diff options
author | robertphillips <robertphillips@google.com> | 2015-07-13 13:16:44 -0700 |
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committer | Commit bot <commit-bot@chromium.org> | 2015-07-13 13:16:44 -0700 |
commit | 3d32d768cd8b66c49c070495c08f7933b9dd2423 (patch) | |
tree | 6676e917988dcecc00b5f33f5e33a4e7c2849344 /tests/Point3Test.cpp | |
parent | 52e7657cd850f95e66eb23c6d138ee45149a1039 (diff) |
Add new SkPoint3 class
The existing Light filter and the upcoming Lighting Shader both need a Point3 class
Review URL: https://codereview.chromium.org/1229693009
Diffstat (limited to 'tests/Point3Test.cpp')
-rw-r--r-- | tests/Point3Test.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/tests/Point3Test.cpp b/tests/Point3Test.cpp new file mode 100644 index 0000000000..bf3b90270c --- /dev/null +++ b/tests/Point3Test.cpp @@ -0,0 +1,130 @@ +/* + * 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 "SkPoint3.h" +#include "Test.h" + +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); + } +} + +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 < SK_ARRAY_COUNT(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); + } +} |