PostGIS  2.1.10dev-r@@SVN_REVISION@@
static int lwpolygon_calculate_gbox_geodetic ( const LWPOLY poly,
GBOX gbox 
)
static

Definition at line 2540 of file lwgeodetic.c.

References GBOX::flags, gbox_check_poles(), gbox_duplicate(), gbox_merge(), LW_FAILURE, LW_FALSE, LW_SUCCESS, LW_TRUE, LWPOLY::nrings, ptarray_calculate_gbox_geodetic(), and LWPOLY::rings.

Referenced by lwgeom_calculate_gbox_geodetic().

2541 {
2542  GBOX ringbox;
2543  int i;
2544  int first = LW_TRUE;
2545  assert(poly);
2546  if ( poly->nrings == 0 )
2547  return LW_FAILURE;
2548  ringbox.flags = gbox->flags;
2549  for ( i = 0; i < poly->nrings; i++ )
2550  {
2551  if ( ptarray_calculate_gbox_geodetic(poly->rings[i], &ringbox) == LW_FAILURE )
2552  return LW_FAILURE;
2553  if ( first )
2554  {
2555  gbox_duplicate(&ringbox, gbox);
2556  first = LW_FALSE;
2557  }
2558  else
2559  {
2560  gbox_merge(&ringbox, gbox);
2561  }
2562  }
2563 
2564  /* If the box wraps a poly, push that axis to the absolute min/max as appropriate */
2565  gbox_check_poles(gbox);
2566 
2567  return LW_SUCCESS;
2568 }
void gbox_duplicate(const GBOX *original, GBOX *duplicate)
Copy the values of original GBOX into duplicate.
Definition: g_box.c:369
#define LW_SUCCESS
Definition: liblwgeom.h:55
int gbox_merge(const GBOX *new_box, GBOX *merge_box)
Update the merged GBOX to be large enough to include itself and the new box.
Definition: g_box.c:215
#define LW_FAILURE
Definition: liblwgeom.h:54
#define LW_FALSE
Definition: liblwgeom.h:52
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:51
POINTARRAY ** rings
Definition: liblwgeom.h:413
int nrings
Definition: liblwgeom.h:411
int ptarray_calculate_gbox_geodetic(const POINTARRAY *pa, GBOX *gbox)
Calculate geodetic (x/y/z) box and add values to gbox.
Definition: lwgeodetic.c:2473
uint8_t flags
Definition: liblwgeom.h:247
static int gbox_check_poles(GBOX *gbox)
Check to see if this geocentric gbox is wrapped around a pole.
Definition: lwgeodetic.c:293

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