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This paper presents a methodology aiming at easing considerably thegeneration of high-quality meshes for complex 3D domains. We show that thewhole mesh generation process can be controlled with only five parameters togenerate in one stroke quality meshes for arbitrary geometries. The main ideais to build a meshsize field $h(x)$ taking local features of the geometry, suchas curvatures, into account. Meshsize information is then propagated from thesurfaces into the volume, ensuring that the magnitude of $\vert \nabla h \vert$is always controlled so as to obtain a smoothly graded mesh. As the meshsizefield is stored in an independent octree data structure, the function h can becomputed separately, and then plugged in into any mesh generator able torespect a prescribed meshsize field. The whole procedure is automatic, in thesense that minimal interaction with the user is required. Applications examplesbased on models taken from the very large ABC dataset, are then presented, alltreated with the same generic set of parameter values, to demonstrate theefficiency and the universality of the technique.

Automatic feature-preserving size field for 3D mesh generation