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- /*************************************************************************
- * Copyright (c) 2011 AT&T Intellectual Property
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * https://www.eclipse.org/legal/epl-v10.html
- *
- * Contributors: Details at https://graphviz.org
- *************************************************************************/
- #pragma once
- #include <stddef.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- #ifdef HAVE_POINTF_S
- typedef pointf Point;
- #else
- typedef struct Point {
- double x, y;
- } Point;
- #endif
- extern double xmin, xmax, ymin, ymax; /* extreme x,y values of sites */
- extern double deltax; // xmax - xmin
- extern size_t nsites; // Number of sites
- extern int sqrt_nsites;
- extern void geominit(void);
- extern double dist_2(Point, Point); ///< distance squared between two points
- extern void subpt(Point * a, Point b, Point c);
- extern void addpt(Point * a, Point b, Point c);
- extern double area_2(Point a, Point b, Point c);
- extern int leftOf(Point a, Point b, Point c);
- extern int intersection(Point a, Point b, Point c, Point d, Point * p);
- #ifdef __cplusplus
- }
- #endif
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