I have already done what you describe in a HTML5 standalone for displaying progress along a Bezier curve, using LC Script only. http://hh.on-rev.com/html5/hhProgressHTML5_2-8.0.2X.html
And it is done for all LC's SVG icons using the jquery-drawsvg plugin in a browser widget (incl. optional affine transformations of the SVG icons). http://livecodeshare.runrev.com/stack/833/AutoDraw_SVGicon What I meant is to have such a tricky translation of model elements (arc, curve etc.) of an SVG path into an appropriate points-only path in LCB? Perhaps one could use parts of LC-Ian's SVG work for that? > Mark wrote: > Heh - sometimes it takes a relative tome of justification to arrive at a > simple explanation! > > However the beauty of Bézier curves is that arcs are just a small subset > of what they can represent 'well enough'. > > For moving along an arbitrary (Bézier - you can represent a straight line > segment as one trivially) path, what you actually need is first the length > of the path (annoyingly not a representable function - iirc) and a parametric > form of a Bézier curve (which is how they are best expressed). > > Then to step along the path at fixed distance at each step you use > f(n * fixeddist / length) (here f is the parametric form of the Bézier > - returning a 2d point). You'd need some adjustment (+/- 1 pix) to account > for rounding error - but I think the idea is sound. _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
