PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ ptarray_scale()

void ptarray_scale ( POINTARRAY pa,
const POINT4D fact 

WARNING, make sure you send in only 16-member double arrays or obviously things will go pear-shaped fast.

Scale a pointarray.

Definition at line 1983 of file ptarray.c.

1984 {
1985  uint32_t i;
1986  POINT4D p4d;
1987  LWDEBUG(3, "ptarray_scale start");
1988  for (i=0; i<pa->npoints; i++)
1989  {
1990  getPoint4d_p(pa, i, &p4d);
1991  p4d.x *= fact->x;
1992  p4d.y *= fact->y;
1993  p4d.z *= fact->z;
1994  p4d.m *= fact->m;
1995  ptarray_set_point4d(pa, i, &p4d);
1996  }
1997  LWDEBUG(3, "ptarray_scale end");
1998 }
int getPoint4d_p(const POINTARRAY *pa, uint32_t n, POINT4D *point)
Definition: lwgeom_api.c:123
void ptarray_set_point4d(POINTARRAY *pa, uint32_t n, const POINT4D *p4d)
Definition: lwgeom_api.c:435
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:83
double m
Definition: liblwgeom.h:355
double x
Definition: liblwgeom.h:355
double z
Definition: liblwgeom.h:355
double y
Definition: liblwgeom.h:355
uint32_t npoints
Definition: liblwgeom.h:374
unsigned int uint32_t
Definition: uthash.h:78

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().

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