Here you can find the source of crossProduct(double x1, double y1, double x2, double y2, double x3, double y3)
| Parameter | Description |
|---|---|
| x1 | seg first point x coord |
| y1 | seg first point y coord |
| x2 | seg second point x coord |
| y2 | seg second point y coord |
| x3 | the point to check x coord |
| y3 | the point to check y coord |
static double crossProduct(double x1, double y1, double x2, double y2, double x3, double y3)
//package com.java2s; /**//www. j a va 2 s .c o m * OrbisGIS is a GIS application dedicated to scientific spatial simulation. * This cross-platform GIS is developed at French IRSTV institute and is able to * manipulate and create vector and raster spatial information. * * OrbisGIS is distributed under GPL 3 license. It is produced by the "Atelier SIG" * team of the IRSTV Institute <http://www.irstv.fr/> CNRS FR 2488. * * Copyright (C) 2007-2012 IRSTV (FR CNRS 2488) * * This file is part of OrbisGIS. * * OrbisGIS 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. * * OrbisGIS 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 * OrbisGIS. If not, see <http://www.gnu.org/licenses/>. * * For more information, please consult: <http://www.orbisgis.org/> * or contact directly: * info_at_ orbisgis.org */ public class Main { /** * Compute cross product : * * o(x2,y2) * / * cp > 0 / * / cp < 0 * / * / * o (x1, y1) * * @param x1 seg first point x coord * @param y1 seg first point y coord * @param x2 seg second point x coord * @param y2 seg second point y coord * @param x3 the point to check x coord * @param y3 the point to check y coord * */ static double crossProduct(double x1, double y1, double x2, double y2, double x3, double y3) { return (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1); } }