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Method for simulating wave refraction based on Gerstner model

A simulation method and wave technology, applied in the field of simulation and drawing of wave refraction effects in shallow water

Active Publication Date: 2013-11-27
ZHEJIANG UNIV
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Problems solved by technology

[0021] The present invention focuses on solving the two problems of terrain preprocessing and wave refraction simulation: in terms of terrain preprocessing, the present invention designs a terrain preprocessing method that is more suitable for real-time drawing of waves, and it has faster speed than the wave direction tracking algorithm. preprocessing speed, and no re-preprocessing is required when the waves change; in terms of wave refraction simulation, the present invention, on the basis of the original Gerstner theoretical model, comprehensively considers information such as water depth and shoreline, and efficiently realizes wave refraction Real-time simulation drawing

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  • Method for simulating wave refraction based on Gerstner model
  • Method for simulating wave refraction based on Gerstner model
  • Method for simulating wave refraction based on Gerstner model

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Embodiment Construction

[0067] The algorithm flow of the present invention for simulating wave refraction is as follows figure 1 As shown, its implementation method is specifically divided into the following steps:

[0068] (1) Extraction of shoreline

[0069] The preprocessing of the terrain first needs to know the shoreline information of the terrain. Therefore, the present invention first extracts the shoreline points from the DEM terrain data. The extraction process of the shoreline points is as follows:

[0070] If the elevation h of the current topographic point (x, y) is 0, add the position (x, y) of the topographic point to the set of shoreline points; if h is not 0, read the adjacent upper left vertices (x-1,y) and (x,y-1) elevation h 10 And h 01 , And then judge h and h 10 Relationship, if h and h 10 With the same sign, there is no shoreline point between the two, and the different sign will add the elevation point (x’,y) to the shoreline point set according to the elevation difference. 01 Do the ...

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Abstract

The invention discloses a method for simulating wave refraction based on a Gerstner model. The method comprises the steps that pre-process is conducted on terrain, according to DEM terrain data, shoreline points are extracted, the direction from terrain points to a shoreline is determined, the distance between the terrain points to the shoreline is calculated, and a terrain quad-tree LOD hierarchical structure is established through the data; wave refraction is drawn in a simulated mode, on the basis of an original Gerstner theoretic model, the height of wave fluctuation is calculated in a simulated mode through the depth of the terrain and the distance between the terrain points and the shoreline, the direction of wave fluctuation is determined in a simulated mode through the distance between the terrain points and the shoreline and the direction from the terrain points to the shoreline, and finally real-time and efficient simulated drawing of wave refraction in a shallow water area is obtained. The method is simple in calculation, high in efficiency, capable of guaranteeing the efficiency of real-time drawing and the sense of reality of drawing and extremely suitable for being used in a real-time drawing system.

Description

Technical field [0001] The invention relates to simulation rendering of wave refraction effects in shallow waters, in particular to a wave refraction simulation method based on Gerstner model. Background technique [0002] This year, in the field of computer graphics and virtual reality, real-time realistic rendering of the water surface has been one of the challenging research hotspots. The simulation drawing of water surface has a wide range of uses in various fields such as military, energy, film and television, advertising, etc. People are also constantly deepening the research on water surface simulation drawing. Among them, the simulation drawing of shallow water surface is very important and very difficult. One of the directions. Affected by the bottom topography and structures, the surface of shallow waters will have more complicated wave phenomena than the surface of deep waters, such as: wave shallowing, wave refraction, wave reflection, and wave break), etc. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
Inventor 徐晓刚郑文庭徐以波鲍虎军张宏鑫
Owner ZHEJIANG UNIV
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