Agile 3D Sketching with Air Scaffolding

Kim, Yongkwan; An, Sang-Gyun; Lee, Joon Hyub; Bae, Seok-Hyung

doi:10.1145/3170427.3186522

Cited by 6 publications

(5 citation statements)

References 1 publication

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“…Arora et al [3] and Drey et al [17] propose to use a 2D tablet on which the artist sketches precise strokes that are then mapped to a proxy 3D surface defined by a few freehand 3D strokes or the extrusion of a stroke. In a similar spirit, Kim et al [35] capture hand motion to describe 3D scaffolding surfaces on which 2D strokes are projected. In contrast, our system offers a direct sketching workflow where users draw free-form 3D curves with their dominant hand, and only use the other hand for navigation.…”

Section: Related Workmentioning

confidence: 99%

CASSIE: Curve and Surface Sketching in Immersive Environments

Arora

Stanko

et al. 2021

Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems

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Figure 1: Freehand 3D sketching in AR/VR allows rapid conceptualization of design ideas (a). However, 3D inputs are prone to large inaccuracies (a, inset) and sketches cannot be utilized in downstream design pipelines. Our novel 3D sketching system, CASSIE, allows the creation of clean, well-connected 3D curve networks by performing automatic stroke neatening (b). These curve networks are augmented by our on-the-fly cycle detection and surfacing method (c) which improves shape perception by providing occlusion cues. We evaluated CASSIE with 12 users and utilized it for creating 3D concepts for a variety of application domains (d).

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Section: Related Workmentioning

confidence: 99%

CASSIE: Curve and Surface Sketching in Immersive Environments

Arora

Stanko

et al. 2021

Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems

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“…Numerous works investigated the advantages of 3D over traditional 2D sketching [4,5,22,26]. However most of them focused on the use of 2D sketching interfaces for generating the 3D sketches, whose output was visualized on classical 2D displays.…”

Section: Related Workmentioning

confidence: 99%

Evaluating Consumer Interaction Interfaces for 3D Sketching in Virtual Reality

Cannavò

Calandra

Kehoe³

et al. 2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Since its introduction, 3D mid-air sketching in immersive Virtual Reality (VR) proved to be a very powerful tool for many creative applications. However, common VR sketching suites rely on the standard hand controllers bundled with home VR systems, which are non-optimal for this kind of tasks. To deal with this issue, some research works proposed to use dedicated pen-shaped interfaces tracked with external motion-capture systems. Regrettably, these solutions are generally rather expensive, cumbersome and unsuitable for many potential end-users. Hence, lots of challenges regarding interfaces for 3D sketching in VR still exist. In this paper, a newly proposed sketching-oriented input device (namely, a VR stylus) compatible with the tracking technology of a consumer-grade VR system is compared with a standard hand controller from the same system. In particular, the paper reports the results of a user study whose aim was to evaluate, in both objective and subjective terms, aspects like, among others, sketching accuracy, ease of use, efficiency, comfort, control and naturalness.

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“…Researchers have experimented with a range of techniques to form three-dimensional curves [25,19,52,26,12,3,32] to enable direct 3D drawing. For example, Grossman et al [19] allow users to manipulate a physical tape that represents the 3D curve; Keefe et al [30] propose a system consisting of a virtual pencil, attached to a haptic device, and a stereoscopic display.…”

Section: Pen and Brush Interfacesmentioning

confidence: 99%

StripBrush: A Constraint-Relaxed 3D Brush Reduces Physical Effort and Enhances the Quality of Spatial Drawing

Rosales¹,

Rodríguez²,

Araújo³

et al. 2021

Preprint

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Spatial drawing using ruled-surface brush strokes is a popular mode of content creation in immersive VR, yet little is known about the usability of existing spatial drawing interfaces or potential improvements. We address these questions in a threephase study. (1) Our exploratory need-finding study (N=8) indicates that popular spatial brushes require users to perform large wrist motions, causing physical strain. We speculate that this is partly due to constraining users to align their 3D controllers with their intended stroke normal orientation. (2) We designed and implemented a new brush interface that significantly reduces the physical effort and wrist motion involved in VR drawing, with the additional benefit of increasing drawing accuracy. We achieve this by relaxing the normal alignment constraints, allowing users to control stroke rulings, and estimating normals from them instead. (3) Our comparative evaluation of StripBrush (N=17) against the traditional brush shows that StripBrush requires significantly less physical effort and allows users to more accurately depict their intended shapes while offering competitive ease-of-use and speed.

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Agile 3D Sketching with Air Scaffolding

Cited by 6 publications

References 1 publication

CASSIE: Curve and Surface Sketching in Immersive Environments

CASSIE: Curve and Surface Sketching in Immersive Environments

Evaluating Consumer Interaction Interfaces for 3D Sketching in Virtual Reality

StripBrush: A Constraint-Relaxed 3D Brush Reduces Physical Effort and Enhances the Quality of Spatial Drawing

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