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Axes of Evil
A quick and dirty set of 3D axes for Visual: from visual import arrow, cylinder def visual_axes( scale ): """\ Display a set of 3D axes. @param scale: The scale of the axis set. @type scale: C{float} """ for axis in [ tuple( [ i == j and scale * 5 or 0 […]
Comments Off on Axes of EvilMar 22nd, 2010  Filed under Uncategorized 
Topology, To What End?
There have been a number of approaches to build topological models of multicamera networks. The idea is to represent, in some useful and relatively simple mathematical way, the relationship — usually meaning the overlap — between the fields of view of the cameras. To date, it seems as though all such methods fall into two […]
Comments Off on Topology, To What End?Mar 19th, 2010  Filed under UncategorizedTags: research 
Snap To Grid
I like Gabor Herman‘s definition of discrete Euclidean space. He defines, for any positive real number and any positive integer : This chops Nspace up into a square (cubic, etc.) Bravais lattice, with primitive vectors of magnitude . Each point in the discrete space is then associated with a primitive cell (or Voronoi neighbourhood, in […]
Comments Off on Snap To GridMar 17th, 2010  Filed under Uncategorized 
Pi Day Madness
You have a righthanded Cartesian coordinate basis of a threedimensional Euclidean space, with axes , , and . You’re given some spatialdirectional vectors of the form , where and are, respectively, the inclination angle (from the positive axis zenith) and the azimuth angle (measured righthanded from the positive axis) of an associated direction, which is […]
Comments Off on Pi Day MadnessMar 14th, 2010  Filed under Uncategorized