It is a pretty crude version but you are welcome to it. I got the idea from "Making Mechanical Marvels In Wood" : http://www.amazon.com/Making-Mechanical-Marvels-Wood-Raymond/dp/0806973587\ so add that reference too.
I like the Reuleaux triangle. Some made a drill bit that rotates off centered using it so it actually drills a square hole except the small corners. I may try a hand at it. Bruce --- In svg-developers@yahoogroups.com, "ddailey" <ddai...@...> wrote: > > Cool, Bruce! It almost seems paradoxical in the way it moves, reminding me a > bit of those wooden winding toys. > > Seems like we'll need a machinery collection somewhere now. Would you mind if > I stuck this example (with credit, of course) on a page somewhere? It would > be fun to build little components and then let people hook them together > sorta like the motors in Phun (http://www.phunland.com/wiki/Home ) > > BTW the animation of the top thing could save the poor browser a bit of work > using > <animateTransform attributeName="transform" attributeType="XML" > type="rotate" from="0" to="60" > begin="0s" dur="4s" repeatCount="indefinite" /> > because of the sixfold symmetry. It seems like the browser might be happier > having to only manage 4 seconds of animation (and then having that delightful > instant of taking a breath) instead of 24 before starting over. > > The Reuleaux triangle (http://en.wikipedia.org/wiki/Reuleaux_triangle ) would > be another instance. (Someone really should start lacing Wikipedia with SVG > animation since the particular animation there is thoroughly icky. Starting > with the entry on SVG would be a good start.) It is a good example of why > re-inventing the wheel is sometimes a good planetary exercise: sometimes > people get too stubborn. > > cheers > David > > > ----- Original Message ----- > From: bruce > To: svg-developers@yahoogroups.com > Sent: Wednesday, October 13, 2010 3:08 PM > Subject: [svg-developers] Re: fun but buggy -- gears > > > > David > These are interesting examples. I will add another: > <?xml version="1.0" standalone="no"?> > <svg width="100%" height="100%" viewBox="-100 -150 200 300" > xmlns="http://www.w3.org/2000/svg";> > <g> > <animateTransform attributeName="transform" attributeType="XML" > type="rotate" from="0" to="360" > begin="0s" dur="24s" repeatCount="indefinite" /> > <circle cx="0" cy="0" r="100" fill="blue" /> > <rect x="-10" y="-100" width="20" height="200" fill="gray" /> > <rect x="-10" y="-100" width="20" height="200" fill="gray" > transform="rotate(60)"/> > <rect x="-10" y="-100" width="20" height="200" fill="gray" > transform="rotate(120)"/> > </g> > <g transform="translate(0,45)"> > <g> > <animateTransform attributeName="transform" attributeType="XML" > type="rotate" from="0" to="360" > begin="0s" dur="12s" repeatCount="indefinite" /> > <circle cx="0" cy="45" r="10" fill="red" /> > <circle cx="0" cy="45" r="10" fill="red" transform="rotate(120)"/> > <circle cx="0" cy="45" r="10" fill="red" transform="rotate(240)"/> > <line x1="0" y1="0" x2="0" y2="45" stroke-width="6" stroke="black" > stroke-linecap="round" /> > <line x1="0" y1="0" x2="0" y2="45" stroke-width="6" stroke="black" > stroke-linecap="round" transform="rotate(120)"/> > <line x1="0" y1="0" x2="0" y2="45" stroke-width="6" stroke="black" > stroke-linecap="round" transform="rotate(240)"/> > </g> > </g> > </svg> > > This is a quick and dirty version of a roller gear. To see a physical > picture of one see: > http://lumberjocks.com/projects/23791 > All browsers work fine except IE. I haven't tested it with ASV. > Enjoy! > > --- In svg-developers@yahoogroups.com, "ddailey" <ddailey@> wrote: > > > > Here are a couple of interesting examples / difficult browser > calisthenics: > > http://granite.sru.edu/~ddailey/svg/animoval3.svg > > and > > http://granite.sru.edu/~ddailey/svg/animoval4.svg > > > > The first works much as I think it should in Opera, Chrome and IE/ASV. > FF4 runs only one of the gears. Safari screws up the stroke's gradient. > IE/ASV, though and Opera/Chrome/Safari don't agree about the proper values > for animating dashoffset.In IE/ASV, using values="0;24" and values="24;0" > respectively for the two animations seems to line up the gear teeth well, > whereas for the others I had to do values="12;36" and values="24;0" to keep > the teeth from colliding. > > > > The second example seems to work well only in IE/ASV and Chrome -- a > first for those two to team up in bettering Opera in my experience! ASV and > both webkit browsers seem to get the outergear to spin. FF seems to see that > there is something there, but stalls before it can make a go of it, and Opera > for some odd reason seems to ignore that particular animation. > > > > Btw, I rather liked the slighty readjustment that ASV and webkit > experience due to the circumference of the ellipse being irrational -- > something like it might be expected, I think, in a physical model. > > > > At first I was annoyed that I couldn't get the gradient to extend out > into the teeth, but then I remembered the r attribute of a radial gradient > (.5 by default). I could have varied it but decided not to. > > > > It would be fun to make more complex machines sorta like this based on > SMIL, but we'd have to figure out which browers are doing it right first I > suppose. > > > > Do let me know if it is my code of the browsers that are goofy here. > > > > cheers > > David > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > [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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