It appears that a certain project of mine will require the use of quad-trees, something that I have never worked with before. From what I have read they should allow substantial performance enhancements than a brute-force attempt at the problem would yield. Are any of these python modules any good? <ul> <li> Quadtree 0.1.2 <= No: unable to execute in Python 3.1</li> <li> QuadTree <= Yes: simple while working with rectangles</li> <li> quadtree.py <= No: no support for needed operations</li> </ul> EDIT 1: Does anyone know of a better implementation than the one presented in the pygame wiki? EDIT 2: Here are a few resources that others may find useful for path-finding techniques in Python. <ul> <li>Game Entity Navigation</li> <li>Catch the Cootie</li> </ul>

In this comment, joferkington refers to the current question and says: <blockquote> Just for whatever it's worth, <code>scipy.spatial.KDTree</code> (and/or scipy.spatial.cKDTree, which is written in C for performance reasons) is a far more robust choice than the options listed. </blockquote>

Are any of these quad-tree libraries any good?

Q: How does Quad Tree store information?

Quadtrees are implemented in image compression, where each node consists of the average colour of each of its children. The deeper we visit in the tree, the more the detail of the image. Quadtrees are also implemented in searching for nodes in a two-dimensional area.

Q: Where is quad tree used?

Quadtrees are used in image compression, where each node contains the average colour of each of its children. The deeper you traverse in the tree, the more the detail of the image. Quadtrees are also used in searching for nodes in a two-dimensional area.

Q: Is quad tree a KD tree?

The difference (algorithmically) is: in quadtrees, the data reaching a node is split into a fixed (2^d), equal size cells, whereas in kdtrees, the data is split into two regions based on some data analysis (e.g. the median of some coordinate).

Tags:

performance

python

quadtree

It appears that a certain project of mine will require the use of quad-trees, something that I have never worked with before. From what I have read they should allow substantial performance enhancements than a brute-force attempt at the problem would yield. Are any of these python modules any good?

Quadtree 0.1.2 <= No: unable to execute in Python 3.1
QuadTree <= Yes: simple while working with rectangles
quadtree.py <= No: no support for needed operations

EDIT 1: Does anyone know of a better implementation than the one presented in the pygame wiki?

EDIT 2: Here are a few resources that others may find useful for path-finding techniques in Python.

Game Entity Navigation
Catch the Cootie

901

asked Feb 19 '10 17:02

Noctis Skytower

1 Answers

In this comment, joferkington refers to the current question and says:

Just for whatever it's worth, scipy.spatial.KDTree (and/or scipy.spatial.cKDTree, which is written in C for performance reasons) is a far more robust choice than the options listed.

answered Oct 03 '22 04:10

Robert Pollak

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