On Sat, Oct 3, 2009 at 4:04 PM, Peter <peter.jip...@gmail.com> wrote: > > Hi, > > Thanks to the pointer to Pre3d it is now possible to do shaded > surfaces (and lines and curves) on canvas in JavaScript. The > performance is not quite like jmol, but it is far better than I would > have expected (especially with Chrome), and it has the advantage of > working on the iPhone (and perhaps Android
Oh my god!! This http://sage.chapman.edu:8001/home/pub/5/ is amazing. I had no idea this was possible. WOW. We have to get this into sage ASAP. I think with some more work this should someday be the default (!), given how much trouble people have showing 3d jmol plots with sage -- I ran several workshops this summer, and 3d plots were by far the flakiest part of each workshop. Many thanks for working on this! William >. -- can someone with an > Android phone please check?). The surfaces display in IE, but mouse- > tracking is erratic at the moment. Texture mapping is also possible, > but not yet exposed to Sage. > > See http://math.chapman.edu/~jipsen/canvas/pre3d/demos/sage2pre3d.html > for a standalone html version, > > or http://sage.chapman.edu:8001/home/pub/5/ for (lots of) surfaces > produced by Sage > > (try putting that many jmol applets on one html page :-) > > I have modified the Pre3d .js files to be a drop-in replacement of > canvas3d_lib.js. Basically this meant combining them into a single > file called canvas3d_lib.js, adding code to parse Sage json files, > extending Sage and Pre3d to handle lines, opacity, and tweaking Pre3d > to shade both sides of the surface etc. > > In order to be efficient, Pre3d takes some shortcuts that imply > certain limitations. E.g. intersecting faces do not get split > automatically into subfaces, so intersections of surfaces are jagged. > Also lines are drawn on top of surfaces (so no hidden line removal). > > There are two patches that need to be applied to Sage-4.1.2.rc0 to > make this viewer="canvas3d" option work: > > http://math.chapman.edu/~jipsen/canvas/pre3d/demos/canvas3dmods.patch > and > > http://math.chapman.edu/~jipsen/canvas/pre3d/demos/canvas3d_libmods1.patch > > The changes to files in sage/plot/plot3d are just a couple of lines > and should be easy to review (if this is to be put on some trac > ticket). > > Any feedback is appreciated. I'm interested in a good format for > adding translational and rotational velocities to 3d shapes so that > the .js renderer can do animations. > > -- Peter > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
