Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *     This file is part of Skiggle, an online handwriting recognition
 *     Java application.
 *     Copyright (C) 2009-2011 Willie Lim <wlim650@gmail.com>
 *
 *     Skiggle is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Skiggle 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with Skiggle.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

import android.graphics.PointF;

public class Main {
    public static float computeCurvatureHK2003(float x0, float y0, float x1, float y1, float x2, float y2) {

        double kappa = 0.0D;

        float lB = distanceBetween2Points(x1, y1, x0, y0);
        float lF = distanceBetween2Points(x1, y1, x2, y2);
        float thetaB = (float) Math.atan2(x0 - x1, y0 - y1);
        float thetaF = (float) Math.atan2(x2 - x1, y2 - y1);

        float delta = Math.abs(thetaB - thetaF) / 2;

        kappa = (1 / lB + 1 / lF) * delta / 2;
        return (float) kappa;
    }

    public static float distanceBetween2Points(float x1, float y1, float x2, float y2) {

        return PointF.length(Math.abs(x1 - x2), Math.abs(y1 - y2));
    }
}