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Code Listing by Luigi Giaccari

Code 21-27 of 27   Pages: Go to  << Prior  1  2  3  page  

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 ). 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...