#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)