CASSIE: Curve and Surface Sketching in Immersive Environments

We present CASSIE, a conceptual modeling system in VR that leverages freehand mid-air sketching, and a novel 3D optimization framework to create connected curve network armatures, predictively surfaced using patches with C0 continuity. Our system provides a judicious balance of interactivity and automation, providing a homogeneous 3D drawing interface for a mix of freehand curves, curve networks, and surface patches. Our system encourages and aids users in drawing consistent networks of curves, easing the transition from freehand ideation to concept modeling. A comprehensive user study with professional designers as well as amateurs (N=12), and a diverse gallery of 3D models, show our armature and patch functionality to offer a user experience and expressivity on par with freehand ideation, while creating sophisticated concept models for downstream applications.

@InProceedings{YASBS21,
  author       = "Yu, Emilie and Arora, Rahul and Stanko, Tibor and Bærentzen, J. Andreas and Singh, Karan and Bousseau, Adrien",
  title        = "CASSIE: Curve and Surface Sketching in Immersive Environments",
  booktitle    = "ACM Conference on Human Factors in Computing Systems (CHI)",
  year         = "2021",
  url          = "http://www-sop.inria.fr/reves/Basilic/2021/YASBS21"
}