PostGIS  3.6.1dev-r@@SVN_REVISION@@

◆ lw_dist2d_tri_tri()

int lw_dist2d_tri_tri ( LWTRIANGLE *  tri1,
LWTRIANGLE *  tri2,
DISTPTS *  dl 
)

Definition at line 813 of file measures.c.

814 {
815  POINTARRAY *pa1 = tri1->points;
816  POINTARRAY *pa2 = tri2->points;
817  const POINT2D *pt = getPoint2d_cp(pa2, 0);
818  if (dl->mode == DIST_MIN && ptarray_contains_point(pa1, pt) != LW_OUTSIDE)
819  {
820  lw_dist2d_distpts_set(dl, 0.0, pt, pt);
821  return LW_TRUE;
822  }
823 
824  pt = getPoint2d_cp(pa1, 0);
825  if (dl->mode == DIST_MIN && ptarray_contains_point(pa2, pt) != LW_OUTSIDE)
826  {
827  lw_dist2d_distpts_set(dl, 0.0, pt, pt);
828  return LW_TRUE;
829  }
830 
831  return lw_dist2d_ptarray_ptarray(pa1, pa2, dl);
832 }
LW_TRUE
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:93
ptarray_contains_point
int ptarray_contains_point(const POINTARRAY *pa, const POINT2D *pt)
The following is based on the "Fast Winding Number Inclusion of a Point in a Polygon" algorithm by Da...
Definition: ptarray.c:755
LW_OUTSIDE
#define LW_OUTSIDE
Definition: liblwgeom_internal.h:158
getPoint2d_cp
static const POINT2D * getPoint2d_cp(const POINTARRAY *pa, uint32_t n)
Returns a POINT2D pointer into the POINTARRAY serialized_ptlist, suitable for reading from.
Definition: lwinline.h:97
lw_dist2d_distpts_set
static void lw_dist2d_distpts_set(DISTPTS *dl, double distance, const POINT2D *p1, const POINT2D *p2)
Definition: measures.c:81
lw_dist2d_ptarray_ptarray
int lw_dist2d_ptarray_ptarray(POINTARRAY *l1, POINTARRAY *l2, DISTPTS *dl)
test each segment of l1 against each segment of l2.
Definition: measures.c:1197
DIST_MIN
#define DIST_MIN
Definition: measures.h:44
DISTPTS::mode
int mode
Definition: measures.h:54
LWTRIANGLE::points
POINTARRAY * points
Definition: liblwgeom.h:495

References DIST_MIN, getPoint2d_cp(), lw_dist2d_distpts_set(), lw_dist2d_ptarray_ptarray(), LW_OUTSIDE, LW_TRUE, DISTPTS::mode, LWTRIANGLE::points, and ptarray_contains_point().

Referenced by lw_dist2d_distribute_bruteforce().

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