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Issue 143413020: Use a bezier timing function for the overview mode animation (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 10 months ago
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1 // Copyright 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "cc/animation/timing_function.h"
6
7 #include "testing/gtest/include/gtest/gtest.h"
8
9 namespace cc {
10 namespace {
11
12 TEST(TimingFunctionTest, CubicBezierTimingFunction) {
13 scoped_ptr<CubicBezierTimingFunction> function =
14 CubicBezierTimingFunction::Create(0.25, 0.0, 0.75, 1.0);
15
16 double epsilon = 0.00015;
17
18 EXPECT_NEAR(function->GetValue(0), 0, epsilon);
19 EXPECT_NEAR(function->GetValue(0.05), 0.01136, epsilon);
20 EXPECT_NEAR(function->GetValue(0.1), 0.03978, epsilon);
21 EXPECT_NEAR(function->GetValue(0.15), 0.079780, epsilon);
22 EXPECT_NEAR(function->GetValue(0.2), 0.12803, epsilon);
23 EXPECT_NEAR(function->GetValue(0.25), 0.18235, epsilon);
24 EXPECT_NEAR(function->GetValue(0.3), 0.24115, epsilon);
25 EXPECT_NEAR(function->GetValue(0.35), 0.30323, epsilon);
26 EXPECT_NEAR(function->GetValue(0.4), 0.36761, epsilon);
27 EXPECT_NEAR(function->GetValue(0.45), 0.43345, epsilon);
28 EXPECT_NEAR(function->GetValue(0.5), 0.5, epsilon);
29 EXPECT_NEAR(function->GetValue(0.6), 0.63238, epsilon);
30 EXPECT_NEAR(function->GetValue(0.65), 0.69676, epsilon);
31 EXPECT_NEAR(function->GetValue(0.7), 0.75884, epsilon);
32 EXPECT_NEAR(function->GetValue(0.75), 0.81764, epsilon);
33 EXPECT_NEAR(function->GetValue(0.8), 0.87196, epsilon);
34 EXPECT_NEAR(function->GetValue(0.85), 0.92021, epsilon);
35 EXPECT_NEAR(function->GetValue(0.9), 0.96021, epsilon);
36 EXPECT_NEAR(function->GetValue(0.95), 0.98863, epsilon);
37 EXPECT_NEAR(function->GetValue(1), 1, epsilon);
38 }
39
40 // Tests that the bezier timing function works with knots with y not in (0, 1).
41 TEST(TimingFunctionTest, CubicBezierTimingFunctionUnclampedYValues) {
42 scoped_ptr<CubicBezierTimingFunction> function =
43 CubicBezierTimingFunction::Create(0.5, -1.0, 0.5, 2.0);
44
45 double epsilon = 0.00015;
46
47 EXPECT_NEAR(function->GetValue(0.0), 0.0, epsilon);
48 EXPECT_NEAR(function->GetValue(0.05), -0.08954, epsilon);
49 EXPECT_NEAR(function->GetValue(0.1), -0.15613, epsilon);
50 EXPECT_NEAR(function->GetValue(0.15), -0.19641, epsilon);
51 EXPECT_NEAR(function->GetValue(0.2), -0.20651, epsilon);
52 EXPECT_NEAR(function->GetValue(0.25), -0.18232, epsilon);
53 EXPECT_NEAR(function->GetValue(0.3), -0.11992, epsilon);
54 EXPECT_NEAR(function->GetValue(0.35), -0.01672, epsilon);
55 EXPECT_NEAR(function->GetValue(0.4), 0.12660, epsilon);
56 EXPECT_NEAR(function->GetValue(0.45), 0.30349, epsilon);
57 EXPECT_NEAR(function->GetValue(0.5), 0.50000, epsilon);
58 EXPECT_NEAR(function->GetValue(0.55), 0.69651, epsilon);
59 EXPECT_NEAR(function->GetValue(0.6), 0.87340, epsilon);
60 EXPECT_NEAR(function->GetValue(0.65), 1.01672, epsilon);
61 EXPECT_NEAR(function->GetValue(0.7), 1.11992, epsilon);
62 EXPECT_NEAR(function->GetValue(0.75), 1.18232, epsilon);
63 EXPECT_NEAR(function->GetValue(0.8), 1.20651, epsilon);
64 EXPECT_NEAR(function->GetValue(0.85), 1.19641, epsilon);
65 EXPECT_NEAR(function->GetValue(0.9), 1.15613, epsilon);
66 EXPECT_NEAR(function->GetValue(0.95), 1.08954, epsilon);
67 EXPECT_NEAR(function->GetValue(1.0), 1.0, epsilon);
68 }
69
70 TEST(TimingFunctionTest, CubicBezierTimingFunctionRange) {
71 double epsilon = 0.00015;
72 float min, max;
73
74 // Derivative is a constant.
75 scoped_ptr<CubicBezierTimingFunction> function =
76 CubicBezierTimingFunction::Create(0.25, (1.0 / 3.0), 0.75, (2.0 / 3.0));
77 function->Range(&min, &max);
78 EXPECT_EQ(0.f, min);
79 EXPECT_EQ(1.f, max);
80
81 // Derivative is linear.
82 function = CubicBezierTimingFunction::Create(0.25, -0.5, 0.75, (-1.0 / 6.0));
83 function->Range(&min, &max);
84 EXPECT_NEAR(min, -0.225, epsilon);
85 EXPECT_EQ(1.f, max);
86
87 // Derivative has no real roots.
88 function = CubicBezierTimingFunction::Create(0.25, 0.25, 0.75, 0.5);
89 function->Range(&min, &max);
90 EXPECT_EQ(0.f, min);
91 EXPECT_EQ(1.f, max);
92
93 // Derivative has exactly one real root.
94 function = CubicBezierTimingFunction::Create(0.0, 1.0, 1.0, 0.0);
95 function->Range(&min, &max);
96 EXPECT_EQ(0.f, min);
97 EXPECT_EQ(1.f, max);
98
99 // Derivative has one root < 0 and one root > 1.
100 function = CubicBezierTimingFunction::Create(0.25, 0.1, 0.75, 0.9);
101 function->Range(&min, &max);
102 EXPECT_EQ(0.f, min);
103 EXPECT_EQ(1.f, max);
104
105 // Derivative has two roots in [0,1].
106 function = CubicBezierTimingFunction::Create(0.25, 2.5, 0.75, 0.5);
107 function->Range(&min, &max);
108 EXPECT_EQ(0.f, min);
109 EXPECT_NEAR(max, 1.28818, epsilon);
110 function = CubicBezierTimingFunction::Create(0.25, 0.5, 0.75, -1.5);
111 function->Range(&min, &max);
112 EXPECT_NEAR(min, -0.28818, epsilon);
113 EXPECT_EQ(1.f, max);
114
115 // Derivative has one root < 0 and one root in [0,1].
116 function = CubicBezierTimingFunction::Create(0.25, 0.1, 0.75, 1.5);
117 function->Range(&min, &max);
118 EXPECT_EQ(0.f, min);
119 EXPECT_NEAR(max, 1.10755, epsilon);
120
121 // Derivative has one root in [0,1] and one root > 1.
122 function = CubicBezierTimingFunction::Create(0.25, -0.5, 0.75, 0.9);
123 function->Range(&min, &max);
124 EXPECT_NEAR(min, -0.10755, epsilon);
125 EXPECT_EQ(1.f, max);
126
127 // Derivative has two roots < 0.
128 function = CubicBezierTimingFunction::Create(0.25, 0.3, 0.75, 0.633);
129 function->Range(&min, &max);
130 EXPECT_EQ(0.f, min);
131 EXPECT_EQ(1.f, max);
132
133 // Derivative has two roots > 1.
134 function = CubicBezierTimingFunction::Create(0.25, 0.367, 0.75, 0.7);
135 function->Range(&min, &max);
136 EXPECT_EQ(0.f, min);
137 EXPECT_EQ(1.f, max);
138 }
139
140 } // namespace
141 } // namespace cc
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