Here you can find the source of lerp(double from, double to, double progress)
public static double lerp(double from, double to, double progress)
//package com.java2s; /*================================================================================================== RoboLib - An Expansion and Improvement Library for WPILibJ Copyright (C) 2015 Matthew Crocco//from ww w.ja v a2 s.c om This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA =================================================================================================*/ public class Main { /** * Linearly Interpolate between 'from' and 'to' at 'progress' * position. */ public static double lerp(double from, double to, double progress) { return from + ((to - from) * progress); } }