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https://git.osgeo.org/gitea/postgis/postgis
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564f011ec9
git-svn-id: http://svn.osgeo.org/postgis/trunk@14604 b70326c6-7e19-0410-871a-916f4a2858ee
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/**********************************************************************
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.net
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*
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* PostGIS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* PostGIS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
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*
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**********************************************************************
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*
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* Copyright (C) 2001-2006 Refractions Research Inc.
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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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void
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lwmpoint_release(LWMPOINT *lwmpoint)
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{
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lwgeom_release(lwmpoint_as_lwgeom(lwmpoint));
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}
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LWMPOINT *
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lwmpoint_construct_empty(int srid, char hasz, char hasm)
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{
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LWMPOINT *ret = (LWMPOINT*)lwcollection_construct_empty(MULTIPOINTTYPE, srid, hasz, hasm);
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return ret;
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}
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LWMPOINT* lwmpoint_add_lwpoint(LWMPOINT *mobj, const LWPOINT *obj)
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{
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LWDEBUG(4, "Called");
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return (LWMPOINT*)lwcollection_add_lwgeom((LWCOLLECTION*)mobj, (LWGEOM*)obj);
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}
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LWMPOINT *
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lwmpoint_construct(int srid, const POINTARRAY *pa)
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{
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int i;
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int hasz = ptarray_has_z(pa);
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int hasm = ptarray_has_m(pa);
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LWMPOINT *ret = (LWMPOINT*)lwcollection_construct_empty(MULTIPOINTTYPE, srid, hasz, hasm);
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for ( i = 0; i < pa->npoints; i++ )
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{
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LWPOINT *lwp;
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POINT4D p;
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getPoint4d_p(pa, i, &p);
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lwp = lwpoint_make(srid, hasz, hasm, &p);
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lwmpoint_add_lwpoint(ret, lwp);
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}
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return ret;
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}
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void lwmpoint_free(LWMPOINT *mpt)
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{
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int i;
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if ( ! mpt ) return;
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if ( mpt->bbox )
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lwfree(mpt->bbox);
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for ( i = 0; i < mpt->ngeoms; i++ )
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if ( mpt->geoms && mpt->geoms[i] )
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lwpoint_free(mpt->geoms[i]);
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if ( mpt->geoms )
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lwfree(mpt->geoms);
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lwfree(mpt);
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}
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LWGEOM*
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lwmpoint_remove_repeated_points(const LWMPOINT *mpoint, double tolerance)
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{
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uint32_t nnewgeoms;
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uint32_t i, j;
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LWGEOM **newgeoms;
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newgeoms = lwalloc(sizeof(LWGEOM *)*mpoint->ngeoms);
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nnewgeoms = 0;
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for (i=0; i<mpoint->ngeoms; ++i)
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{
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/* Brute force, may be optimized by building an index */
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int seen=0;
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for (j=0; j<nnewgeoms; ++j)
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{
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if ( lwpoint_same((LWPOINT*)newgeoms[j],
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(LWPOINT*)mpoint->geoms[i]) )
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{
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seen=1;
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break;
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}
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}
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if ( seen ) continue;
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newgeoms[nnewgeoms++] = (LWGEOM*)lwpoint_clone(mpoint->geoms[i]);
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}
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return (LWGEOM*)lwcollection_construct(mpoint->type,
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mpoint->srid, mpoint->bbox ? gbox_copy(mpoint->bbox) : NULL,
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nnewgeoms, newgeoms);
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}
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LWMPOINT*
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lwmpoint_from_lwgeom(const LWGEOM *g)
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{
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LWPOINTITERATOR* it = lwpointiterator_create(g);
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int has_z = lwgeom_has_z(g);
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int has_m = lwgeom_has_m(g);
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LWMPOINT* result = lwmpoint_construct_empty(g->srid, has_z, has_m);
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POINT4D p;
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while(lwpointiterator_next(it, &p)) {
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LWPOINT* lwp = lwpoint_make(g->srid, has_z, has_m, &p);
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lwmpoint_add_lwpoint(result, lwp);
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}
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lwpointiterator_destroy(it);
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return result;
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}
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