- From: Doug Schepers <doug@schepers.cc>
- Date: Wed, 6 Oct 2004 14:40:08 -0400
- To: "'Mark McKay'" <mark@kitfox.com>, <www-svg@w3.org>
Hi, Mark- Part of your track example is easily accomplished in SVG: <circle cx='25' cy='25' r='20' fill='red'> <animateColor id='a1' attributeName='fill' begin='2s; a3.end+2s' dur='5s' from='red' to='yellow' fill='freeze' /> <animateColor id='a2' attributeName='fill' begin='a1.end+2s' dur='5s' from='yellow' to='green' fill='freeze' /> <animateColor id='a3' attributeName='fill' begin='a2.end+2s' dur='5s' from='green' to='red' fill='freeze' /> </circle> As for reusing SMIL, I have a similar proposal here: http://schepers.cc/BAM/#section3 I don't specifically address instance-specific alterations to the timing or colors, but those are things I have thought about, and I suspect they could be incorporated into my general idea. I'd be grateful for any feedback you have for this proposal. I hope you find it interesting. A use case such as yours is pretty much exactly what I had in mind. Regards- -Doug Mark McKay wrote: | | | I'm developing a new SVG viewer and player in Java. | (http://svgsalamander.dev.java.net). The viewer portion is | working, and I'm currently working on animation. Since my | original intention was to produce an SVG viewer/player that | was particularly useful for video games, I'm paying | attention to the animation features. | | Looking over the SVG specification, it seems to me there is | no ability to create clips of animation. The only way I can | think of to create things such as walk cycles, bouncing ball | cycles, buttons with shimmers that slide across them or other | complex repetative animation with SVG are kludges involving | creating events to keep reseting the begining | tim esofanimateelements. | | For example, is there an easy way in SVG to create a circle | that is initially red for 2s, then changes to yellow over 5s, | then pauses for 2s, then fades to green over 5s, then pauses | 2s, then fades back to red? | (Let's call this complete animation a track). Can I then | repeat the track as a unit? Can I stop and start this track | as a unit? Can I define this in the <defs> block and have a | <use> tag create several instances of it in different parts | of the screen? With different time offsets? Perhaps | speeding up or slowing down? | | If SVG doesn't support this notion of tracks, would it make | sense for me to create a special tag for my viewer to support this? | | Mark McKay | -- | http://www.kitfox.com | | |
Received on Wednesday, 6 October 2004 18:40:13 UTC