arXiv AI
Oct 9

HistCAD: Constraint-Aware Parametric CAD Histories for Evaluating Editability

HistCAD is an executable representation and dataset comprising 180,495 parametric construction histories with sketch constraints and feature operations, split into Academic and Industrial collections. The benchmark evaluates whether predicted constraints can enable a history to reproduce an initial model and perform a specified dimensional edit, measuring success when the model matches the required geometry, reaches the target value, preserves relations, and rebuilds through the entire history. Predictors trained on both collections achieve 52.4% edit success on Academic data and 29.0% on Industrial data, with models retaining only endpoint-connectivity constraints sometimes reaching the target but failing to preserve all relations.

By Xintong Dong, Chuanyang Li, Peng Zheng, Chuqi Han, Jiaxin Jing, Hailong Shen, Yanzhi Song, Zhouwang Yang
arXiv Machine Learning
Sep 2

CADKnitter: Compositional CAD Generation from Text and Geometry Guidance

CADKnitter is a compositional CAD generation framework that uses geometric-guiding cues to steer diffusion sampling, enabling the creation of complementary CAD parts that satisfy both geometric constraints of an existing model and semantic constraints from a text prompt. The authors introduce KnitCAD, a dataset of over 310,000 CAD models paired with textual prompts and assembly metadata to support training and evaluation. Experiments show that CADKnitter outperforms state‑of‑the‑art baselines by a clear margin.

By Tri Le, Khang Nguyen, Baoru Huang, Tung D. Ta, Anh Nguyen
arXiv Machine Learning
Jun 3

CADFit: Precise Mesh-to-CAD Program Generation with Hybrid Optimization

arXiv:2605. 01171v2 Announce Type: replace-cross Abstract: Despite recent progress, recovering parametric CAD construction sequences from geometric input, such as meshes or point clouds, is a key challenge for design and manufacturing, as existing CAD reconstruction and generation methods are largely restricted to difficult-to-edit formats like meshes or Breps or editable simple sketch-and-extrude pipelines and low-complexity datasets.

By Ghadi Nehme, Eamon Whalen, Faez Ahmed