| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| // Unit tests for src/core/SkPoint3.cpp and its header |
| |
| #include "include/core/SkPoint3.h" |
| #include "include/core/SkScalar.h" |
| #include "src/base/SkRandom.h" |
| #include "tests/Test.h" |
| |
| #include <array> |
| #include <cstddef> |
| |
| static void test_eq_ops(skiatest::Reporter* reporter) { |
| const SkPoint3 p0 = SkPoint3::Make(0, 0, 0); |
| const SkPoint3 p1 = SkPoint3::Make(1, 1, 1); |
| const SkPoint3 p2 = SkPoint3::Make(1, 1, 1); |
| |
| REPORTER_ASSERT(reporter, p0 != p1); |
| REPORTER_ASSERT(reporter, p1 == p2); |
| } |
| |
| static void test_ops(skiatest::Reporter* reporter) { |
| SkPoint3 v = SkPoint3::Make(1, 1, 1); |
| v.normalize(); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(v.length(), SK_Scalar1)); |
| |
| // scale |
| SkPoint3 p = v.makeScale(3.0f); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.length(), 3.0f)); |
| |
| p.scale(1.0f/3.0f); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.length(), SK_Scalar1)); |
| |
| SkPoint3 p1 = SkPoint3::Make(20.0f, 2.0f, 10.0f); |
| SkPoint3 p2 = -p1; |
| |
| // - |
| p = p1 - p1; |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.x(), 0.0f)); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.y(), 0.0f)); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.z(), 0.0f)); |
| |
| // + |
| p = p1 + p2; |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.x(), 0.0f)); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.y(), 0.0f)); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.z(), 0.0f)); |
| } |
| |
| static void test_dot(skiatest::Reporter* reporter) { |
| const SkPoint3 xAxis = SkPoint3::Make(1.0f, 0.0f, 0.0f); |
| const SkPoint3 yAxis = SkPoint3::Make(0.0f, 1.0f, 0.0f); |
| const SkPoint3 zAxis = SkPoint3::Make(0.0f, 0.0f, 1.0f); |
| |
| SkScalar dot = xAxis.dot(yAxis); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| |
| dot = yAxis.dot(zAxis); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| |
| dot = zAxis.dot(xAxis); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| |
| SkPoint3 v = SkPoint3::Make(13.0f, 2.0f, 7.0f); |
| v.normalize(); |
| |
| dot = v.dot(v); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 1.0f)); |
| |
| v = SkPoint3::Make(SK_ScalarRoot2Over2, SK_ScalarRoot2Over2, 0.0f); |
| |
| dot = xAxis.dot(v); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, SK_ScalarRoot2Over2)); |
| |
| dot = yAxis.dot(v); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, SK_ScalarRoot2Over2)); |
| } |
| |
| static void test_length(skiatest::Reporter* reporter, |
| SkScalar x, SkScalar y, SkScalar z, SkScalar expectedLen) { |
| SkPoint3 point = SkPoint3::Make(x, y, z); |
| |
| SkScalar s1 = point.length(); |
| SkScalar s2 = SkPoint3::Length(x, y, z); |
| |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, s2)); |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, expectedLen)); |
| } |
| |
| static void test_normalize(skiatest::Reporter* reporter, |
| SkScalar x, SkScalar y, SkScalar z, SkScalar expectedLen) { |
| SkPoint3 point = SkPoint3::Make(x, y, z); |
| |
| bool result = point.normalize(); |
| SkScalar newLength = point.length(); |
| |
| if (0 == expectedLen) { |
| const SkPoint3 empty = SkPoint3::Make(0.0f, 0.0f, 0.0f); |
| |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, 0)); |
| REPORTER_ASSERT(reporter, !result); |
| REPORTER_ASSERT(reporter, point == empty); |
| } else { |
| REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, SK_Scalar1)); |
| REPORTER_ASSERT(reporter, result); |
| } |
| SkRandom random; |
| random.setSeed(1234); |
| SkPoint3 pt3; |
| int testCount = 100000; |
| for (int index = 0; index < testCount; ++index) { |
| SkScalar testVal; |
| do { |
| testVal = random.nextRangeF(0, 2); |
| } while (!testVal); |
| pt3.set(testVal, 0, 0); |
| REPORTER_ASSERT(reporter, !pt3.normalize() || 1 == pt3.fX); |
| } |
| } |
| |
| DEF_TEST(Point3, reporter) { |
| test_eq_ops(reporter); |
| test_ops(reporter); |
| test_dot(reporter); |
| |
| static const struct { |
| SkScalar fX; |
| SkScalar fY; |
| SkScalar fZ; |
| SkScalar fLength; |
| } gRec[] = { |
| { 0.0f, 0.0f, 0.0f, 0.0f }, |
| { 0.3f, 0.4f, 0.5f, SK_ScalarRoot2Over2 }, |
| { 1.0e-37f, 1.0e-37f, 1.0e-37f, 0.0f }, // underflows |
| { 3.4e38f, 0.0f, 0.0f, 3.4e38f } // overflows |
| }; |
| |
| for (size_t i = 0; i < std::size(gRec); ++i) { |
| test_length(reporter, gRec[i].fX, gRec[i].fY, gRec[i].fZ, gRec[i].fLength); |
| test_normalize(reporter, gRec[i].fX, gRec[i].fY, gRec[i].fZ, gRec[i].fLength); |
| } |
| } |