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Conference Papers Year : 2021

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.
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Dates and versions

hal-03149000 , version 1 (22-02-2021)



Emilie Yu, Rahul Arora, Tibor Stanko, J Andreas Baerentzen, Karan Singh, et al.. CASSIE: Curve and Surface Sketching in Immersive Environments. CHI 2021 - ACM Conference on Human Factors in Computing Systems, May 2021, Yokohama, Japan. ⟨10.1145/3411764.3445158⟩. ⟨hal-03149000⟩
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