PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lw_dist2d_ptarrayarc_ptarrayarc()

int lw_dist2d_ptarrayarc_ptarrayarc ( const POINTARRAY pa,
const POINTARRAY pb,
DISTPTS dl 
)

Test each arc of pa against each arc of pb for distance.

Definition at line 1289 of file measures.c.

1290 {
1291  uint32_t t, u;
1292  const POINT2D *A1;
1293  const POINT2D *A2;
1294  const POINT2D *A3;
1295  const POINT2D *B1;
1296  const POINT2D *B2;
1297  const POINT2D *B3;
1298  int twist = dl->twisted;
1299 
1300  LWDEBUGF(2, "lw_dist2d_ptarrayarc_ptarrayarc called (points: %d-%d)", pa->npoints, pb->npoints);
1301 
1302  if (dl->mode == DIST_MAX)
1303  {
1304  lwerror("lw_dist2d_ptarrayarc_ptarrayarc does not currently support DIST_MAX mode");
1305  return LW_FALSE;
1306  }
1307  else
1308  {
1309  A1 = getPoint2d_cp(pa, 0);
1310  for (t = 1; t < pa->npoints; t += 2) /* For each segment in pa */
1311  {
1312  A2 = getPoint2d_cp(pa, t);
1313  A3 = getPoint2d_cp(pa, t + 1);
1314  B1 = getPoint2d_cp(pb, 0);
1315  for (u = 1; u < pb->npoints; u += 2) /* For each arc in pb */
1316  {
1317  B2 = getPoint2d_cp(pb, u);
1318  B3 = getPoint2d_cp(pb, u + 1);
1319  dl->twisted = twist;
1320 
1321  lw_dist2d_arc_arc(A1, A2, A3, B1, B2, B3, dl);
1322 
1323  /* If we've found a distance within tolerance, we're done */
1324  if (dl->distance <= dl->tolerance && dl->mode == DIST_MIN)
1325  return LW_TRUE;
1326 
1327  B1 = B3;
1328  }
1329  A1 = A3;
1330  }
1331  }
1332  return LW_TRUE;
1333 }
#define LW_FALSE
Definition: liblwgeom.h:108
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:107
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
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_arc_arc(const POINT2D *A1, const POINT2D *A2, const POINT2D *A3, const POINT2D *B1, const POINT2D *B2, const POINT2D *B3, DISTPTS *dl)
Definition: measures.c:1545
#define DIST_MIN
Definition: measures.h:44
#define DIST_MAX
Definition: measures.h:43
int twisted
Definition: measures.h:55
double tolerance
Definition: measures.h:56
int mode
Definition: measures.h:54
double distance
Definition: measures.h:51
uint32_t npoints
Definition: liblwgeom.h:441

References DIST_MAX, DIST_MIN, DISTPTS::distance, getPoint2d_cp(), lw_dist2d_arc_arc(), LW_FALSE, LW_TRUE, LWDEBUGF, lwerror(), DISTPTS::mode, POINTARRAY::npoints, DISTPTS::tolerance, and DISTPTS::twisted.

Referenced by lw_dist2d_circstring_circstring().

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