On Tue, May 8, 2012 at 7:57 AM, Tavmjong Bah <tavmjong@...8...> wrote:
We just discussed this at the SVG Working Face-to-face meeting (I called in). There is support for adding the extrapolated version to the spec. Two small hiccups... one, a couple people asked for the exact mathematical formula to use to find the curvature of the last point (could you supply this?), and two, current rendering libraries that browsers use don't support this so it would have to be added (or simulated via a fill). A miter limit would have to be included to prevent the join from getting too long.
Johan would be the one who knows the math behind it. Hopefully he will chime in with it when he gets back from his business trip next week (he didn't expect to be online/available during it).
Related to support, in Inkscape it's currently simulated by a fill (since the lpe is an actual filled object).
The LPE does have a miter feature, but the interpolation method currently gets limited more quickly by the number of segments it uses for the calculation (I would like to see that number bumped up just a little, and leave it to miter to limit).
Cheers, Josh