Hey yeah thanks I had found my way there too. The code flow was a bit strange, where it tries to fit a curve once, then if it can't adds a line and tried again. I didn't really understand it completely, but its definitely the best starting point I've found so far.... On Mar 15, 2012 11:48 PM, "Dan Falck" <dfa...@frontier.com> wrote: > > I had a look on my desktop machine: > > look in the HeeksCAD project at HSpline::ToBiarcs in HSpline.cpp > > http://code.google.com/p/heekscad/source/browse/trunk/src/HSpline.cpp > > look around line 571 > > Let us know what you come up with. I am interested in this one too, for CNC code generation. > > Dan > > > On 03/15/2012 06:40 PM, Dave Cowden wrote: >> >> Thanks for the tip, I will look! >> >> On Mar 15, 2012 6:40 PM, "Dan Falck" <dfa...@frontier.com> wrote: >>> >>> Dave, >>> You might look in some the C++ code in the HeeksCNC project for inspiration. Dan Heeks did a pretty good job with spline to arc conversion with OpenCascade. >>> Dan Falck >>> >>> Sent from my HTC smartphone on the Now Network from Sprint! >>> >>> >>> ----- Reply message ----- >>> From: "Dave Cowden" <dave.cow...@gmail.com> >>> To: "pythonOCC users mailing list." <pythonocc-users@gna.org> >>> Subject: [Pythonocc-users] Decompose BSpline to arcs and lines? >>> Date: Thu, Mar 15, 2012 3:17 pm >>> >>> >>> Thanks for the pointer, Thomas! >>> >>> >>> On Thu, Mar 15, 2012 at 10:00 AM, Thomas Paviot <tpav...@gmail.com> wrote: >>>> >>>> 2012/3/14 Dave Cowden <dave.cow...@gmail.com> >>>>> >>>>> Hi, all ( especially Jelle ): >>>>> >>>>> I'm trying to solve a problem i just know someone else has solved: converting a bspline into arcs and lines. ( Actually in my case i have a list of points, through which I am interpolating a bspline-- so i could skip that step actually. ) >>>>> >>>>> Anyway, I came across this OCC thread, which yielded several ideas but its not clear there was a solution: >>>>> >>>>> http://www.opencascade.org/org/forum/thread_20706/ >>>>> >>>>> I tried to fetch the URL Jelle Posted for hb-robotics-code on google, but the link is dead. >>>>> >>>>> >>>>> Does anyone know if there s any pythonOCC code I can grab that will make solving this problem easier? If not, I certainly think its worth adding to pythonOCC. >>>>> >>>>> Since my problem doesnt care about the intermediate bspline ( I have a list of points ), then I may instead use something along the lines of one of these algorithms: >>>>> >>>>> http://miarn.sourceforge.net/pdf/a1738b.pdf >>>>> http://www.bmva.org/bmvc/1988/avc-88-040.pdf >>>>> >>>>> which seems very fast. It is for arc detection, but of course what's left is just lines. >>>>> >>>>> Has anyone else had experience with this problem? >>>>> thanks a lot! >>>>> Dave >>>>> >>>> >>>> Hi Dave, >>>> >>>> I'm not aware of any work related to BSpline to arc/lines decomposition using pythonOCC. Maybe this reference http://www.sciencedirect.com/science/article/pii/S0010448599000196 could also help. >>>> >>>> Regards, >>>> >>>> Thomas >>>> >>>> >>>> _______________________________________________ >>>> Pythonocc-users mailing list >>>> Pythonocc-users@gna.org >>>> https://mail.gna.org/listinfo/pythonocc-users >>>> >>> >>> >>> _______________________________________________ >>> Pythonocc-users mailing list >>> Pythonocc-users@gna.org >>> https://mail.gna.org/listinfo/pythonocc-users >>> >> >> >> _______________________________________________ >> Pythonocc-users mailing list >> Pythonocc-users@gna.org >> https://mail.gna.org/listinfo/pythonocc-users > > > > _______________________________________________ > Pythonocc-users mailing list > Pythonocc-users@gna.org > https://mail.gna.org/listinfo/pythonocc-users >
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