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53 lines
1.8 KiB
C
53 lines
1.8 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 2001-2006 Refractions Research Inc.
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* Copyright 2007-2008 Mark Cave-Ayland
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* Copyright 2008 Paul Ramsey <pramsey@cleverelephant.ca>
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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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POINT3DZ p1;
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POINT3DZ p2;
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int mode; /*the direction of looking, if thedir = -1 then we look for 3dmaxdistance and if it is 1 then we look for 3dmindistance*/
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int twisted; /*To preserve the order of incoming points to match the first and second point in 3dshortest and 3dlongest line*/
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double tolerance; /*the tolerance for 3ddwithin and 3ddfullywithin*/
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} DISTPTS3D;
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/*
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Preprocessing functions
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*/
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int lw_dist3d_distribute_bruteforce(LWGEOM *lwg1, LWGEOM *lwg2, DISTPTS3D *dl);
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int lw_dist3d_recursive(const LWCOLLECTION * lwg1,const LWCOLLECTION * lwg2, DISTPTS3D *dl);
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int lw_dist3d_distribute_fast(LWGEOM *lwg1, LWGEOM *lwg2, DISTPTS3D *dl);
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/*
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Brute force functions
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*/
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int lw_dist3d_pt_ptarray(POINT3DZ *p, POINTARRAY *pa, DISTPTS3D *dl);
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int lw_dist3d_point_point(LWPOINT *point1, LWPOINT *point2, DISTPTS3D *dl);
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int lw_dist3d_point_line(LWPOINT *point, LWLINE *line, DISTPTS3D *dl);
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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_dist3d_pt_pt(POINT3DZ *p1, POINT3DZ *p2, DISTPTS3D *dl);
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int lw_dist3d_pt_seg(POINT3DZ *p, POINT3DZ *A, POINT3DZ *B, DISTPTS3D *dl);
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