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Commit b29f936a authored by Tom Fischer's avatar Tom Fischer
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Fixed a bug in algorithm for determining neighbour cells.

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with 68 additions and 49 deletions
GeoLib/Grid.h
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− 49
View file @ b29f936a
...@@ -207,53 +207,72 @@ public: ...@@ -207,53 +207,72 @@ public:
} }
} else { } else {
// search in all border cells for at least one neighbor // search in all border cells for at least one neighbor
double sqr_min_dist_tmp; double sqr_min_dist_tmp;
POINT* nearest_pnt_tmp(NULL); POINT * nearest_pnt_tmp(NULL);
std::size_t offset(1); std::size_t offset(1);
while (nearest_pnt == NULL) { while (nearest_pnt == NULL) {
std::size_t tmp_coords[3]; std::size_t tmp_coords[3];
for (tmp_coords[0] = coords[0]-offset; tmp_coords[0]<coords[0]+offset; tmp_coords[0]++) { if (coords[0] < offset) {
for (tmp_coords[1] = coords[1]-offset; tmp_coords[1]<coords[1]+offset; tmp_coords[1]++) { tmp_coords[0] = 0;
for (tmp_coords[2] = coords[2]-offset; tmp_coords[2]<coords[2]+offset; tmp_coords[2]++) { } else {
// do not check the origin grid cell twice tmp_coords[0] = coords[0] - offset;
if (!(tmp_coords[0] == coords[0] && tmp_coords[1] == coords[1] && tmp_coords[2] == coords[2])) { }
// check if temporary grid cell coordinates are valid for (; tmp_coords[0] < coords[0] + offset; tmp_coords[0]++) {
if (tmp_coords[0] < _n_steps[0] && tmp_coords[1] < _n_steps[1] && tmp_coords[2] < _n_steps[2]) { if (coords[1] < offset) {
if (calcNearestPointInGridCell(pnt, tmp_coords, sqr_min_dist_tmp, nearest_pnt_tmp)) { tmp_coords[1] = 0;
if (sqr_min_dist_tmp < sqr_min_dist) { } else {
sqr_min_dist = sqr_min_dist_tmp; tmp_coords[1] = coords[1] - offset;
nearest_pnt = nearest_pnt_tmp;
}
}
} // valid grid cell coordinates
} // same element
} // end k
} // end j
} // end i
offset++;
} // end while
} // end else
double len (sqrt(MathLib::sqrDist(pnt, nearest_pnt->getCoords())));
// search all other grid cells within the cube with the edge nodes
std::vector<std::vector<POINT*> const*> vecs_of_pnts;
getPntVecsOfGridCellsIntersectingCube(pnt, len, vecs_of_pnts);
const std::size_t n_vecs(vecs_of_pnts.size());
for (std::size_t j(0); j<n_vecs; j++) {
std::vector<POINT*> const& pnts(*(vecs_of_pnts[j]));
const std::size_t n_pnts(pnts.size());
for (std::size_t k(0); k<n_pnts; k++) {
const double sqr_dist (MathLib::sqrDist(pnt, pnts[k]->getCoords()));
if (sqr_dist < sqr_min_dist) {
sqr_min_dist = sqr_dist;
nearest_pnt = pnts[k];
} }
for (; tmp_coords[1] < coords[1] + offset; tmp_coords[1]++) {
if (coords[2] < offset) {
tmp_coords[2] = 0;
} else {
tmp_coords[2] = coords[2] - offset;
}
for (; tmp_coords[2] < coords[2] + offset; tmp_coords[2]++) {
// do not check the origin grid cell twice
if (!(tmp_coords[0] == coords[0] && tmp_coords[1] == coords[1]
&& tmp_coords[2] == coords[2])) {
// check if temporary grid cell coordinates are valid
if (tmp_coords[0] < _n_steps[0] && tmp_coords[1] < _n_steps[1]
&& tmp_coords[2] < _n_steps[2]) {
if (calcNearestPointInGridCell(pnt, tmp_coords,
sqr_min_dist_tmp,
nearest_pnt_tmp)) {
if (sqr_min_dist_tmp < sqr_min_dist) {
sqr_min_dist = sqr_min_dist_tmp;
nearest_pnt = nearest_pnt_tmp;
}
}
} // valid grid cell coordinates
} // same element
} // end k
} // end j
} // end i
offset++;
} // end while
} // end else
double len (sqrt(MathLib::sqrDist(pnt, nearest_pnt->getCoords())));
// search all other grid cells within the cube with the edge nodes
std::vector<std::vector<POINT*> const*> vecs_of_pnts;
getPntVecsOfGridCellsIntersectingCube(pnt, len, vecs_of_pnts);
const std::size_t n_vecs(vecs_of_pnts.size());
for (std::size_t j(0); j<n_vecs; j++) {
std::vector<POINT*> const& pnts(*(vecs_of_pnts[j]));
const std::size_t n_pnts(pnts.size());
for (std::size_t k(0); k<n_pnts; k++) {
const double sqr_dist (MathLib::sqrDist(pnt, pnts[k]->getCoords()));
if (sqr_dist < sqr_min_dist) {
sqr_min_dist = sqr_dist;
nearest_pnt = pnts[k];
} }
} }
}
return nearest_pnt; return nearest_pnt;
} }
/** /**
...@@ -511,14 +530,14 @@ void Grid<POINT>::getPointCellBorderDistances(double const* const pnt, ...@@ -511,14 +530,14 @@ void Grid<POINT>::getPointCellBorderDistances(double const* const pnt,
double dists[6], double dists[6],
std::size_t const* const coords) const std::size_t const* const coords) const
{ {
dists[0] = (pnt[2] - this->_min_pnt[2] + coords[2] * _step_sizes[2]); // bottom dists[0] = fabs(pnt[2] - this->_min_pnt[2] + coords[2] * _step_sizes[2]); // bottom
dists[5] = (_step_sizes[2] - dists[0]); // top dists[5] = fabs(pnt[2] - this->_min_pnt[2] + (coords[2] + 1) * _step_sizes[2]); // top
dists[1] = (pnt[1] - this->_min_pnt[1] + coords[1] * _step_sizes[1]); // front dists[1] = fabs(pnt[1] - this->_min_pnt[1] + coords[1] * _step_sizes[1]); // front
dists[3] = (_step_sizes[1] - dists[1]); // back dists[3] = fabs(pnt[1] - this->_min_pnt[1] + (coords[1] + 1) * _step_sizes[1]); // back
dists[4] = (pnt[0] - this->_min_pnt[0] + coords[0] * _step_sizes[0]); // left dists[4] = fabs(pnt[0] - this->_min_pnt[0] + coords[0] * _step_sizes[0]); // left
dists[2] = (_step_sizes[0] - dists[4]); // right dists[2] = fabs(pnt[0] - this->_min_pnt[0] + (coords[0] + 1) * _step_sizes[0]); // right
} }
} // end namespace GeoLib } // end namespace GeoLib
......
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