コード例 #1
0
ファイル: IndexBucket.cs プロジェクト: wangchj/repo-jeff-wang
 /// <summary>
 /// Adds an entry to this index bucket, without making a copy.
 /// </summary>
 /// <param name="entry">An index entry</param>
 public void AddEntry(IndexEntry entry)
 {
     entries.Add(entry);
 }
コード例 #2
0
        private bool Covered(IndexEntry entry)
        {
            foreach (PruningRegion pruneReg in pruneRegs)
            {
                if (pruneReg.Covers(entry.MBR))
                    return true;
            }

            return false;
        }
コード例 #3
0
        private List<PruningRegion> MakePruneRegs(IndexEntry entry)
        {
            int dimension = entry.MBR.Dimensions;
            Orthotope bounds = entry.MBR;
            List<PruningRegion> pruneRegs = new List<PruningRegion>();
            for (int i = 0; i < dimension; i++)
            {
                Point pivot = new Point(dimension);

                for (int j = 0; j < dimension; j++)
                {
                    if (i == j)
                    {
                        if (pref[j] == PrefSpec.Min)
                            pivot[j] = bounds.Max[j];
                        else
                            pivot[j] = bounds.Min[j];
                    }
                    else
                    {
                        if (pref[j] == PrefSpec.Min)
                            pivot[j] = bounds.Min[j];
                        else
                            pivot[j] = bounds.Max[j];
                    }
                }

                PruningRegion pruneReg = new PruningRegion(pivot, pref);

                //Check if the new pruning region is covered
                bool covered = false;
                foreach (PruningRegion p in this.pruneRegs)
                {
                    if (p.Covers(pruneReg))
                    {
                        covered = true;
                        break;
                    }
                }

                if(!covered)
                    pruneRegs.Add(pruneReg);
            }

            return pruneRegs;
        }