Ocean Wave Rendering with Whitecap in the Visual System of a Maritime Simulator

The whitecap is an important oceanographic phenomenon. However, existing whitecap rendering methods do not successfully generate realistic whitecaps. To solve this problem, this paper presents a real-time whitecap rendering method applied to the visual system of a maritime simulator. The method take...

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Vydáno v:Journal of computing and information technology Ročník 25; číslo 1; s. 63 - 76
Hlavní autoři: Chen, Lining, Jin, Yicheng, Yin, Yong
Médium: Journal Article Paper
Jazyk:angličtina
Vydáno: Sveuciliste U Zagrebu 01.03.2017
Fakultet elektrotehnike i računarstva Sveučilišta u Zagrebu
University of Zagreb Faculty of Electrical Engineering and Computing
Témata:
Analysis
Beaufort scale
Beaufort wind scale
Computer graphics
Gerstner wave
maritime simulator
Methods
ocean wave rendering
Ocean waves
Visualization (Computer)
whitecap
whitecap coverage
ISSN:1330-1136, 1846-3908
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Popis
Shrnutí:The whitecap is an important oceanographic phenomenon. However, existing whitecap rendering methods do not successfully generate realistic whitecaps. To solve this problem, this paper presents a real-time whitecap rendering method applied to the visual system of a maritime simulator. The method takes the vertical acceleration on the wave crest as the criterion of whitecap generation. The Fourier coefficient of the vertical acceleration is provided, and a continuous mathematical model computing the whitecap coverage is built. The vertical acceleration is the variable of the model. The lifetime of the whitecap's existence can be controlled by the parameter of the model, and the parameter is computed with the genetic algorithm. The average of the computed whitecap coverage is equal to the whitecap coverage computed by the stochastic method and is close to the whitecap coverage computed by the empirical formula. The whitecap coverage is used as the blending factor to blend the pixel color of the whitecap texture and that of the sea surface. The presented method has sound theoretical support, with small computational complexity. The rendered whitecap is closer to the description of the Beaufort wind force scale than before.
Bibliografie:179240
ISSN:1330-1136
1846-3908
DOI:10.20532/cit.2017.1003327