1 /*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7 #include "PathOpsQuadIntersectionTestData.h"
8 #include "PathOpsTestCommon.h"
9 #include "SkIntersections.h"
10 #include "SkPathOpsRect.h"
11 #include "SkReduceOrder.h"
12 #include "Test.h"
13
standardTestCases(skiatest::Reporter * reporter)14 static void standardTestCases(skiatest::Reporter* reporter) {
15 bool showSkipped = false;
16 for (size_t index = 0; index < quadraticTests_count; ++index) {
17 const SkDQuad& quad1 = quadraticTests[index][0];
18 SkASSERT(ValidQuad(quad1));
19 const SkDQuad& quad2 = quadraticTests[index][1];
20 SkASSERT(ValidQuad(quad2));
21 SkReduceOrder reduce1, reduce2;
22 int order1 = reduce1.reduce(quad1);
23 int order2 = reduce2.reduce(quad2);
24 if (order1 < 3) {
25 if (showSkipped) {
26 SkDebugf("[%d] quad1 order=%d\n", static_cast<int>(index), order1);
27 }
28 }
29 if (order2 < 3) {
30 if (showSkipped) {
31 SkDebugf("[%d] quad2 order=%d\n", static_cast<int>(index), order2);
32 }
33 }
34 if (order1 == 3 && order2 == 3) {
35 SkIntersections intersections;
36 intersections.intersect(quad1, quad2);
37 if (intersections.used() > 0) {
38 for (int pt = 0; pt < intersections.used(); ++pt) {
39 double tt1 = intersections[0][pt];
40 SkDPoint xy1 = quad1.ptAtT(tt1);
41 double tt2 = intersections[1][pt];
42 SkDPoint xy2 = quad2.ptAtT(tt2);
43 if (!xy1.approximatelyEqual(xy2)) {
44 SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
45 __FUNCTION__, static_cast<int>(index), pt, tt1, xy1.fX, xy1.fY,
46 tt2, xy2.fX, xy2.fY);
47 REPORTER_ASSERT(reporter, 0);
48 }
49 }
50 }
51 }
52 }
53 }
54
55 static const SkDQuad testSet[] = {
56 {{{-708.00779269310044, -154.36998607290101}, {-707.90560262312511, -154.36998607290101}, {-707.8333433370193, -154.44224536635932}}},
57 {{{-708.00779269310044, -154.61669472244046}, {-701.04513225634582, -128.85970734043804}, {505.58447265625, -504.9130859375}}},
58
59 {{{164, -40}, {231.51681518554687, -40}, {279.25839233398438, 7.7416000366210938}}},
60 {{{279.25839233398438, 7.7416000366210938}, {275.2164306640625, 3.6996400356292725}, {271.03286743164062, -5.3290705182007514e-015}}},
61
62 {{{2.9999997378517067, 1.9737872594345709}, {2.9999997432230918, 1.9739647181863822}, {1.2414155459263587e-163, 5.2957833941332142e-315}}},
63 {{{2.9999047485265304, 1.9739164225694723}, {3.0000947268526112, 1.9738379076623633}, {0.61149411077591886, 0.0028382324376270418}}},
64
65 {{{2.9999996843656502, 1.9721416019045801}, {2.9999997725237835, 1.9749798343422071},
66 {5.3039068214821359e-315, 8.9546185262775165e-307}}},
67 {{{2.9984791443874976, 1.974505741312242}, {2.9999992702127476, 1.9738772171479178},
68 {3.0015187977319759, 1.9732495027303418}}},
69
70 {{{0.647069409,2.97691634}, {0.946860918,3.17625612}, {1.46875407,2.65105457}}},
71 {{{0,1}, {0.723699095,2.82756208}, {1.08907197,2.97497449}}},
72
73 {{{131.37418,11414.9825}, {130.28798,11415.9328}, {130.042755,11417.4131}}},
74 {{{130.585787,11418.4142}, {130.021447,11417.8498}, {130,11417}}},
75
76 {{{130.73167037963867, 11418.546386718750}, {131.26360225677490, 11418.985778808592},
77 {132, 11419 }}},
78 {{{132, 11419}, {131.15012693405151, 11418.978546142578},
79 {130.58578681945801, 11418.414184570313}}},
80
81 {{{132, 11419},
82 {130.73167037963867, 11418.546386718750}, {131.26360225677490, 11418.985778808592}}},
83 {{{131.15012693405151, 11418.978546142578},
84 {130.58578681945801, 11418.414184570313}, {132, 11419}}},
85
86 {{{3.0774019473063863, 3.35198509346713}, {3.0757503498668397, 3.327320623945933},
87 {3.0744102085015879, 3.3025879417907196}}},
88 {{{3.053913680774329, 3.3310471586283938}, {3.0758730889691694, 3.3273466070370152},
89 {3.0975671980059394, 3.3235031316554351}}},
90
91 {{{3.39068129, 4.44939202}, {3.03659239, 3.81843234}, {3.06844529, 3.02100922}}},
92 {{{2.10714698, 3.44196686}, {3.12180288, 3.38575704}, {3.75968569, 3.1281838}}},
93
94 {{{2.74792918, 4.77711896}, {2.82236867, 4.23882547}, {2.82848144, 3.63729341}}},
95 {{{2.62772567, 3.64823958}, {3.46652495, 3.64258364}, {4.1425079, 3.48623815}}},
96
97 {{{1.34375, 2.03125}, {2.2734375, 2.6640625}, {3.25, 3.25}}},
98 {{{3.96875, 4.65625}, {3.3359375, 3.7265625}, {2.75, 2.75}}},
99
100 {{{0, 1}, {0.324417544, 2.27953848}, {0.664376547, 2.58940267}}},
101 {{{1, 2}, {0.62109375, 2.70703125}, {0.640625, 2.546875}}},
102
103 {{{1, 2}, {0.984375, 2.3359375}, {1.0625, 2.15625}}},
104 {{{0, 1}, {0.983539095, 2.30041152}, {1.47325103, 2.61316872}}},
105
106 {{{4.09011926, 2.20971038}, {4.74608133, 1.9335932}, {5.02469918, 2.00694987}}},
107 {{{2.79472921, 1.73568666}, {3.36246373, 1.21251209}, {5, 2}}},
108
109 {{{1.80814127, 2.41537795}, {2.23475077, 2.05922313}, {3.16529668, 1.98358763}}},
110 {{{2.16505631, 2.55782454}, {2.40541285, 2.02193091}, {2.99836023, 1.68247638}}},
111
112 {{{3, 1.875}, {3.375, 1.54296875}, {3.375, 1.421875}}},
113 {{{3.375, 1.421875}, {3.3749999999999996, 1.3007812499999998}, {3, 2}}},
114
115 {{{3.34, 8.98}, {2.83363281, 9.4265625}, {2.83796875, 9.363125}}},
116 {{{2.83796875, 9.363125}, {2.84230469, 9.2996875}, {3.17875, 9.1725}}},
117
118 {{{2.7279999999999998, 3.024}, {2.5600000000000005, 2.5600000000000005},
119 {2.1520000000000001, 1.8560000000000001}}},
120 {{{0.66666666666666652, 1.1481481481481481}, {1.3333333333333326, 1.3333333333333335},
121 {2.6666666666666665, 2.1851851851851851}}},
122
123 {{{2.728, 3.024}, {2.56, 2.56}, {2.152, 1.856}}},
124 {{{0.666666667, 1.14814815}, {1.33333333, 1.33333333}, {2.66666667, 2.18518519}}},
125
126 {{{0.875, 1.5}, {1.03125, 1.11022302e-16}, {1, 0}}},
127 {{{0.875, 0.859375}, {1.6875, 0.73046875}, {2.5, 0.625}}},
128
129 {{{1.64451042, 0.0942001592}, {1.53635465, 0.00152863961}, {1, 0}}},
130 {{{1.27672209, 0.15}, {1.32143477, 9.25185854e-17}, {1, 0}}},
131
132 {{{0, 0}, {0.51851851851851849, 1.0185185185185186}, {1.2592592592592591, 1.9259259259259258}}},
133 {{{1.2592592592592593, 1.9259259259259265}, {0.51851851851851893, 1.0185185185185195}, {0, 0}}},
134
135 {{{1.93281168, 2.58856757}, {2.38543691, 2.7096125}, {2.51967352, 2.34531784}}},
136 {{{2.51967352, 2.34531784}, {2.65263731, 2.00639194}, {3.1212119, 1.98608967}}},
137 {{{2.09544533, 2.51981963}, {2.33331524, 2.25252128}, {2.92003302, 2.39442311}}},
138
139 {{{0.924337655, 1.94072717}, {1.25185043, 1.52836494}, {1.71793901, 1.06149951}}},
140 {{{0.940798831, 1.67439357}, {1.25988251, 1.39778567}, {1.71791672, 1.06650313}}},
141
142 {{{0.924337655, 1.94072717}, {1.39158994, 1.32418496}, {2.14967426, 0.687365435}}},
143 {{{0.940798831, 1.67439357}, {1.48941875, 1.16280321}, {2.47884711, 0.60465921}}},
144
145 {{{1.7465749139282332, 1.9930452039527999}, {1.8320006564080331, 1.859481345189089},
146 {1.8731035127758437, 1.6344055934266613}}},
147 {{{1.8731035127758437, 1.6344055934266613}, {1.89928170345231, 1.5006405518943067},
148 {1.9223833226085514, 1.3495796165215643}}},
149 {{{1.74657491, 1.9930452}, {1.87407679, 1.76762853}, {1.92238332, 1.34957962}}},
150 {{{0.60797907, 1.68776977}, {1.0447864, 1.50810914}, {1.87464474, 1.63655092}}},
151 {{{1.87464474, 1.63655092}, {2.70450308, 1.76499271}, {4, 3}}},
152
153 {{{1.2071879545809394, 0.82163474041730045}, {1.1534203513372994, 0.52790870069930229},
154 {1.0880000000000001, 0.29599999999999982}}}, //t=0.63155333662549329,0.80000000000000004
155 {{{0.33333333333333326, 0.81481481481481488}, {0.63395173631977997, 0.68744136726313931},
156 {1.205684411948591, 0.81344322326274499}}},
157 {{{0.33333333333333326, 0.81481481481481488}, {0.63396444791444551, 0.68743368362444768},
158 {1.205732763658403, 0.81345617746834109}}}, //t=0.33333333333333331, 0.63396444791444551
159 {{{1.205684411948591, 0.81344322326274499}, {1.2057085875611198, 0.81344969999329253},
160 {1.205732763658403, 0.81345617746834109}}},
161
162 {{{1.20718795, 0.82163474}, {1.15342035, 0.527908701}, {1.088, 0.296}}},
163 {{{1.20568441, 0.813443223}, {1.20570859, 0.8134497}, {1.20573276, 0.813456177}}},
164
165 {{{41.5072916, 87.1234036}, {28.2747836, 80.9545395}, {23.5780771, 69.3344126}}},
166 {{{72.9633878, 95.6593007}, {42.7738746, 88.4730382}, {31.1932785, 80.2458029}}},
167
168 {{{31.1663962, 54.7302484}, {31.1662882, 54.7301074}, {31.1663969, 54.7302485}}},
169 {{{26.0404936, 45.4260361}, {27.7887523, 33.1863051}, {40.8833242, 26.0301855}}},
170
171 {{{29.9404074, 49.1672596}, {44.3131071, 45.3915253}, {58.1067559, 59.5061814}}},
172 {{{72.6510251, 64.2972928}, {53.6989659, 60.1862397}, {35.2053722, 44.8391126}}},
173
174 {{{52.14807018377202, 65.012420045148644}, {44.778669050208237, 66.315562705604378},
175 {51.619118408823567, 63.787827046262684}}},
176 {{{30.004993234763383, 93.921296668202288}, {53.384822003076991, 60.732180341802753},
177 {58.652998934338584, 43.111073088306185}}},
178
179 {{{80.897794748143198, 49.236332042718459}, {81.082078218891212, 64.066749904488631},
180 {69.972305057149981, 72.968595519850993}}},
181 {{{72.503745601281395, 32.952320736577882}, {88.030880716061645, 38.137194847810164},
182 {73.193774825517906, 67.773492479591397}}},
183
184 {{{67.426548091427676, 37.993772624988935}, {51.129513170665035, 57.542281234563646},
185 {44.594748190899189, 65.644267382683879}}},
186 {{{61.336508189019057, 82.693132843213675}, {54.825078921449354, 71.663932799212432},
187 {47.727444217558926, 61.4049645128392}}},
188
189 {{{67.4265481, 37.9937726}, {51.1295132, 57.5422812}, {44.5947482, 65.6442674}}},
190 {{{61.3365082, 82.6931328}, {54.8250789, 71.6639328}, {47.7274442, 61.4049645}}},
191
192 {{{53.774852327053594, 53.318060789841951}, {45.787877803416805, 51.393492026284981},
193 {46.703936967162392, 53.06860709822206}}},
194 {{{46.703936967162392, 53.06860709822206}, {47.619996130907957, 54.74372217015916},
195 {53.020051653535361, 48.633140968832024}}},
196
197 {{{50.934805397717923, 51.52391952648901}, {56.803308902971423, 44.246234610627596},
198 {69.776888596721406, 40.166645096692555}}},
199 {{{50.230212796400401, 38.386469101526998}, {49.855620812184917, 38.818990392153609},
200 {56.356567496227363, 47.229909093319407}}},
201
202 {{{36.148792695174222, 70.336952793070424}, {36.141613037691357, 70.711654739870085},
203 {36.154708826402597, 71.088492662905836}}},
204 {{{35.216235592661825, 70.580199617313212}, {36.244476835123969, 71.010897787304074},
205 {37.230244263238326, 71.423156953613102}}},
206
207 // this pair is nearly coincident, and causes the quartic code to produce bad
208 // data. Mathematica doesn't think they touch. Graphically, I can't tell.
209 // it may not be so bad to pretend that they don't touch, if I can detect that
210 {{{369.848602, 145.680267}, {382.360413, 121.298294}, {406.207703, 121.298294}}},
211 {{{369.850525, 145.675964}, {382.362915, 121.29287}, {406.211273, 121.29287}}},
212
213 {{{33.567436351153468, 62.336347586395924}, {35.200980274619084, 65.038561460144479},
214 {36.479571811084995, 67.632178905412445}}},
215 {{{41.349524945572696, 67.886658677862641}, {39.125562529359087, 67.429772735149214},
216 {35.600314083992416, 66.705372160552685}}},
217
218 {{{67.25299631583178, 21.109080184767524}, {43.617595267398613, 33.658034168577529},
219 {33.38371819435676, 44.214192553988745}}},
220 {{{40.476838859398541, 39.543209911285999}, {36.701186108431131, 34.8817994016458},
221 {30.102144288878023, 26.739063172945315}}},
222
223 {{{25.367434474345036, 50.4712103169743}, {17.865013304933097, 37.356741010559439},
224 {16.818988838905465, 37.682915484123129}}},
225 {{{16.818988838905465, 37.682915484123129}, {15.772964372877833, 38.009089957686811},
226 {20.624104547604965, 41.825131596683121}}},
227
228 {{{26.440225044088567, 79.695009812848298}, {26.085525979582247, 83.717928354134784},
229 {27.075079976297072, 84.820633667838905}}},
230 {{{27.075079976297072, 84.820633667838905}, {28.276546859574015, 85.988574184029034},
231 {25.649263209500006, 87.166762066617025}}},
232
233 {{{34.879150914024962, 83.862726601601125}, {35.095810134304429, 83.693473210169543},
234 {35.359284111931586, 83.488069234177502}}},
235 {{{54.503204203015471, 76.094098492518242}, {51.366889541918894, 71.609856061299155},
236 {46.53086955445437, 69.949863036494207}}},
237
238 {{{0, 0}, {1, 0}, {0, 3}}},
239 {{{1, 0}, {0, 1}, {1, 1}}},
240 {{{369.961151, 137.980698}, {383.970093, 121.298294}, {406.213287, 121.298294}}},
241 {{{353.2948, 194.351074}, {353.2948, 173.767563}, {364.167572, 160.819855}}},
242 {{{360.416077, 166.795715}, {370.126831, 147.872162}, {388.635406, 147.872162}}},
243 {{{406.236359, 121.254936}, {409.445679, 121.254936}, {412.975952, 121.789818}}},
244 {{{406.235992, 121.254936}, {425.705902, 121.254936}, {439.71994, 137.087616}}},
245
246 {{{369.8543701171875, 145.66734313964844}, {382.36788940429688, 121.28203582763672},
247 {406.21844482421875, 121.28203582763672}}},
248 {{{369.96469116210938, 137.96672058105469}, {383.97555541992188, 121.28203582763672},
249 {406.2218017578125, 121.28203582763672}}},
250
251 {{{369.962311, 137.976044}, {383.971893, 121.29287}, {406.216125, 121.29287}}},
252
253 {{{400.121704, 149.468719}, {391.949493, 161.037186}, {391.949493, 181.202423}}},
254 {{{391.946747, 181.839218}, {391.946747, 155.62442}, {406.115479, 138.855438}}},
255 {{{360.048828125, 229.2578125}, {360.048828125, 224.4140625}, {362.607421875, 221.3671875}}},
256 {{{362.607421875, 221.3671875}, {365.166015625, 218.3203125}, {369.228515625, 218.3203125}}},
257 {{{8, 8}, {10, 10}, {8, -10}}},
258 {{{8, 8}, {12, 12}, {14, 4}}},
259 {{{8, 8}, {9, 9}, {10, 8}}}
260 };
261
262 const size_t testSetCount = SK_ARRAY_COUNT(testSet);
263
oneOffTest1(skiatest::Reporter * reporter,size_t outer,size_t inner)264 static void oneOffTest1(skiatest::Reporter* reporter, size_t outer, size_t inner) {
265 const SkDQuad& quad1 = testSet[outer];
266 SkASSERT(ValidQuad(quad1));
267 const SkDQuad& quad2 = testSet[inner];
268 SkASSERT(ValidQuad(quad2));
269 SkIntersections intersections2;
270 intersections2.intersect(quad1, quad2);
271 for (int pt = 0; pt < intersections2.used(); ++pt) {
272 double tt1 = intersections2[0][pt];
273 SkDPoint xy1 = quad1.ptAtT(tt1);
274 double tt2 = intersections2[1][pt];
275 SkDPoint xy2 = quad2.ptAtT(tt2);
276 if (!xy1.approximatelyEqual(xy2)) {
277 SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
278 __FUNCTION__, static_cast<int>(outer), static_cast<int>(inner),
279 tt1, xy1.fX, xy1.fY, tt2, xy2.fX, xy2.fY);
280 REPORTER_ASSERT(reporter, 0);
281 }
282 #if ONE_OFF_DEBUG
283 SkDebugf("%s [%d][%d] t1=%1.9g (%1.9g, %1.9g) t2=%1.9g\n", __FUNCTION__,
284 outer, inner, tt1, xy1.fX, xy1.fY, tt2);
285 #endif
286 }
287 }
288
DEF_TEST(PathOpsQuadIntersectionOneOff,reporter)289 DEF_TEST(PathOpsQuadIntersectionOneOff, reporter) {
290 oneOffTest1(reporter, 0, 1);
291 }
292
oneOffTests(skiatest::Reporter * reporter)293 static void oneOffTests(skiatest::Reporter* reporter) {
294 for (size_t outer = 0; outer < testSetCount - 1; ++outer) {
295 for (size_t inner = outer + 1; inner < testSetCount; ++inner) {
296 oneOffTest1(reporter, outer, inner);
297 }
298 }
299 }
300
301 static const SkDQuad coincidentTestSet[] = {
302 #if 0
303 {{{97.9337615966796875,100}, {88,112.94264984130859375}, {88,130}}},
304 {{{88,130}, {88,124.80951690673828125}, {88.91983795166015625,120}}},
305 #endif
306 {{{369.850525, 145.675964}, {382.362915, 121.29287}, {406.211273, 121.29287}}},
307 {{{369.850525, 145.675964}, {382.362915, 121.29287}, {406.211273, 121.29287}}},
308 {{{8, 8}, {10, 10}, {8, -10}}},
309 {{{8, -10}, {10, 10}, {8, 8}}},
310 };
311
312 static const int coincidentTestSetCount = (int) SK_ARRAY_COUNT(coincidentTestSet);
313
coincidentTestOne(skiatest::Reporter * reporter,int test1,int test2)314 static void coincidentTestOne(skiatest::Reporter* reporter, int test1, int test2) {
315 const SkDQuad& quad1 = coincidentTestSet[test1];
316 SkASSERT(ValidQuad(quad1));
317 const SkDQuad& quad2 = coincidentTestSet[test2];
318 SkASSERT(ValidQuad(quad2));
319 SkIntersections intersections2;
320 intersections2.intersect(quad1, quad2);
321 REPORTER_ASSERT(reporter, intersections2.coincidentUsed() == 2);
322 REPORTER_ASSERT(reporter, intersections2.used() == 2);
323 for (int pt = 0; pt < intersections2.coincidentUsed(); ++pt) {
324 double tt1 = intersections2[0][pt];
325 double tt2 = intersections2[1][pt];
326 SkDPoint pt1 = quad1.ptAtT(tt1);
327 SkDPoint pt2 = quad2.ptAtT(tt2);
328 REPORTER_ASSERT(reporter, pt1.approximatelyEqual(pt2));
329 }
330 }
331
coincidentTest(skiatest::Reporter * reporter)332 static void coincidentTest(skiatest::Reporter* reporter) {
333 for (int testIndex = 0; testIndex < coincidentTestSetCount - 1; testIndex += 2) {
334 coincidentTestOne(reporter, testIndex, testIndex + 1);
335 }
336 }
337
DEF_TEST(PathOpsQuadIntersectionCoincidenceOneOff,reporter)338 DEF_TEST(PathOpsQuadIntersectionCoincidenceOneOff, reporter) {
339 coincidentTestOne(reporter, 0, 1);
340 }
341
floatSign(double x)342 static int floatSign(double x) {
343 return x < 0 ? -1 : x > 0 ? 1 : 0;
344 }
345
346 static const SkDQuad pointFinderTestSet[] = {
347 //>=0.633974464 0.633974846 <=
348 {{{1.2071879545809394, 0.82163474041730045}, {1.1534203513372994, 0.52790870069930229},
349 {1.0880000000000001, 0.29599999999999982}}}, //t=0.63155333662549329, 0.80000000000000004
350 {{{1.2071879545809394, 0.82163474041730045}, {1.2065040319428038, 0.81766753259119995},
351 {1.2058123269101506, 0.81370135061854221}}}, //t=0.63155333662549329, 0.6339049773632347
352 {{{1.2058123269101506, 0.81370135061854221}, {1.152376363978022, 0.5244097415381026},
353 {1.0880000000000001, 0.29599999999999982}}}, //t=0.6339049773632347, 0.80000000000000004
354 //>=0.633974083 0.633975227 <=
355 {{{0.33333333333333326, 0.81481481481481488}, {0.63395173631977997, 0.68744136726313931},
356 {1.205684411948591, 0.81344322326274499}}}, //t=0.33333333333333331, 0.63395173631977986
357 {{{0.33333333333333326, 0.81481481481481488}, {0.63396444791444551, 0.68743368362444768},
358 {1.205732763658403, 0.81345617746834109}}}, //t=0.33333333333333331, 0.63396444791444551
359 {{{1.205684411948591, 0.81344322326274499}, {1.2057085875611198, 0.81344969999329253},
360 {1.205732763658403, 0.81345617746834109}}}, //t=0.63395173631977986, 0.63396444791444551
361 {{{1.205732763658403, 0.81345617746834109}, {1.267928895828891, 0.83008534558465619},
362 {1.3333333333333333, 0.85185185185185175}}}, //t=0.63396444791444551, 0.66666666666666663
363 };
364
pointFinder(const SkDQuad & q1,const SkDQuad & q2)365 static void pointFinder(const SkDQuad& q1, const SkDQuad& q2) {
366 for (int index = 0; index < 3; ++index) {
367 double t = q1.nearestT(q2[index]);
368 SkDPoint onQuad = q1.ptAtT(t);
369 SkDebugf("%s t=%1.9g (%1.9g,%1.9g) dist=%1.9g\n", __FUNCTION__, t, onQuad.fX, onQuad.fY,
370 onQuad.distance(q2[index]));
371 double left[3];
372 left[0] = ((const SkDLine&) q1[0]).isLeft(q2[index]);
373 left[1] = ((const SkDLine&) q1[1]).isLeft(q2[index]);
374 SkDLine diag = {{q1[0], q1[2]}};
375 left[2] = diag.isLeft(q2[index]);
376 SkDebugf("%s left=(%d, %d, %d) inHull=%s\n", __FUNCTION__, floatSign(left[0]),
377 floatSign(left[1]), floatSign(left[2]),
378 q1.pointInHull(q2[index]) ? "true" : "false");
379 }
380 SkDebugf("\n");
381 }
382
hullIntersect(const SkDQuad & q1,const SkDQuad & q2)383 static void hullIntersect(const SkDQuad& q1, const SkDQuad& q2) {
384 SkDebugf("%s", __FUNCTION__);
385 SkIntersections ts;
386 for (int i1 = 0; i1 < 3; ++i1) {
387 SkDLine l1 = {{q1[i1], q1[(i1 + 1) % 3]}};
388 for (int i2 = 0; i2 < 3; ++i2) {
389 SkDLine l2 = {{q2[i2], q2[(i2 + 1) % 3]}};
390 if (ts.intersect(l1, l2)) {
391 SkDebugf(" [%d,%d]", i1, i2);
392 }
393 }
394 }
395 SkDebugf("\n");
396 }
397
QuadraticIntersection_PointFinder()398 static void QuadraticIntersection_PointFinder() {
399 pointFinder(pointFinderTestSet[0], pointFinderTestSet[4]);
400 pointFinder(pointFinderTestSet[4], pointFinderTestSet[0]);
401 pointFinder(pointFinderTestSet[0], pointFinderTestSet[6]);
402 pointFinder(pointFinderTestSet[6], pointFinderTestSet[0]);
403 hullIntersect(pointFinderTestSet[0], pointFinderTestSet[4]);
404 hullIntersect(pointFinderTestSet[0], pointFinderTestSet[6]);
405 }
406
intersectionFinder(int test1,int test2)407 static void intersectionFinder(int test1, int test2) {
408 const SkDQuad& quad1 = testSet[test1];
409 const SkDQuad& quad2 = testSet[test2];
410
411 double t1Seed = 0.5;
412 double t2Seed = 0.8;
413 double t1Step = 0.1;
414 double t2Step = 0.1;
415 SkDPoint t1[3], t2[3];
416 bool toggle = true;
417 do {
418 t1[0] = quad1.ptAtT(t1Seed - t1Step);
419 t1[1] = quad1.ptAtT(t1Seed);
420 t1[2] = quad1.ptAtT(t1Seed + t1Step);
421 t2[0] = quad2.ptAtT(t2Seed - t2Step);
422 t2[1] = quad2.ptAtT(t2Seed);
423 t2[2] = quad2.ptAtT(t2Seed + t2Step);
424 double dist[3][3];
425 dist[1][1] = t1[1].distance(t2[1]);
426 int best_i = 1, best_j = 1;
427 for (int i = 0; i < 3; ++i) {
428 for (int j = 0; j < 3; ++j) {
429 if (i == 1 && j == 1) {
430 continue;
431 }
432 dist[i][j] = t1[i].distance(t2[j]);
433 if (dist[best_i][best_j] > dist[i][j]) {
434 best_i = i;
435 best_j = j;
436 }
437 }
438 }
439 if (best_i == 0) {
440 t1Seed -= t1Step;
441 } else if (best_i == 2) {
442 t1Seed += t1Step;
443 }
444 if (best_j == 0) {
445 t2Seed -= t2Step;
446 } else if (best_j == 2) {
447 t2Seed += t2Step;
448 }
449 if (best_i == 1 && best_j == 1) {
450 if ((toggle ^= true)) {
451 t1Step /= 2;
452 } else {
453 t2Step /= 2;
454 }
455 }
456 } while (!t1[1].approximatelyEqual(t2[1]));
457 t1Step = t2Step = 0.1;
458 double t10 = t1Seed - t1Step * 2;
459 double t12 = t1Seed + t1Step * 2;
460 double t20 = t2Seed - t2Step * 2;
461 double t22 = t2Seed + t2Step * 2;
462 SkDPoint test;
463 while (!approximately_zero(t1Step)) {
464 test = quad1.ptAtT(t10);
465 t10 += t1[1].approximatelyEqual(test) ? -t1Step : t1Step;
466 t1Step /= 2;
467 }
468 t1Step = 0.1;
469 while (!approximately_zero(t1Step)) {
470 test = quad1.ptAtT(t12);
471 t12 -= t1[1].approximatelyEqual(test) ? -t1Step : t1Step;
472 t1Step /= 2;
473 }
474 while (!approximately_zero(t2Step)) {
475 test = quad2.ptAtT(t20);
476 t20 += t2[1].approximatelyEqual(test) ? -t2Step : t2Step;
477 t2Step /= 2;
478 }
479 t2Step = 0.1;
480 while (!approximately_zero(t2Step)) {
481 test = quad2.ptAtT(t22);
482 t22 -= t2[1].approximatelyEqual(test) ? -t2Step : t2Step;
483 t2Step /= 2;
484 }
485 #if ONE_OFF_DEBUG
486 SkDebugf("%s t1=(%1.9g<%1.9g<%1.9g) t2=(%1.9g<%1.9g<%1.9g)\n", __FUNCTION__,
487 t10, t1Seed, t12, t20, t2Seed, t22);
488 SkDPoint p10 = quad1.ptAtT(t10);
489 SkDPoint p1Seed = quad1.ptAtT(t1Seed);
490 SkDPoint p12 = quad1.ptAtT(t12);
491 SkDebugf("%s p1=(%1.9g,%1.9g)<(%1.9g,%1.9g)<(%1.9g,%1.9g)\n", __FUNCTION__,
492 p10.fX, p10.fY, p1Seed.fX, p1Seed.fY, p12.fX, p12.fY);
493 SkDPoint p20 = quad2.ptAtT(t20);
494 SkDPoint p2Seed = quad2.ptAtT(t2Seed);
495 SkDPoint p22 = quad2.ptAtT(t22);
496 SkDebugf("%s p2=(%1.9g,%1.9g)<(%1.9g,%1.9g)<(%1.9g,%1.9g)\n", __FUNCTION__,
497 p20.fX, p20.fY, p2Seed.fX, p2Seed.fY, p22.fX, p22.fY);
498 #endif
499 }
500
QuadraticIntersection_IntersectionFinder()501 static void QuadraticIntersection_IntersectionFinder() {
502 intersectionFinder(0, 1);
503 }
504
DEF_TEST(PathOpsQuadIntersection,reporter)505 DEF_TEST(PathOpsQuadIntersection, reporter) {
506 oneOffTests(reporter);
507 coincidentTest(reporter);
508 standardTestCases(reporter);
509 if (false) QuadraticIntersection_IntersectionFinder();
510 if (false) QuadraticIntersection_PointFinder();
511 }
512