CGAL users discussion list

[Yasheng Chen <>]

Hi all,

I have a biomedical application, in which I need to generate 3D mesh consisting four domains (A, B, C and D) representing regions with different properties.
In my FEM calculation, remesh is needed when the initial mesh becomes too distorted.  In this case, I need to generate a new set of mesh based upon the triangle boundary surfaces from all these regions.  

The geometries are in 3D and the figure below is only for a 2D illustration.  A is inside B, but A shares a portion of its boundary surfaces with B.  C is completely inside B, and D is completely inside C.  I checked the past archive and it seems that using nef_polyhedron can solve the problem, but due to my limited experience with CGAL, it is not straightforward enough for me.  I wonder whether someone can post some portion of their program if they handled similar situation before.

Thank you all very much!

Yasheng


****************************
*      *     *                   *
*      *  A  *                  *
*      *     *                   *
*      *******     B           *
*                                 *
*      ***************           *
*      *  *******        *          *
*      *   *     *   C     *         *
*      *   *  D  *         *         *
*      *   ********         *      *
*      **************** *       *
****************************