Hex-Mesh Generation and Processing: A Survey

In this article, we provide a detailed survey of techniques for hexahedral mesh generation. We cover the whole spectrum alternative approaches to generation, as well post-processing algorithms connectivity editing and optimization. For each technique, highlight capabilities limitations, also pointing out associated unsolved challenges. Recent relaxed approaches, aiming generate not pure-hex but hex-dominant meshes, are discussed. The required background, pertaining geometrical combinatorial aspects, is introduced along way.