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skia2/tests/PathOpsCubicIntersectionTest.cpp
caryclark 54359294a7 cumulative pathops patch 
Replace the implicit curve intersection with a geometric curve intersection. The implicit intersection proved mathematically unstable and took a long time to zero in on an answer.

Use pointers instead of indices to refer to parts of curves. Indices required awkward renumbering.

Unify t and point values so that small intervals can be eliminated in one pass.

Break cubics up front to eliminate loops and cusps.

Make the Simplify and Op code more regular and eliminate arbitrary differences.

Add a builder that takes an array of paths and operators.

Delete unused code.

BUG=skia:3588
R=reed@google.com

Review URL: https://codereview.chromium.org/1037573004
2015-03-26 07:52:43 -07:00

683 lines
26 KiB
C++
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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "PathOpsCubicIntersectionTestData.h"
#include "PathOpsTestCommon.h"
#include "SkGeometry.h"
#include "SkIntersections.h"
#include "SkPathOpsRect.h"
#include "SkReduceOrder.h"
#include "Test.h"
const int firstCubicIntersectionTest = 9;
static void standardTestCases(skiatest::Reporter* reporter) {
for (size_t index = firstCubicIntersectionTest; index < tests_count; ++index) {
int iIndex = static_cast<int>(index);
const SkDCubic& cubic1 = tests[index][0];
const SkDCubic& cubic2 = tests[index][1];
SkReduceOrder reduce1, reduce2;
int order1 = reduce1.reduce(cubic1, SkReduceOrder::kNo_Quadratics);
int order2 = reduce2.reduce(cubic2, SkReduceOrder::kNo_Quadratics);
const bool showSkipped = false;
if (order1 < 4) {
if (showSkipped) {
SkDebugf("%s [%d] cubic1 order=%d\n", __FUNCTION__, iIndex, order1);
}
continue;
}
if (order2 < 4) {
if (showSkipped) {
SkDebugf("%s [%d] cubic2 order=%d\n", __FUNCTION__, iIndex, order2);
}
continue;
}
SkIntersections tIntersections;
tIntersections.intersect(cubic1, cubic2);
if (!tIntersections.used()) {
if (showSkipped) {
SkDebugf("%s [%d] no intersection\n", __FUNCTION__, iIndex);
}
continue;
}
if (tIntersections.isCoincident(0)) {
if (showSkipped) {
SkDebugf("%s [%d] coincident\n", __FUNCTION__, iIndex);
}
continue;
}
for (int pt = 0; pt < tIntersections.used(); ++pt) {
double tt1 = tIntersections[0][pt];
SkDPoint xy1 = cubic1.ptAtT(tt1);
double tt2 = tIntersections[1][pt];
SkDPoint xy2 = cubic2.ptAtT(tt2);
if (!xy1.approximatelyEqual(xy2)) {
SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
__FUNCTION__, (int)index, pt, tt1, xy1.fX, xy1.fY, tt2, xy2.fX, xy2.fY);
}
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
}
reporter->bumpTestCount();
}
}
static const SkDCubic testSet[] = {
// FIXME: uncommenting these two will cause this to fail
// this results in two curves very nearly but not exactly coincident
#if 0
{{{67.426548091427676, 37.993772624988935}, {23.483695892376684, 90.476863174921306},
{35.597065061143162, 79.872482633158796}, {75.38634169631932, 18.244890038969412}}},
{{{67.4265481, 37.9937726}, {23.4836959, 90.4768632}, {35.5970651, 79.8724826},
{75.3863417, 18.24489}}},
#endif
{{{0, 0}, {0, 1}, {1, 1}, {1, 0}}},
{{{1, 0}, {0, 0}, {0, 1}, {1, 1}}},
{{{0, 1}, {4, 5}, {1, 0}, {5, 3}}},
{{{0, 1}, {3, 5}, {1, 0}, {5, 4}}},
{{{0, 1}, {1, 6}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {1, 0}, {6, 1}}},
{{{0, 1}, {3, 4}, {1, 0}, {5, 1}}},
{{{0, 1}, {1, 5}, {1, 0}, {4, 3}}},
{{{0, 1}, {1, 2}, {1, 0}, {6, 1}}},
{{{0, 1}, {1, 6}, {1, 0}, {2, 1}}},
{{{0, 1}, {0, 5}, {1, 0}, {4, 0}}},
{{{0, 1}, {0, 4}, {1, 0}, {5, 0}}},
{{{0, 1}, {3, 4}, {1, 0}, {3, 0}}},
{{{0, 1}, {0, 3}, {1, 0}, {4, 3}}},
{{{0, 0}, {1, 2}, {3, 4}, {4, 4}}},
{{{0, 0}, {1, 2}, {3, 4}, {4, 4}}},
{{{4, 4}, {3, 4}, {1, 2}, {0, 0}}},
{{{0, 1}, {2, 3}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {1, 0}, {3, 2}}},
{{{0, 2}, {0, 1}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {2, 0}, {1, 0}}},
{{{0, 1}, {0, 2}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {1, 0}, {2, 0}}},
{{{0, 1}, {1, 6}, {1, 0}, {2, 0}}},
{{{0, 1}, {0, 2}, {1, 0}, {6, 1}}},
{{{0, 1}, {5, 6}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {1, 0}, {6, 5}}},
{{{95.837747722788592, 45.025976907939643}, {16.564570095652982, 0.72959763963222402},
{63.209855865319199, 68.047528419665767}, {57.640240647662544, 59.524565264361243}}},
{{{51.593891741518817, 38.53849970667553}, {62.34752929878772, 74.924924725166022},
{74.810149322641152, 34.17966562983564}, {29.368398119401373, 94.66719277886078}}},
{{{39.765160968417838, 33.060396198677083}, {5.1922921581157908, 66.854301452103215},
{31.619281802149157, 25.269248720849514}, {81.541621071073038, 70.025341524754353}}},
{{{46.078911165743556, 48.259962651999651}, {20.24450549867214, 49.403916182650214},
{0.26325131778756683, 24.46489805563581}, {15.915006546264051, 83.515023059917155}}},
{{{65.454505973241524, 93.881892270353575}, {45.867360264932437, 92.723972719499827},
{2.1464054482739447, 74.636369140183717}, {33.774068594804994, 40.770872887582925}}},
{{{72.963387832494163, 95.659300729473728}, {11.809496633619768, 82.209921247423594},
{13.456139067865974, 57.329313623406605}, {36.060621606214262, 70.867335643091849}}},
{{{32.484981432782945, 75.082940782924624}, {42.467313093350882, 48.131159948246157},
{3.5963115764764657, 43.208665839959245}, {79.442476890721579, 89.709102357602262}}},
{{{18.98573861410177, 93.308887208490106}, {40.405250173250792, 91.039661826118675},
{8.0467721950480584, 42.100282172719147}, {40.883324221187891, 26.030185504830527}}},
{{{7.5374809128872498, 82.441702896003477}, {22.444346930107265, 22.138854312775123},
{66.76091829629658, 50.753805856571446}, {78.193478508942519, 97.7932997968948}}},
{{{97.700573130371311, 53.53260215070685}, {87.72443481149358, 84.575876772671876},
{19.215031396232092, 47.032676472809484}, {11.989686410869325, 10.659507480757082}}},
{{{26.192053931854691, 9.8504326817814416}, {10.174241480498686, 98.476562741434464},
{21.177712558385782, 33.814968789841501}, {75.329030899018534, 55.02231980442177}}},
{{{56.222082700683771, 24.54395039218662}, {95.589995289030483, 81.050822735322086},
{28.180450866082897, 28.837706255185282}, {60.128952916771617, 87.311672180570511}}},
{{{42.449716172390481, 52.379709366885805}, {27.896043159019225, 48.797373636065686},
{92.770268299044233, 89.899302036454571}, {12.102066544863426, 99.43241951960718}}},
{{{45.77532924980639, 45.958701495993274}, {37.458701356062065, 68.393691335056758},
{37.569326692060258, 27.673713456687381}, {60.674866037757539, 62.47349659096146}}},
{{{67.426548091427676, 37.993772624988935}, {23.483695892376684, 90.476863174921306},
{35.597065061143162, 79.872482633158796}, {75.38634169631932, 18.244890038969412}}},
{{{61.336508189019057, 82.693132843213675}, {44.639380902349664, 54.074825790745592},
{16.815615499771951, 20.049704667203923}, {41.866884958868326, 56.735503699973002}}},
{{{18.1312339, 31.6473732}, {95.5711034, 63.5350219}, {92.3283165, 62.0158945},
{18.5656052, 32.1268808}}},
{{{97.402018, 35.7169972}, {33.1127443, 25.8935163}, {1.13970027, 54.9424981},
{56.4860195, 60.529264}}},
};
const int testSetCount = (int) SK_ARRAY_COUNT(testSet);
static const SkDCubic newTestSet[] = {
{{{980.026001,1481.276}, {980.026001,1481.276}, {980.02594,1481.27576}, {980.025879,1481.27527}}},
{{{980.025879,1481.27527}, {980.025452,1481.27222}, {980.023743,1481.26038}, {980.02179,1481.24072}}},
{{{1.80943513,3.07782435}, {1.66686702,2.16806936}, {1.68301272,0}, {3,0}}},
{{{0,1}, {0,3}, {3,2}, {5,2}}},
{{{3.4386673,2.66977954}, {4.06668949,2.17046738}, {4.78887367,1.59629118}, {6,2}}},
{{{1.71985495,3.49467373}, {2.11620402,2.7201426}, {2.91897964,1.15138781}, {6,3}}},
{{{0,1}, {0.392703831,1.78540766}, {0.219947904,2.05676103}, {0.218561709,2.05630541}}},
{{{0.218561709,2.05630541}, {0.216418028,2.05560064}, {0.624105453,1.40486407}, {4.16666651,1.00000012}}},
{{{0, 1}, {3, 5}, {2, 1}, {3, 1}}},
{{{1.01366711f, 2.21379328f}, {1.09074128f, 2.23241305f}, {1.60246587f, 0.451849401f}, {5, 3}}},
{{{0, 1}, {0.541499972f, 3.16599989f}, {1.08299994f, 2.69299984f}, {2.10083938f, 1.80391729f}}},
{{{0.806384504f, 2.85426903f}, {1.52740121f, 1.99355423f}, {2.81689167f, 0.454222918f}, {5, 1}}},
{{{0, 1}, {1.90192389f, 2.90192389f}, {2.59807634f, 2.79422879f}, {3.1076951f, 2.71539044f}}},
{{{2, 3}, {2.36602545f, 3.36602545f}, {2.330127f, 3.06217766f}, {2.28460979f, 2.67691422f}}},
{{{0, 1}, {1.90192389f, 2.90192389f}, {2.59807634f, 2.79422879f}, {3.1076951f, 2.71539044f}}},
{{{2.28460979f, 2.67691422f}, {2.20577145f, 2.00961876f}, {2.09807634f, 1.09807622f}, {4, 3}}},
{{{0, 1}, {0.8211091160774231, 2.0948121547698975}, {0.91805583238601685, 2.515404224395752}, {0.91621249914169312, 2.5146586894989014}}},
{{{0.91621249914169312, 2.5146586894989014}, {0.91132104396820068, 2.5126807689666748}, {0.21079301834106445, -0.45617169141769409}, {10.5, -1.6666665077209473}}},
{{{42.6237564,68.9841232}, {32.449646,81.963089}, {14.7713947,103.565269}, {12.6310005,105.247002}}},
{{{37.2640038,95.3540039}, {37.2640038,95.3540039}, {11.3710003,83.7339935}, {-25.0779991,124.912003}}},
{{{0,1}, {4,5}, {6,0}, {1,0}}},
{{{0,6}, {0,1}, {1,0}, {5,4}}},
{{{0,1}, {4,6}, {5,1}, {6,2}}},
{{{1,5}, {2,6}, {1,0}, {6,4}}},
{{{322, 896.04803466796875}, {314.09201049804687, 833.4376220703125}, {260.24713134765625, 785}, {195, 785}}},
{{{195, 785}, {265.14016723632812, 785}, {322, 842.30755615234375}, {322, 913}}},
{{{1, 4}, {4, 5}, {3, 2}, {6, 3}}},
{{{2, 3}, {3, 6}, {4, 1}, {5, 4}}},
{{{67, 913}, {67, 917.388916015625}, {67.224380493164063, 921.72576904296875}, {67.662384033203125, 926}}},
{{{194, 1041}, {123.85984039306641, 1041}, {67, 983.69244384765625}, {67, 913}}},
{{{1,4}, {1,5}, {6,0}, {5,1}}},
{{{0,6}, {1,5}, {4,1}, {5,1}}},
{{{0,1}, {4,5}, {6,0}, {1,0}}},
{{{0,6}, {0,1}, {1,0}, {5,4}}},
{{{0,1}, {4,6}, {2,0}, {2,0}}},
{{{0,2}, {0,2}, {1,0}, {6,4}}},
{{{980.9000244140625, 1474.3280029296875}, {980.9000244140625, 1474.3280029296875}, {978.89300537109375, 1471.95703125}, {981.791015625, 1469.487060546875}}},
{{{981.791015625, 1469.487060546875}, {981.791015625, 1469.4859619140625}, {983.3580322265625, 1472.72900390625}, {980.9000244140625, 1474.3280029296875}}},
{{{275,532}, {277.209137,532}, {279,530.209106}, {279,528}}},
{{{278,529}, {278,530.65686}, {276.65686,532}, {275,532}}},
#if 0 // FIXME: asserts coincidence, not working yet
{{{195, 785}, {124.30755615234375, 785}, {67, 841.85986328125}, {67, 912}}},
{{{67, 913}, {67, 842.30755615234375}, {123.85984039306641, 785}, {194, 785}}},
#endif
{{{149,710.001465}, {149.000809,712.209961}, {150.791367,714}, {153,714}}},
{{{154,715}, {151.238571,715}, {149,712.761414}, {149,710}}},
{{{1,2}, {1,2}, {2,0}, {6,0}}},
{{{0,2}, {0,6}, {2,1}, {2,1}}},
{{{0,1}, {2,3}, {5,1}, {4,3}}},
{{{1,5}, {3,4}, {1,0}, {3,2}}},
{{{399,657}, {399,661.970581}, {403.029449,666}, {408,666}}},
{{{406,666}, {402.686279,666}, {400,663.313721}, {400,660}}},
{{{0,5}, {3,5}, {3,0}, {3,2}}},
{{{0,3}, {2,3}, {5,0}, {5,3}}},
{{{132, 11419}, {130.89543151855469, 11419}, {130, 11418.1044921875}, {130, 11417}}},
{{{3, 4}, {1, 5}, {4, 3}, {6, 4}}},
{{{3, 4}, {4, 6}, {4, 3}, {5, 1}}},
{{{130.04275512695312, 11417.413085937500 },
{130.23312377929687, 11418.319335937500 },
{131.03707885742187, 11419.000000000000 },
{132.00000000000000, 11419.000000000000 }}},
{{{132.00000000000000, 11419.000000000000 },
{130.89543151855469, 11419.000000000000 },
{130.00000000000000, 11418.104492187500 },
{130.00000000000000, 11417.000000000000 }}},
{{{1.0516976506771041, 2.9684399028541346 },
{1.0604363140895228, 2.9633503074444141 },
{1.0692548215065762, 2.9580354426587459 },
{1.0781560339512140, 2.9525043684031349 }}},
{{{1.0523038101345104, 2.9523755204833737 },
{1.0607035288264237, 2.9580853881628375 },
{1.0690530472271964, 2.9633896794787749 },
{1.0773566568712512, 2.9682969775000219 }}},
{{{1.0386522625066592, 2.9759024812329078 },
{1.0559713690392631, 2.9661782500838885 },
{1.0736041309019990, 2.9555348259177858 },
{1.0915734362784633, 2.9440446879826569 }}},
{{{1.0396670794879301, 2.9435062123457261 },
{1.0565690546812769, 2.9557413250983462 },
{1.0732616463413533, 2.9663369676594282 },
{1.0897791867435489, 2.9753618045797472 }}},
{{{0.8685656183311091, 3.0409266475785208 },
{0.99189542936395292, 3.0212163698184424 },
{1.1302108367493320, 2.9265646471747306 },
{1.2952305904872474, 2.7940808546473788 }}},
{{{0.85437872843682727, 2.7536036928549055 },
{1.0045584590592620, 2.9493041024831705 },
{1.1336998329885613, 3.0248027987251747 },
{1.2593809752247314, 3.0152560315809107 }}},
{{{0, 1}, {1, 6}, {1, 0}, {6, 2}}},
{{{0, 1}, {2, 6}, {1, 0}, {6, 1}}},
{{{134,11414}, {131.990234375,11414}, {130.32666015625,11415.482421875}, {130.04275512695312,11417.4130859375}}},
{{{132,11419}, {130.89543151855469,11419}, {130,11418.1044921875}, {130,11417}}},
{{{132,11419}, {130.89543151855469,11419}, {130,11418.1044921875}, {130,11417}}},
{{{130.04275512695312,11417.4130859375}, {130.23312377929687,11418.3193359375}, {131.03707885742187,11419}, {132,11419}}},
{{{0, 1}, {2, 3}, {5, 1}, {4, 3}}},
{{{1, 5}, {3, 4}, {1, 0}, {3, 2}}},
{{{3, 5}, {1, 6}, {5, 0}, {3, 1}}},
{{{0, 5}, {1, 3}, {5, 3}, {6, 1}}},
{{{0, 1}, {1, 5}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {1, 0}, {5, 1}}},
{{{1, 3}, {5, 6}, {5, 3}, {5, 4}}},
{{{3, 5}, {4, 5}, {3, 1}, {6, 5}}},
{{{0, 5}, {0, 5}, {5, 4}, {6, 4}}},
{{{4, 5}, {4, 6}, {5, 0}, {5, 0}}},
{{{0, 4}, {1, 3}, {5, 4}, {4, 2}}},
{{{4, 5}, {2, 4}, {4, 0}, {3, 1}}},
{{{0, 2}, {1, 5}, {3, 2}, {4, 1}}},
{{{2, 3}, {1, 4}, {2, 0}, {5, 1}}},
{{{0, 2}, {2, 3}, {5, 1}, {3, 2}}},
{{{1, 5}, {2, 3}, {2, 0}, {3, 2}}},
{{{2, 6}, {4, 5}, {1, 0}, {6, 1}}},
{{{0, 1}, {1, 6}, {6, 2}, {5, 4}}},
{{{0, 1}, {1, 2}, {6, 5}, {5, 4}}},
{{{5, 6}, {4, 5}, {1, 0}, {2, 1}}},
{{{2.5119999999999996, 1.5710000000000002}, {2.6399999999999983, 1.6599999999999997},
{2.8000000000000007, 1.8000000000000003}, {3, 2}}},
{{{2.4181876227114887, 1.9849772580462195}, {2.8269904869227211, 2.009330650246834},
{3.2004679292461624, 1.9942047174679169}, {3.4986199496818058, 2.0035994597094731}}},
{{{2, 3}, {1, 4}, {1, 0}, {6, 0}}},
{{{0, 1}, {0, 6}, {3, 2}, {4, 1}}},
{{{0, 2}, {1, 5}, {1, 0}, {6, 1}}},
{{{0, 1}, {1, 6}, {2, 0}, {5, 1}}},
{{{0, 1}, {1, 5}, {2, 1}, {4, 0}}},
{{{1, 2}, {0, 4}, {1, 0}, {5, 1}}},
{{{0, 1}, {3, 5}, {2, 1}, {3, 1}}},
{{{1, 2}, {1, 3}, {1, 0}, {5, 3}}},
{{{0, 1}, {2, 5}, {6, 0}, {5, 3}}},
{{{0, 6}, {3, 5}, {1, 0}, {5, 2}}},
{{{0, 1}, {3, 6}, {1, 0}, {5, 2}}},
{{{0, 1}, {2, 5}, {1, 0}, {6, 3}}},
{{{1, 2}, {5, 6}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {2, 1}, {6, 5}}},
{{{0, 6}, {1, 2}, {1, 0}, {1, 0}}},
{{{0, 1}, {0, 1}, {6, 0}, {2, 1}}},
{{{0, 2}, {0, 1}, {3, 0}, {1, 0}}},
{{{0, 3}, {0, 1}, {2, 0}, {1, 0}}},
};
const int newTestSetCount = (int) SK_ARRAY_COUNT(newTestSet);
static void oneOff(skiatest::Reporter* reporter, const SkDCubic& cubic1, const SkDCubic& cubic2,
bool coin) {
SkASSERT(ValidCubic(cubic1));
SkASSERT(ValidCubic(cubic2));
#if ONE_OFF_DEBUG
SkDebugf("computed quadratics given\n");
SkDebugf(" {{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}},\n",
cubic1[0].fX, cubic1[0].fY, cubic1[1].fX, cubic1[1].fY,
cubic1[2].fX, cubic1[2].fY, cubic1[3].fX, cubic1[3].fY);
SkDebugf(" {{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}},\n",
cubic2[0].fX, cubic2[0].fY, cubic2[1].fX, cubic2[1].fY,
cubic2[2].fX, cubic2[2].fY, cubic2[3].fX, cubic2[3].fY);
#endif
SkIntersections intersections;
intersections.intersect(cubic1, cubic2);
#if DEBUG_T_SECT_DUMP == 3
SkDebugf("</div>\n\n");
SkDebugf("<script type=\"text/javascript\">\n\n");
SkDebugf("var testDivs = [\n");
for (int index = 1; index <= gDumpTSectNum; ++index) {
SkDebugf("sect%d,\n", index);
}
#endif
if (coin && intersections.used() != 2) {
SkDebugf("");
}
REPORTER_ASSERT(reporter, !coin || intersections.used() == 2);
double tt1, tt2;
SkDPoint xy1, xy2;
for (int pt3 = 0; pt3 < intersections.used(); ++pt3) {
tt1 = intersections[0][pt3];
xy1 = cubic1.ptAtT(tt1);
tt2 = intersections[1][pt3];
xy2 = cubic2.ptAtT(tt2);
const SkDPoint& iPt = intersections.pt(pt3);
#if ONE_OFF_DEBUG
SkDebugf("%s t1=%1.9g (%1.9g, %1.9g) (%1.9g, %1.9g) (%1.9g, %1.9g) t2=%1.9g\n",
__FUNCTION__, tt1, xy1.fX, xy1.fY, iPt.fX,
iPt.fY, xy2.fX, xy2.fY, tt2);
#endif
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(iPt));
REPORTER_ASSERT(reporter, xy2.approximatelyEqual(iPt));
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
}
reporter->bumpTestCount();
}
static void oneOff(skiatest::Reporter* reporter, int outer, int inner) {
const SkDCubic& cubic1 = testSet[outer];
const SkDCubic& cubic2 = testSet[inner];
oneOff(reporter, cubic1, cubic2, false);
}
static void newOneOff(skiatest::Reporter* reporter, int outer, int inner) {
const SkDCubic& cubic1 = newTestSet[outer];
const SkDCubic& cubic2 = newTestSet[inner];
oneOff(reporter, cubic1, cubic2, false);
}
static void oneOffTests(skiatest::Reporter* reporter) {
for (int outer = 0; outer < testSetCount - 1; ++outer) {
for (int inner = outer + 1; inner < testSetCount; ++inner) {
oneOff(reporter, outer, inner);
}
}
for (int outer = 0; outer < newTestSetCount - 1; ++outer) {
for (int inner = outer + 1; inner < newTestSetCount; ++inner) {
newOneOff(reporter, outer, inner);
}
}
}
#define DEBUG_CRASH 0
static void CubicIntersection_RandTest(skiatest::Reporter* reporter) {
srand(0);
const int tests = 10000000;
#if !defined(SK_BUILD_FOR_WIN) && !defined(SK_BUILD_FOR_ANDROID)
unsigned seed = 0;
#endif
for (int test = 0; test < tests; ++test) {
SkDCubic cubic1, cubic2;
for (int i = 0; i < 4; ++i) {
cubic1[i].fX = static_cast<double>(SK_RAND(seed)) / RAND_MAX * 100;
cubic1[i].fY = static_cast<double>(SK_RAND(seed)) / RAND_MAX * 100;
cubic2[i].fX = static_cast<double>(SK_RAND(seed)) / RAND_MAX * 100;
cubic2[i].fY = static_cast<double>(SK_RAND(seed)) / RAND_MAX * 100;
}
#if DEBUG_CRASH
char str[1024];
snprintf(str, sizeof(str),
"{{{%1.9g, %1.9g}, {%1.9g, %1.9g}, {%1.9g, %1.9g}, {%1.9g, %1.9g}}},\n"
"{{{%1.9g, %1.9g}, {%1.9g, %1.9g}, {%1.9g, %1.9g}, {%1.9g, %1.9g}}},\n",
cubic1[0].fX, cubic1[0].fY, cubic1[1].fX, cubic1[1].fY, cubic1[2].fX, cubic1[2].fY,
cubic1[3].fX, cubic1[3].fY,
cubic2[0].fX, cubic2[0].fY, cubic2[1].fX, cubic2[1].fY, cubic2[2].fX, cubic2[2].fY,
cubic2[3].fX, cubic2[3].fY);
#endif
SkDRect rect1, rect2;
rect1.setBounds(cubic1);
rect2.setBounds(cubic2);
bool boundsIntersect = rect1.fLeft <= rect2.fRight && rect2.fLeft <= rect2.fRight
&& rect1.fTop <= rect2.fBottom && rect2.fTop <= rect1.fBottom;
if (test == -1) {
SkDebugf("ready...\n");
}
SkIntersections intersections2;
int newIntersects = intersections2.intersect(cubic1, cubic2);
if (!boundsIntersect && newIntersects) {
#if DEBUG_CRASH
SkDebugf("%s %d unexpected intersection boundsIntersect=%d "
" newIntersects=%d\n%s %s\n", __FUNCTION__, test, boundsIntersect,
newIntersects, __FUNCTION__, str);
#endif
REPORTER_ASSERT(reporter, 0);
}
for (int pt = 0; pt < intersections2.used(); ++pt) {
double tt1 = intersections2[0][pt];
SkDPoint xy1 = cubic1.ptAtT(tt1);
double tt2 = intersections2[1][pt];
SkDPoint xy2 = cubic2.ptAtT(tt2);
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
}
reporter->bumpTestCount();
}
}
static void intersectionFinder(int index0, int index1, double t1Seed, double t2Seed,
double t1Step, double t2Step) {
const SkDCubic& cubic1 = newTestSet[index0];
const SkDCubic& cubic2 = newTestSet[index1];
SkDPoint t1[3], t2[3];
bool toggle = true;
do {
t1[0] = cubic1.ptAtT(t1Seed - t1Step);
t1[1] = cubic1.ptAtT(t1Seed);
t1[2] = cubic1.ptAtT(t1Seed + t1Step);
t2[0] = cubic2.ptAtT(t2Seed - t2Step);
t2[1] = cubic2.ptAtT(t2Seed);
t2[2] = cubic2.ptAtT(t2Seed + t2Step);
double dist[3][3];
dist[1][1] = t1[1].distance(t2[1]);
int best_i = 1, best_j = 1;
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 3; ++j) {
if (i == 1 && j == 1) {
continue;
}
dist[i][j] = t1[i].distance(t2[j]);
if (dist[best_i][best_j] > dist[i][j]) {
best_i = i;
best_j = j;
}
}
}
if (best_i == 0) {
t1Seed -= t1Step;
} else if (best_i == 2) {
t1Seed += t1Step;
}
if (best_j == 0) {
t2Seed -= t2Step;
} else if (best_j == 2) {
t2Seed += t2Step;
}
if (best_i == 1 && best_j == 1) {
if ((toggle ^= true)) {
t1Step /= 2;
} else {
t2Step /= 2;
}
}
} while (!t1[1].approximatelyEqual(t2[1]));
t1Step = t2Step = 0.1;
double t10 = t1Seed - t1Step * 2;
double t12 = t1Seed + t1Step * 2;
double t20 = t2Seed - t2Step * 2;
double t22 = t2Seed + t2Step * 2;
SkDPoint test;
while (!approximately_zero(t1Step)) {
test = cubic1.ptAtT(t10);
t10 += t1[1].approximatelyEqual(test) ? -t1Step : t1Step;
t1Step /= 2;
}
t1Step = 0.1;
while (!approximately_zero(t1Step)) {
test = cubic1.ptAtT(t12);
t12 -= t1[1].approximatelyEqual(test) ? -t1Step : t1Step;
t1Step /= 2;
}
while (!approximately_zero(t2Step)) {
test = cubic2.ptAtT(t20);
t20 += t2[1].approximatelyEqual(test) ? -t2Step : t2Step;
t2Step /= 2;
}
t2Step = 0.1;
while (!approximately_zero(t2Step)) {
test = cubic2.ptAtT(t22);
t22 -= t2[1].approximatelyEqual(test) ? -t2Step : t2Step;
t2Step /= 2;
}
#if ONE_OFF_DEBUG
SkDebugf("%s t1=(%1.9g<%1.9g<%1.9g) t2=(%1.9g<%1.9g<%1.9g)\n", __FUNCTION__,
t10, t1Seed, t12, t20, t2Seed, t22);
SkDPoint p10 = cubic1.ptAtT(t10);
SkDPoint p1Seed = cubic1.ptAtT(t1Seed);
SkDPoint p12 = cubic1.ptAtT(t12);
SkDebugf("%s p1=(%1.9g,%1.9g)<(%1.9g,%1.9g)<(%1.9g,%1.9g)\n", __FUNCTION__,
p10.fX, p10.fY, p1Seed.fX, p1Seed.fY, p12.fX, p12.fY);
SkDPoint p20 = cubic2.ptAtT(t20);
SkDPoint p2Seed = cubic2.ptAtT(t2Seed);
SkDPoint p22 = cubic2.ptAtT(t22);
SkDebugf("%s p2=(%1.9g,%1.9g)<(%1.9g,%1.9g)<(%1.9g,%1.9g)\n", __FUNCTION__,
p20.fX, p20.fY, p2Seed.fX, p2Seed.fY, p22.fX, p22.fY);
#endif
}
static void CubicIntersection_IntersectionFinder() {
// double t1Seed = 0.87;
// double t2Seed = 0.87;
double t1Step = 0.000001;
double t2Step = 0.000001;
intersectionFinder(0, 1, 0.855895664, 0.864850875, t1Step, t2Step);
intersectionFinder(0, 1, 0.865207906, 0.865207887, t1Step, t2Step);
intersectionFinder(0, 1, 0.865213351, 0.865208087, t1Step, t2Step);
}
static const SkDCubic selfSet[] = {
{{{2, 3}, {0, 4}, {3, 2}, {5, 3}}},
{{{3, 6}, {2, 3}, {4, 0}, {3, 2}}},
{{{0, 2}, {2, 3}, {5, 1}, {3, 2}}},
{{{0, 2}, {3, 5}, {5, 0}, {4, 2}}},
{{{3.34, 8.98}, {1.95, 10.27}, {3.76, 7.65}, {4.96, 10.64}}},
{{{3.13, 2.74}, {1.08, 4.62}, {3.71, 0.94}, {2.01, 3.81}}},
{{{6.71, 3.14}, {7.99, 2.75}, {8.27, 1.96}, {6.35, 3.57}}},
{{{12.81, 7.27}, {7.22, 6.98}, {12.49, 8.97}, {11.42, 6.18}}},
};
int selfSetCount = (int) SK_ARRAY_COUNT(selfSet);
static void selfOneOff(skiatest::Reporter* reporter, int index) {
const SkDCubic& cubic = selfSet[index];
SkPoint c[4];
for (int i = 0; i < 4; ++i) {
c[i] = cubic[i].asSkPoint();
}
SkScalar loopT;
SkScalar d[3];
SkCubicType cubicType = SkClassifyCubic(c, d);
if (SkDCubic::ComplexBreak(c, &loopT) && cubicType == SkCubicType::kLoop_SkCubicType) {
SkIntersections i;
SkPoint twoCubics[7];
SkChopCubicAt(c, twoCubics, loopT);
SkDCubic chopped[2];
chopped[0].set(&twoCubics[0]);
chopped[1].set(&twoCubics[3]);
int result = i.intersect(chopped[0], chopped[1]);
REPORTER_ASSERT(reporter, result == 2);
REPORTER_ASSERT(reporter, i.used() == 2);
for (int index = 0; index < result; ++index) {
SkDPoint pt1 = chopped[0].ptAtT(i[0][index]);
SkDPoint pt2 = chopped[1].ptAtT(i[1][index]);
REPORTER_ASSERT(reporter, pt1.approximatelyEqual(pt2));
reporter->bumpTestCount();
}
}
}
static void cubicIntersectionSelfTest(skiatest::Reporter* reporter) {
int firstFail = 0;
for (int index = firstFail; index < selfSetCount; ++index) {
selfOneOff(reporter, index);
}
}
static const SkDCubic coinSet[] = {
{{{2, 3}, {0, 4}, {3, 2}, {5, 3}}},
{{{2, 3}, {0, 4}, {3, 2}, {5, 3}}},
{{{317, 711}, {322.52285766601562, 711}, {327, 715.4771728515625}, {327, 721}}},
{{{324.07107543945312, 713.928955078125}, {324.4051513671875, 714.26300048828125},
{324.71566772460937, 714.62060546875}, {325, 714.9990234375}}},
};
static int coinSetCount = (int) SK_ARRAY_COUNT(coinSet);
static void coinOneOff(skiatest::Reporter* reporter, int index) {
const SkDCubic& cubic1 = coinSet[index];
const SkDCubic& cubic2 = coinSet[index + 1];
oneOff(reporter, cubic1, cubic2, true);
}
static void cubicIntersectionCoinTest(skiatest::Reporter* reporter) {
int firstFail = 0;
for (int index = firstFail; index < coinSetCount; index += 2) {
coinOneOff(reporter, index);
}
}
DEF_TEST(PathOpsCubicCoinOneOff, reporter) {
coinOneOff(reporter, 0);
}
DEF_TEST(PathOpsCubicIntersectionOneOff, reporter) {
newOneOff(reporter, 0, 1);
}
DEF_TEST(PathOpsCubicSelfOneOff, reporter) {
selfOneOff(reporter, 0);
}
DEF_TEST(PathOpsCubicIntersection, reporter) {
oneOffTests(reporter);
cubicIntersectionSelfTest(reporter);
cubicIntersectionCoinTest(reporter);
standardTestCases(reporter);
if (false) CubicIntersection_IntersectionFinder();
if (false) CubicIntersection_RandTest(reporter);
}
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