lwgeom.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "liblwgeom_internal.h"
#include "lwgeom_log.h"

Include dependency graph for lwgeom.c:

Go to the source code of this file.

Functions
void	lwgeom_force_clockwise (LWGEOM *lwgeom)
	Force Right-hand-rule on LWGEOM polygons. More...
int	lwgeom_is_clockwise (LWGEOM *lwgeom)
	Check clockwise orientation on LWGEOM polygons. More...
LWGEOM *	lwgeom_reverse (const LWGEOM *geom)
void	lwgeom_reverse_in_place (LWGEOM *geom)
	Reverse vertex order of LWGEOM. More...
LWPOINT *	lwgeom_as_lwpoint (const LWGEOM *lwgeom)
LWLINE *	lwgeom_as_lwline (const LWGEOM *lwgeom)
LWCIRCSTRING *	lwgeom_as_lwcircstring (const LWGEOM *lwgeom)
LWCOMPOUND *	lwgeom_as_lwcompound (const LWGEOM *lwgeom)
LWCURVEPOLY *	lwgeom_as_lwcurvepoly (const LWGEOM *lwgeom)
LWPOLY *	lwgeom_as_lwpoly (const LWGEOM *lwgeom)
LWTRIANGLE *	lwgeom_as_lwtriangle (const LWGEOM *lwgeom)
LWCOLLECTION *	lwgeom_as_lwcollection (const LWGEOM *lwgeom)
LWMPOINT *	lwgeom_as_lwmpoint (const LWGEOM *lwgeom)
LWMLINE *	lwgeom_as_lwmline (const LWGEOM *lwgeom)
LWMPOLY *	lwgeom_as_lwmpoly (const LWGEOM *lwgeom)
LWPSURFACE *	lwgeom_as_lwpsurface (const LWGEOM *lwgeom)
LWTIN *	lwgeom_as_lwtin (const LWGEOM *lwgeom)
LWGEOM *	lwtin_as_lwgeom (const LWTIN *obj)
LWGEOM *	lwpsurface_as_lwgeom (const LWPSURFACE *obj)
LWGEOM *	lwmpoly_as_lwgeom (const LWMPOLY *obj)
LWGEOM *	lwmline_as_lwgeom (const LWMLINE *obj)
LWGEOM *	lwmpoint_as_lwgeom (const LWMPOINT *obj)
LWGEOM *	lwcollection_as_lwgeom (const LWCOLLECTION *obj)
LWGEOM *	lwcircstring_as_lwgeom (const LWCIRCSTRING *obj)
LWGEOM *	lwcurvepoly_as_lwgeom (const LWCURVEPOLY *obj)
LWGEOM *	lwcompound_as_lwgeom (const LWCOMPOUND *obj)
LWGEOM *	lwpoly_as_lwgeom (const LWPOLY *obj)
LWGEOM *	lwtriangle_as_lwgeom (const LWTRIANGLE *obj)
LWGEOM *	lwline_as_lwgeom (const LWLINE *obj)
LWGEOM *	lwpoint_as_lwgeom (const LWPOINT *obj)
uint8_t	lwtype_multitype (uint8_t type)
LWGEOM *	lwgeom_as_multi (const LWGEOM *lwgeom)
	Create a new LWGEOM of the appropriate MULTI* type. More...
LWGEOM *	lwgeom_as_curve (const LWGEOM *lwgeom)
	Create a new LWGEOM of the appropriate CURVE* type. More...
void	lwgeom_release (LWGEOM *lwgeom)
	Free the containing LWGEOM and the associated BOX. More...
LWGEOM *	lwgeom_clone (const LWGEOM *lwgeom)
	Clone LWGEOM object. More...
LWGEOM *	lwgeom_clone_deep (const LWGEOM *lwgeom)
	Deep-clone an LWGEOM object. More...
char *	lwgeom_to_ewkt (const LWGEOM *lwgeom)
	Return an alloced string. More...
char	lwgeom_same (const LWGEOM *lwgeom1, const LWGEOM *lwgeom2)
	geom1 same as geom2 iff More...
int	lwpoint_inside_circle (const LWPOINT *p, double cx, double cy, double rad)
void	lwgeom_drop_bbox (LWGEOM *lwgeom)
	Call this function to drop BBOX and SRID from LWGEOM. More...
void	lwgeom_add_bbox (LWGEOM *lwgeom)
	Ensure there's a box in the LWGEOM. More...
void	lwgeom_refresh_bbox (LWGEOM *lwgeom)
	Drop current bbox and calculate a fresh one. More...
void	lwgeom_add_bbox_deep (LWGEOM *lwgeom, GBOX *gbox)
	Compute a box for geom and all sub-geometries, if not already computed. More...
const GBOX *	lwgeom_get_bbox (const LWGEOM *lwg)
	Get a non-empty geometry bounding box, computing and caching it if not already there. More...
int	lwgeom_calculate_gbox (const LWGEOM *lwgeom, GBOX *gbox)
	Calculate the gbox for this geometry, a cartesian box or geodetic box, depending on how it is flagged. More...
void	lwgeom_drop_srid (LWGEOM *lwgeom)
LWGEOM *	lwgeom_segmentize2d (const LWGEOM *lwgeom, double dist)
LWGEOM *	lwgeom_force_2d (const LWGEOM *geom)
	Strip out the Z/M components of an LWGEOM. More...
LWGEOM *	lwgeom_force_3dz (const LWGEOM *geom)
LWGEOM *	lwgeom_force_3dm (const LWGEOM *geom)
LWGEOM *	lwgeom_force_4d (const LWGEOM *geom)
LWGEOM *	lwgeom_force_dims (const LWGEOM *geom, int hasz, int hasm)
LWGEOM *	lwgeom_force_sfs (LWGEOM *geom, int version)
int32_t	lwgeom_get_srid (const LWGEOM *geom)
	Return SRID number. More...
uint32_t	lwgeom_get_type (const LWGEOM *geom)
	Return LWTYPE number. More...
int	lwgeom_has_z (const LWGEOM *geom)
	Return LW_TRUE if geometry has Z ordinates. More...
int	lwgeom_has_m (const LWGEOM *geom)
	Return LW_TRUE if geometry has M ordinates. More...
int	lwgeom_ndims (const LWGEOM *geom)
	Return the number of dimensions (2, 3, 4) in a geometry. More...
void	lwgeom_set_geodetic (LWGEOM *geom, int value)
	Set the FLAGS geodetic bit on geometry an all sub-geometries and pointlists. More...
void	lwgeom_longitude_shift (LWGEOM *lwgeom)
int	lwgeom_is_closed (const LWGEOM *geom)
	Return true or false depending on whether a geometry is a linear feature that closes on itself. More...
int	lwgeom_is_collection (const LWGEOM *geom)
	Determine whether a LWGEOM can contain sub-geometries or not. More...
int	lwtype_is_collection (uint8_t type)
	Return TRUE if the geometry may contain sub-geometries, i.e. More...
uint32_t	lwtype_get_collectiontype (uint8_t type)
	Given an lwtype number, what homogeneous collection can hold it? More...
void	lwgeom_free (LWGEOM *lwgeom)
int	lwgeom_needs_bbox (const LWGEOM *geom)
	Check whether or not a lwgeom is big enough to warrant a bounding box. More...
uint32_t	lwgeom_count_vertices (const LWGEOM *geom)
	Count points in an LWGEOM. More...
int	lwgeom_dimension (const LWGEOM *geom)
	For an LWGEOM, returns 0 for points, 1 for lines, 2 for polygons, 3 for volume, and the max dimension of a collection. More...
uint32_t	lwgeom_count_rings (const LWGEOM *geom)
	Count rings in an LWGEOM. More...
int	lwgeom_is_empty (const LWGEOM *geom)
	Return true or false depending on whether a geometry is an "empty" geometry (no vertices members) More...
int	lwgeom_has_srid (const LWGEOM *geom)
	Return true or false depending on whether a geometry has a valid SRID set. More...
static int	lwcollection_dimensionality (const LWCOLLECTION *col)
int	lwgeom_dimensionality (const LWGEOM *geom)
	Return the dimensionality (relating to point/line/poly) of an lwgeom. More...
LWGEOM *	lwgeom_remove_repeated_points (const LWGEOM *in, double tolerance)
void	lwgeom_swap_ordinates (LWGEOM *in, LWORD o1, LWORD o2)
	Swap ordinate values in every vertex of the geometry. More...
void	lwgeom_set_srid (LWGEOM *geom, int32_t srid)
void	lwgeom_remove_repeated_points_in_place (LWGEOM *geom, double tolerance)
void	lwgeom_simplify_in_place (LWGEOM *geom, double epsilon, int preserve_collapsed)
LWGEOM *	lwgeom_simplify (const LWGEOM *igeom, double dist, int preserve_collapsed)
double	lwgeom_area (const LWGEOM *geom)
double	lwgeom_perimeter (const LWGEOM *geom)
double	lwgeom_perimeter_2d (const LWGEOM *geom)
double	lwgeom_length (const LWGEOM *geom)
double	lwgeom_length_2d (const LWGEOM *geom)
void	lwgeom_affine (LWGEOM *geom, const AFFINE *affine)
void	lwgeom_scale (LWGEOM *geom, const POINT4D *factor)
LWGEOM *	lwgeom_construct_empty (uint8_t type, int srid, char hasz, char hasm)
int	lwgeom_startpoint (const LWGEOM *lwgeom, POINT4D *pt)
void	lwgeom_grid_in_place (LWGEOM *geom, const gridspec *grid)
LWGEOM *	lwgeom_grid (const LWGEOM *lwgeom, const gridspec *grid)
static int	lwgeom_subdivide_recursive (const LWGEOM *geom, uint8_t dimension, uint32_t maxvertices, uint32_t depth, LWCOLLECTION *col)
LWCOLLECTION *	lwgeom_subdivide (const LWGEOM *geom, uint32_t maxvertices)
int	lwgeom_is_trajectory (const LWGEOM *geom)
	Return LW_TRUE or LW_FALSE depending on whether or not a geometry is a linestring with measure value growing from start to end vertex. More...
static uint8_t	bits_for_precision (int32_t significant_digits)
static double	trim_preserve_decimal_digits (double d, int32_t decimal_digits)
void	lwgeom_trim_bits_in_place (LWGEOM *geom, int32_t prec_x, int32_t prec_y, int32_t prec_z, int32_t prec_m)
	Trim the bits of an LWGEOM in place, to optimize it for compression. More...

Variables
uint8_t	MULTITYPE [NUMTYPES]
	Look-up for the correct MULTI* type promotion for singleton types. More...