1/f/sup β/ noise-based real-time animation of trees swaying in wind fields

Ota, S.; Tamura, Masahiko; Fujita, Kohei; Fujimoto, Tadahiro; Muraoka, Kazunobu; Chiba, Norishige

doi:10.1109/cgi.2003.1214447

Cited by 14 publications

(10 citation statements)

References 6 publications

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“…[Zhao and Barbič 2013] proposed to convert plant geometry to a format suitable for physically based simulation. Procedural methods: These methods are usually based on noise functions to heuristically model the appearance of tree motions, for example, in [Ota et al 2003], [Sousa Hubert Nguyen, 2007] and [Hu et al 2009;Hu et al 2012]. Procedural methods are commonly employed to generate the wind effect by using trigonometric functions or noise [Pelzer Randima Femando, 2004;Zioma Hubert Nguyen, 2007].…”

Section: Animating Trees In 3d Scenesmentioning

confidence: 99%

Animating 3D vegetation in real-time using a 2D approach

Chen

Johan

2015

Proceedings of the 19th Symposium on Interactive 3D Graphics and Games

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In this paper, we propose a 2D approach for real-time animation of vegetation in 3D scenes, especially suitable for simulating wind effects on 3D vegetation fields with densely leaved foliage. We represent a vegetation field as view-dependent 2D billboard layers, perform a 2D harmonic motion simulation for modeling the dynamics of vegetation at the first layer (closest to the viewer), and utilize this dynamics to guide the animation of the rest of the layers while addressing the motion effects in depth and occlusion effects. As a result, our method can produce natural looking motions of vegetation swaying in wind comparable with existing commercial software, however the effort to setting up the underlying animation model and the computational cost can be significantly reduced

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Section: Animating Trees In 3d Scenesmentioning

confidence: 99%

Animating 3D vegetation in real-time using a 2D approach

Chen

Johan

2015

Proceedings of the 19th Symposium on Interactive 3D Graphics and Games

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“…Ota et al [2003] combine 1/f β noise power spectra for approximating wind with a spring model to describe branch dynamics. Diener et al [2008] propose more evolved mechanical means to model a tree's response to varying wind-fields.…”

Section: Related Workmentioning

confidence: 99%

Windy trees

et al. 2014

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Figure 1: A 3D tree model is imported to our framework (a) and develops according to a prevailing wind direction (b) and (c). Besides considering wind as developmental factor our system also handels the breaking of branches (d) and the abrasion and drying of buds (e). AbstractWe present a novel method for combining developmental tree models with turbulent wind fields. The tree geometry is created from internal growth functions of the developmental model and its response to external stress is induced by a physically-plausible wind field that is simulated by Smoothed Particle Hydrodynamics (SPH). Our tree models are dynamically evolving complex systems that (1) react in real-time to high-frequent changes of the wind simulation; and (2) adapt to long-term wind stress. We extend this process by wind-related effects such as branch breaking as well as bud abrasion and drying. In our interactive system the user can adjust the parameters of the growth model, modify wind properties and resulting forces, and define the tree's long-term response to wind. By using graphics hardware, our implementation runs at interactive rates for moderately large scenes composed of up to 20 tree models.

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“…Procedural methods: In these methods, the appearance of tree motions are usually heuristically modeled based on procedural functions . Trigonometric and noise functions have been widely used to simulate the wind effect .…”

Section: Related Workmentioning

confidence: 99%

“…Summary: Physics‐based methods can achieve physically realistic animations; however, they usually lack intuitive direct control and require a high computational cost. Procedural methods can achieve natural looking animations; however, it is in general difficult to design a procedure to achieve a given specific effect. Both the physical and procedural methods require to set and tune a number of parameters (some are not intuitive); unfortunately, it is not always easy to relate these parameters to the actual effects.…”

Section: Related Workmentioning

confidence: 99%

Interactive authoring of bending and twisting motions of short plants using hand gestures

Chen

Johan

2017

Computer Animation & Virtual

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In this paper, we propose an approach to interactively author the bending and twisting motions of short plants using hand gestures, especially suitable for grass, flowers, and leaves. Our method is based on the observations that hand motions can represent the bending and twisting motions of short plants and using a hand to describe motions is natural and proficient for human. We therefore use a hand as a "puppet" to author the animation of one single short plant based on transferring the motions of a hand to the motions of a short plant. We first author the global motions of the short plant followed by the motions of its elements such as leaves and flowers. We also propose a framework to utilize the animation results to animate a field of short plants and further adjust the motion effects according to the properties of the short plants, such as rigidity. As a result, users can intuitively and rapidly author and generate their desired motions of short plants under the influence of external forces. Especially, our method is accessible to non-expert users and suitable for fast prototyping and authoring specific motions of short plants such as in cartoons.

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1/f/sup β/ noise-based real-time animation of trees swaying in wind fields

Cited by 14 publications

References 6 publications

Animating 3D vegetation in real-time using a 2D approach

Animating 3D vegetation in real-time using a 2D approach

Windy trees

Interactive authoring of bending and twisting motions of short plants using hand gestures

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