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73 lines
2.8 KiB
C
73 lines
2.8 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.refractions.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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/**
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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_seg_seg(POINT2D *A, POINT2D *B, POINT2D *C, POINT2D *D, DISTPTS *dl);
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int lw_dist2d_pt_ptarray(POINT2D *p, 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_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_line_line(LWLINE *line1, LWLINE *line2, DISTPTS *dl);
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int lw_dist2d_point_poly(LWPOINT *point, LWPOLY *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_line_poly(LWLINE *line, LWPOLY *poly, 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(POINT2D *A, POINT2D *B, POINT2D *C, 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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Functions in common for Brute force and new calculation
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*/
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int lw_dist2d_pt_pt(POINT2D *p1, POINT2D *p2, DISTPTS *dl);
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int lw_dist2d_pt_seg(POINT2D *p, POINT2D *A, POINT2D *B, DISTPTS *dl);
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