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18a9eb4e41
git-svn-id: http://svn.osgeo.org/postgis/trunk@13251 b70326c6-7e19-0410-871a-916f4a2858ee
105 lines
4.6 KiB
C
105 lines
4.6 KiB
C
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/**********************************************************************
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* $Id: measures.h 4715 2009-11-01 17:58:42Z nicklas $
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.net
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* Copyright 2010 Nicklas Avén
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU General Public Licence. See the COPYING file.
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*
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**********************************************************************/
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#include "liblwgeom_internal.h"
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/* for the measure functions*/
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#define DIST_MAX -1
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#define DIST_MIN 1
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/**
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* Structure used in distance-calculations
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*/
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typedef struct
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{
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double distance; /*the distance between p1 and p2*/
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POINT2D p1;
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POINT2D p2;
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int mode; /*the direction of looking, if thedir = -1 then we look for maxdistance and if it is 1 then we look for mindistance*/
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int twisted; /*To preserve the order of incoming points to match the first and secon point in shortest and longest line*/
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double tolerance; /*the tolerance for dwithin and dfullywithin*/
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} DISTPTS;
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typedef struct
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{
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double themeasure; /*a value calculated to compare distances*/
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int pnr; /*pointnumber. the ordernumber of the point*/
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} LISTSTRUCT;
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/*
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* Preprocessing functions
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*/
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int lw_dist2d_comp(LWGEOM *lw1, LWGEOM *lw2, DISTPTS *dl);
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int lw_dist2d_distribute_bruteforce(LWGEOM *lwg1, LWGEOM *lwg2, DISTPTS *dl);
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int lw_dist2d_recursive(const LWGEOM *lwg1, const LWGEOM *lwg2, DISTPTS *dl);
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int lw_dist2d_check_overlap(LWGEOM *lwg1, LWGEOM *lwg2);
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int lw_dist2d_distribute_fast(LWGEOM *lwg1, LWGEOM *lwg2, DISTPTS *dl);
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/*
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* Brute force functions
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*/
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int lw_dist2d_pt_ptarray(const POINT2D *p, POINTARRAY *pa, DISTPTS *dl);
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int lw_dist2d_pt_ptarrayarc(const POINT2D *p, const POINTARRAY *pa, DISTPTS *dl);
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int lw_dist2d_ptarray_ptarray(POINTARRAY *l1, POINTARRAY *l2, DISTPTS *dl);
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int lw_dist2d_ptarray_ptarrayarc(const POINTARRAY *pa, const POINTARRAY *pb, DISTPTS *dl);
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int lw_dist2d_ptarrayarc_ptarrayarc(const POINTARRAY *pa, const POINTARRAY *pb, DISTPTS *dl);
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int lw_dist2d_ptarray_poly(POINTARRAY *pa, LWPOLY *poly, DISTPTS *dl);
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int lw_dist2d_point_point(LWPOINT *point1, LWPOINT *point2, DISTPTS *dl);
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int lw_dist2d_point_line(LWPOINT *point, LWLINE *line, DISTPTS *dl);
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int lw_dist2d_point_circstring(LWPOINT *point, LWCIRCSTRING *circ, DISTPTS *dl);
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int lw_dist2d_point_poly(LWPOINT *point, LWPOLY *poly, DISTPTS *dl);
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int lw_dist2d_point_curvepoly(LWPOINT *point, LWCURVEPOLY *poly, DISTPTS *dl);
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int lw_dist2d_line_line(LWLINE *line1, LWLINE *line2, DISTPTS *dl);
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int lw_dist2d_line_circstring(LWLINE *line1, LWCIRCSTRING *line2, DISTPTS *dl);
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int lw_dist2d_line_poly(LWLINE *line, LWPOLY *poly, DISTPTS *dl);
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int lw_dist2d_line_curvepoly(LWLINE *line, LWCURVEPOLY *poly, DISTPTS *dl);
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int lw_dist2d_circstring_circstring(LWCIRCSTRING *line1, LWCIRCSTRING *line2, DISTPTS *dl);
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int lw_dist2d_circstring_poly(LWCIRCSTRING *circ, LWPOLY *poly, DISTPTS *dl);
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int lw_dist2d_circstring_curvepoly(LWCIRCSTRING *circ, LWCURVEPOLY *poly, DISTPTS *dl);
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int lw_dist2d_poly_poly(LWPOLY *poly1, LWPOLY *poly2, DISTPTS *dl);
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int lw_dist2d_poly_curvepoly(LWPOLY *poly1, LWCURVEPOLY *curvepoly2, DISTPTS *dl);
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int lw_dist2d_curvepoly_curvepoly(LWCURVEPOLY *poly1, LWCURVEPOLY *poly2, DISTPTS *dl);
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/*
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* New faster distance calculations
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*/
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int lw_dist2d_pre_seg_seg(POINTARRAY *l1, POINTARRAY *l2,LISTSTRUCT *list1, LISTSTRUCT *list2,double k, DISTPTS *dl);
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int lw_dist2d_selected_seg_seg(const POINT2D *A, const POINT2D *B, const POINT2D *C, const POINT2D *D, DISTPTS *dl);
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int struct_cmp_by_measure(const void *a, const void *b);
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int lw_dist2d_fast_ptarray_ptarray(POINTARRAY *l1,POINTARRAY *l2, DISTPTS *dl, GBOX *box1, GBOX *box2);
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/*
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* Distance calculation primitives.
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*/
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int lw_dist2d_pt_pt (const POINT2D *P, const POINT2D *Q, DISTPTS *dl);
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int lw_dist2d_pt_seg (const POINT2D *P, const POINT2D *A1, const POINT2D *A2, DISTPTS *dl);
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int lw_dist2d_pt_arc (const POINT2D *P, const POINT2D *A1, const POINT2D *A2, const POINT2D *A3, DISTPTS *dl);
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int lw_dist2d_seg_seg(const POINT2D *A1, const POINT2D *A2, const POINT2D *B1, const POINT2D *B2, DISTPTS *dl);
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int lw_dist2d_seg_arc(const POINT2D *A1, const POINT2D *A2, const POINT2D *B1, const POINT2D *B2, const POINT2D *B3, DISTPTS *dl);
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int lw_dist2d_arc_arc(const POINT2D *A1, const POINT2D *A2, const POINT2D *A3, const POINT2D *B1, const POINT2D *B2, const POINT2D* B3, DISTPTS *dl);
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void lw_dist2d_distpts_init(DISTPTS *dl, int mode);
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/*
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* Length primitives
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*/
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double lw_arc_length(const POINT2D *A1, const POINT2D *A2, const POINT2D *A3);
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/*
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* Geometry returning functions
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*/
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LWGEOM* lw_dist2d_distancepoint(LWGEOM *lw1, LWGEOM *lw2, int srid, int mode);
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LWGEOM* lw_dist2d_distanceline(LWGEOM *lw1, LWGEOM *lw2, int srid, int mode);
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