Posing 3D Characters in Virtual Reality Through In-the-Air Sketches

Cannavò, Alberto; Zhang, Congyi; Wang, Wenping; Lamberti, Fabrizio

doi:10.1007/978-3-030-63426-1_6

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…The same VR system was used. The software adopted for the experimental activity was developed starting from the VR tool presented in [12] as a Blender 2.79 [30] add-on. This tool was previously used in other research works like, e.g., [10,11], and [25].…”

Section: Methodsmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

“…One of the most prominent fields in which VR can have a huge impact is the creation of digital contents. Tasks such as painting [17], modelling [4], sculpting [18], and animation [12] greatly benefit from the possibility for the user to visualize and interact with the actual workpiece in an immersive virtual environment [2].…”

Section: Introductionmentioning

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

Self Cite

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“…The idea of sketch‐based control is also popular in many other computer‐graphics domains [BC20], including character body animation [GCR13; GRGC15; CBL∗16; CZWL20]. We remind the reader that our method focuses on generating trajectories for agents, and not on animating their bodies in 3D.…”

Section: Related Workmentioning

confidence: 99%

Interaction Fields: Intuitive Sketch‐based Steering Behaviors for Crowd Simulation

Colas

Toll

Zibrek

et al. 2022

Computer Graphics Forum

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The real‐time simulation of human crowds has many applications. In a typical crowd simulation, each person ('agent') in the crowd moves towards a goal while adhering to local constraints. Many algorithms exist for specific local ‘steering’ tasks such as collision avoidance or group behavior. However, these do not easily extend to completely new types of behavior, such as circling around another agent or hiding behind an obstacle. They also tend to focus purely on an agent's velocity without explicitly controlling its orientation. This paper presents a novel sketch‐based method for modelling and simulating many steering behaviors for agents in a crowd. Central to this is the concept of an interaction field (IF): a vector field that describes the velocities or orientations that agents should use around a given ‘source’ agent or obstacle. An IF can also change dynamically according to parameters, such as the walking speed of the source agent. IFs can be easily combined with other aspects of crowd simulation, such as collision avoidance. Using an implementation of IFs in a real‐time crowd simulation framework, we demonstrate the capabilities of IFs in various scenarios. This includes game‐like scenarios where the crowd responds to a user‐controlled avatar. We also present an interactive tool that computes an IF based on input sketches. This IF editor lets users intuitively and quickly design new types of behavior, without the need for programming extra behavioral rules. We thoroughly evaluate the efficacy of the IF editor through a user study, which demonstrates that our method enables non‐expert users to easily enrich any agent‐based crowd simulation with new agent interactions.

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