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mathandy / svgpathtools

A collection of tools for manipulating and analyzing SVG Path objects and Bezier curves.
MIT License
558 stars 142 forks source link

BUG: Paths that don't intercept are supposedly intercepting #156

Closed Esser50K closed 3 years ago

Esser50K commented 3 years ago

These two paths should not intercept but do:

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816.6551519335901,438.2870925903291 818.1096444975001,436.10535374446914 818.1096444975001,435.37810746250915 C 818.1096444975001,434.65086118054916 819.3217216340901,432.71153776200913 820.8974219116501,431.01462977078916 C 824.04882246678,427.62081378833915 829.0183387268002,418.65144297758917 829.0183387268002,416.4697041316891 C 829.0183387268002,415.62125013607715 830.2304158633901,413.8031344311891 831.8061161409502,412.46984958094913 C 834.5938935551002,410.0456953077691 839.9270329561002,400.8339090696491 839.9270329561002,398.4097547965491 A 5.89069,5.89069 0.0 0,1 841.7451486609802,395.3795619550791 A 10.4723,10.4723 0.0 0,0 843.5632643658603,389.44038398578914 C 843.5632643658603,387.1374374262691 844.0480952204963,385.07690629406915 844.6541337887903,384.71328315308915 C 846.4722494936703,383.50120601649917 850.8357271853903,374.41062749208913 850.8357271853903,371.5016423642891 A 9.57541,9.57541 0.0 0,1 852.6538428902703,366.53212610427914 C 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C 861.7444214146705,242.17301189008907 861.3807982736935,238.29436505298906 859.9263057097904,236.83987248908906 Q 858.1081900049104,235.02175678420906 858.1081900049104,227.74929396466905 Q 858.1081900049104,220.47683114512904 856.2900743000304,218.65871544024904 A 8.77544,8.77544 0.0 0,1 854.4719585951503,213.32557603925903 A 7.78154,7.78154 0.0 0,0 852.6538428902703,208.23485206558902 C 851.6841811809993,207.38639806997702 850.8357271853903,204.71982836947902 850.8357271853903,202.17446638263903 C 850.8357271853903,199.265481254829 850.2296886170963,197.32615783627904 849.0176114805103,196.84132698164902 C 847.8055343439243,196.356496127019 847.1994957756302,194.53838042212902 847.1994957756302,190.90214901235902 C 847.1994957756302,186.53867132063903 845.1389646434302,181.44794734696902 837.2604632556003,165.69094457125902 C 831.8061161409503,154.782250341959 826.1093535990003,144.722010108259 824.5336533214003,143.38872525805903 C 822.9579530438002,142.05544040785904 821.7458759072503,140.23732470292902 821.7458759072503,139.38887070731903 C 821.7458759072503,136.60109329316901 816.2915287926003,127.63172248241904 811.8068433872203,123.14703707701904 C 809.2614814003803,120.60167509017903 807.2009502681802,117.69268996236903 807.2009502681802,116.72302825309903 C 807.2009502681802,114.29887397991904 761.7480576460803,68.84598135779903 759.4451110865803,68.84598135779903 C 758.4754493773092,68.84598135779903 755.2028411085203,66.42182708461904 752.1726482670502,63.391634243149035 C 749.1424554255802,60.36144140167903 745.7486394431303,57.93728712849904 744.6577700202002,57.93728712849904 C 743.5669005972702,57.93728712849904 741.6275771787302,56.72520999190904 740.1730846148203,55.14950971434904 C 736.5368532050503,51.27086287726904 720.5374350021202,43.39236148944904 716.2951650240202,43.39236148944904 C 714.3558416054802,43.39236148944904 712.5377259005902,42.907530634813035 712.1741027596202,42.30149206651904 C 710.8408179093701,40.24096093431904 701.6290316713201,36.11989866991904 698.2352156888202,36.11989866991904 A 7.44215,7.44215 0.0 0,1 693.2656994288102,34.30178296503904 A 8.33909,8.33909 0.0 0,0 687.8113523141602,32.48366726015904 A 8.33909,8.33909 0.0 0,1 682.3570051995102,30.665551555279038 A 8.33909,8.33909 0.0 0,0 676.9026580848603,28.847435850399037 A 8.33909,8.33909 0.0 0,1 671.4483109702103,27.029320145519037 A 7.78154,7.78154 0.0 0,0 666.3575869965402,25.211204440639037 A 8.77544,8.77544 0.0 0,1 661.0244475955502,23.393088735759036 C 659.8123704589602,22.30221931282904 656.9033853311502,21.574973030879036 653.3883616350403,21.574973030879036 C 649.6309225116103,21.574973030879036 646.9643528111203,20.968934462585036 645.9946911018503,19.756857325999036 C 645.0250293925803,18.544780189413036 642.3584596920804,17.938741621119036 638.7222282823203,17.938741621119036 C 635.0859968725603,17.938741621119036 632.4194271720603,17.211495339166035 631.4497654627903,16.120625916239035 C 630.4801037535203,15.029756493312036 627.8135340530204,14.302510211359035 624.1773026432603,14.302510211359035 C 620.5410712335002,14.302510211359035 617.8745015330003,13.575263929406034 616.9048398237303,12.484394506479035 C 615.9351781144603,11.393525083552035 613.0261929866502,10.666278801599034 607.8142612993103,10.666278801599034 C 602.6023296119703,10.666278801599034 599.8145521978203,10.060240233304034 598.7236827748902,8.848163096719034 C 597.6328133519602,7.636085960134034 594.8450359378102,7.030047391839034 589.6331042504702,7.030047391839034 C 584.4211725631302,7.030047391839034 581.6333951489802,6.424008823544034 580.5425257260501,5.2119316869590335 C 579.3304485894602,3.757439123049034 576.0578403206702,3.3938159820790332 565.9976000869501,3.3938159820790332 C 556.4221907079001,3.3938159820790332 552.5435438708502,2.9089851274430334 551.5738821615502,1.6969079908590332 C 550.6042204522502,0.48483085427503303 541.7560573551801,-3.6096681199637715e-10 503.5756275526502,-3.6096681199637715e-10 C 465.39519775012025,-3.6096681199637715e-10 456.668242367,0.363623140977 455.577372944,1.69690799122

I don't quite understand why this happens. Actually, I found it via the is_contained_by function, which returns false because they supposedly intersect. But in reality, the first path is contained by the second path.

Esser50K commented 3 years ago

Uploading full SVG for reference (it's a zip because apparently github doesn't support SVGs?) image-fileAsset 4.svg.zip ce

mathandy commented 3 years ago

Looks like Arc.intersect(other_curve) was sometimes returning t-values outside [0, 1] when other_curve was a bezier segment. This is fixed now. Thanks for your help!

Esser50K commented 3 years ago

so I just need to install a more recent version? should I do it directly from the repo?

mathandy commented 3 years ago

@Esser50K PyPI is now updated.