comparison toolboxes/graph_visualisation/include/graphviz/geom.h @ 0:e9a9cd732c1e tip

first hg version after svn

+/* $Id: geom.h,v 1.14 2009/06/03 01:10:52 ellson Exp $ $Revision: 1.14 $ */
+/* vim:set shiftwidth=4 ts=8: */
+
+/**********************************************************
+*      This software is part of the graphviz package      *
+*                http://www.graphviz.org/                 *
+*                                                         *
+*            Copyright (c) 1994-2004 AT&T Corp.           *
+*                and is licensed under the                *
+*            Common Public License, Version 1.0           *
+*                      by AT&T Corp.                      *
+*                                                         *
+*        Information and Software Systems Research        *
+*              AT&T Research, Florham Park NJ             *
+**********************************************************/
+
+/* geometric types and macros (e.g. points and boxes) with application to, but
+ * no specific dependance on graphs */
+
+#ifndef GV_GEOM_H
+#define GV_GEOM_H
+
+#ifdef HAVE_CONFIG_H
+#include "arith.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+    
+typedef struct { int x, y; } point;
+
+typedef struct pointf_s { double x, y; } pointf;
+
+/* tell pathplan/pathgeom.h */
+#define HAVE_POINTF_S
+
+typedef struct { point LL, UR; } box;
+
+typedef struct { pointf LL, UR; } boxf;
+
+#ifdef HAVE_CONFIG_H
+
+/* true if point p is inside box b */
+#define INSIDE(p,b)	(BETWEEN((b).LL.x,(p).x,(b).UR.x) && BETWEEN((b).LL.y,(p).y,(b).UR.y))
+
+/* true if boxes b0 and b1 overlap */
+#define OVERLAP(b0,b1)	(((b0).UR.x >= (b1).LL.x) && ((b1).UR.x >= (b0).LL.x) && ((b0).UR.y >= (b1).LL.y) && ((b1).UR.y >= (b0).LL.y))
+
+/* true if box b0 completely contains b1*/
+#define CONTAINS(b0,b1)	(((b0).UR.x >= (b1).UR.x) && ((b0).UR.y >= (b1).UR.y) && ((b0).LL.x <= (b1).LL.x) && ((b0).LL.y <= (b1).LL.y))
+
+/* expand box b as needed to enclose point p */
+#define EXPANDBP(b, p)	((b).LL.x = MIN((b).LL.x, (p).x), (b).LL.y = MIN((b).LL.y, (p).y), (b).UR.x = MAX((b).UR.x, (p).x), (b).UR.y = MAX((b).UR.y, (p).y))
+
+/* expand box b0 as needed to enclose box b1 */
+#define EXPANDBB(b0, b1) ((b0).LL.x = MIN((b0).LL.x, (b1).LL.x), (b0).LL.y = MIN((b0).LL.y, (b1).LL.y), (b0).UR.x = MAX((b0).UR.x, (b1).UR.x), (b0).UR.y = MAX((b0).UR.y, (b1).UR.y))
+
+/* clip box b0 to fit box b1 */
+#define CLIPBB(b0, b1) ((b0).LL.x = MAX((b0).LL.x, (b1).LL.x), (b0).LL.y = MAX((b0).LL.y, (b1).LL.y), (b0).UR.x = MIN((b0).UR.x, (b1).UR.x), (b0).UR.y = MIN((b0).UR.y, (b1).UR.y))
+
+#define LEN2(a,b)		(SQR(a) + SQR(b))
+#define LEN(a,b)		(sqrt(LEN2((a),(b))))
+
+#define DIST2(p,q)		(LEN2(((p).x - (q).x),((p).y - (q).y)))
+#define DIST(p,q)		(sqrt(DIST2((p),(q))))
+
+#define POINTS_PER_INCH	72
+#define POINTS_PER_PC		((double)POINTS_PER_INCH / 6)
+#define POINTS_PER_CM		((double)POINTS_PER_INCH * 0.393700787)
+#define POINTS_PER_MM		((double)POINTS_PER_INCH * 0.0393700787)
+
+#define POINTS(a_inches)	(ROUND((a_inches)*POINTS_PER_INCH))
+#define PS2INCH(a_points)	((a_points)/(double)POINTS_PER_INCH)
+
+#define P2PF(p,pf)		((pf).x = (p).x,(pf).y = (p).y)
+#define PF2P(pf,p)		((p).x = ROUND((pf).x),(p).y = ROUND((pf).y))
+
+#define B2BF(b,bf)		(P2PF((b).LL,(bf).LL),P2PF((b).UR,(bf).UR))
+#define BF2B(bf,b)		(PF2P((bf).LL,(b).LL),PF2P((bf).UR,(b).UR))
+
+#define APPROXEQ(a,b,tol)	(ABS((a) - (b)) < (tol))
+#define APPROXEQPT(p,q,tol)	(DIST2((p),(q)) < SQR(tol))
+
+/* some common tolerance values */
+#define MILLIPOINT .001
+#define MICROPOINT .000001
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif