/***************************************************************************
 *                                                                         *
 *   INPOLY.H                                                              *
 *                                                                         *
 *   Copyright (C) 1995 GALACTICOMM, Inc.  Freeware source code.           *
 *                                                                         *
 *   Please feel free to use this source code for any purpose, commercial  *
 *   or otherwise, as long as you don't restrict anyone else's use of      *
 *   this source code.  Please give credit where credit is due.            *
 *                                                                         *
 *   Point-in-polygon algorithm, created especially for World-Wide Web     *
 *   servers to process image maps with mouse-clickable regions.           *
 *                                                                         *
 *   Home for this file:  ftp://gcomm.com/library/develop/inpoly.c         *
 *                                                                         *
 *                                       6/19/95 - Bob Stein & Craig Yap   *
 *                                       stein@gcomm.com                   *
 *                                       craig@cse.fau.edu                 *
 *                                                                         *
 ***************************************************************************/

int                                /*   1=yes, 0=no                        */
inpoly(                            /* is target point inside a 2D polygon? */
unsigned int poly[][2],            /*   polygon points, [0]=x, [1]=y       */
int npoints,                       /*   number of points in polygon        */
unsigned int xt,                   /*   x (horizontal) of target point     */
unsigned int yt);                  /*   y (vertical) of target point       */