#linuxcnc-devel | Logs for 2015-02-15

[11:46:19] <tjtr33> dgarr what diff program are you using? mine has no --git option, and my output is not same format. so, i hand edit the patch.
[11:54:29] <tjtr33> oh its a git command. nm
[11:57:56] <tjtr33> hah! git diff orig.c edited.c cool
[18:27:59] <andypugh> G5 in G18. It’s a fair question, why isn’t it possible? http://www.linuxcnc.org/index.php/english/forum/20-g-code/28875-g5-in-lathe-mode#55996
[18:52:50] <cradek> no particular reason that I can imagine; it's just not implemented
[18:53:03] <cradek> same for arcs in 17.1 18.1 19.1
[18:53:18] <cradek> ideally you would be able to do all the things in all the planes
[18:55:07] <andypugh> The code seems rather explicitly XY, but the input and output could presumably be re-mapped on input and output to the code.
[18:56:06] <cradek> there's precedent in the interp for plane-agnosticism, like canned cycles (and cutter comp I think?) have
[18:56:15] <andypugh> I am currently trying to get my head around splines and beziers, and in the process I found a bug in Inkscape (after a couple of days assuming the problem was in my SVG generation code)
[18:56:17] <cradek> you write as if it's XY and there's a cheesy translation layer
[18:56:36] <cradek> argh, that sucks
[18:56:47] <cradek> you sure might find related bugs in linuxcnc
[18:57:10] <cradek> I know at least some of the error checking is poor, but I hope the motion is right for correct cases
[18:57:30] <andypugh> Ah, this was a stranger one. and the Linux version is fine: https://bugs.launchpad.net/inkscape/+bug/1421865
[18:58:03] <cradek> for instance, http://sourceforge.net/p/emc/bugs/379/
[18:59:00] <andypugh> That does seem unlikely to be the expected path :-)
[18:59:32] <cradek> well it's as reasonable an expectation as any, haha (the input is an error)
[19:00:10] <andypugh> I confess I don’t actually see the use-case for splines in mill or lathe code
[19:00:29] <andypugh> Especially as making a parallel path to any given spline is hard.
[19:00:33] <cradek> yeah, you're not wrong
[19:01:01] <cradek> if your code comes from a 3d model that's built that way I suppose it's nice, but it's sure true it's hard to do cutter comp
[19:01:22] <andypugh> If you want a curve then do that in the CAD-CAM, I say.
[19:01:22] <cradek> I like that it lets you directly draw truetype and type1 fonts
[19:01:36] <andypugh> Ah, look, a use-case :-)
[19:01:39] <cradek> haha
[19:01:57] <cradek> I bet truetype-tracer is the only "common" thing that uses these
[19:02:04] <andypugh> Anyway, time to sleep hee.
[19:02:08] <andypugh> (here)
[19:02:10] <cradek> g'night