PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ ptarray_scale()

void ptarray_scale ( POINTARRAY pa,
const POINT4D factor 
)

Scale a pointarray.

Definition at line 1811 of file ptarray.c.

References getPoint4d_p(), LWDEBUG, POINT4D::m, POINTARRAY::npoints, ptarray_set_point4d(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by lwgeom_scale(), and test_ptarray_scale().

1812 {
1813  int i;
1814  POINT4D p4d;
1815 
1816  LWDEBUG(3, "ptarray_scale start");
1817 
1818  for (i=0; i<pa->npoints; ++i)
1819  {
1820  getPoint4d_p(pa, i, &p4d);
1821  p4d.x *= fact->x;
1822  p4d.y *= fact->y;
1823  p4d.z *= fact->z;
1824  p4d.m *= fact->m;
1825  ptarray_set_point4d(pa, i, &p4d);
1826  }
1827 
1828  LWDEBUG(3, "ptarray_scale end");
1829 
1830 }
void ptarray_set_point4d(POINTARRAY *pa, int n, const POINT4D *p4d)
Definition: lwgeom_api.c:549
double x
Definition: liblwgeom.h:351
double m
Definition: liblwgeom.h:351
int npoints
Definition: liblwgeom.h:370
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:83
double z
Definition: liblwgeom.h:351
double y
Definition: liblwgeom.h:351
int getPoint4d_p(const POINTARRAY *pa, int n, POINT4D *point)
Definition: lwgeom_api.c:244
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