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LUCENE-7185: make an empty grid the simple way

This commit is contained in:
Robert Muir 2016-04-06 21:48:33 -04:00
parent c2289de3c7
commit b59ace99e4
1 changed files with 11 additions and 5 deletions
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16
lucene/sandbox/src/java/org/apache/lucene/document/LatLonGrid.java
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@ -74,11 +74,17 @@ final class LatLonGrid {
}
long latitudeRange = maxLat - (long) minLat;
long longitudeRange = maxLon - (long) minLon;
// we spill over the edge of the bounding box in each direction a bit,
// but it prevents edge case bugs.
latPerCell = latitudeRange / (GRID_SIZE - 1);
lonPerCell = longitudeRange / (GRID_SIZE - 1);
fill(polygons, 0, GRID_SIZE, 0, GRID_SIZE);
if (latitudeRange < GRID_SIZE || longitudeRange < GRID_SIZE) {
// don't complicate fill right now if you pass e.g. emptyish stuff: make an "empty grid"
latPerCell = lonPerCell = Long.MAX_VALUE;
} else {
// we spill over the edge of the bounding box in each direction a bit,
// but it prevents edge case bugs.
latPerCell = latitudeRange / (GRID_SIZE - 1);
lonPerCell = longitudeRange / (GRID_SIZE - 1);
fill(polygons, 0, GRID_SIZE, 0, GRID_SIZE);
}
}
/** fills a 2D range of grid cells [minLatIndex .. maxLatIndex) X [minLonIndex .. maxLonIndex) */