/*
* __ .__ .__ ._____.
* _/ |_ _______ __|__| ____ | | |__\_ |__ ______
* \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/
* | | ( <_> > <| \ \___| |_| || \_\ \\___ \
* |__| \____/__/\_ \__|\___ >____/__||___ /____ >
* \/ \/ \/ \/
*
* 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.geom;
/**
* Helper class for the spline3d classes in this package. Used to compute
* subdivision points of the curve.
*/
public class BernsteinPolynomial {
public float[] b0, b1, b2, b3;
public int resolution;
/**
* @param res
* number of subdivision steps between each control point of the
* spline3d
*/
public BernsteinPolynomial(int res) {
resolution = res;
b0 = new float[res];
b1 = new float[res];
b2 = new float[res];
b3 = new float[res];
float t = 0;
float dt = 1.0f / (resolution - 1);
for (int i = 0; i < resolution; i++) {
float t1 = 1 - t;
float t12 = t1 * t1;
float t2 = t * t;
b0[i] = t1 * t12;
b1[i] = 3 * t * t12;
b2[i] = 3 * t2 * t1;
b3[i] = t * t2;
t += dt;
}
}
}