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 
17 package com.android.incallui.widget.multiwaveview;
18 
19 import android.animation.TimeInterpolator;
20 
21 class 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