, 9615 (only checked 0-10000) cause blank > > squares in feTurbulence in Firefox, Inkscape, and Batik. Is it the algorithm > > itself or the implementations? > > > > <svg version="1.1" width="338" height="488" > > xmlns="http://www.w3.org/2000/svg";> > > <defs> > > <filter id="Seed"> > > <feTurbulence type="turbulence" baseFrequency="0.1 0.1" numOctaves="5" > > seed="514"/> > > </filter> > > </defs> > > <path d="m0,0 h338 v488 h-338 v-488" filter="url(#Seed)"/> > > </svg> > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > ------------------------------------ ----- To unsubscribe send a message to: [email protected] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ----Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/svg-developers/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
