PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ ptarray_longitude_shift()

void ptarray_longitude_shift ( POINTARRAY pa)

Longitude shift for a pointarray.

Y remains the same X is converted: from -180..180 to 0..360 from 0..360 to -180..180 X < 0 becomes X + 360 X > 180 becomes X - 360

Definition at line 1423 of file ptarray.c.

1424 {
1425  uint32_t i;
1426  double x;
1427 
1428  for (i=0; i<pa->npoints; i++)
1429  {
1430  memcpy(&x, getPoint_internal(pa, i), sizeof(double));
1431  if ( x < 0 ) x+= 360;
1432  else if ( x > 180 ) x -= 360;
1433  memcpy(getPoint_internal(pa, i), &x, sizeof(double));
1434  }
1435 }
static uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: lwinline.h:77
uint32_t npoints
Definition: liblwgeom.h:441

References getPoint_internal(), POINTARRAY::npoints, and pixval::x.

Referenced by lwgeom_longitude_shift().

Here is the call graph for this function:
Here is the caller graph for this function: