mirror of
https://git.osgeo.org/gitea/postgis/postgis
synced 2024-10-24 17:12:35 +00:00
441a7b3fe7
git-svn-id: http://svn.osgeo.org/postgis/trunk@10630 b70326c6-7e19-0410-871a-916f4a2858ee
265 lines
5.6 KiB
C
265 lines
5.6 KiB
C
/**********************************************************************
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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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*
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* Copyright (C) 2001-2006 Refractions Research Inc.
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "liblwgeom_internal.h"
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#include "lwgeom_log.h"
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/*
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* Convenience functions to hide the POINTARRAY
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* TODO: obsolete this
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*/
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int
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lwpoint_getPoint2d_p(const LWPOINT *point, POINT2D *out)
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{
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return getPoint2d_p(point->point, 0, out);
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}
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/* convenience functions to hide the POINTARRAY */
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int
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lwpoint_getPoint3dz_p(const LWPOINT *point, POINT3DZ *out)
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{
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return getPoint3dz_p(point->point,0,out);
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}
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int
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lwpoint_getPoint3dm_p(const LWPOINT *point, POINT3DM *out)
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{
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return getPoint3dm_p(point->point,0,out);
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}
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int
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lwpoint_getPoint4d_p(const LWPOINT *point, POINT4D *out)
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{
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return getPoint4d_p(point->point,0,out);
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}
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double
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lwpoint_get_x(const LWPOINT *point)
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{
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POINT4D pt;
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if ( lwpoint_is_empty(point) )
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lwerror("lwpoint_get_x called with empty geometry");
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getPoint4d_p(point->point, 0, &pt);
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return pt.x;
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}
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double
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lwpoint_get_y(const LWPOINT *point)
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{
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POINT4D pt;
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if ( lwpoint_is_empty(point) )
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lwerror("lwpoint_get_y called with empty geometry");
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getPoint4d_p(point->point, 0, &pt);
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return pt.y;
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}
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double
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lwpoint_get_z(const LWPOINT *point)
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{
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POINT4D pt;
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if ( lwpoint_is_empty(point) )
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lwerror("lwpoint_get_z called with empty geometry");
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if ( ! FLAGS_GET_Z(point->flags) )
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lwerror("lwpoint_get_z called without z dimension");
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getPoint4d_p(point->point, 0, &pt);
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return pt.z;
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}
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double
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lwpoint_get_m(const LWPOINT *point)
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{
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POINT4D pt;
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if ( lwpoint_is_empty(point) )
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lwerror("lwpoint_get_m called with empty geometry");
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if ( ! FLAGS_GET_M(point->flags) )
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lwerror("lwpoint_get_m called without m dimension");
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getPoint4d_p(point->point, 0, &pt);
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return pt.m;
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}
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/*
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* Construct a new point. point will not be copied
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* use SRID=SRID_UNKNOWN for unknown SRID (will have 8bit type's S = 0)
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*/
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LWPOINT *
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lwpoint_construct(int srid, GBOX *bbox, POINTARRAY *point)
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{
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LWPOINT *result;
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uint8_t flags = 0;
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if (point == NULL)
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return NULL; /* error */
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result = lwalloc(sizeof(LWPOINT));
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result->type = POINTTYPE;
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FLAGS_SET_Z(flags, FLAGS_GET_Z(point->flags));
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FLAGS_SET_M(flags, FLAGS_GET_M(point->flags));
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FLAGS_SET_BBOX(flags, bbox?1:0);
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result->flags = flags;
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result->srid = srid;
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result->point = point;
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result->bbox = bbox;
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return result;
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}
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LWPOINT *
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lwpoint_construct_empty(int srid, char hasz, char hasm)
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{
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LWPOINT *result = lwalloc(sizeof(LWPOINT));
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result->type = POINTTYPE;
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result->flags = gflags(hasz, hasm, 0);
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result->srid = srid;
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result->point = ptarray_construct(hasz, hasm, 0);
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result->bbox = NULL;
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return result;
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}
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LWPOINT *
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lwpoint_make2d(int srid, double x, double y)
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{
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POINT4D p = {x, y, 0.0, 0.0};
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POINTARRAY *pa = ptarray_construct_empty(0, 0, 1);
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ptarray_append_point(pa, &p, LW_TRUE);
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return lwpoint_construct(srid, NULL, pa);
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}
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LWPOINT *
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lwpoint_make3dz(int srid, double x, double y, double z)
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{
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POINT4D p = {x, y, z, 0.0};
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POINTARRAY *pa = ptarray_construct_empty(1, 0, 1);
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ptarray_append_point(pa, &p, LW_TRUE);
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return lwpoint_construct(srid, NULL, pa);
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}
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LWPOINT *
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lwpoint_make3dm(int srid, double x, double y, double m)
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{
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POINT4D p = {x, y, 0.0, m};
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POINTARRAY *pa = ptarray_construct_empty(0, 1, 1);
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ptarray_append_point(pa, &p, LW_TRUE);
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return lwpoint_construct(srid, NULL, pa);
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}
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LWPOINT *
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lwpoint_make4d(int srid, double x, double y, double z, double m)
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{
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POINT4D p = {x, y, z, m};
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POINTARRAY *pa = ptarray_construct_empty(1, 1, 1);
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ptarray_append_point(pa, &p, LW_TRUE);
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return lwpoint_construct(srid, NULL, pa);
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}
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LWPOINT *
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lwpoint_make(int srid, int hasz, int hasm, const POINT4D *p)
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{
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POINTARRAY *pa = ptarray_construct_empty(hasz, hasm, 1);
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ptarray_append_point(pa, p, LW_TRUE);
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return lwpoint_construct(srid, NULL, pa);
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}
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void lwpoint_free(LWPOINT *pt)
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{
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if ( ! pt ) return;
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if ( pt->bbox )
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lwfree(pt->bbox);
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if ( pt->point )
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ptarray_free(pt->point);
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lwfree(pt);
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}
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void printLWPOINT(LWPOINT *point)
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{
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lwnotice("LWPOINT {");
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lwnotice(" ndims = %i", (int)FLAGS_NDIMS(point->flags));
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lwnotice(" BBOX = %i", FLAGS_GET_BBOX(point->flags) ? 1 : 0 );
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lwnotice(" SRID = %i", (int)point->srid);
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printPA(point->point);
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lwnotice("}");
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}
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/* @brief Clone LWPOINT object. Serialized point lists are not copied.
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*
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* @see ptarray_clone
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*/
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LWPOINT *
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lwpoint_clone(const LWPOINT *g)
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{
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LWPOINT *ret = lwalloc(sizeof(LWPOINT));
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LWDEBUG(2, "lwpoint_clone called");
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memcpy(ret, g, sizeof(LWPOINT));
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ret->point = ptarray_clone(g->point);
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if ( g->bbox ) ret->bbox = gbox_copy(g->bbox);
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return ret;
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}
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void
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lwpoint_release(LWPOINT *lwpoint)
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{
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lwgeom_release(lwpoint_as_lwgeom(lwpoint));
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}
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/* check coordinate equality */
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char
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lwpoint_same(const LWPOINT *p1, const LWPOINT *p2)
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{
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return ptarray_same(p1->point, p2->point);
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}
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LWPOINT*
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lwpoint_force_dims(const LWPOINT *point, int hasz, int hasm)
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{
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POINTARRAY *pdims = NULL;
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LWPOINT *pointout;
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/* Return 2D empty */
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if( lwpoint_is_empty(point) )
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{
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pointout = lwpoint_construct_empty(point->srid, hasz, hasm);
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}
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else
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{
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/* Always we duplicate the ptarray and return */
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pdims = ptarray_force_dims(point->point, hasz, hasm);
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pointout = lwpoint_construct(point->srid, NULL, pdims);
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}
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pointout->type = point->type;
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return pointout;
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}
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int lwpoint_is_empty(const LWPOINT *point)
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{
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if ( ! point->point || point->point->npoints < 1 )
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return LW_TRUE;
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return LW_FALSE;
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}
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