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A Simulation Method of Wave Refraction Based on Gerstner Model

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

Active Publication Date: 2015-12-09
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • A Simulation Method of Wave Refraction Based on Gerstner Model
  • A Simulation Method of Wave Refraction Based on Gerstner Model
  • A Simulation Method of Wave Refraction Based on Gerstner Model

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Embodiment Construction

[0066] The algorithm flow for simulating wave refraction in the present invention is as follows figure 1 As shown, the implementation method is divided into the following steps:

[0067] (1) Extraction of shoreline

[0068] The preprocessing of terrain first needs to know the shoreline information of terrain, therefore, the present invention first extracts shoreline points for DEM terrain data, and the extraction process of shoreline points is as follows:

[0069] If the elevation h of the current terrain point (x, y) is 0, add the position (x, y) of the terrain point to the shoreline point set; if h is not 0, read the adjacent upper left two vertices Height h of (x-1,y) and (x,y-1) 10 and h 01 , and then judge h and h 10 relationship, if h and h 10 The same sign, there is no coastline point between the two, and the elevation point (x’, y) is added to the coastline point set according to the elevation difference value, for h 01 The same processing is also performed. 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 drawing of wave refraction effects in shallow waters, in particular to a wave refraction simulation method based on a Gerstner model. Background technique [0002] In recent years, real-time realistic rendering of water surface has been one of the challenging research hotspots in the fields of computer graphics and virtual reality. The simulation drawing of water surface is widely used in various fields such as military, energy, film and television, advertising, etc. People's research on water surface simulation drawing is also deepening continuously. Among them, the simulation drawing of water surface in shallow water is very important and very difficult. one of the directions. Affected by underwater topography and structures, the water surface in shallow waters will experience more complex fluctuations than those in deep waters, such as: wave shoaling, wave refraction, wave reflection and wave break, etc. , there...

Claims

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Application Information

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Patent Type & Authority Patents(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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