AI RESEARCH
HiDiGen: Hierarchical Diffusion for B-Rep Generation with Explicit Topological Constraints
arXiv CS.CV
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ArXi:2604.02847v1 Announce Type: new Boundary representation (B-rep) is the standard 3D modeling format in CAD systems, encoding both geometric primitives and topological connectivity. Despite its prevalence, deep generative modeling of valid B-rep structures remains challenging due to the intricate interplay between discrete topology and continuous geometry. In this paper, we propose HiDiGen, a hierarchical generation framework that decouples geometry modeling into two stages, each guided by explicitly modeled topological constraints.