PostGIS  2.2.8dev-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 1414 of file ptarray.c.

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

Referenced by lwgeom_longitude_shift().

1415 {
1416  int i;
1417  double x;
1418 
1419  for (i=0; i<pa->npoints; i++)
1420  {
1421  memcpy(&x, getPoint_internal(pa, i), sizeof(double));
1422  if ( x < 0 ) x+= 360;
1423  else if ( x > 180 ) x -= 360;
1424  memcpy(getPoint_internal(pa, i), &x, sizeof(double));
1425  }
1426 }
int npoints
Definition: liblwgeom.h:355
uint8_t * getPoint_internal(const POINTARRAY *pa, int n)
Definition: ptarray.c:1706
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