void
SoXipHandlerShape::getHandlerPoints( SoMFVec3f& handlerPoint )
{
SoMFInt32 dummyCoordIndex;
SbBool dummyClosed;
extractGeometries( handlerPoint, dummyCoordIndex, dummyClosed );
}
static StatusWith<double> computeGeoNearDistance(const GeoNearParams& nearParams,
WorkingSetMember* member) {
//
// Generic GeoNear distance computation
// Distances are computed by projecting the stored geometry into the query CRS, and
// computing distance in that CRS.
//
// Must have an object in order to get geometry out of it.
invariant(member->hasObj());
CRS queryCRS = nearParams.nearQuery.centroid.crs;
// Extract all the geometries out of this document for the near query
OwnedPointerVector<StoredGeometry> geometriesOwned;
vector<StoredGeometry*>& geometries = geometriesOwned.mutableVector();
extractGeometries(member->obj, nearParams.nearQuery.field, &geometries);
// Compute the minimum distance of all the geometries in the document
double minDistance = -1;
BSONObj minDistanceObj;
for (vector<StoredGeometry*>::iterator it = geometries.begin(); it != geometries.end();
++it) {
StoredGeometry& stored = **it;
// NOTE: A stored document with STRICT_SPHERE CRS is treated as a malformed document
// and ignored. Since GeoNear requires an index, there's no stored STRICT_SPHERE shape.
// So we don't check it here.
// NOTE: For now, we're sure that if we get this far in the query we'll have an
// appropriate index which validates the type of geometry we're pulling back here.
// TODO: It may make sense to change our semantics and, by default, only return
// shapes in the same CRS from $geoNear.
if (!stored.geometry.supportsProject(queryCRS))
continue;
stored.geometry.projectInto(queryCRS);
double nextDistance = stored.geometry.minDistance(nearParams.nearQuery.centroid);
if (minDistance < 0 || nextDistance < minDistance) {
minDistance = nextDistance;
minDistanceObj = stored.element.Obj();
}
}
if (minDistance < 0) {
// No distance to report
return StatusWith<double>(-1);
}
if (nearParams.addDistMeta) {
if (nearParams.nearQuery.unitsAreRadians) {
// Hack for nearSphere
// TODO: Remove nearSphere?
invariant(SPHERE == queryCRS);
member->addComputed(new GeoDistanceComputedData(minDistance
/ kRadiusOfEarthInMeters));
}
else {
member->addComputed(new GeoDistanceComputedData(minDistance));
}
}
if (nearParams.addPointMeta) {
member->addComputed(new GeoNearPointComputedData(minDistanceObj));
}
return StatusWith<double>(minDistance);
}
