secto3d
=======

3D surfaces conversion



Calling Sequence
~~~~~~~~~~~~~~~~


::

    [m[,x]]=secto3d(seclist,npas)
    [m]=secto3d(seclist ,x)




Arguments
~~~~~~~~~

:seclist a list whose elements are (2,.) matrices
: :npas an integer
: :m a matrix
: :x a vector
:



Description
~~~~~~~~~~~

Considering a surface given through a list `seclist` of sections in
the `(x,z)` plane `[m [,x]]=secto3d(seclist [,npas])` returns a matrix
`m` which contains a regular discretization of the surface.


+ The i-th row of the matrix m corresponds to the i-th section
+ The j-th column of m corresponds to the x(j)


Each section `seclist(i)` is described by a (2,.) matrix which gives
respectively the x and z coordinates of points.

`[m]=secto3d(seclist ,x)`in that case the x-vector gives the
discretization of the x-axis for all the sections



See Also
~~~~~~~~


+ `plot3d`_ 3D plot of a surface


.. _plot3d: plot3d.html