Ease.java revision b505074e8273887fbcd1e933738a42e770085fb8 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.widget.multiwaveview;
18
19import android.animation.TimeInterpolator;
20
21class Ease {
22    private static final float DOMAIN = 1.0f;
23    private static final float DURATION = 1.0f;
24    private static final float START = 0.0f;
25
26    static class Linear {
27        public static final TimeInterpolator easeNone = new TimeInterpolator() {
28            public float getInterpolation(float input) {
29                return input;
30            }
31        };
32    }
33
34    static class Cubic {
35        public static final TimeInterpolator easeIn = new TimeInterpolator() {
36            public float getInterpolation(float input) {
37                return DOMAIN*(input/=DURATION)*input*input + START;
38            }
39        };
40        public static final TimeInterpolator easeOut = new TimeInterpolator() {
41            public float getInterpolation(float input) {
42                return DOMAIN*((input=input/DURATION-1)*input*input + 1) + START;
43            }
44        };
45        public static final TimeInterpolator easeInOut = new TimeInterpolator() {
46            public float getInterpolation(float input) {
47                return ((input/=DURATION/2) < 1.0f) ?
48                        (DOMAIN/2*input*input*input + START)
49                            : (DOMAIN/2*((input-=2)*input*input + 2) + START);
50            }
51        };
52    }
53
54    static class Quad {
55        public static final TimeInterpolator easeIn = new TimeInterpolator() {
56            public float getInterpolation (float input) {
57                return DOMAIN*(input/=DURATION)*input + START;
58            }
59        };
60        public static final TimeInterpolator easeOut = new TimeInterpolator() {
61            public float getInterpolation(float input) {
62                return -DOMAIN *(input/=DURATION)*(input-2) + START;
63            }
64        };
65        public static final TimeInterpolator easeInOut = new TimeInterpolator() {
66            public float getInterpolation(float input) {
67                return ((input/=DURATION/2) < 1) ?
68                        (DOMAIN/2*input*input + START)
69                            : (-DOMAIN/2 * ((--input)*(input-2) - 1) + START);
70            }
71        };
72    }
73
74    static class Quart {
75        public static final TimeInterpolator easeIn = new TimeInterpolator() {
76            public float getInterpolation(float input) {
77                return DOMAIN*(input/=DURATION)*input*input*input + START;
78            }
79        };
80        public static final TimeInterpolator easeOut = new TimeInterpolator() {
81            public float getInterpolation(float input) {
82                return -DOMAIN * ((input=input/DURATION-1)*input*input*input - 1) + START;
83            }
84        };
85        public static final TimeInterpolator easeInOut = new TimeInterpolator() {
86            public float getInterpolation(float input) {
87                return ((input/=DURATION/2) < 1) ?
88                        (DOMAIN/2*input*input*input*input + START)
89                            : (-DOMAIN/2 * ((input-=2)*input*input*input - 2) + START);
90            }
91        };
92    }
93
94    static class Quint {
95        public static final TimeInterpolator easeIn = new TimeInterpolator() {
96            public float getInterpolation(float input) {
97                return DOMAIN*(input/=DURATION)*input*input*input*input + START;
98            }
99        };
100        public static final TimeInterpolator easeOut = new TimeInterpolator() {
101            public float getInterpolation(float input) {
102                return DOMAIN*((input=input/DURATION-1)*input*input*input*input + 1) + START;
103            }
104        };
105        public static final TimeInterpolator easeInOut = new TimeInterpolator() {
106            public float getInterpolation(float input) {
107                return ((input/=DURATION/2) < 1) ?
108                        (DOMAIN/2*input*input*input*input*input + START)
109                            : (DOMAIN/2*((input-=2)*input*input*input*input + 2) + START);
110            }
111        };
112    }
113
114    static class Sine {
115        public static final TimeInterpolator easeIn = new TimeInterpolator() {
116            public float getInterpolation(float input) {
117                return -DOMAIN * (float) Math.cos(input/DURATION * (Math.PI/2)) + DOMAIN + START;
118            }
119        };
120        public static final TimeInterpolator easeOut = new TimeInterpolator() {
121            public float getInterpolation(float input) {
122                return DOMAIN * (float) Math.sin(input/DURATION * (Math.PI/2)) + START;
123            }
124        };
125        public static final TimeInterpolator easeInOut = new TimeInterpolator() {
126            public float getInterpolation(float input) {
127                return -DOMAIN/2 * ((float)Math.cos(Math.PI*input/DURATION) - 1.0f) + START;
128            }
129        };
130    }
131
132}
133