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caryclark1049f122015-04-20 08:31:59 -07001/*
2 * Copyright 2015 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 "PathOpsTestCommon.h"
8#include "SkGeometry.h"
9#include "SkIntersections.h"
10#include "Test.h"
11
12/*
13manually compute the intersection of a pair of circles and see if the conic intersection matches
14 given two circles
15 construct a line connecting their centers
16
17 */
18
19static const SkDConic testSet[] = {
20 {{{{-4,1}, {-4,5}, {0,5}}}, 0.707106769f},
21 {{{{-3,4}, {-3,1}, {0,1}}}, 0.707106769f},
22
23 {{{{0, 0}, {0, 1}, {1, 1}}}, 0.5f},
24 {{{{1, 0}, {0, 0}, {0, 1}}}, 0.5f},
25};
26
27const int testSetCount = (int) SK_ARRAY_COUNT(testSet);
28
29static void oneOff(skiatest::Reporter* reporter, const SkDConic& c1, const SkDConic& c2,
30 bool coin) {
31 SkASSERT(ValidConic(c1));
32 SkASSERT(ValidConic(c2));
33 SkIntersections intersections;
34 intersections.intersect(c1, c2);
35 if (coin && intersections.used() != 2) {
36 SkDebugf("");
37 }
38 REPORTER_ASSERT(reporter, !coin || intersections.used() == 2);
39 double tt1, tt2;
40 SkDPoint xy1, xy2;
41 for (int pt3 = 0; pt3 < intersections.used(); ++pt3) {
42 tt1 = intersections[0][pt3];
43 xy1 = c1.ptAtT(tt1);
44 tt2 = intersections[1][pt3];
45 xy2 = c2.ptAtT(tt2);
46 const SkDPoint& iPt = intersections.pt(pt3);
47 REPORTER_ASSERT(reporter, xy1.approximatelyEqual(iPt));
48 REPORTER_ASSERT(reporter, xy2.approximatelyEqual(iPt));
49 REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
50 }
51 reporter->bumpTestCount();
52}
53
54static void oneOff(skiatest::Reporter* reporter, int outer, int inner) {
55 const SkDConic& c1 = testSet[outer];
56 const SkDConic& c2 = testSet[inner];
57 oneOff(reporter, c1, c2, false);
58}
59
60static void oneOffTests(skiatest::Reporter* reporter) {
61 for (int outer = 0; outer < testSetCount - 1; ++outer) {
62 for (int inner = outer + 1; inner < testSetCount; ++inner) {
63 oneOff(reporter, outer, inner);
64 }
65 }
66}
67
68DEF_TEST(PathOpsConicIntersectionOneOff, reporter) {
69 oneOff(reporter, 0, 1);
70}
71
72DEF_TEST(PathOpsConicIntersection, reporter) {
73 oneOffTests(reporter);
74}