Method for simulating corrosion effect of rainfall on ground surface

A simulation method and ground technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as difficulty in meeting application needs and low accuracy

Inactive Publication Date: 2013-07-31
BEIHANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy of the results obtained by this method is low, and it is usually difficult to meet the application needs

Method used

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  • Method for simulating corrosion effect of rainfall on ground surface
  • Method for simulating corrosion effect of rainfall on ground surface
  • Method for simulating corrosion effect of rainfall on ground surface

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Embodiment Construction

[0032] In order to realize and verify the present invention, we design and realize a scene of rainfall. This scene includes rainfall, the accumulation of rainwater on the ground and the erosion effect on the ground during the accumulation process. The scene uses an 800×800 terrain, the maximum number of particles is 20,000, and the rendering frame rate is 25 frames per second, which reaches the real-time speed. The programming language of the verification program is C++, the underlying graphics drawing API adopts OpenGL 3.0, and the coloring language is CG.

[0033] First simulate the rain effect. A GPU-based particle system is used to simulate raindrops in the sky. Randomly distributed raindrop particles are generated within a certain height range on the ground, given a random initial velocity, and then according to the motion law of the raindrop particles under the action of gravity, air buoyancy and air resistance, the motion equation of the raindrop particles is obtained...

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Abstract

The invention relates to a method for simulating the corrosion effect of rainfall on ground surface, comprising the following four steps: rainfall effect simulation, raindrop particles produced in a rainfall process are converted into water particles on the ground surface; motion of water flow on the ground surface is simulated, surface particles are traced by utilizing a space-based distance field, and the surface of the water flow is drawn; soil particles on the ground surface are taken away in the motion process of the water flow to form suspended matters, wherein the content of the suspended matters in water is represented by the solid volume fraction of the water particles, and the suspended matters are transferred among the water particles and among the water particles and boundary particles in the motion and sedimentation process; and the ground level is changed as the soil particles are dissolved and the suspended matters are deposited, the effect of the water flow on the ground surface is reflected by the boundary particles, the ground level rises while the content of the suspended maters in the boundary particles is increased, and the ground level falls while the contentof the suspended matters in the boundary particles is reduced. By effectively processing several key points in the rainfall, water logging and corrosion process, the corrosion effect of rainfall on the ground surface can be simulated in real time.

Description

technical field [0001] The invention relates to a method for simulating the effect of rainfall on ground erosion. Background technique [0002] Virtual reality technology has been widely used in military, film and television advertisements, electronic games, education and other fields. Its purpose is to use computers to reproduce the real world around or simulate a virtual world that meets people's intuitive feelings, so as to bring better user experience. Although the real world looks simple, it is extremely complex to deal with by computer, especially the simulation of natural phenomena, such as water flow, raindrops, snowflakes, waterfalls, waves, flames, clouds, lightning, flying dust, flowers, trees and other dynamic changes objects and phenomena. Different from regular geometry, the surface of natural scenes often contains rich details or has randomly changing shapes, which are difficult to describe with traditional analytical surfaces, which makes traditional modeli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/00
Inventor 郝爱民刘勇敢朱诗武丛宇
Owner BEIHANG UNIV
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