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2.1 Introduction

The MODULEF library proposes the following algorithms for three-dimensional meshes:

• methods corresponding to a manual approach,
• a transport-projection function (or algebraic method),
• a translation-stacking or extrusion technique (for topologically cylindrical domains),
• a finite difference type mesh generator (for topologically hexahedral domains),
• a multi-block method, and
• a surface mesh generator for certain configurations.

Module APNOP3, called directly, or via the preprocessor APN3XX, performs the following functions:

1. generates three-dimensional meshes, for simple cases, from the point and two-dimensional mesh data, using the mesh algorithms. For complex domains, the mesh is generated by calling the appropriate modules directly (see chapter 3);
2. restores the NOPO data structures (or D.S.), containing the meshes created, in main memory (in particular, using the methods described in chapter 3);
3. modifies and combines these meshes to form new meshes, along with their corresponding D.S. NOPO, which can be saved on sequential file.