The obvious question is, does it return the same thing under previous releases? ________________________________________ From: Curtis Jensen [curtis.jen...@gmail.com] Sent: 11 October 2012 21:52 To: user@commons.apache.org Subject: [math]
Using the latest Apache math from the Subversion repository, I'm finding a case where polygon difference is returning incorrect results. Below is a test case of subtracting two polygons (Sorry, this is the simplest case that I could find that duplicates the problem). Attached are charts of the inputs, the results and inputs and results all together. There are three problems with the result. The first is that the first point of the first set of vertices is null (and the first point of the second set is also null). The second is that, even if the first null points are ignored, the returned polygon is not the correct result. The first and last points are way off, and the remaining points do not match the original polygon boundaries. Additionally, there are two holes that are returned in the results. This subtraction case should not have holes. Can someone verify that this is either a bug, or something I am doing incorrectly in my test case? Thanks, Curtis public void testComplexDifference() { Vector2D[][] vertices1 = new Vector2D[][] { new Vector2D[] { new Vector2D( 90.08714908223715, 38.370299337260235), new Vector2D( 90.08709517675004, 38.3702895991413), new Vector2D( 90.08401538704919, 38.368849330127944), new Vector2D( 90.08258210430711, 38.367634558585564), new Vector2D( 90.08251455106665, 38.36763409247078), new Vector2D( 90.08106599752608, 38.36761621664249), new Vector2D( 90.08249585300035, 38.36753627557965), new Vector2D( 90.09075743352184, 38.35914647644972), new Vector2D( 90.09099945896571, 38.35896264724079), new Vector2D( 90.09269383800086, 38.34595756121246), new Vector2D( 90.09638631543191, 38.3457988093121), new Vector2D( 90.09666417351019, 38.34523360999418), new Vector2D( 90.1297082145872, 38.337670454923625), new Vector2D( 90.12971687748956, 38.337669827794684), new Vector2D( 90.1240820219179, 38.34328502001131), new Vector2D( 90.13084259656404, 38.34017811765017), new Vector2D( 90.13378567942857, 38.33860579180606), new Vector2D( 90.13519557833206, 38.33621054663689), new Vector2D( 90.13545616732307, 38.33614965452864), new Vector2D( 90.13553111202748, 38.33613962818305), new Vector2D( 90.1356903436448, 38.33610227127048), new Vector2D( 90.13576283227428, 38.33609255422783), new Vector2D( 90.13595870833188, 38.33604606376991), new Vector2D( 90.1361556630693, 38.3360024198866), new Vector2D( 90.13622408795709, 38.335987048115726), new Vector2D( 90.13696189099994, 38.33581914328681), new Vector2D( 90.13746655304897, 38.33616706665265), new Vector2D( 90.13845973716064, 38.33650776167099), new Vector2D( 90.13950901827667, 38.3368469456463), new Vector2D( 90.14393814424852, 38.337591835857495), new Vector2D( 90.14483839716831, 38.337076122362475), new Vector2D( 90.14565474433601, 38.33769000964429), new Vector2D( 90.14569421179482, 38.3377117256905), new Vector2D( 90.14577067124333, 38.33770883625908), new Vector2D( 90.14600350631684, 38.337714326520995), new Vector2D( 90.14600355139731, 38.33771435193319), new Vector2D( 90.14600369112401, 38.33771443882085), new Vector2D( 90.14600382486884, 38.33771453466096), new Vector2D( 90.14600395205912, 38.33771463904344), new Vector2D( 90.14600407214999, 38.337714751520764), new Vector2D( 90.14600418462749, 38.337714871611695), new Vector2D( 90.14600422249327, 38.337714915811034), new Vector2D( 90.14867838361471, 38.34113888210675), new Vector2D( 90.14923750157374, 38.341582537502575), new Vector2D( 90.14877083250991, 38.34160685841391), new Vector2D( 90.14816667319519, 38.34244232585684), new Vector2D( 90.14797696744586, 38.34248455284745), new Vector2D( 90.14484318014337, 38.34385573215269), new Vector2D( 90.14477919958296, 38.3453797747614), new Vector2D( 90.14202393306448, 38.34464324839456), new Vector2D( 90.14198920640195, 38.344651155237216), new Vector2D( 90.14155207025175, 38.34486424263724), new Vector2D( 90.1415196143314, 38.344871730519), new Vector2D( 90.14128611910814, 38.34500196593859), new Vector2D( 90.14047850603913, 38.34600084496253), new Vector2D( 90.14045907000337, 38.34601860032171), new Vector2D( 90.14039496493928, 38.346223030432384), new Vector2D( 90.14037626063737, 38.346240203360026), new Vector2D( 90.14030005823724, 38.34646920000705), new Vector2D( 90.13799164754806, 38.34903093011013), new Vector2D( 90.11045289492762, 38.36801537312368), new Vector2D( 90.10871471476526, 38.36878044144294), new Vector2D( 90.10424901707671, 38.374300101757), new Vector2D( 90.10263482039932, 38.37310041316073), new Vector2D( 90.09834601753448, 38.373615053823414), new Vector2D( 90.0979455456843, 38.373578376172475), new Vector2D( 90.09086514328669, 38.37527884194668), new Vector2D( 90.09084931407364, 38.37590801712463), new Vector2D( 90.09081227075944, 38.37526295920463), new Vector2D( 90.09081378927135, 38.375193883266434) } }; PolygonsSet set1 = buildSet(vertices1); Vector2D[][] vertices2 = new Vector2D[][] { new Vector2D[] { new Vector2D( 90.13067558880044, 38.36977255037573), new Vector2D( 90.12907570488, 38.36817308242706), new Vector2D( 90.1342774136516, 38.356886880294724), new Vector2D( 90.13090330629757, 38.34664392676211), new Vector2D( 90.13078571364593, 38.344904617518466), new Vector2D( 90.1315602208914, 38.3447185040846), new Vector2D( 90.1316336226821, 38.34470643148342), new Vector2D( 90.134020944832, 38.340936644972885), new Vector2D( 90.13912536387306, 38.335497255122334), new Vector2D( 90.1396178806582, 38.334878075552126), new Vector2D( 90.14083049696671, 38.33316530644106), new Vector2D( 90.14145252901329, 38.33152722916191), new Vector2D( 90.1404779335565, 38.32863516047786), new Vector2D( 90.14282712131586, 38.327504432532066), new Vector2D( 90.14616669875488, 38.3237354115015), new Vector2D( 90.14860976050608, 38.315714862457924), new Vector2D( 90.14999277782437, 38.3164932507504), new Vector2D( 90.15005207194997, 38.316534677663356), new Vector2D( 90.15508513859612, 38.31878731691609), new Vector2D( 90.15919938519221, 38.31852743183782), new Vector2D( 90.16093758658837, 38.31880662005153), new Vector2D( 90.16099420184912, 38.318825953291594), new Vector2D( 90.1665411125756, 38.31859497874757), new Vector2D( 90.16999653861313, 38.32505772048029), new Vector2D( 90.17475243391698, 38.32594398441148), new Vector2D( 90.17940844844992, 38.327427213761325), new Vector2D( 90.20951909541378, 38.330616833491774), new Vector2D( 90.2155400467941, 38.331746223670336), new Vector2D( 90.21559881391778, 38.33175551425302), new Vector2D( 90.21916646426041, 38.332584299620805), new Vector2D( 90.23863749852285, 38.34778978875795), new Vector2D( 90.25459855175802, 38.357790570608984), new Vector2D( 90.25964298227257, 38.356918010203174), new Vector2D( 90.26024593994703, 38.361692743151366), new Vector2D( 90.26146187570015, 38.36311080550837), new Vector2D( 90.26614159359622, 38.36510808579902), new Vector2D( 90.26621342936448, 38.36507942500333), new Vector2D( 90.26652190211962, 38.36494042196722), new Vector2D( 90.26621240678867, 38.365113172030874), new Vector2D( 90.26614057102057, 38.365141832826794), new Vector2D( 90.26380080055299, 38.3660381760273), new Vector2D( 90.26315345241, 38.36670658276421), new Vector2D( 90.26251574942881, 38.367490323488084), new Vector2D( 90.26247873448426, 38.36755266444749), new Vector2D( 90.26234628016698, 38.36787989125406), new Vector2D( 90.26214559424784, 38.36945909356126), new Vector2D( 90.25861728442555, 38.37200753430875), new Vector2D( 90.23905557537864, 38.375405314295904), new Vector2D( 90.22517251874075, 38.38984691662256), new Vector2D( 90.22549955153215, 38.3911564273979), new Vector2D( 90.22434386063355, 38.391476432092134), new Vector2D( 90.22147729457276, 38.39134652252034), new Vector2D( 90.22142070120117, 38.391349167741964), new Vector2D( 90.20665060751588, 38.39475580900313), new Vector2D( 90.20042268367109, 38.39842558622888), new Vector2D( 90.17423771242085, 38.402727751805344), new Vector2D( 90.16756796257476, 38.40913898597597), new Vector2D( 90.16728283954308, 38.411255399912875), new Vector2D( 90.16703538220418, 38.41136059866693), new Vector2D( 90.16725865657685, 38.41013618805954), new Vector2D( 90.16746107640665, 38.40902614307544), new Vector2D( 90.16122795307462, 38.39773101873203) } }; PolygonsSet set2 = buildSet(vertices2); PolygonsSet set = (PolygonsSet) new RegionFactory<Euclidean2D>().difference(set1.copySelf(), set2.copySelf()); Vector2D[][] verticies = set.getVertices(); Assert.assertTrue(verticies[0][0] != null); Assert.assertEquals(1, verticies.length); } -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. 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