Affiliation:
1. University of Toronto, Toronto, Ontario, Canada
Abstract
Complex 3D curves can be created by directly drawing mid-air in immersive environments (Augmented and Virtual Realities). Drawing mid-air strokes precisely on the surface of a 3D virtual object, however, is difficult, necessitating a projection of the mid-air stroke onto the user “intended” surface curve. We present the first detailed investigation of the fundamental problem of 3D stroke projection in VR. An assessment of the design requirements of real-time drawing of curves on 3D objects in VR is followed by the definition and classification of multiple techniques for 3D stroke projection. We analyze the advantages and shortcomings of these approaches both theoretically and via practical pilot testing. We then formally evaluate the two most promising techniques
spraycan
and
mimicry
with 20 users in VR. The study shows a strong qualitative and quantitative user preference for our novel stroke
mimicry
projection algorithm. We further illustrate the effectiveness and
utility of stroke mimicry to draw complex 3D curves on surfaces for various artistic and functional design applications.
Funder
NSERC Discovery
software and research donations from Adobe
Publisher
Association for Computing Machinery (ACM)
Subject
Computer Graphics and Computer-Aided Design
Reference80 articles.
1. Adobe. 2020. Substance Painter. https://www.substance3d.com/substance-painter/. Adobe. 2020. Substance Painter. https://www.substance3d.com/substance-painter/.
2. Adobe. 2021. Medium by Adobe. https://www.adobe.com/products/medium.html. Adobe. 2021. Medium by Adobe. https://www.adobe.com/products/medium.html.
3. Experimental Evaluation of Sketching on Surfaces in VR
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