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362 lines
12 KiB
362 lines
12 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <stddef.h>
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#include "base/macros.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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#include "ui/gfx/geometry/quad_f.h"
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#include "ui/gfx/geometry/rect_f.h"
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namespace gfx {
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TEST(QuadTest, Construction) {
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// Verify constructors.
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PointF a(1, 1);
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PointF b(2, 1);
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PointF c(2, 2);
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PointF d(1, 2);
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PointF e;
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QuadF q1;
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QuadF q2(e, e, e, e);
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QuadF q3(a, b, c, d);
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QuadF q4(BoundingRect(a, c));
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EXPECT_EQ(q1, q2);
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EXPECT_EQ(q3, q4);
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// Verify getters.
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EXPECT_EQ(q3.p1(), a);
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EXPECT_EQ(q3.p2(), b);
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EXPECT_EQ(q3.p3(), c);
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EXPECT_EQ(q3.p4(), d);
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// Verify setters.
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q3.set_p1(b);
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q3.set_p2(c);
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q3.set_p3(d);
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q3.set_p4(a);
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EXPECT_EQ(q3.p1(), b);
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EXPECT_EQ(q3.p2(), c);
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EXPECT_EQ(q3.p3(), d);
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EXPECT_EQ(q3.p4(), a);
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// Verify operator=(Rect)
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EXPECT_NE(q1, q4);
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q1 = BoundingRect(a, c);
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EXPECT_EQ(q1, q4);
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// Verify operator=(Quad)
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EXPECT_NE(q1, q3);
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q1 = q3;
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EXPECT_EQ(q1, q3);
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}
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TEST(QuadTest, AddingVectors) {
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PointF a(1, 1);
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PointF b(2, 1);
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PointF c(2, 2);
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PointF d(1, 2);
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Vector2dF v(3.5f, -2.5f);
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QuadF q1(a, b, c, d);
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QuadF added = q1 + v;
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q1 += v;
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QuadF expected1(PointF(4.5f, -1.5f),
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PointF(5.5f, -1.5f),
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PointF(5.5f, -0.5f),
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PointF(4.5f, -0.5f));
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EXPECT_EQ(expected1, added);
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EXPECT_EQ(expected1, q1);
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QuadF q2(a, b, c, d);
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QuadF subtracted = q2 - v;
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q2 -= v;
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QuadF expected2(PointF(-2.5f, 3.5f),
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PointF(-1.5f, 3.5f),
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PointF(-1.5f, 4.5f),
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PointF(-2.5f, 4.5f));
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EXPECT_EQ(expected2, subtracted);
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EXPECT_EQ(expected2, q2);
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QuadF q3(a, b, c, d);
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q3 += v;
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q3 -= v;
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EXPECT_EQ(QuadF(a, b, c, d), q3);
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EXPECT_EQ(q3, (q3 + v - v));
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}
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TEST(QuadTest, IsRectilinear) {
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PointF a(1, 1);
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PointF b(2, 1);
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PointF c(2, 2);
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PointF d(1, 2);
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Vector2dF v(3.5f, -2.5f);
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EXPECT_TRUE(QuadF().IsRectilinear());
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EXPECT_TRUE(QuadF(a, b, c, d).IsRectilinear());
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EXPECT_TRUE((QuadF(a, b, c, d) + v).IsRectilinear());
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float epsilon = std::numeric_limits<float>::epsilon();
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PointF a2(1 + epsilon / 2, 1 + epsilon / 2);
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PointF b2(2 + epsilon / 2, 1 + epsilon / 2);
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PointF c2(2 + epsilon / 2, 2 + epsilon / 2);
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PointF d2(1 + epsilon / 2, 2 + epsilon / 2);
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EXPECT_TRUE(QuadF(a2, b, c, d).IsRectilinear());
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EXPECT_TRUE((QuadF(a2, b, c, d) + v).IsRectilinear());
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EXPECT_TRUE(QuadF(a, b2, c, d).IsRectilinear());
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EXPECT_TRUE((QuadF(a, b2, c, d) + v).IsRectilinear());
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EXPECT_TRUE(QuadF(a, b, c2, d).IsRectilinear());
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EXPECT_TRUE((QuadF(a, b, c2, d) + v).IsRectilinear());
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EXPECT_TRUE(QuadF(a, b, c, d2).IsRectilinear());
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EXPECT_TRUE((QuadF(a, b, c, d2) + v).IsRectilinear());
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struct {
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PointF a_off, b_off, c_off, d_off;
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} tests[] = {
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{
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PointF(1, 1.00001f),
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PointF(2, 1.00001f),
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PointF(2, 2.00001f),
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PointF(1, 2.00001f)
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},
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{
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PointF(1.00001f, 1),
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PointF(2.00001f, 1),
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PointF(2.00001f, 2),
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PointF(1.00001f, 2)
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},
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{
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PointF(1.00001f, 1.00001f),
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PointF(2.00001f, 1.00001f),
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PointF(2.00001f, 2.00001f),
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PointF(1.00001f, 2.00001f)
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},
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{
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PointF(1, 0.99999f),
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PointF(2, 0.99999f),
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PointF(2, 1.99999f),
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PointF(1, 1.99999f)
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},
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{
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PointF(0.99999f, 1),
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PointF(1.99999f, 1),
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PointF(1.99999f, 2),
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PointF(0.99999f, 2)
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},
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{
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PointF(0.99999f, 0.99999f),
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PointF(1.99999f, 0.99999f),
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PointF(1.99999f, 1.99999f),
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PointF(0.99999f, 1.99999f)
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}
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};
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for (size_t i = 0; i < arraysize(tests); ++i) {
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PointF a_off = tests[i].a_off;
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PointF b_off = tests[i].b_off;
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PointF c_off = tests[i].c_off;
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PointF d_off = tests[i].d_off;
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EXPECT_FALSE(QuadF(a_off, b, c, d).IsRectilinear());
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EXPECT_FALSE((QuadF(a_off, b, c, d) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a, b_off, c, d).IsRectilinear());
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EXPECT_FALSE((QuadF(a, b_off, c, d) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a, b, c_off, d).IsRectilinear());
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EXPECT_FALSE((QuadF(a, b, c_off, d) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a, b, c, d_off).IsRectilinear());
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EXPECT_FALSE((QuadF(a, b, c, d_off) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a_off, b, c_off, d).IsRectilinear());
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EXPECT_FALSE((QuadF(a_off, b, c_off, d) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a, b_off, c, d_off).IsRectilinear());
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EXPECT_FALSE((QuadF(a, b_off, c, d_off) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a, b_off, c_off, d_off).IsRectilinear());
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EXPECT_FALSE((QuadF(a, b_off, c_off, d_off) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a_off, b, c_off, d_off).IsRectilinear());
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EXPECT_FALSE((QuadF(a_off, b, c_off, d_off) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a_off, b_off, c, d_off).IsRectilinear());
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EXPECT_FALSE((QuadF(a_off, b_off, c, d_off) + v).IsRectilinear());
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EXPECT_FALSE(QuadF(a_off, b_off, c_off, d).IsRectilinear());
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EXPECT_FALSE((QuadF(a_off, b_off, c_off, d) + v).IsRectilinear());
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EXPECT_TRUE(QuadF(a_off, b_off, c_off, d_off).IsRectilinear());
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EXPECT_TRUE((QuadF(a_off, b_off, c_off, d_off) + v).IsRectilinear());
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}
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}
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TEST(QuadTest, IsCounterClockwise) {
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PointF a1(1, 1);
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PointF b1(2, 1);
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PointF c1(2, 2);
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PointF d1(1, 2);
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EXPECT_FALSE(QuadF(a1, b1, c1, d1).IsCounterClockwise());
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EXPECT_FALSE(QuadF(b1, c1, d1, a1).IsCounterClockwise());
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EXPECT_TRUE(QuadF(a1, d1, c1, b1).IsCounterClockwise());
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EXPECT_TRUE(QuadF(c1, b1, a1, d1).IsCounterClockwise());
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// Slightly more complicated quads should work just as easily.
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PointF a2(1.3f, 1.4f);
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PointF b2(-0.7f, 4.9f);
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PointF c2(1.8f, 6.2f);
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PointF d2(2.1f, 1.6f);
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EXPECT_TRUE(QuadF(a2, b2, c2, d2).IsCounterClockwise());
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EXPECT_TRUE(QuadF(b2, c2, d2, a2).IsCounterClockwise());
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EXPECT_FALSE(QuadF(a2, d2, c2, b2).IsCounterClockwise());
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EXPECT_FALSE(QuadF(c2, b2, a2, d2).IsCounterClockwise());
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// Quads with 3 collinear points should work correctly, too.
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PointF a3(0, 0);
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PointF b3(1, 0);
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PointF c3(2, 0);
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PointF d3(1, 1);
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EXPECT_FALSE(QuadF(a3, b3, c3, d3).IsCounterClockwise());
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EXPECT_FALSE(QuadF(b3, c3, d3, a3).IsCounterClockwise());
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EXPECT_TRUE(QuadF(a3, d3, c3, b3).IsCounterClockwise());
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// The next expectation in particular would fail for an implementation
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// that incorrectly uses only a cross product of the first 3 vertices.
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EXPECT_TRUE(QuadF(c3, b3, a3, d3).IsCounterClockwise());
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// Non-convex quads should work correctly, too.
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PointF a4(0, 0);
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PointF b4(1, 1);
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PointF c4(2, 0);
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PointF d4(1, 3);
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EXPECT_FALSE(QuadF(a4, b4, c4, d4).IsCounterClockwise());
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EXPECT_FALSE(QuadF(b4, c4, d4, a4).IsCounterClockwise());
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EXPECT_TRUE(QuadF(a4, d4, c4, b4).IsCounterClockwise());
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EXPECT_TRUE(QuadF(c4, b4, a4, d4).IsCounterClockwise());
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// A quad with huge coordinates should not fail this check due to
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// single-precision overflow.
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PointF a5(1e30f, 1e30f);
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PointF b5(1e35f, 1e30f);
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PointF c5(1e35f, 1e35f);
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PointF d5(1e30f, 1e35f);
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EXPECT_FALSE(QuadF(a5, b5, c5, d5).IsCounterClockwise());
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EXPECT_FALSE(QuadF(b5, c5, d5, a5).IsCounterClockwise());
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EXPECT_TRUE(QuadF(a5, d5, c5, b5).IsCounterClockwise());
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EXPECT_TRUE(QuadF(c5, b5, a5, d5).IsCounterClockwise());
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}
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TEST(QuadTest, BoundingBox) {
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RectF r(3.2f, 5.4f, 7.007f, 12.01f);
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EXPECT_EQ(r, QuadF(r).BoundingBox());
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PointF a(1.3f, 1.4f);
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PointF b(-0.7f, 4.9f);
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PointF c(1.8f, 6.2f);
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PointF d(2.1f, 1.6f);
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float left = -0.7f;
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float top = 1.4f;
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float right = 2.1f;
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float bottom = 6.2f;
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EXPECT_EQ(RectF(left, top, right - left, bottom - top),
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QuadF(a, b, c, d).BoundingBox());
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}
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TEST(QuadTest, ContainsPoint) {
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PointF a(1.3f, 1.4f);
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PointF b(-0.8f, 4.4f);
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PointF c(1.8f, 6.1f);
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PointF d(2.1f, 1.6f);
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Vector2dF epsilon_x(2 * std::numeric_limits<float>::epsilon(), 0);
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Vector2dF epsilon_y(0, 2 * std::numeric_limits<float>::epsilon());
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Vector2dF ac_center = c - a;
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ac_center.Scale(0.5f);
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Vector2dF bd_center = d - b;
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bd_center.Scale(0.5f);
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + ac_center));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + bd_center));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - ac_center));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - bd_center));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - ac_center));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - bd_center));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + ac_center));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + bd_center));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(a));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_y));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(a + epsilon_x));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + epsilon_y));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(b));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_y));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(b + epsilon_y));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(c));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(c - epsilon_x));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - epsilon_y));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_y));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(d));
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EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(d - epsilon_y));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_x));
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EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_y));
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// Test a simple square.
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PointF s1(-1, -1);
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PointF s2(1, -1);
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PointF s3(1, 1);
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PointF s4(-1, 1);
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// Top edge.
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, -1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, -1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, -1.0f)));
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// Bottom edge.
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, 1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 1.0f)));
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// Left edge.
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.1f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 0.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.1f)));
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// Right edge.
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.1f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 0.0f)));
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.1f)));
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// Centered inside.
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EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 0)));
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// Centered outside.
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 0)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 0)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, -1.1f)));
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EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 1.1f)));
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}
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TEST(QuadTest, Scale) {
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PointF a(1.3f, 1.4f);
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PointF b(-0.8f, 4.4f);
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PointF c(1.8f, 6.1f);
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PointF d(2.1f, 1.6f);
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QuadF q1(a, b, c, d);
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q1.Scale(1.5f);
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PointF a_scaled = ScalePoint(a, 1.5f);
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PointF b_scaled = ScalePoint(b, 1.5f);
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PointF c_scaled = ScalePoint(c, 1.5f);
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PointF d_scaled = ScalePoint(d, 1.5f);
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EXPECT_EQ(q1, QuadF(a_scaled, b_scaled, c_scaled, d_scaled));
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QuadF q2;
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q2.Scale(1.5f);
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EXPECT_EQ(q2, q2);
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}
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} // namespace gfx
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