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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.camera.ui.motion;
/**
* Predefined material curves and animations.
*/
public class UnitCurves {
public static final UnitCurve FAST_OUT_SLOW_IN = new UnitBezier(0.4f, 0.0f, 0.2f, 1.0f);
public static final UnitCurve LINEAR_OUT_SLOW_IN = new UnitBezier(0.0f, 0.0f, 0.2f, 1.0f);
public static final UnitCurve FAST_OUT_LINEAR_IN = new UnitBezier(0.4f, 0.0f, 1.0f, 1.0f);
public static final UnitCurve LINEAR = new UnitBezier(0.0f, 0.0f, 1.0f, 1.0f);
/**
* Given two curves (from and to) and a time along the from curve, compute
* the time at t, and find a t along the 'toCurve' that will produce the
* same output. This is useful when interpolating between two different curves
* when the animation is not at the beginning or end.
*
* @param enterCurve the curve to compute the value from
* @param exitCurve the curve to find a time t on that matches output of
* enterCurve at T.
* @param t the time at which to compute the value (0..1)
* @return the time along the exitCurve.
*/
public static float mapEnterCurveToExitCurveAtT(UnitCurve enterCurve, UnitCurve exitCurve,
float t) {
return exitCurve.tAt(1 - enterCurve.valueAt(t));
}
}
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