/*
* __ .__ .__ ._____.
* _/ |_ _______ __|__| ____ | | |__\_ |__ ______
* \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/
* | | ( <_> > <| \ \___| |_| || \_\ \\___ \
* |__| \____/__/\_ \__|\___ >____/__||___ /____ >
* \/ \/ \/ \/
*
* Copyright (c) 2006-2011 Karsten Schmidt
*
* 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.
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*/
package spimedb.util.math;
/**
* Implementation of the cosine interpolation function:
*
* i = b+(a-b)*(0.5+0.5*cos(f*PI))
*/
public class CosineInterpolation implements InterpolateStrategy {
public double interpolate(double a, double b, double f) {
return b + (a - b) * (0.5 + 0.5 * Math.cos(f * Math.PI));
}
/*
* (non-Javadoc)
*
* @see toxi.math.InterpolateStrategy#interpolate(float, float, float)
*/
public final float interpolate(float a, float b, float f) {
return b + (a - b) * (float) (0.5 + 0.5 * Math.cos(f * MathUtils.PI));
}
}