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Realistic modeling and drawing of shallow water wave

A realistic and water wave technology, applied in animation production, 3D image processing, image data processing, etc., can solve the problems of not showing steep peaks and curly waveforms, affecting drawing efficiency, etc., to achieve real optical effects and simple calculations Efficient, Complexity-Reducing Effects

Inactive Publication Date: 2010-12-29
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

The disadvantage is that because the shape of the water flow is regarded as a height field, it cannot express steep peaks and curly waves.
If the three-dimensional Navier-Stokes equation is used and the water flow is regarded as a point set composed of many water particles, then volume rendering is required to draw the shape of the water flow, which will affect the drawing efficiency

Method used

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  • Realistic modeling and drawing of shallow water wave
  • Realistic modeling and drawing of shallow water wave
  • Realistic modeling and drawing of shallow water wave

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Embodiment Construction

[0049] The algorithm flow of the present invention for solving the shallow water wave equation is as follows figure 1 As shown, the implementation method is as follows:

[0050] 1) Given the initial and boundary conditions

[0051] The definite solution of the equation problem needs to give certain initial and boundary conditions. Since the error of the initial condition decays quickly with time, the given initial condition does not have to be precise. A simple way to deal with it is to give a common value h to the height of the entire water surface 0 , while all water velocities are set to zero. In this way, the water flow is in a calm state first, and then the disturbance is applied to generate water waves.

[0052] On the other hand, because in the shallow water field flow simulation, the final height field and velocity field of shallow water are determined by the boundary conditions, so the boundary treatment is extremely important. In order to ensure the conservation...

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Abstract

A realistic modeling and drawing method of shallow water wave comprises the following three aspects: using a shallow water equation based on the physical principle to simulate the water face height field; introducing the external force such as the wind force in the shallow water equation; simulating the water face with the ripples; drawing the reflection and refraction effects of the water face, realizing emulation of the optical features of the ripple surface, and improving realistic drawing in the shallow water scene; using the way combined with the shallow water equation to realize interaction of the ripple and the other object, and improving the interaction of the ripple. The invention utilizes the difference method to solve the shallow water equation introduced with the wind force, thereby ensuring simple and valid calculation and long time step stability, and realizing the real-time performance of the ripple simulation. When the realistic drawing is ensured, the calculation performance is improved.

Description

technical field [0001] The invention relates to realistic modeling and rendering of shallow water waves. Background technique [0002] In recent years, in the fields of computer graphics and virtual reality, the simulation of natural scenes has been one of the challenging research hotspots. The simulation of natural scenery such as mountains and water has a wide range of applications in computer games, film and television, and advertisements. As an important content of natural scenery simulation, the simulation of water waves is increasingly attracting people's attention. However, compared with other scene simulations, the simulation of water waves is more difficult. This is because of the complex generation and evolution mechanism of water waves and the interaction mechanism with the environment, and the random movement mode, it is quite difficult to model and draw realistically. [0003] Methods for simulating waveforms can be broadly classified into the following three ...

Claims

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Application Information

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IPC IPC(8): G06T15/70G06T13/00
Inventor 王莉莉薛冰马志强赵泌平
Owner BEIHANG UNIV
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