Is SHAPE_LINE_CHAIN a core element that potentially an ARC might be translated to for display, DRC, or other output needs? If so, it seems that they would be separate with a conversion function from ARC to SHAPE_LINE_CHAIN and there would be SHAPE_ARC_CHAIN or SHAPE_SEGMENT_CHAIN (or similar) that would contain both straight lines and arcs (and other non straight shapes).
Main point: seems like a structure for only straight lines would facilitate the speed other features and analysis. Greg S. > On Jun 30, 2017, at 6:47 AM, hauptmech <[email protected]> wrote: > > > At first glance it looks like SHAPE_LINE_CHAIN and TRACK are the points > where the development clings to straight lines the most. > > One could add a single variable to line segment data structures so that they > could also represent arcs. > > or > > One could add a layer of abstraction so that curves and areas were piecewise > constructs of whatever curve segments get implemented. (arcs, ellipsoids, > spirals, splines, fractals, etc). SHAPE_LINE_CHAIN and TRACK would be lists > of curve segments rather than lists of line vertices as they are now. > > I'd hesitate to start anything without some support for the full picture. > > > >> On 30/06/17 21:11, Tomasz Wlostowski wrote: >>> On 30.06.2017 11:05, hauptmech wrote: >>> I asked earlier this year whether there was any interest in arc tracks >>> and got little response. >>> >>> My use case was importing altium files. >>> >>> Are any of the core developers likely to accept work in this direction? >> Hi, >> >> Sure, it would be awesome if someone could work on it. It's not in the >> plans for the 5.0 release, although some base code for handling arc >> tracks could be already written: geometry functions that we'll need for DRC: >> >> - implement a SHAPE_ARC for the geometry library, describing a non-zero >> thickness arc >> - write an arc to segment collision function (see SHAPE::Collide) >> - write an arc to arc collision function. >> >> Cheers, >> Tom > > > > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : [email protected] > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
