Cassie: Curve and surface sketching in immersive environments

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Abstract

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 ofer a user experience and expressivity on par with freehand ideation, while creating sophisticated concept models for downstream applications.

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Yu, E., Arora, R., Stanko, T., Baerentzen, J. A., Singh, K., & Bousseau, A. (2021). Cassie: Curve and surface sketching in immersive environments. In Conference on Human Factors in Computing Systems - Proceedings. Association for Computing Machinery. https://doi.org/10.1145/3411764.3445158

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