Thanks for your answer Klaas. I am using kbool (not wxArt2D) in python scripts: http://code.google.com/p/pykbool So that I indeed will disable the creation of those key files.
About your questions: I have a script that uses kbool to transform a big multi-polygon into a single polygonal chain and displays the result using tk. The big multipolygon is made of one contour, 37 holes, all closed & counter-clockwise, > 5000 points. Bounding box: (0, 0), (800, 502) The coordinates are here (11KB): http://pykbool.googlecode.com/svn/trunk/poly.json.gz The contour and holes look like: http://pykbool.googlecode.com/svn/wiki/keyhole3.png My goal is to connect those37 holes to the contour using as few engines and operations as possible: I first tried to only use one single A_SUB_B operation. GROUP_A containing the contour points, and GROUP_B containing all the holes points in a row. The result was indeed a single polygonal chain, but I missed a lot of vertices: http://pykbool.googlecode.com/svn/wiki/keyhole2_pb1.png I then tried to substract each hole one after the other: C1=engine.A_SUB_B(contour, hole1), C2=engine.A_SUB_B(C1, hole2), ... But while calculating C13=engine.A_SUB_B(C12, hole13), I always get a "no next (endpoint != beginpoint)" exception (graph.cpp, line 421). So that I catch that exception and continue the substractions using a new engine: C13=new_engine.A_SUB_B(C12, hole13), ... , C=new_engine.A_SUB_B(C36, hole37) The result: http://pykbool.googlecode.com/svn/wiki/keyhole2.png Now, I am still under the impression that my usage of kbool is sub-optimal. Could'nt I better configure it to do the whole substration using only one operation and/or one engine ? The engines I use have the default parameters (me lazy): marge=0.001, dgrid=1000, correction_factor=500.0, correction_aber=1.0, round_factor=1.5, smooth_aber=10.0, maxline_merge=1000.0, grid = 10000 Cheers, Emmanuel From: klaas.holwerda <ngi@kl...> - 2011-02-22 00:31 >On 02/20/2011 04:37 PM, Emmanuel Decitre wrote: >> Hi there, >> >> What is the usage of the files graphkeyfile.key and keyfile.key ? >> I could only find snippets writing them, but none reading them. >> >> Are WriteKEY and WriteGraphKEY only for debug purposes ? >Right, only for that you should disbale it normally. >KEY files can be red in by several wxArt2D tools, and makes it easier to debug. > >Your problems with kbool can be many. What coordinates and what scaling? >I mean the range of the numbers. > >kbool delivers all holes at once (when set right), so it is not clear what you are doing?? > >Regards, > >klaas
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