C# Shape.GetCenter方法代码示例

        public AbstractField[] CreateIndexableFields(Shape shape, double distErr)
        {
            int detailLevel = grid.GetLevelForDistance(distErr);
            var cells = grid.GetNodes(shape, detailLevel, true);//true=intermediates cells
            //If shape isn't a point, add a full-resolution center-point so that
            // PointPrefixTreeFieldCacheProvider has the center-points.
            // TODO index each center of a multi-point? Yes/no?
            if (!(shape is Point))
            {
                Point ctr = shape.GetCenter();
                //TODO should be smarter; don't index 2 tokens for this in CellTokenStream. Harmless though.
                cells.Add(grid.GetNodes(ctr, grid.GetMaxLevels(), false)[0]);
            }

            //TODO is CellTokenStream supposed to be re-used somehow? see Uwe's comments:
            //  http://code.google.com/p/lucene-spatial-playground/issues/detail?id=4

            return new AbstractField[]
                       {
                           new Field(GetFieldName(), new CellTokenStream(cells.GetEnumerator()))
                               {OmitNorms = true, OmitTermFreqAndPositions = true}
                       };
        }

 /// <summary>
 /// Returns a ValueSource with values ranging from 1 to 0, depending inversely
 /// on the distance from {@link #makeDistanceValueSource(com.spatial4j.core.shape.Point)}.
 /// The formula is <c>c/(d + c)</c> where 'd' is the distance and 'c' is
 /// one tenth the distance to the farthest edge from the center. Thus the
 /// scores will be 1 for indexed points at the center of the query shape and as
 /// low as ~0.1 at its furthest edges.
 /// </summary>
 /// <param name="queryShape"></param>
 /// <returns></returns>
 public ValueSource MakeRecipDistanceValueSource(Shape queryShape)
 {
     Rectangle bbox = queryShape.GetBoundingBox();
     double diagonalDist = ctx.GetDistCalc().Distance(
         ctx.MakePoint(bbox.GetMinX(), bbox.GetMinY()), bbox.GetMaxX(), bbox.GetMaxY());
     double distToEdge = diagonalDist*0.5;
     float c = (float) distToEdge*0.1f; //one tenth
     return new ReciprocalFloatFunction(MakeDistanceValueSource(queryShape.GetCenter()), 1f, c, c);
 }

 protected override Document newDoc(String id, Shape shape)
 {
     //called by adoc().  Make compatible with BBoxStrategy.
     if (shape != null && strategy is BBoxStrategy)
         shape = ctx.MakeRectangle(shape.GetCenter(), shape.GetCenter());
     return base.newDoc(id, shape);
 }