/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.systemui.statusbar.phone;
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import android.view.animation.Interpolator;
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/**
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* An implementation of a bouncer interpolator optimized for unlock hinting.
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*/
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public class BounceInterpolator implements Interpolator {
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private final static float SCALE_FACTOR = 7.5625f;
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@Override
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public float getInterpolation(float t) {
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t *= 11f / 10f;
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if (t < 4f / 11f) {
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return SCALE_FACTOR * t * t;
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} else if (t < 8f / 11f) {
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float t2 = t - 6f / 11f;
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return SCALE_FACTOR * t2 * t2 + 3f / 4f;
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} else if (t < 10f / 11f) {
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float t2 = t - 9f / 11f;
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return SCALE_FACTOR * t2 * t2 + 15f / 16f;
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} else {
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return 1;
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}
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}
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}
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