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postgis/sfcgal/lwgeom_sfcgal.c
Loïc Bartoletti a3410349dc Closes https://git.osgeo.org/gitea/postgis/postgis/pulls/98 
Closes #5143
Squashed commit of the following:

commit 6dad8a00b11e5961c08ebc676f10bfbf25c8eff1
Author: Regina Obe <lr@pcorp.us>
Date:   Tue May 3 18:35:28 2022 -0400

    Change tests to check for sfcgal version at compile time
    Fix docs, function signature and xml validaty

commit 4ba5288a7dece6cb14a204c1206345c7cc9f491a
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Tue May 3 06:47:07 2022 +0200

    fix tests

commit 88b449750e6c5152741c16659771136747253ff8
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Tue May 3 06:32:26 2022 +0200

    fix if postgis_sfcgal_version and fix build

commit 6865e31dd9f078dd0e05a72efc3282c613b97fc9
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Tue May 3 06:18:22 2022 +0200

    seperate alphashape test

commit cefccb67156b4fc7d797a6ff199c76b2e8a74754
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Tue May 3 05:58:57 2022 +0200

    fix the ifdef part and add a message error

commit eb3801e92aa48f42edaa828f3f0fced44b118f32
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Tue May 3 05:58:29 2022 +0200

    add informaiton aoubt SFCGAL > 1.4.1

commit e96550d4d89f7b8ddb4e09c7bd7845a37f3f7bb5
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Mon May 2 10:40:09 2022 +0200

    fix doc

commit 0b5e6a35b317b285b133ff8247c761da0e40d83e
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Mon May 2 09:44:49 2022 +0200

    Use singular: AlphaShapes => AlphaShape

commit 8e92c13cc0bb72760d467b35b4f4a409732bfb17
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Fri Mar 4 11:55:21 2022 +0100

    Add SFCGAL optimal alpha shapes doc

commit 734c430d337354143b1fe466f6e8bf1597c6e674
Author: Loïc Bartoletti <loic.bartoletti@oslandia.com>
Date:   Fri Mar 4 11:33:16 2022 +0100

    Add SFCGAL alpha shapes
2022-05-03 19:01:36 -04:00

735 lines
18 KiB
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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 2012-2020 Oslandia <infos@oslandia.com>
*
**********************************************************************/
#include "SFCGAL/capi/sfcgal_c.h"
#include "postgres.h"
#include "fmgr.h"
#include "utils/builtins.h"
#include "lwgeom_pg.h"
#include "lwgeom_sfcgal.h"
#include "../postgis_config.h"
#include "utils/elog.h"
#include "utils/guc.h"
#include "libpq/pqsignal.h"
#include "../liblwgeom/liblwgeom.h"
/*
* This is required for builds against pgsql
*/
PG_MODULE_MAGIC;
#ifdef WIN32
static void interruptCallback() {
if (UNBLOCKED_SIGNAL_QUEUE())
pgwin32_dispatch_queued_signals();
}
#endif
static pqsigfunc coreIntHandler = 0;
static void handleInterrupt(int sig);
/*
* Module load callback
*/
void _PG_init(void);
void
_PG_init(void)
{
coreIntHandler = pqsignal(SIGINT, handleInterrupt);
#ifdef WIN32
GEOS_interruptRegisterCallback(interruptCallback);
lwgeom_register_interrupt_callback(interruptCallback);
#endif
/* install PostgreSQL handlers */
pg_install_lwgeom_handlers();
}
/*
* Module unload callback
*/
void _PG_fini(void);
void
_PG_fini(void)
{
elog(NOTICE, "Goodbye from PostGIS SFCGAL %s", POSTGIS_VERSION);
pqsignal(SIGINT, coreIntHandler);
}
static void
handleInterrupt(int sig)
{
/* NOTE: printf here would be dangerous, see
* https://trac.osgeo.org/postgis/ticket/3644
*
* TODO: block interrupts during execution, to fix the problem
*/
/* printf("Interrupt requested\n"); fflush(stdout); */
/* request interruption of liblwgeom as well */
lwgeom_request_interrupt();
if ( coreIntHandler ) {
(*coreIntHandler)(sig);
}
}
Datum postgis_sfcgal_version(PG_FUNCTION_ARGS);
#if POSTGIS_SFCGAL_VERSION >= 10400
Datum postgis_sfcgal_full_version(PG_FUNCTION_ARGS);
#endif
Datum sfcgal_from_ewkt(PG_FUNCTION_ARGS);
Datum sfcgal_area3D(PG_FUNCTION_ARGS);
Datum sfcgal_intersection3D(PG_FUNCTION_ARGS);
Datum sfcgal_difference3D(PG_FUNCTION_ARGS);
Datum sfcgal_union3D(PG_FUNCTION_ARGS);
Datum sfcgal_volume(PG_FUNCTION_ARGS);
Datum sfcgal_extrude(PG_FUNCTION_ARGS);
Datum sfcgal_straight_skeleton(PG_FUNCTION_ARGS);
Datum sfcgal_approximate_medial_axis(PG_FUNCTION_ARGS);
Datum sfcgal_is_planar(PG_FUNCTION_ARGS);
Datum sfcgal_orientation(PG_FUNCTION_ARGS);
Datum sfcgal_force_lhr(PG_FUNCTION_ARGS);
Datum ST_ConstrainedDelaunayTriangles(PG_FUNCTION_ARGS);
Datum sfcgal_tesselate(PG_FUNCTION_ARGS);
Datum sfcgal_minkowski_sum(PG_FUNCTION_ARGS);
Datum sfcgal_make_solid(PG_FUNCTION_ARGS);
Datum sfcgal_is_solid(PG_FUNCTION_ARGS);
Datum postgis_sfcgal_noop(PG_FUNCTION_ARGS);
Datum sfcgal_convexhull3D(PG_FUNCTION_ARGS);
Datum sfcgal_alphashape(PG_FUNCTION_ARGS);
Datum sfcgal_optimalalphashape(PG_FUNCTION_ARGS);
GSERIALIZED *geometry_serialize(LWGEOM *lwgeom);
char *text_to_cstring(const text *textptr);
static int __sfcgal_init = 0;
void
sfcgal_postgis_init(void)
{
if (!__sfcgal_init)
{
sfcgal_init();
sfcgal_set_error_handlers((sfcgal_error_handler_t)(void *)lwpgnotice,
(sfcgal_error_handler_t)(void *)lwpgerror);
sfcgal_set_alloc_handlers(lwalloc, lwfree);
__sfcgal_init = 1;
}
}
/* Conversion from GSERIALIZED* to SFCGAL::Geometry */
sfcgal_geometry_t *
POSTGIS2SFCGALGeometry(GSERIALIZED *pglwgeom)
{
sfcgal_geometry_t *g;
LWGEOM *lwgeom = lwgeom_from_gserialized(pglwgeom);
if (!lwgeom)
lwpgerror("POSTGIS2SFCGALGeometry: Unable to deserialize input");
g = LWGEOM2SFCGAL(lwgeom);
lwgeom_free(lwgeom);
return g;
}
/* Conversion from GSERIALIZED* to SFCGAL::PreparedGeometry */
sfcgal_prepared_geometry_t *
POSTGIS2SFCGALPreparedGeometry(GSERIALIZED *pglwgeom)
{
sfcgal_geometry_t *g;
LWGEOM *lwgeom = lwgeom_from_gserialized(pglwgeom);
if (!lwgeom)
lwpgerror("POSTGIS2SFCGALPreparedGeometry: Unable to deserialize input");
g = LWGEOM2SFCGAL(lwgeom);
lwgeom_free(lwgeom);
return sfcgal_prepared_geometry_create_from_geometry(g, gserialized_get_srid(pglwgeom));
}
/* Conversion from SFCGAL::Geometry to GSERIALIZED */
GSERIALIZED *
SFCGALGeometry2POSTGIS(const sfcgal_geometry_t *geom, int force3D, int32_t SRID)
{
GSERIALIZED *result;
LWGEOM *lwgeom = SFCGAL2LWGEOM(geom, force3D, SRID);
if (lwgeom_needs_bbox(lwgeom) == LW_TRUE)
lwgeom_add_bbox(lwgeom);
result = geometry_serialize(lwgeom);
lwgeom_free(lwgeom);
return result;
}
/* Conversion from SFCGAL::PreparedGeometry to GSERIALIZED */
GSERIALIZED *
SFCGALPreparedGeometry2POSTGIS(const sfcgal_prepared_geometry_t *geom, int force3D)
{
return SFCGALGeometry2POSTGIS(
sfcgal_prepared_geometry_geometry(geom), force3D, sfcgal_prepared_geometry_srid(geom));
}
/* Conversion from EWKT to GSERIALIZED */
PG_FUNCTION_INFO_V1(sfcgal_from_ewkt);
Datum sfcgal_from_ewkt(PG_FUNCTION_ARGS)
{
GSERIALIZED *result;
sfcgal_prepared_geometry_t *g;
text *wkttext = PG_GETARG_TEXT_P(0);
char *cstring = text_to_cstring(wkttext);
sfcgal_postgis_init();
g = sfcgal_io_read_ewkt(cstring, strlen(cstring));
result = SFCGALPreparedGeometry2POSTGIS(g, 0);
sfcgal_prepared_geometry_delete(g);
PG_RETURN_POINTER(result);
}
PG_FUNCTION_INFO_V1(sfcgal_area3D);
Datum sfcgal_area3D(PG_FUNCTION_ARGS)
{
GSERIALIZED *input;
sfcgal_geometry_t *geom;
double result;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
geom = POSTGIS2SFCGALGeometry(input);
result = sfcgal_geometry_area_3d(geom);
sfcgal_geometry_delete(geom);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_FLOAT8(result);
}
PG_FUNCTION_INFO_V1(sfcgal_is_planar);
Datum sfcgal_is_planar(PG_FUNCTION_ARGS)
{
GSERIALIZED *input;
sfcgal_geometry_t *geom;
int result;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
geom = POSTGIS2SFCGALGeometry(input);
result = sfcgal_geometry_is_planar(geom);
sfcgal_geometry_delete(geom);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(sfcgal_orientation);
Datum sfcgal_orientation(PG_FUNCTION_ARGS)
{
GSERIALIZED *input;
sfcgal_geometry_t *geom;
int result;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
geom = POSTGIS2SFCGALGeometry(input);
result = sfcgal_geometry_orientation(geom);
sfcgal_geometry_delete(geom);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_INT32(result);
}
PG_FUNCTION_INFO_V1(sfcgal_tesselate);
Datum sfcgal_tesselate(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_tesselate(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(ST_ConstrainedDelaunayTriangles);
Datum ST_ConstrainedDelaunayTriangles(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_triangulate_2dz(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_force_lhr);
Datum sfcgal_force_lhr(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_force_lhr(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_straight_skeleton);
Datum sfcgal_straight_skeleton(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_straight_skeleton(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_approximate_medial_axis);
Datum sfcgal_approximate_medial_axis(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_approximate_medial_axis(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_intersection3D);
Datum sfcgal_intersection3D(PG_FUNCTION_ARGS)
{
GSERIALIZED *input0, *input1, *output;
sfcgal_geometry_t *geom0, *geom1;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input0 = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input0);
input1 = PG_GETARG_GSERIALIZED_P(1);
geom0 = POSTGIS2SFCGALGeometry(input0);
PG_FREE_IF_COPY(input0, 0);
geom1 = POSTGIS2SFCGALGeometry(input1);
PG_FREE_IF_COPY(input1, 1);
result = sfcgal_geometry_intersection_3d(geom0, geom1);
sfcgal_geometry_delete(geom0);
sfcgal_geometry_delete(geom1);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_difference3D);
Datum sfcgal_difference3D(PG_FUNCTION_ARGS)
{
GSERIALIZED *input0, *input1, *output;
sfcgal_geometry_t *geom0, *geom1;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input0 = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
srid = gserialized_get_srid(input0);
input1 = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
geom0 = POSTGIS2SFCGALGeometry(input0);
PG_FREE_IF_COPY(input0, 0);
geom1 = POSTGIS2SFCGALGeometry(input1);
PG_FREE_IF_COPY(input1, 1);
result = sfcgal_geometry_difference_3d(geom0, geom1);
sfcgal_geometry_delete(geom0);
sfcgal_geometry_delete(geom1);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_union3D);
Datum sfcgal_union3D(PG_FUNCTION_ARGS)
{
GSERIALIZED *input0, *input1, *output;
sfcgal_geometry_t *geom0, *geom1;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input0 = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
srid = gserialized_get_srid(input0);
input1 = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
geom0 = POSTGIS2SFCGALGeometry(input0);
PG_FREE_IF_COPY(input0, 0);
geom1 = POSTGIS2SFCGALGeometry(input1);
PG_FREE_IF_COPY(input1, 1);
result = sfcgal_geometry_union_3d(geom0, geom1);
sfcgal_geometry_delete(geom0);
sfcgal_geometry_delete(geom1);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_volume);
Datum sfcgal_volume(PG_FUNCTION_ARGS)
{
GSERIALIZED *input;
sfcgal_geometry_t *geom;
double result;
sfcgal_postgis_init();
input = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
geom = POSTGIS2SFCGALGeometry(input);
result = sfcgal_geometry_volume(geom);
sfcgal_geometry_delete(geom);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_FLOAT8(result);
}
PG_FUNCTION_INFO_V1(sfcgal_minkowski_sum);
Datum sfcgal_minkowski_sum(PG_FUNCTION_ARGS)
{
GSERIALIZED *input0, *input1, *output;
sfcgal_geometry_t *geom0, *geom1;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input0 = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input0);
input1 = PG_GETARG_GSERIALIZED_P(1);
geom0 = POSTGIS2SFCGALGeometry(input0);
PG_FREE_IF_COPY(input0, 0);
geom1 = POSTGIS2SFCGALGeometry(input1);
PG_FREE_IF_COPY(input1, 1);
result = sfcgal_geometry_minkowski_sum(geom0, geom1);
sfcgal_geometry_delete(geom0);
sfcgal_geometry_delete(geom1);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_extrude);
Datum sfcgal_extrude(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
double dx, dy, dz;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
dx = PG_GETARG_FLOAT8(1);
dy = PG_GETARG_FLOAT8(2);
dz = PG_GETARG_FLOAT8(3);
result = sfcgal_geometry_extrude(geom, dx, dy, dz);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(postgis_sfcgal_version);
Datum postgis_sfcgal_version(PG_FUNCTION_ARGS)
{
const char *ver = lwgeom_sfcgal_version();
text *result = cstring_to_text(ver);
PG_RETURN_POINTER(result);
}
#if POSTGIS_SFCGAL_VERSION >= 10400
PG_FUNCTION_INFO_V1(postgis_sfcgal_full_version);
Datum postgis_sfcgal_full_version(PG_FUNCTION_ARGS)
{
const char *ver = lwgeom_sfcgal_full_version();
text *result = cstring_to_text(ver);
PG_RETURN_POINTER(result);
}
#endif
PG_FUNCTION_INFO_V1(sfcgal_is_solid);
Datum sfcgal_is_solid(PG_FUNCTION_ARGS)
{
int result;
GSERIALIZED *input = PG_GETARG_GSERIALIZED_P(0);
LWGEOM *lwgeom = lwgeom_from_gserialized(input);
PG_FREE_IF_COPY(input, 0);
if (!lwgeom)
elog(ERROR, "sfcgal_is_solid: Unable to deserialize input");
result = lwgeom_is_solid(lwgeom);
lwgeom_free(lwgeom);
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(sfcgal_make_solid);
Datum sfcgal_make_solid(PG_FUNCTION_ARGS)
{
GSERIALIZED *output;
GSERIALIZED *input = PG_GETARG_GSERIALIZED_P(0);
LWGEOM *lwgeom = lwgeom_from_gserialized(input);
if (!lwgeom)
elog(ERROR, "sfcgal_make_solid: Unable to deserialize input");
FLAGS_SET_SOLID(lwgeom->flags, 1);
output = geometry_serialize(lwgeom);
lwgeom_free(lwgeom);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(postgis_sfcgal_noop);
Datum postgis_sfcgal_noop(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
LWGEOM *geom, *result;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
geom = lwgeom_from_gserialized(input);
if (!geom)
elog(ERROR, "sfcgal_noop: Unable to deserialize input");
result = lwgeom_sfcgal_noop(geom);
lwgeom_free(geom);
if (!result)
elog(ERROR, "sfcgal_noop: Unable to deserialize lwgeom");
output = geometry_serialize(result);
PG_FREE_IF_COPY(input, 0);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_convexhull3D);
Datum sfcgal_convexhull3D(PG_FUNCTION_ARGS)
{
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
result = sfcgal_geometry_convexhull_3d(geom);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
}
PG_FUNCTION_INFO_V1(sfcgal_alphashape);
Datum sfcgal_alphashape(PG_FUNCTION_ARGS)
{
#if POSTGIS_SFCGAL_VERSION < 10401
lwpgerror("The SFCGAL version this PostGIS binary "
"was compiled against (%d) doesn't support "
"'sfcgal_geometry_alpha_shapes' function (1.4.1+ required)",
POSTGIS_SFCGAL_VERSION);
PG_RETURN_NULL();
#else /* POSTGIS_SFCGAL_VERSION >= 10401 */
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
double alpha;
bool allow_holes;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
alpha = PG_GETARG_FLOAT8(1);
allow_holes = PG_GETARG_BOOL(2);
result = sfcgal_geometry_alpha_shapes(geom, alpha, allow_holes);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
#endif
}
PG_FUNCTION_INFO_V1(sfcgal_optimalalphashape);
Datum sfcgal_optimalalphashape(PG_FUNCTION_ARGS)
{
#if POSTGIS_SFCGAL_VERSION < 10401
lwpgerror("The SFCGAL version this PostGIS binary "
"was compiled against (%d) doesn't support "
"'sfcgal_geometry_optimal_alpha_shapes' function (1.4.1+ required)",
POSTGIS_SFCGAL_VERSION);
PG_RETURN_NULL();
#else /* POSTGIS_SFCGAL_VERSION >= 10401 */
GSERIALIZED *input, *output;
sfcgal_geometry_t *geom;
sfcgal_geometry_t *result;
bool allow_holes;
size_t nb_components;
srid_t srid;
sfcgal_postgis_init();
input = PG_GETARG_GSERIALIZED_P(0);
srid = gserialized_get_srid(input);
geom = POSTGIS2SFCGALGeometry(input);
PG_FREE_IF_COPY(input, 0);
allow_holes = PG_GETARG_BOOL(1);
nb_components = (size_t)PG_GETARG_INT32(2);
result = sfcgal_geometry_optimal_alpha_shapes(geom, allow_holes, nb_components);
sfcgal_geometry_delete(geom);
output = SFCGALGeometry2POSTGIS(result, 0, srid);
sfcgal_geometry_delete(result);
PG_RETURN_POINTER(output);
#endif
}
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