PostGIS  2.5.0dev-r@@SVN_REVISION@@
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 1409 of file ptarray.c.

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

Referenced by lwgeom_longitude_shift().

1410 {
1411  uint32_t i;
1412  double x;
1413 
1414  for (i=0; i<pa->npoints; i++)
1415  {
1416  memcpy(&x, getPoint_internal(pa, i), sizeof(double));
1417  if ( x < 0 ) x+= 360;
1418  else if ( x > 180 ) x -= 360;
1419  memcpy(getPoint_internal(pa, i), &x, sizeof(double));
1420  }
1421 }
uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: ptarray.c:1743
unsigned int uint32_t
Definition: uthash.h:78
tuple x
Definition: pixval.py:53
uint32_t npoints
Definition: liblwgeom.h:370

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