Interpolator.cpp revision e45b1fd03b524d2b57cc6c222d89076a31a08bea 
1/*
2 * Copyright (C) 2014 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#include "Interpolator.h"
17
18#include <math.h>
19
20namespace android {
21namespace uirenderer {
22
23Interpolator* Interpolator::createDefaultInterpolator() {
24    return new AccelerateDecelerateInterpolator();
25}
26
27float AccelerateDecelerateInterpolator::interpolate(float input) {
28    return (float)(cosf((input + 1) * M_PI) / 2.0f) + 0.5f;
29}
30
31} /* namespace uirenderer */
32} /* namespace android */
33