/
lwgeom.c
2507 lines (2246 loc) · 53 KB
/
lwgeom.c
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/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* PostGIS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright (C) 2001-2006 Refractions Research Inc.
* Copyright (C) 2017-2018 Daniel Baston <dbaston@gmail.com>
*
**********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "liblwgeom_internal.h"
#include "lwgeom_log.h"
/** Force Right-hand-rule on LWGEOM polygons **/
void
lwgeom_force_clockwise(LWGEOM *lwgeom)
{
LWCOLLECTION *coll;
uint32_t i;
switch (lwgeom->type)
{
case POLYGONTYPE:
lwpoly_force_clockwise((LWPOLY *)lwgeom);
return;
case TRIANGLETYPE:
lwtriangle_force_clockwise((LWTRIANGLE *)lwgeom);
return;
/* Not handle POLYHEDRALSURFACE and TIN
as they are supposed to be well oriented */
case MULTIPOLYGONTYPE:
case COLLECTIONTYPE:
coll = (LWCOLLECTION *)lwgeom;
for (i=0; i<coll->ngeoms; i++)
lwgeom_force_clockwise(coll->geoms[i]);
return;
}
}
/** Check clockwise orientation on LWGEOM polygons **/
int
lwgeom_is_clockwise(LWGEOM *lwgeom)
{
switch (lwgeom->type)
{
case POLYGONTYPE:
return lwpoly_is_clockwise((LWPOLY *)lwgeom);
case TRIANGLETYPE:
return lwtriangle_is_clockwise((LWTRIANGLE *)lwgeom);
case MULTIPOLYGONTYPE:
case COLLECTIONTYPE:
{
uint32_t i;
LWCOLLECTION* coll = (LWCOLLECTION *)lwgeom;
for (i=0; i < coll->ngeoms; i++)
if (!lwgeom_is_clockwise(coll->geoms[i]))
return LW_FALSE;
return LW_TRUE;
}
default:
return LW_TRUE;
return LW_FALSE;
}
}
LWGEOM *
lwgeom_reverse(const LWGEOM *geom)
{
LWGEOM *geomout = lwgeom_clone_deep(geom);
lwgeom_reverse_in_place(geomout);
return geomout;
}
/** Reverse vertex order of LWGEOM **/
void
lwgeom_reverse_in_place(LWGEOM *geom)
{
uint32_t i;
LWCOLLECTION *col;
if (!geom)
return;
switch (geom->type)
{
case MULTIPOINTTYPE:
case POINTTYPE:
{
return;
}
case TRIANGLETYPE:
case CIRCSTRINGTYPE:
case LINETYPE:
{
LWLINE *line = (LWLINE *)(geom);
ptarray_reverse_in_place(line->points);
return;
}
case POLYGONTYPE:
{
LWPOLY *poly = (LWPOLY *)(geom);
if (!poly->rings)
return;
uint32_t r;
for (r = 0; r < poly->nrings; r++)
ptarray_reverse_in_place(poly->rings[r]);
return;
}
case MULTICURVETYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case MULTISURFACETYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
{
col = (LWCOLLECTION *)(geom);
if (!col->geoms)
return;
for (i=0; i<col->ngeoms; i++)
lwgeom_reverse_in_place(col->geoms[i]);
return;
}
default:
{
lwerror("%s: Unknown geometry type: %s", __func__, lwtype_name(geom->type));
return;
}
}
}
LWPOINT *
lwgeom_as_lwpoint(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == POINTTYPE )
return (LWPOINT *)lwgeom;
else return NULL;
}
LWLINE *
lwgeom_as_lwline(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == LINETYPE )
return (LWLINE *)lwgeom;
else return NULL;
}
LWCIRCSTRING *
lwgeom_as_lwcircstring(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == CIRCSTRINGTYPE )
return (LWCIRCSTRING *)lwgeom;
else return NULL;
}
LWCOMPOUND *
lwgeom_as_lwcompound(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == COMPOUNDTYPE )
return (LWCOMPOUND *)lwgeom;
else return NULL;
}
LWCURVEPOLY *
lwgeom_as_lwcurvepoly(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == CURVEPOLYTYPE )
return (LWCURVEPOLY *)lwgeom;
else return NULL;
}
LWPOLY *
lwgeom_as_lwpoly(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == POLYGONTYPE )
return (LWPOLY *)lwgeom;
else return NULL;
}
LWTRIANGLE *
lwgeom_as_lwtriangle(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == TRIANGLETYPE )
return (LWTRIANGLE *)lwgeom;
else return NULL;
}
LWCOLLECTION *
lwgeom_as_lwcollection(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom_is_collection(lwgeom) )
return (LWCOLLECTION*)lwgeom;
else return NULL;
}
LWMPOINT *
lwgeom_as_lwmpoint(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == MULTIPOINTTYPE )
return (LWMPOINT *)lwgeom;
else return NULL;
}
LWMLINE *
lwgeom_as_lwmline(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == MULTILINETYPE )
return (LWMLINE *)lwgeom;
else return NULL;
}
LWMPOLY *
lwgeom_as_lwmpoly(const LWGEOM *lwgeom)
{
if ( lwgeom == NULL ) return NULL;
if ( lwgeom->type == MULTIPOLYGONTYPE )
return (LWMPOLY *)lwgeom;
else return NULL;
}
LWPSURFACE *
lwgeom_as_lwpsurface(const LWGEOM *lwgeom)
{
if ( lwgeom->type == POLYHEDRALSURFACETYPE )
return (LWPSURFACE *)lwgeom;
else return NULL;
}
LWTIN *
lwgeom_as_lwtin(const LWGEOM *lwgeom)
{
if ( lwgeom->type == TINTYPE )
return (LWTIN *)lwgeom;
else return NULL;
}
LWGEOM *lwtin_as_lwgeom(const LWTIN *obj)
{
return (LWGEOM *)obj;
}
LWGEOM *lwpsurface_as_lwgeom(const LWPSURFACE *obj)
{
return (LWGEOM *)obj;
}
LWGEOM *lwmpoly_as_lwgeom(const LWMPOLY *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwmline_as_lwgeom(const LWMLINE *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwmpoint_as_lwgeom(const LWMPOINT *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwcollection_as_lwgeom(const LWCOLLECTION *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwcircstring_as_lwgeom(const LWCIRCSTRING *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwcurvepoly_as_lwgeom(const LWCURVEPOLY *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwcompound_as_lwgeom(const LWCOMPOUND *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwpoly_as_lwgeom(const LWPOLY *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwtriangle_as_lwgeom(const LWTRIANGLE *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwline_as_lwgeom(const LWLINE *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
LWGEOM *lwpoint_as_lwgeom(const LWPOINT *obj)
{
if ( obj == NULL ) return NULL;
return (LWGEOM *)obj;
}
/**
** Look-up for the correct MULTI* type promotion for singleton types.
*/
uint8_t MULTITYPE[NUMTYPES] =
{
0,
MULTIPOINTTYPE, /* 1 */
MULTILINETYPE, /* 2 */
MULTIPOLYGONTYPE, /* 3 */
0,0,0,0,
MULTICURVETYPE, /* 8 */
MULTICURVETYPE, /* 9 */
MULTISURFACETYPE, /* 10 */
POLYHEDRALSURFACETYPE, /* 11 */
0, 0,
TINTYPE, /* 14 */
0
};
uint8_t lwtype_multitype(uint8_t type)
{
if (type > 15 || type < 0) return 0;
return MULTITYPE[type];
}
/**
* Create a new LWGEOM of the appropriate MULTI* type.
*/
LWGEOM *
lwgeom_as_multi(const LWGEOM *lwgeom)
{
LWGEOM **ogeoms;
LWGEOM *ogeom = NULL;
GBOX *box = NULL;
int type;
type = lwgeom->type;
if ( ! MULTITYPE[type] ) return lwgeom_clone(lwgeom);
if( lwgeom_is_empty(lwgeom) )
{
ogeom = (LWGEOM *)lwcollection_construct_empty(
MULTITYPE[type],
lwgeom->srid,
FLAGS_GET_Z(lwgeom->flags),
FLAGS_GET_M(lwgeom->flags)
);
}
else
{
ogeoms = lwalloc(sizeof(LWGEOM*));
ogeoms[0] = lwgeom_clone(lwgeom);
/* Sub-geometries are not allowed to have bboxes or SRIDs, move the bbox to the collection */
box = ogeoms[0]->bbox;
ogeoms[0]->bbox = NULL;
ogeoms[0]->srid = SRID_UNKNOWN;
ogeom = (LWGEOM *)lwcollection_construct(MULTITYPE[type], lwgeom->srid, box, 1, ogeoms);
}
return ogeom;
}
/**
* Create a new LWGEOM of the appropriate CURVE* type.
*/
LWGEOM *
lwgeom_as_curve(const LWGEOM *lwgeom)
{
LWGEOM *ogeom;
int type = lwgeom->type;
/*
int hasz = FLAGS_GET_Z(lwgeom->flags);
int hasm = FLAGS_GET_M(lwgeom->flags);
int srid = lwgeom->srid;
*/
switch(type)
{
case LINETYPE:
/* turn to COMPOUNDCURVE */
ogeom = (LWGEOM*)lwcompound_construct_from_lwline((LWLINE*)lwgeom);
break;
case POLYGONTYPE:
ogeom = (LWGEOM*)lwcurvepoly_construct_from_lwpoly(lwgeom_as_lwpoly(lwgeom));
break;
case MULTILINETYPE:
/* turn to MULTICURVE */
ogeom = lwgeom_clone(lwgeom);
ogeom->type = MULTICURVETYPE;
break;
case MULTIPOLYGONTYPE:
/* turn to MULTISURFACE */
ogeom = lwgeom_clone(lwgeom);
ogeom->type = MULTISURFACETYPE;
break;
case COLLECTIONTYPE:
default:
ogeom = lwgeom_clone(lwgeom);
break;
}
/* TODO: copy bbox from input geom ? */
return ogeom;
}
/**
* Free the containing LWGEOM and the associated BOX. Leave the underlying
* geoms/points/point objects intact. Useful for functions that are stripping
* out subcomponents of complex objects, or building up new temporary objects
* on top of subcomponents.
*/
void
lwgeom_release(LWGEOM *lwgeom)
{
if ( ! lwgeom )
lwerror("lwgeom_release: someone called on 0x0");
LWDEBUGF(3, "releasing type %s", lwtype_name(lwgeom->type));
/* Drop bounding box (always a copy) */
if ( lwgeom->bbox )
{
LWDEBUGF(3, "lwgeom_release: releasing bbox. %p", lwgeom->bbox);
lwfree(lwgeom->bbox);
}
lwfree(lwgeom);
}
/* @brief Clone LWGEOM object. Serialized point lists are not copied.
*
* @see ptarray_clone
*/
LWGEOM *
lwgeom_clone(const LWGEOM *lwgeom)
{
LWDEBUGF(2, "lwgeom_clone called with %p, %s",
lwgeom, lwtype_name(lwgeom->type));
switch (lwgeom->type)
{
case POINTTYPE:
return (LWGEOM *)lwpoint_clone((LWPOINT *)lwgeom);
case LINETYPE:
return (LWGEOM *)lwline_clone((LWLINE *)lwgeom);
case CIRCSTRINGTYPE:
return (LWGEOM *)lwcircstring_clone((LWCIRCSTRING *)lwgeom);
case POLYGONTYPE:
return (LWGEOM *)lwpoly_clone((LWPOLY *)lwgeom);
case TRIANGLETYPE:
return (LWGEOM *)lwtriangle_clone((LWTRIANGLE *)lwgeom);
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
return (LWGEOM *)lwcollection_clone((LWCOLLECTION *)lwgeom);
default:
lwerror("lwgeom_clone: Unknown geometry type: %s", lwtype_name(lwgeom->type));
return NULL;
}
}
/**
* Deep-clone an #LWGEOM object. #POINTARRAY <em>are</em> copied.
*/
LWGEOM *
lwgeom_clone_deep(const LWGEOM *lwgeom)
{
LWDEBUGF(2, "lwgeom_clone called with %p, %s",
lwgeom, lwtype_name(lwgeom->type));
switch (lwgeom->type)
{
case POINTTYPE:
case LINETYPE:
case CIRCSTRINGTYPE:
case TRIANGLETYPE:
return (LWGEOM *)lwline_clone_deep((LWLINE *)lwgeom);
case POLYGONTYPE:
return (LWGEOM *)lwpoly_clone_deep((LWPOLY *)lwgeom);
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
return (LWGEOM *)lwcollection_clone_deep((LWCOLLECTION *)lwgeom);
default:
lwerror("lwgeom_clone_deep: Unknown geometry type: %s", lwtype_name(lwgeom->type));
return NULL;
}
}
/**
* Return an alloced string
*/
char*
lwgeom_to_ewkt(const LWGEOM *lwgeom)
{
char* wkt = NULL;
size_t wkt_size = 0;
wkt = lwgeom_to_wkt(lwgeom, WKT_EXTENDED, 12, &wkt_size);
if ( ! wkt )
{
lwerror("Error writing geom %p to WKT", lwgeom);
}
return wkt;
}
/**
* @brief geom1 same as geom2
* iff
* + have same type
* + have same # objects
* + have same bvol
* + each object in geom1 has a corresponding object in geom2 (see above)
* @param lwgeom1
* @param lwgeom2
*/
char
lwgeom_same(const LWGEOM *lwgeom1, const LWGEOM *lwgeom2)
{
LWDEBUGF(2, "lwgeom_same(%s, %s) called",
lwtype_name(lwgeom1->type),
lwtype_name(lwgeom2->type));
if ( lwgeom1->type != lwgeom2->type )
{
LWDEBUG(3, " type differ");
return LW_FALSE;
}
if ( FLAGS_GET_ZM(lwgeom1->flags) != FLAGS_GET_ZM(lwgeom2->flags) )
{
LWDEBUG(3, " ZM flags differ");
return LW_FALSE;
}
/* Check boxes if both already computed */
if ( lwgeom1->bbox && lwgeom2->bbox )
{
/*lwnotice("bbox1:%p, bbox2:%p", lwgeom1->bbox, lwgeom2->bbox);*/
if ( ! gbox_same(lwgeom1->bbox, lwgeom2->bbox) )
{
LWDEBUG(3, " bounding boxes differ");
return LW_FALSE;
}
}
/* geoms have same type, invoke type-specific function */
switch (lwgeom1->type)
{
case POINTTYPE:
return lwpoint_same((LWPOINT *)lwgeom1,
(LWPOINT *)lwgeom2);
case LINETYPE:
return lwline_same((LWLINE *)lwgeom1,
(LWLINE *)lwgeom2);
case POLYGONTYPE:
return lwpoly_same((LWPOLY *)lwgeom1,
(LWPOLY *)lwgeom2);
case TRIANGLETYPE:
return lwtriangle_same((LWTRIANGLE *)lwgeom1,
(LWTRIANGLE *)lwgeom2);
case CIRCSTRINGTYPE:
return lwcircstring_same((LWCIRCSTRING *)lwgeom1,
(LWCIRCSTRING *)lwgeom2);
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
return lwcollection_same((LWCOLLECTION *)lwgeom1,
(LWCOLLECTION *)lwgeom2);
default:
lwerror("lwgeom_same: unsupported geometry type: %s",
lwtype_name(lwgeom1->type));
return LW_FALSE;
}
}
int
lwpoint_inside_circle(const LWPOINT *p, double cx, double cy, double rad)
{
const POINT2D *pt;
POINT2D center;
if ( ! p || ! p->point )
return LW_FALSE;
pt = getPoint2d_cp(p->point, 0);
center.x = cx;
center.y = cy;
if ( distance2d_pt_pt(pt, ¢er) < rad )
return LW_TRUE;
return LW_FALSE;
}
void
lwgeom_drop_bbox(LWGEOM *lwgeom)
{
if ( lwgeom->bbox ) lwfree(lwgeom->bbox);
lwgeom->bbox = NULL;
FLAGS_SET_BBOX(lwgeom->flags, 0);
}
/**
* Ensure there's a box in the LWGEOM.
* If the box is already there just return,
* else compute it.
*/
void
lwgeom_add_bbox(LWGEOM *lwgeom)
{
/* an empty LWGEOM has no bbox */
if ( lwgeom_is_empty(lwgeom) ) return;
if ( lwgeom->bbox ) return;
FLAGS_SET_BBOX(lwgeom->flags, 1);
lwgeom->bbox = gbox_new(lwgeom->flags);
lwgeom_calculate_gbox(lwgeom, lwgeom->bbox);
}
void
lwgeom_refresh_bbox(LWGEOM *lwgeom)
{
lwgeom_drop_bbox(lwgeom);
lwgeom_add_bbox(lwgeom);
}
void
lwgeom_add_bbox_deep(LWGEOM *lwgeom, GBOX *gbox)
{
if ( lwgeom_is_empty(lwgeom) ) return;
FLAGS_SET_BBOX(lwgeom->flags, 1);
if ( ! ( gbox || lwgeom->bbox ) )
{
lwgeom->bbox = gbox_new(lwgeom->flags);
lwgeom_calculate_gbox(lwgeom, lwgeom->bbox);
}
else if ( gbox && ! lwgeom->bbox )
{
lwgeom->bbox = gbox_clone(gbox);
}
if ( lwgeom_is_collection(lwgeom) )
{
uint32_t i;
LWCOLLECTION *lwcol = (LWCOLLECTION*)lwgeom;
for ( i = 0; i < lwcol->ngeoms; i++ )
{
lwgeom_add_bbox_deep(lwcol->geoms[i], lwgeom->bbox);
}
}
}
const GBOX *
lwgeom_get_bbox(const LWGEOM *lwg)
{
/* add it if not already there */
lwgeom_add_bbox((LWGEOM *)lwg);
return lwg->bbox;
}
/**
* Calculate the gbox for this geometry, a cartesian box or
* geodetic box, depending on how it is flagged.
*/
int lwgeom_calculate_gbox(const LWGEOM *lwgeom, GBOX *gbox)
{
gbox->flags = lwgeom->flags;
if( FLAGS_GET_GEODETIC(lwgeom->flags) )
return lwgeom_calculate_gbox_geodetic(lwgeom, gbox);
else
return lwgeom_calculate_gbox_cartesian(lwgeom, gbox);
}
void
lwgeom_drop_srid(LWGEOM *lwgeom)
{
lwgeom->srid = SRID_UNKNOWN; /* TODO: To be changed to SRID_UNKNOWN */
}
LWGEOM *
lwgeom_segmentize2d(const LWGEOM *lwgeom, double dist)
{
switch (lwgeom->type)
{
case LINETYPE:
return (LWGEOM *)lwline_segmentize2d((LWLINE *)lwgeom,
dist);
case POLYGONTYPE:
return (LWGEOM *)lwpoly_segmentize2d((LWPOLY *)lwgeom,
dist);
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case COLLECTIONTYPE:
return (LWGEOM *)lwcollection_segmentize2d(
(LWCOLLECTION *)lwgeom, dist);
default:
return lwgeom_clone(lwgeom);
}
}
LWGEOM*
lwgeom_force_2d(const LWGEOM *geom)
{
return lwgeom_force_dims(geom, 0, 0);
}
LWGEOM*
lwgeom_force_3dz(const LWGEOM *geom)
{
return lwgeom_force_dims(geom, 1, 0);
}
LWGEOM*
lwgeom_force_3dm(const LWGEOM *geom)
{
return lwgeom_force_dims(geom, 0, 1);
}
LWGEOM*
lwgeom_force_4d(const LWGEOM *geom)
{
return lwgeom_force_dims(geom, 1, 1);
}
LWGEOM*
lwgeom_force_dims(const LWGEOM *geom, int hasz, int hasm)
{
switch(geom->type)
{
case POINTTYPE:
return lwpoint_as_lwgeom(lwpoint_force_dims((LWPOINT*)geom, hasz, hasm));
case CIRCSTRINGTYPE:
case LINETYPE:
case TRIANGLETYPE:
return lwline_as_lwgeom(lwline_force_dims((LWLINE*)geom, hasz, hasm));
case POLYGONTYPE:
return lwpoly_as_lwgeom(lwpoly_force_dims((LWPOLY*)geom, hasz, hasm));
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
return lwcollection_as_lwgeom(lwcollection_force_dims((LWCOLLECTION*)geom, hasz, hasm));
default:
lwerror("lwgeom_force_2d: unsupported geom type: %s", lwtype_name(geom->type));
return NULL;
}
}
LWGEOM*
lwgeom_force_sfs(LWGEOM *geom, int version)
{
LWCOLLECTION *col;
uint32_t i;
LWGEOM *g;
/* SFS 1.2 version */
if (version == 120)
{
switch(geom->type)
{
/* SQL/MM types */
case CIRCSTRINGTYPE:
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
return lwgeom_stroke(geom, 32);
case COLLECTIONTYPE:
col = (LWCOLLECTION*)geom;
for ( i = 0; i < col->ngeoms; i++ )
col->geoms[i] = lwgeom_force_sfs((LWGEOM*)col->geoms[i], version);
return lwcollection_as_lwgeom((LWCOLLECTION*)geom);
default:
return (LWGEOM *)geom;
}
}
/* SFS 1.1 version */
switch(geom->type)
{
/* SQL/MM types */
case CIRCSTRINGTYPE:
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
return lwgeom_stroke(geom, 32);
/* SFS 1.2 types */
case TRIANGLETYPE:
g = lwpoly_as_lwgeom(lwpoly_from_lwlines((LWLINE*)geom, 0, NULL));
lwgeom_free(geom);
return g;
case TINTYPE:
col = (LWCOLLECTION*) geom;
for ( i = 0; i < col->ngeoms; i++ )
{
g = lwpoly_as_lwgeom(lwpoly_from_lwlines((LWLINE*)col->geoms[i], 0, NULL));
lwgeom_free(col->geoms[i]);
col->geoms[i] = g;
}
col->type = COLLECTIONTYPE;
return lwmpoly_as_lwgeom((LWMPOLY*)geom);
case POLYHEDRALSURFACETYPE:
geom->type = COLLECTIONTYPE;
return (LWGEOM *)geom;
/* Collection */
case COLLECTIONTYPE:
col = (LWCOLLECTION*)geom;
for ( i = 0; i < col->ngeoms; i++ )
col->geoms[i] = lwgeom_force_sfs((LWGEOM*)col->geoms[i], version);
return lwcollection_as_lwgeom((LWCOLLECTION*)geom);
default:
return (LWGEOM *)geom;
}
}
int32_t
lwgeom_get_srid(const LWGEOM *geom)
{
if ( ! geom ) return SRID_UNKNOWN;
return geom->srid;
}
uint32_t
lwgeom_get_type(const LWGEOM *geom)
{
if ( ! geom ) return 0;
return geom->type;
}
int
lwgeom_has_z(const LWGEOM *geom)
{
if ( ! geom ) return LW_FALSE;
return FLAGS_GET_Z(geom->flags);
}
int
lwgeom_has_m(const LWGEOM *geom)
{
if ( ! geom ) return LW_FALSE;
return FLAGS_GET_M(geom->flags);
}
int
lwgeom_ndims(const LWGEOM *geom)
{
if ( ! geom ) return 0;
return FLAGS_NDIMS(geom->flags);
}
void
lwgeom_set_geodetic(LWGEOM *geom, int value)
{
LWPOINT *pt;
LWLINE *ln;
LWPOLY *ply;
LWCOLLECTION *col;
uint32_t i;
FLAGS_SET_GEODETIC(geom->flags, value);
if ( geom->bbox )
FLAGS_SET_GEODETIC(geom->bbox->flags, value);
switch(geom->type)
{
case POINTTYPE:
pt = (LWPOINT*)geom;
if ( pt->point )
FLAGS_SET_GEODETIC(pt->point->flags, value);
break;
case LINETYPE:
ln = (LWLINE*)geom;
if ( ln->points )
FLAGS_SET_GEODETIC(ln->points->flags, value);
break;
case POLYGONTYPE:
ply = (LWPOLY*)geom;
for ( i = 0; i < ply->nrings; i++ )
FLAGS_SET_GEODETIC(ply->rings[i]->flags, value);
break;
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case COLLECTIONTYPE:
col = (LWCOLLECTION*)geom;
for ( i = 0; i < col->ngeoms; i++ )
lwgeom_set_geodetic(col->geoms[i], value);
break;
default:
lwerror("lwgeom_set_geodetic: unsupported geom type: %s", lwtype_name(geom->type));
return;
}
}
void
lwgeom_longitude_shift(LWGEOM *lwgeom)
{
uint32_t i;
switch (lwgeom->type)
{