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/*
* 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);
}
}
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