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Diffstat (limited to 'tests/TriangulationTest.cpp')
| -rw-r--r-- | tests/TriangulationTest.cpp | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/tests/TriangulationTest.cpp b/tests/TriangulationTest.cpp new file mode 100644 index 0000000..9d47181 --- /dev/null +++ b/tests/TriangulationTest.cpp @@ -0,0 +1,292 @@ +#include "Test.h" +#include "../../src/core/SkConcaveToTriangles.h" +#include "SkGeometry.h" + +static int GetIndexFromPoint(const SkPoint &pt, + int numPts, const SkPoint *pts) { + for (int i = 0; i < numPts; ++i) + if (pt.fX == pts[i].fX && pt.fY == pts[i].fY) + return i; + return -1; +} + + +bool gPrintTriangles = false; // Can we set this on the command line? + +static void PrintTriangles(const SkTDArray<SkPoint> &triangles, + int numPts, const SkPoint *pts, + skiatest::Reporter* reporter) { + if (gPrintTriangles) { + SkPoint *p = triangles.begin(); + int n = triangles.count(); + REPORTER_ASSERT(reporter, n % 3 == 0); + n /= 3; + printf("%d Triangles:\n{\n", n); + for (; n-- != 0; p += 3) + printf(" { {%.7g, %.7g}, {%.7g, %.7g}, {%.7g, %.7g} }, " + "// { %2d, %2d, %2d }\n", + p[0].fX, p[0].fY, + p[1].fX, p[1].fY, + p[2].fX, p[2].fY, + GetIndexFromPoint(p[0], numPts, pts), + GetIndexFromPoint(p[1], numPts, pts), + GetIndexFromPoint(p[2], numPts, pts)); + printf("}\n"); + } +} + + +static bool CompareTriangleList(int numTriangles, + const float refTriangles[][3][2], + const SkTDArray<SkPoint> &triangles) { + if (triangles.count() != numTriangles * 3) { + printf("Expected %d triangles, not %d\n", + numTriangles, triangles.count() / 3); + return false; + } + int numErrors = 0; + for (int i = 0; i < numTriangles; ++i) { + const float *r = &refTriangles[i][0][0]; + const SkScalar *t = &triangles[i * 3].fX; + bool equalTriangle = true; + for (int j = 6; j-- != 0; r++, t++) + if (SkFloatToScalar(*r) != *t) + equalTriangle = false; + if (equalTriangle == false) { + ++numErrors; + printf("Triangle %d differs\n", i); + } + } + if (numErrors > 0) + printf("%d triangles differ\n", numErrors); + return numErrors == 0; +} + + +#ifndef LEFT_HANDED_POLYGONS +static const SkPoint star[] = { + // Outer contour is clockwise if Y is down, counterclockwise if Y is up. + { SkFloatToScalar(110), SkFloatToScalar( 20) }, + { SkFloatToScalar(100), SkFloatToScalar( 50) }, + { SkFloatToScalar(130), SkFloatToScalar( 80) }, + { SkFloatToScalar( 90), SkFloatToScalar( 80) }, + { SkFloatToScalar( 70), SkFloatToScalar(120) }, + { SkFloatToScalar( 50), SkFloatToScalar( 80) }, + { SkFloatToScalar( 10), SkFloatToScalar( 80) }, + { SkFloatToScalar( 40), SkFloatToScalar( 50) }, + { SkFloatToScalar( 30), SkFloatToScalar( 20) }, + { SkFloatToScalar( 70), SkFloatToScalar( 40) }, + // Inner contour is counterclockwise if Y is down, clockwise if Y is up. + { SkFloatToScalar(110), SkFloatToScalar( 20) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) }, + { SkFloatToScalar( 60), SkFloatToScalar( 60) }, + { SkFloatToScalar( 60), SkFloatToScalar( 70) }, + { SkFloatToScalar( 80), SkFloatToScalar( 70) }, + { SkFloatToScalar( 80), SkFloatToScalar( 60) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) } +}; +static const SkPoint plus[] = { + { SkFloatToScalar( 70), SkFloatToScalar( 10) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) }, + { SkFloatToScalar(110), SkFloatToScalar( 50) }, + { SkFloatToScalar(110), SkFloatToScalar( 70) }, + { SkFloatToScalar( 70), SkFloatToScalar( 70) }, + { SkFloatToScalar( 70), SkFloatToScalar(110) }, + { SkFloatToScalar( 50), SkFloatToScalar(110) }, + { SkFloatToScalar( 50), SkFloatToScalar( 70) }, + { SkFloatToScalar( 10), SkFloatToScalar( 70) }, + { SkFloatToScalar( 10), SkFloatToScalar( 50) }, + { SkFloatToScalar( 50), SkFloatToScalar( 50) }, + { SkFloatToScalar( 50), SkFloatToScalar( 10) } +}; +static const SkPoint zipper[] = { + { SkFloatToScalar( 10), SkFloatToScalar( 60) }, + { SkFloatToScalar( 10), SkFloatToScalar( 10) }, + { SkFloatToScalar( 20), SkFloatToScalar( 10) }, + { SkFloatToScalar( 20), SkFloatToScalar( 50) }, + { SkFloatToScalar( 30), SkFloatToScalar( 50) }, + { SkFloatToScalar( 30), SkFloatToScalar( 10) }, + { SkFloatToScalar( 60), SkFloatToScalar( 10) }, + { SkFloatToScalar( 60), SkFloatToScalar( 50) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) }, + { SkFloatToScalar( 70), SkFloatToScalar( 10) }, + { SkFloatToScalar(100), SkFloatToScalar( 10) }, + { SkFloatToScalar(100), SkFloatToScalar( 50) }, + { SkFloatToScalar(110), SkFloatToScalar( 50) }, + { SkFloatToScalar(110), SkFloatToScalar( 10) }, + { SkFloatToScalar(140), SkFloatToScalar( 10) }, + { SkFloatToScalar(140), SkFloatToScalar( 60) }, + { SkFloatToScalar(130), SkFloatToScalar( 60) }, + { SkFloatToScalar(130), SkFloatToScalar( 20) }, + { SkFloatToScalar(120), SkFloatToScalar( 20) }, + { SkFloatToScalar(120), SkFloatToScalar( 60) }, + { SkFloatToScalar( 90), SkFloatToScalar( 60) }, + { SkFloatToScalar( 90), SkFloatToScalar( 20) }, + { SkFloatToScalar( 80), SkFloatToScalar( 20) }, + { SkFloatToScalar( 80), SkFloatToScalar( 60) }, + { SkFloatToScalar( 50), SkFloatToScalar( 60) }, + { SkFloatToScalar( 50), SkFloatToScalar( 20) }, + { SkFloatToScalar( 40), SkFloatToScalar( 20) }, + { SkFloatToScalar( 40), SkFloatToScalar( 60) } +}; +#else // LEFT_HANDED_POLYGONS +static const SkPoint star[] = { + // Outer contour is counterclockwise if Y is down, clockwise if Y is up. + { SkFloatToScalar(110), SkFloatToScalar( 20) }, + { SkFloatToScalar( 70), SkFloatToScalar( 40) }, + { SkFloatToScalar( 30), SkFloatToScalar( 20) }, + { SkFloatToScalar( 40), SkFloatToScalar( 50) }, + { SkFloatToScalar( 10), SkFloatToScalar( 80) }, + { SkFloatToScalar( 50), SkFloatToScalar( 80) }, + { SkFloatToScalar( 70), SkFloatToScalar(120) }, + { SkFloatToScalar( 90), SkFloatToScalar( 80) }, + { SkFloatToScalar(130), SkFloatToScalar( 80) }, + { SkFloatToScalar(100), SkFloatToScalar( 50) }, + // Inner contour is clockwise if Y is down, counterclockwise if Y is up. + { SkFloatToScalar(110), SkFloatToScalar( 20) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) }, + { SkFloatToScalar( 80), SkFloatToScalar( 60) }, + { SkFloatToScalar( 80), SkFloatToScalar( 70) }, + { SkFloatToScalar( 60), SkFloatToScalar( 70) }, + { SkFloatToScalar( 60), SkFloatToScalar( 60) }, + { SkFloatToScalar( 70), SkFloatToScalar( 50) } +}; +#endif // LEFT_HANDED_POLYGONS +#define kNumStarVertices 10 +#define kNumStarHoleVertices (sizeof(star) / sizeof(star[0])) + + +// Star test +static void TestStarTriangulation(skiatest::Reporter* reporter) { + static const float refTriangles[][3][2] = { + { { 30, 20}, { 70, 40}, { 40, 50} }, // { 8, 9, 7 } + { {100, 50}, { 10, 80}, { 40, 50} }, // { 1, 6, 7 } + { {100, 50}, { 40, 50}, { 70, 40} }, // { 1, 7, 9 } + { {100, 50}, { 70, 40}, {110, 20} }, // { 1, 9, 0 } + { { 90, 80}, { 70, 120}, { 50, 80} }, // { 3, 4, 5 } + { {130, 80}, { 90, 80}, { 50, 80} }, // { 2, 3, 5 } degen + { {130, 80}, { 50, 80}, { 10, 80} }, // { 2, 5, 6 } degen + { {130, 80}, { 10, 80}, {100, 50} } // { 2, 6, 1 } + }; + const size_t numRefTriangles = sizeof(refTriangles) + / (6 * sizeof(refTriangles[0][0][0])); + SkTDArray<SkPoint> triangles; + bool success = SkConcaveToTriangles(kNumStarVertices, star, &triangles); + PrintTriangles(triangles, kNumStarVertices, star, reporter); + success = CompareTriangleList(numRefTriangles, refTriangles, triangles) + && success; + reporter->report("Triangulate Star", success ? reporter->kPassed + : reporter->kFailed); +} + + +// Star with hole test +static void TestStarHoleTriangulation(skiatest::Reporter* reporter) { + static const float refTriangles[][3][2] = { + { {100, 50}, { 80, 60}, { 70, 50} }, // { 1, 15, 16 } + { {100, 50}, { 70, 50}, {110, 20} }, // { 1, 16, 0 } + { { 30, 20}, { 70, 40}, { 40, 50} }, // { 8, 9, 7 } + { { 60, 70}, { 80, 70}, { 10, 80} }, // { 13, 14, 6 } + { { 60, 60}, { 60, 70}, { 10, 80} }, // { 12, 13, 6 } + { { 70, 50}, { 60, 60}, { 10, 80} }, // { 11, 12, 6 } + { { 70, 50}, { 10, 80}, { 40, 50} }, // { 11, 6, 7 } + { { 70, 50}, { 40, 50}, { 70, 40} }, // { 11, 7, 9 } + { { 70, 50}, { 70, 40}, {110, 20} }, // { 11, 9, 10 } + { { 90, 80}, { 70, 120}, { 50, 80} }, // { 3, 4, 5 } + { {130, 80}, { 90, 80}, { 50, 80} }, // { 2, 3, 5 } degen + { {130, 80}, { 50, 80}, { 10, 80} }, // { 2, 5, 6 } degen + { {130, 80}, { 10, 80}, { 80, 70} }, // { 2, 6, 14 } + { {130, 80}, { 80, 70}, { 80, 60} }, // { 2, 14, 15 } + { {130, 80}, { 80, 60}, {100, 50} } // { 2, 15, 1 } + }; + const size_t numRefTriangles = sizeof(refTriangles) + / (6 * sizeof(refTriangles[0][0][0])); + SkTDArray<SkPoint> triangles; + bool success = SkConcaveToTriangles(kNumStarHoleVertices, star, &triangles); + PrintTriangles(triangles, kNumStarHoleVertices, star, reporter); + success = CompareTriangleList(numRefTriangles, refTriangles, triangles) + && success; + reporter->report("Triangulate Star With Hole", success ? reporter->kPassed + : reporter->kFailed); +} + + +// Plus test +static void TestPlusTriangulation(skiatest::Reporter* reporter) { + static const float refTriangles[][3][2] = { + { { 50, 10}, { 70, 10}, { 50, 50} }, // { 11, 0, 10 } + { { 70, 50}, {110, 50}, { 10, 70} }, // { 1, 2, 8 } + { { 70, 50}, { 10, 70}, { 10, 50} }, // { 1, 8, 9 } + { { 70, 50}, { 10, 50}, { 50, 50} }, // { 1, 9, 10 } + { { 70, 50}, { 50, 50}, { 70, 10} }, // { 1, 10, 0 } + { { 70, 70}, { 50, 110}, { 50, 70} }, // { 4, 6, 7 } + { {110, 70}, { 70, 70}, { 50, 70} }, // { 3, 4, 7 } + { {110, 70}, { 50, 70}, { 10, 70} }, // { 3, 7, 8 } + { {110, 70}, { 10, 70}, {110, 50} }, // { 3, 8, 2 } + { { 70, 110}, { 50, 110}, { 70, 70} }, // { 5, 6, 4 } + }; + const size_t numRefTriangles = sizeof(refTriangles) + / (6 * sizeof(refTriangles[0][0][0])); + SkTDArray<SkPoint> triangles; + const size_t numVertices = sizeof(plus) / sizeof(SkPoint); + bool success = SkConcaveToTriangles(numVertices, plus, &triangles); + PrintTriangles(triangles, numVertices, plus, reporter); + success = CompareTriangleList(numRefTriangles, refTriangles, triangles) + && success; + reporter->report("Triangulate Plus", success ? reporter->kPassed + : reporter->kFailed); +} + + +// Zipper test +static void TestZipperTriangulation(skiatest::Reporter* reporter) { + static const float refTriangles[][3][2] = { + { { 10, 10}, { 20, 10}, { 20, 50} }, // { 1, 2, 3 } + { { 20, 50}, { 30, 50}, { 10, 60} }, // { 3, 4, 0 } + { { 10, 10}, { 20, 50}, { 10, 60} }, // { 1, 3, 0 } + { { 30, 10}, { 60, 10}, { 40, 20} }, // { 5, 6, 26 } + { { 30, 10}, { 40, 20}, { 30, 50} }, // { 5, 26, 4 } + { { 40, 60}, { 10, 60}, { 30, 50} }, // { 27, 0, 4 } + { { 40, 60}, { 30, 50}, { 40, 20} }, // { 27, 4, 26 } + { { 60, 50}, { 70, 50}, { 50, 60} }, // { 7, 8, 24 } + { { 50, 20}, { 60, 50}, { 50, 60} }, // { 25, 7, 24 } + { { 50, 20}, { 40, 20}, { 60, 10} }, // { 25, 26, 6 } + { { 60, 50}, { 50, 20}, { 60, 10} }, // { 7, 25, 6 } + { { 70, 10}, {100, 10}, { 80, 20} }, // { 9, 10, 22 } + { { 70, 10}, { 80, 20}, { 70, 50} }, // { 9, 22, 8 } + { { 80, 60}, { 50, 60}, { 70, 50} }, // { 23, 24, 8 } + { { 80, 60}, { 70, 50}, { 80, 20} }, // { 23, 8, 22 } + { {100, 50}, {110, 50}, { 90, 60} }, // { 11, 12, 20 } + { { 90, 20}, {100, 50}, { 90, 60} }, // { 21, 11, 20 } + { { 90, 20}, { 80, 20}, {100, 10} }, // { 21, 22, 10 } + { {100, 50}, { 90, 20}, {100, 10} }, // { 11, 21, 10 } + { {110, 10}, {140, 10}, {120, 20} }, // { 13, 14, 18 } + { {110, 10}, {120, 20}, {110, 50} }, // { 13, 18, 12 } + { {120, 60}, { 90, 60}, {110, 50} }, // { 19, 20, 12 } + { {120, 60}, {110, 50}, {120, 20} }, // { 19, 12, 18 } + { {140, 60}, {130, 60}, {130, 20} }, // { 15, 16, 17 } + { {130, 20}, {120, 20}, {140, 10} }, // { 17, 18, 14 } + { {140, 60}, {130, 20}, {140, 10} }, // { 15, 17, 14 } + }; + const size_t numRefTriangles = sizeof(refTriangles) + / (6 * sizeof(refTriangles[0][0][0])); + SkTDArray<SkPoint> triangles; + const size_t numVertices = sizeof(zipper) / sizeof(SkPoint); + bool success = SkConcaveToTriangles(numVertices, zipper, &triangles); + PrintTriangles(triangles, numVertices, zipper, reporter); + success = CompareTriangleList(numRefTriangles, refTriangles, triangles) + && success; + reporter->report("Triangulate Zipper", success ? reporter->kPassed + : reporter->kFailed); +} + + +static void TestTriangulation(skiatest::Reporter* reporter) { + TestStarTriangulation(reporter); + TestStarHoleTriangulation(reporter); + TestPlusTriangulation(reporter); + TestZipperTriangulation(reporter); +} + +#include "TestClassDef.h" +DEFINE_TESTCLASS("Triangulation", TriangulationTestClass, TestTriangulation) |