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pnpoly.h
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pnpoly.h
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int pnpoly(int nvert, double *vertx, double *verty, double testx, double testy);
// Source: https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html
// modified here for double precision
// Copyright (c) 1970-2003, Wm. Randolph Franklin
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
// Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimers.
// 2. Redistributions in binary form must reproduce the above copyright notice
// in the documentation and/or other materials provided with the distribution.
// 3. The name of W. Randolph Franklin may not be used to endorse or promote
// products derived from this Software without specific prior written permission.
//
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.