PostGIS  2.2.7dev-r@@SVN_REVISION@@
static LWMPOINT* lwmpoint_locate_along ( const LWMPOINT lwin,
double  m,
double  offset 
)
static

Definition at line 182 of file lwlinearreferencing.c.

References FP_EQUALS, LWMPOINT::geoms, lwgeom_get_srid(), lwgeom_has_m(), lwgeom_has_z(), lwmpoint_add_lwpoint(), lwmpoint_as_lwgeom(), lwmpoint_construct_empty(), lwpoint_clone(), lwpoint_get_m(), and LWMPOINT::ngeoms.

Referenced by lwgeom_locate_along().

183 {
184  LWGEOM *lwg = lwmpoint_as_lwgeom(lwin);
185  LWMPOINT *lwout = NULL;
186  int i;
187 
188  /* Construct return */
190 
191  for ( i = 0; i < lwin->ngeoms; i++ )
192  {
193  double point_m = lwpoint_get_m(lwin->geoms[i]);
194  if ( FP_EQUALS(m, point_m) )
195  {
196  lwmpoint_add_lwpoint(lwout, lwpoint_clone(lwin->geoms[i]));
197  }
198  }
199 
200  return lwout;
201 }
int32_t lwgeom_get_srid(const LWGEOM *geom)
Return SRID number.
Definition: lwgeom.c:822
int lwgeom_has_z(const LWGEOM *geom)
Return LW_TRUE if geometry has Z ordinates.
Definition: lwgeom.c:836
LWPOINT * lwpoint_clone(const LWPOINT *lwgeom)
Definition: lwpoint.c:208
LWPOINT ** geoms
Definition: liblwgeom.h:454
LWMPOINT * lwmpoint_construct_empty(int srid, char hasz, char hasm)
Definition: lwmpoint.c:26
double lwpoint_get_m(const LWPOINT *point)
Definition: lwpoint.c:82
LWMPOINT * lwmpoint_add_lwpoint(LWMPOINT *mobj, const LWPOINT *obj)
Definition: lwmpoint.c:32
#define FP_EQUALS(A, B)
int ngeoms
Definition: liblwgeom.h:452
int lwgeom_has_m(const LWGEOM *geom)
Return LW_TRUE if geometry has M ordinates.
Definition: lwgeom.c:843
LWGEOM * lwmpoint_as_lwgeom(const LWMPOINT *obj)
Definition: lwgeom.c:214

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