Module: GeoTreeModule
- Defined in:
- lib/geotree/loc.rb,
lib/geotree/node.rb,
lib/geotree/bounds.rb,
lib/geotree/geotree.rb,
lib/geotree/ptbuffer.rb,
lib/geotree/datapoint.rb,
lib/geotree/multitree.rb
Defined Under Namespace
Classes: Bounds, DataPoint, GeoTree, Loc, MultiTree, Node, NodeI, NodeL, Partition, PtBuffer, TreeStats
Constant Summary collapse
- LOC_MAX =
((1 << 30)-1)
- LOC_MIN =
-LOC_MAX
- LAT_LONG_FACTOR_ =
Factor for converting integer locations to latitude/longitudes
180.0 / LOC_MAX
- DATAPOINT_INTS =
4- PARTITION_INTS =
2- INT_BYTES =
4- DATAPOINT_BYTES =
DATAPOINT_INTS * INT_BYTES
- KDTREE_BLOCKSIZE =
256- NODEI_CHILDREN =
(((KDTREE_BLOCKSIZE/INT_BYTES) - 6)/2)
- NODEL_CAPACITY =
(((KDTREE_BLOCKSIZE/INT_BYTES) - 4)/4)
- SPLIT_SIZE =
The maximum population of a leaf node (+ overflow nodes) without splitting (although splitting is disabled if the leaf bounds gets too small)
(NODEL_CAPACITY * 3)
- SPLITTABLE_LINEAR_SIZE =
The size below which a bounds cannot be further subdivided (to convert a leaf node that’s at capacity to an internal node)
2- KD_CACHE_SIZE =
(100000/KDTREE_BLOCKSIZE)
- HDR_FLAGS =
Block fields for Node base class (each is an int)
0- HDR_INTS =
1- IFLD_POPULATION =
Block fields for NodeI subclass
HDR_INTS- IFLD_PARTITIONS =
IFLD_POPULATION + 1
- IFLD_INTS =
IFLD_PARTITIONS + NODEI_CHILDREN * PARTITION_INTS
- LFLD_OVERFLOW =
Block fields for NodeL subclass
HDR_INTS- LFLD_USED =
LFLD_OVERFLOW+1
- LFLD_DATAPOINTS =
LFLD_USED+1
- LFLD_INTS =
(LFLD_DATAPOINTS + NODEL_CAPACITY * DATAPOINT_INTS)
- MAX_POINT_WEIGHT =
1 + the maximum datapoint weight; must be power of 2
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