欢迎访问《图学学报》 分享到：
图学学报

图学学报

• 图形学与可视化 • 上一篇    下一篇

航海模拟器视景系统中的混合浪绘制

  

  1. 广州航海学院海运学院，广东 广州 510725
  • 出版日期:2017-10-31 发布日期:2017-11-03
  • 基金资助:
    广东省普通高校特色创新项目(A510602)；广州航海学院创新强校工程建设项目(B510620)

Mixed Wave Rendering in the Visual System of a Maritime Simulator

  1. School of Navigation, Guangzhou Maritime University, Guangzhou Guangdong 510725, China
  • Online:2017-10-31 Published:2017-11-03

PDF (PC)

197

摘要： 使用快速傅里叶逆变换(IFFT) Gerstner 波模型描述海浪运动，在航海模拟器视景系
统中实现了混合浪实时绘制。利用六参数谱构造混合浪的波数谱，将该波数谱应用于海面高程和
choppy 波的傅里叶系数中，通过 IFFT 获得海面质点的位置，实现混合浪的实时绘制。绘制的混
合浪受低频长峰波影响，波形较为平坦光滑，与绘制的风浪有一定的差别，但与真实的海浪更为
接近。该方法在航海模拟器视景系统中的使用，表明帧率可以达到实时。

关键词: 海浪绘制, 混合浪, 风浪, 波数谱, 六参数谱

Abstract: Mixed wave is real-time rendered in the visual system of maritime simulator. Inverse fast
Fourier transform (IFFT) Gerstner wave model is used to compute the motion of ocean wave. Six
parameter spectrum, a frequency spectrum showing energy distribution of mixed wave, is applied to
construct the wave number spectrum of mixed wave. The wave number spectrum is contained by the
Fourier coefficients of height field and choppy wave. By IFFT, the position of mixed wave surface is
gotten. Further, mixed wave is rendered. The rendered mixed wave is affected by the low frequency
wave with long wave length. Its shape is smooth and flat, differs from that of wind wave, but is
similar with the actual ocean wave. The presented method of mixed wave rendering is used in the
visual system of the maritime simulator, and the frame rate meets the request of real-time rendering.

Key words: ocean wave rendering, mixed wave, wind wave, wave number spectrum, six parameter
spectrum