Thanks Bruce, I'm sure you will also love to hear that it was inspired by your carousel code :)
http://tech.groups.yahoo.com/group/svg-developers/message/63747 You use display, I use opacity, rest is just synchronizing keyTimes. As for 2 cars, I think what you need is two more bridges and a tighter synchronization: http://owl3d.com/tests/svg-developers/notknot2.svg Yet, it doesn't fill like a comprehensive solution for multi speeds... Regards Israel --- In svg-developers@yahoogroups.com, "bruce" <bruce.rind...@...> wrote: > > Love it! > But what if there are two cars and they cross under and over a bridge at the > same time? You will need an extra "car" to make sure it is over the top of > the bridge. > Bruce > > --- In svg-developers@yahoogroups.com, "israel_eisenberg" <owlgems@> wrote: > > > > Hi David, here is my suggestion: > > > > http://owl3d.com/tests/svg-developers/notknot.svg > > > > For smooth movement of the car, mpath is a copy of the highway, > > same d attribute without the internal M jumps. > > > > 2 clipped copies of the highway are used as bridges > > and their opacity is synchronized with the car travel. > > > > Do I get an extra credit for this? :) > > > > BTW, the Celtic knot is a Tubefy demo in the normalGradient article: > > > > http://owl3d.com/svg/tubefy/articles/article3.html#poi > > > > Warmest regards, > > > > Israel > > > > > > --- In svg-developers@yahoogroups.com, "ddailey" <ddailey@> wrote: > > > > > > In this example: http://srufaculty.sru.edu/david.dailey/svg/notknot2.svg > > > I see the following results: > > > IE/ASV and FF4 agree with me about the timing... > > > Opera seems to synchronize the declarative animation differently between > > > the application of the mask and the vehicles... > > > Safari and Chrome do not seem to activate the animation of the mask. > > > > > > Background story can be seen here: > > > http://srufaculty.sru.edu/david.dailey/svg/knots.html, it leads into the > > > above experiment and to some of the following concerns: > > > Let's limit our consideration to the FF4 and IE+ASV version (since they > > > did what I intended -- not that that is right of course -- I think one > > > could simply change the timing and make it work in Opera instead) > > > > > > 1. I was pleased to be able to simulate a knot using a single path, since > > > the semantics makes sense. My previous forays into the subject (at above > > > link) had various problems associated with both semantics and the size of > > > the DOM. I was also pleased with how a couple of simple re-uses of that > > > path (like some of the vector effects techniques I suppose) suffice to > > > simulate a fill and a texture to the road. > > > > > > 2. The blue car goes under the underpass and over the overpass as it > > > should, though the red car doesn't. This is due to a trick: I gave the > > > bridge magical properties and put the car under its spell. Specifically, > > > the car has a mask applied (as a sort of inverse clipPath -- Doug > > > Schepers says he's opened a WG issue on the issue of inverse clipPaths) > > > based on a "subpath"* of the road and the mask animates between white and > > > black in a way planned to synchronize with the car's approach to the > > > bridge. The bridge doesn't know that the car is approaching**, it is just > > > synchronized through a common time interval on the SMIL loop. The red > > > car is under the same influence of the mask, but the mask has not been > > > programmed for the red car's arrival. > > > > > > 3. Can anyone think of an easier way to do this? What if the cars are all > > > moving at different speeds that have perhaps been randomized? > > > > > > 4. One could build the road as a series of segments and then have the car > > > leap from segment to segment, and change its stacking order within the > > > DOM as it goes -- but that would be rather script heavy, semantically > > > inaccessible and distinctly inelegant. > > > > > > 5. Is Opera or FF and ASV right on the timing? I hope for the latter > > > simply since I don't want to have to rethink my bridges. > > > > > > cheers > > > David > > > > > > * One can think of subpaths as unioned into a "superpath". Vector effects > > > in SVG 1.2 covers a part of this. > > > ** Though it might be nice to be able to determine that without have to > > > calculate it through script or paper and pencil but to expose the > > > animated values. > > > > > > [Non-text portions of this message have been removed] > > > > > > ------------------------------------ ----- To unsubscribe send a message to: svg-developers-unsubscr...@yahoogroups.com -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! 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