robertphillips | 3d32d76 | 2015-07-13 13:16:44 -0700 | [diff] [blame] | 1 | /* |
| 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 | |
| 8 | // Unit tests for src/core/SkPoint3.cpp and its header |
| 9 | |
| 10 | #include "SkPoint3.h" |
| 11 | #include "Test.h" |
| 12 | |
| 13 | static void test_eq_ops(skiatest::Reporter* reporter) { |
| 14 | const SkPoint3 p0 = SkPoint3::Make(0, 0, 0); |
| 15 | const SkPoint3 p1 = SkPoint3::Make(1, 1, 1); |
| 16 | const SkPoint3 p2 = SkPoint3::Make(1, 1, 1); |
| 17 | |
| 18 | REPORTER_ASSERT(reporter, p0 != p1); |
| 19 | REPORTER_ASSERT(reporter, p1 == p2); |
| 20 | } |
| 21 | |
| 22 | static void test_ops(skiatest::Reporter* reporter) { |
| 23 | SkPoint3 v = SkPoint3::Make(1, 1, 1); |
| 24 | v.normalize(); |
| 25 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(v.length(), SK_Scalar1)); |
| 26 | |
| 27 | // scale |
| 28 | SkPoint3 p = v.makeScale(3.0f); |
| 29 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.length(), 3.0f)); |
| 30 | |
| 31 | p.scale(1.0f/3.0f); |
| 32 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.length(), SK_Scalar1)); |
| 33 | |
| 34 | SkPoint3 p1 = SkPoint3::Make(20.0f, 2.0f, 10.0f); |
| 35 | SkPoint3 p2 = -p1; |
| 36 | |
| 37 | // - |
| 38 | p = p1 - p1; |
| 39 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.x(), 0.0f)); |
| 40 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.y(), 0.0f)); |
| 41 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.z(), 0.0f)); |
| 42 | |
| 43 | // + |
| 44 | p = p1 + p2; |
| 45 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.x(), 0.0f)); |
| 46 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.y(), 0.0f)); |
| 47 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(p.z(), 0.0f)); |
| 48 | } |
| 49 | |
| 50 | static void test_dot(skiatest::Reporter* reporter) { |
| 51 | const SkPoint3 xAxis = SkPoint3::Make(1.0f, 0.0f, 0.0f); |
| 52 | const SkPoint3 yAxis = SkPoint3::Make(0.0f, 1.0f, 0.0f); |
| 53 | const SkPoint3 zAxis = SkPoint3::Make(0.0f, 0.0f, 1.0f); |
| 54 | |
| 55 | SkScalar dot = xAxis.dot(yAxis); |
| 56 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| 57 | |
| 58 | dot = yAxis.dot(zAxis); |
| 59 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| 60 | |
| 61 | dot = zAxis.dot(xAxis); |
| 62 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 0.0f)); |
| 63 | |
| 64 | SkPoint3 v = SkPoint3::Make(13.0f, 2.0f, 7.0f); |
| 65 | v.normalize(); |
| 66 | |
| 67 | dot = v.dot(v); |
| 68 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, 1.0f)); |
| 69 | |
| 70 | v = SkPoint3::Make(SK_ScalarRoot2Over2, SK_ScalarRoot2Over2, 0.0f); |
| 71 | |
| 72 | dot = xAxis.dot(v); |
| 73 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, SK_ScalarRoot2Over2)); |
| 74 | |
| 75 | dot = yAxis.dot(v); |
| 76 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(dot, SK_ScalarRoot2Over2)); |
| 77 | } |
| 78 | |
| 79 | static void test_length(skiatest::Reporter* reporter, |
| 80 | SkScalar x, SkScalar y, SkScalar z, SkScalar expectedLen) { |
| 81 | SkPoint3 point = SkPoint3::Make(x, y, z); |
| 82 | |
| 83 | SkScalar s1 = point.length(); |
| 84 | SkScalar s2 = SkPoint3::Length(x, y, z); |
| 85 | |
| 86 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, s2)); |
| 87 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, expectedLen)); |
| 88 | } |
| 89 | |
| 90 | static void test_normalize(skiatest::Reporter* reporter, |
| 91 | SkScalar x, SkScalar y, SkScalar z, SkScalar expectedLen) { |
| 92 | SkPoint3 point = SkPoint3::Make(x, y, z); |
| 93 | |
| 94 | bool result = point.normalize(); |
| 95 | SkScalar newLength = point.length(); |
| 96 | |
| 97 | if (0 == expectedLen) { |
| 98 | const SkPoint3 empty = SkPoint3::Make(0.0f, 0.0f, 0.0f); |
| 99 | |
| 100 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, 0)); |
| 101 | REPORTER_ASSERT(reporter, !result); |
| 102 | REPORTER_ASSERT(reporter, point == empty); |
| 103 | } else { |
| 104 | REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, SK_Scalar1)); |
| 105 | REPORTER_ASSERT(reporter, result); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | DEF_TEST(Point3, reporter) { |
| 110 | test_eq_ops(reporter); |
| 111 | test_ops(reporter); |
| 112 | test_dot(reporter); |
| 113 | |
| 114 | static const struct { |
| 115 | SkScalar fX; |
| 116 | SkScalar fY; |
| 117 | SkScalar fZ; |
| 118 | SkScalar fLength; |
| 119 | } gRec[] = { |
| 120 | { 0.0f, 0.0f, 0.0f, 0.0f }, |
| 121 | { 0.3f, 0.4f, 0.5f, SK_ScalarRoot2Over2 }, |
| 122 | { 1.0e-37f, 1.0e-37f, 1.0e-37f, 0.0f }, // underflows |
| 123 | { 3.4e38f, 0.0f, 0.0f, 3.4e38f } // overflows |
| 124 | }; |
| 125 | |
| 126 | for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) { |
| 127 | test_length(reporter, gRec[i].fX, gRec[i].fY, gRec[i].fZ, gRec[i].fLength); |
| 128 | test_normalize(reporter, gRec[i].fX, gRec[i].fY, gRec[i].fZ, gRec[i].fLength); |
| 129 | } |
| 130 | } |