PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ circstring_from_pa()

static LWGEOM* circstring_from_pa ( const POINTARRAY *  pa,
int  srid,
int  start,
int  end 
)
static

Definition at line 858 of file lwstroke.c.

859 {
860 
861  POINT4D p0, p1, p2;
862  POINTARRAY *pao = ptarray_construct(ptarray_has_z(pa), ptarray_has_m(pa), 3);
863  LWDEBUGF(4, "srid=%d, start=%d, end=%d", srid, start, end);
864  getPoint4d_p(pa, start, &p0);
865  ptarray_set_point4d(pao, 0, &p0);
866  getPoint4d_p(pa, (start+end+1)/2, &p1);
867  ptarray_set_point4d(pao, 1, &p1);
868  getPoint4d_p(pa, end+1, &p2);
869  ptarray_set_point4d(pao, 2, &p2);
870  return lwcircstring_as_lwgeom(lwcircstring_construct(srid, NULL, pao));
871 }
ptarray_construct
POINTARRAY * ptarray_construct(char hasz, char hasm, uint32_t npoints)
Construct an empty pointarray, allocating storage and setting the npoints, but not filling in any inf...
Definition: ptarray.c:62
lwcircstring_construct
LWCIRCSTRING * lwcircstring_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwcircstring.c:50
getPoint4d_p
int getPoint4d_p(const POINTARRAY *pa, uint32_t n, POINT4D *point)
Definition: lwgeom_api.c:123
lwcircstring_as_lwgeom
LWGEOM * lwcircstring_as_lwgeom(const LWCIRCSTRING *obj)
Definition: lwgeom.c:305
ptarray_set_point4d
void ptarray_set_point4d(POINTARRAY *pa, uint32_t n, const POINT4D *p4d)
Definition: lwgeom_api.c:435
ptarray_has_z
int ptarray_has_z(const POINTARRAY *pa)
Definition: ptarray.c:36
ptarray_has_m
int ptarray_has_m(const POINTARRAY *pa)
Definition: ptarray.c:43
LWDEBUGF
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88

References getPoint4d_p(), lwcircstring_as_lwgeom(), lwcircstring_construct(), LWDEBUGF, ptarray_construct(), ptarray_has_m(), ptarray_has_z(), and ptarray_set_point4d().

Referenced by geom_from_pa().

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