PostGIS 3.7.0dev-r@@SVN_REVISION@@
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◆ lw_dist2d_point_tri()

int lw_dist2d_point_tri ( LWPOINT point,
LWTRIANGLE tri,
DISTPTS dl 
)

Definition at line 629 of file measures.c.

630{
631 const POINT2D *pt = getPoint2d_cp(point->point, 0);
632 /* Is point inside triangle? */
633 if (dl->mode == DIST_MIN && ptarray_contains_point(tri->points, pt) != LW_OUTSIDE)
634 {
635 lw_dist2d_distpts_set(dl, 0.0, pt, pt);
636 return LW_TRUE;
637 }
638
639 return lw_dist2d_pt_ptarray(pt, tri->points, dl);
640}
#define LW_TRUE
Return types for functions with status returns.
Definition liblwgeom.h:93
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
#define LW_OUTSIDE
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
static void lw_dist2d_distpts_set(DISTPTS *dl, double distance, const POINT2D *p1, const POINT2D *p2)
Definition measures.c:81
int lw_dist2d_pt_ptarray(const POINT2D *p, POINTARRAY *pa, DISTPTS *dl)
search all the segments of pointarray to see which one is closest to p1 Returns minimum distance betw...
Definition measures.c:1112
#define DIST_MIN
Definition measures.h:44
int mode
Definition measures.h:54
POINTARRAY * point
Definition liblwgeom.h:471
POINTARRAY * points
Definition liblwgeom.h:495

References DIST_MIN, getPoint2d_cp(), lw_dist2d_distpts_set(), lw_dist2d_pt_ptarray(), LW_OUTSIDE, LW_TRUE, DISTPTS::mode, LWPOINT::point, LWTRIANGLE::points, and ptarray_contains_point().

Referenced by lw_dist2d_distribute_bruteforce().

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