PostGIS  3.4.0dev-r@@SVN_REVISION@@

◆ lw_dist2d_line_tri()

int lw_dist2d_line_tri ( LWLINE line,
LWTRIANGLE tri,
DISTPTS dl 
)

Definition at line 707 of file measures.c.

708 {
709  const POINT2D *pt = getPoint2d_cp(line->points, 0);
710  /* Is there a point inside triangle? */
711  if (dl->mode == DIST_MIN && ptarray_contains_point(tri->points, pt) != LW_OUTSIDE)
712  {
713  dl->distance = 0.0;
714  dl->p1.x = dl->p2.x = pt->x;
715  dl->p1.y = dl->p2.y = pt->y;
716  return LW_TRUE;
717  }
718 
719  return lw_dist2d_ptarray_ptarray(line->points, tri->points, dl);
720 }
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:93
int ptarray_contains_point(const POINTARRAY *pa, const POINT2D *pt)
Return 1 if the point is inside the POINTARRAY, -1 if it is outside, and 0 if it is on the boundary.
Definition: ptarray.c:753
#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:101
int lw_dist2d_ptarray_ptarray(POINTARRAY *l1, POINTARRAY *l2, DISTPTS *dl)
test each segment of l1 against each segment of l2.
Definition: measures.c:1209
#define DIST_MIN
Definition: measures.h:44
POINT2D p1
Definition: measures.h:52
POINT2D p2
Definition: measures.h:53
int mode
Definition: measures.h:54
double distance
Definition: measures.h:51
POINTARRAY * points
Definition: liblwgeom.h:483
POINTARRAY * points
Definition: liblwgeom.h:495
double y
Definition: liblwgeom.h:390
double x
Definition: liblwgeom.h:390

References DIST_MIN, DISTPTS::distance, getPoint2d_cp(), lw_dist2d_ptarray_ptarray(), LW_OUTSIDE, LW_TRUE, DISTPTS::mode, DISTPTS::p1, DISTPTS::p2, LWLINE::points, LWTRIANGLE::points, ptarray_contains_point(), POINT2D::x, and POINT2D::y.

Referenced by lw_dist2d_distribute_bruteforce().

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