PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lw_dist2d_line_tri()

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

Definition at line 712 of file measures.c.

713 {
714  const POINT2D *pt = getPoint2d_cp(line->points, 0);
715  /* Is there a point inside triangle? */
716  if (dl->mode == DIST_MIN && ptarray_contains_point(tri->points, pt) != LW_OUTSIDE)
717  {
718  lw_dist2d_distpts_set(dl, 0.0, pt, pt);
719  return LW_TRUE;
720  }
721 
722  return lw_dist2d_ptarray_ptarray(line->points, tri->points, dl);
723 }
LW_TRUE
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:107
ptarray_contains_point
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:740
LW_OUTSIDE
#define LW_OUTSIDE
Definition: liblwgeom_internal.h:154
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:101
lw_dist2d_distpts_set
static void lw_dist2d_distpts_set(DISTPTS *dl, double distance, const POINT2D *p1, const POINT2D *p2)
Definition: measures.c:78
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:1186
DIST_MIN
#define DIST_MIN
Definition: measures.h:44
DISTPTS::mode
int mode
Definition: measures.h:54
LWLINE::points
POINTARRAY * points
Definition: liblwgeom.h:497
LWTRIANGLE::points
POINTARRAY * points
Definition: liblwgeom.h:509

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

Referenced by lw_dist2d_distribute_bruteforce().

Here is the call graph for this function:
Here is the caller graph for this function: