PostGIS  2.3.8dev-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 1421 of file ptarray.c.

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

Referenced by lwgeom_longitude_shift().

1422 {
1423  int i;
1424  double x;
1425 
1426  for (i=0; i<pa->npoints; i++)
1427  {
1428  memcpy(&x, getPoint_internal(pa, i), sizeof(double));
1429  if ( x < 0 ) x+= 360;
1430  else if ( x > 180 ) x -= 360;
1431  memcpy(getPoint_internal(pa, i), &x, sizeof(double));
1432  }
1433 }
int npoints
Definition: liblwgeom.h:370
uint8_t * getPoint_internal(const POINTARRAY *pa, int n)
Definition: ptarray.c:1713
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