#[1]iso2mesh: a Matlab/Octave-based mesh generator

Getting Started with iso2mesh

   Although iso2mesh provides a rich collection of [2]mesh-related
   functions, the core functionality, i.e. creating volumetric meshes from
   surfaces or binary image stacks, is very straightforward to use. A
   minimum step to perform such task only requires about 3 to 5 lines of
   matlab code. You can find a list of examples under the "sample"
   directory. In [3]this page, we summarize the overall work-flow of this
   toolbox.

   To outline a simple meshing session, let's assume you have a 3D image
   array, named "mydata", saved in a file called "mydata.mat". Variable
   mydata can be any 3D image, an MRI/CT scan or a simple binary mask
   produced by your own command. Here are the commands you need to produce
   a volumetric FEM mesh from this volume:

 load mydata.mat
 [node,elem,face]=v2m(mydata,0.5,5,100);
 plotmesh(node,face)

   Apparently, the first line loads the volumetric image data into your
   current session. The second line calls an iso2mesh function, 'v2m', the
   shortcut for vol2mesh, to construct a volumetric mesh from this data
   array. The first argument of v2m, "mydata", is the volumetric image you
   are about to mesh; the 2nd argument is the threshold value at which you
   define the boundary surface of the mesh; the 3rd argument, 5, defines
   the maximum size of the surface triangles; the last argument, 100,
   defines the maximum volume of the resulting tetrahedral elements. You
   can define a vector for the second argument, asking iso2mesh to produce
   multiple level-sets as the exterior or internal interfaces of the
   target domain. Both the 3rd and 4th arguments controls the density of
   the resulting mesh: the smaller the values, the more triangles on the
   surface and more tetrahedra in the volumetric mesh.

   There are 3 outputs from v2m command:
     * node: the node coordinates for the generated volumetric mesh, with
       dimension of NN x 3, with each column being x, y and z,
       respectively; NN is the number of nodes.
     * elem: the tetrahedral element info, with a dimension of NE x 4, NE
       being the number of tetrahedral elements; each row represents an
       element, and each column are the node indices for each corner of a
       tetrahedron.
     * face: triangular surface element info, with a dimension of NS x 4,
       NS being the number of surface triangles;the first 3 columns are
       the node indices of each corner of the triangle, and the last
       column is a flag to identify its mapping to the original surface
       id.

References

   1. http://iso2mesh.sourceforge.net/cgi-bin/index.cgi?action=rss
   2. http://iso2mesh.sourceforge.net/cgi-bin/index.cgi?Doc/FunctionList
   3. http://iso2mesh.sourceforge.net/cgi-bin/index.cgi?Doc/Workflow