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Code Listing by Luigi Giaccari

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returns a set of 2D coordinates from a 3D triangulated surface. 2D points are disposed inside a circle of unit radius so they represent a parametrization of the initial surface.

The triangulation is represented by the n x 3 t array.

In t are stored the triangles of the initial surface with first point corresponding to index 1.



This file contains a set of 3D models with the following characteristics:

p: nx3 array of 3D points
t: ntx3 array of triangles id. First points flagged as 1.
tnorm: ntx3 arrays normals of triangles with outward...



When the dataset is small, when you have to run only a few number of search, or when the dimensions of points is large, the brute search method is still faster than kd-trees data structure. Computing the distances one by one take a minor time than...



This can be considered the triangular version of file exchange id 20888 which uses quad patches.



This is a simple linear fem analysis of a 3D truss structure. Displacements, stress and strain are calculated.

It Can be used for any structure, you just need to have coordinates and connectivity data.

I tried to make the...



This is Brand new so please advise-me if problems occurs.

Here you can find an m-file with three different algorithms for inpolygon test.
Depending on the input data, the one that is extimate to be the best will be chosen.



The Matlab convhulln is a gateway to the quickhull algorithm ( see www.qhull.org ). In my opinion, one weak point of this mex routine is that it processes all the points without performing any preliminary filtering.
In many cases it would be...