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/*
* Copyright 2014 Phil Burk, Mobileer Inc
*
* 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.jsyn.unitgen;
/**
* Used inside UnitGenerators for fast smoothing of inputs.
*
* @author Phil Burk (C) 2014 Mobileer Inc
*/
public class Unzipper {
private double target;
private double delta;
private double current;
private int counter;
// About 30 msec. Power of 2 so divide should be faster.
private static final int NUM_STEPS = 1024;
public double smooth(double input) {
if (input != target) {
target = input;
delta = (target - current) / NUM_STEPS;
counter = NUM_STEPS;
}
if (counter > 0) {
if (--counter == 0) {
current = target;
} else {
current += delta;
}
}
return current;
}
}
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