Questions tagged [space-partitioning]

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A key-value datastructure with fast (on average) member move and nearest neighbors search?

I have a 3 dimensional float key search space (say a simulation world). I want to keep my values (ints, agent ids) in a data structure that can perform nearest neighbors search (with search for N ...
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Randomly partition an rectangle into N smaller rectangles

I'm looking for an algorithm that can partition a rectangle into N smaller rectangles, at random. N will be small (on the order of 5-10 in most cases). It need not be uniformly at random, but at the ...
1k views

Why does RAID-5 require an additional disk for parity blocks?

I know that RAID-5 consists of block-level striping across multiple disks, but using an additional parity-check block on each disk .. and that at least two disks are required for striping. And it's ...
499 views

Query all bounding boxes which contain a point

I'm looking for the most efficient spatial-indexing data-structure for storing and querying bounding boxes which contain individual points. The points represent 2D coordinates on a grid, while the ...
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Given a list of points on a sphere find the place for another point such that most space is covered?

Suppose I knew my current location as a geographical point (Lat/Lng) and had a standard radius to search (meters). Now given a list of previously searched geographical points as the centers of circles ...
227 views

Represent an octree as a binary tree of thrice the depth?

In an octree, each node has up to eight child nodes. This can be implemented with eight pointers per node that are set to null pointers if the child is not used. Another implementation uses a byte as ...
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balanced partitioning of nonconvex area between multiple agents in a grid world

In the original art gallery problem, there is a non-convex area provided and one has to divide it into regions based on infinite visibility of guards. We assume an unlimited number of guards. However, ...