Method for drawing surface of SPH (smoothed particle hydrodynamics) fluid in real time on basis of screen spaces

A fluid surface, real-time rendering technology, applied in 3D image processing, image data processing, 3D modeling, etc., can solve the problems of fluid surface extraction and rendering method efficiency issues, to facilitate parallel computing acceleration, reduce distortion, and improve efficiency high effect

Inactive Publication Date: 2014-03-26
BEIHANG UNIV
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Problems solved by technology

[0007] The technical problem that the present invention solves is: overcome the efficiency problem of existing fluid...

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  • Method for drawing surface of SPH (smoothed particle hydrodynamics) fluid in real time on basis of screen spaces
  • Method for drawing surface of SPH (smoothed particle hydrodynamics) fluid in real time on basis of screen spaces
  • Method for drawing surface of SPH (smoothed particle hydrodynamics) fluid in real time on basis of screen spaces

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Embodiment Construction

[0039] figure 1 The overall processing flow of the real-time rendering method of SPH fluid surface based on screen space is given, and the present invention will be further described below in conjunction with other drawings and specific implementation methods.

[0040] The present invention provides a real-time drawing method of SPH fluid surface based on screen space, and the main steps are introduced as follows:

[0041] 1. Fluid physical simulation method

[0042] The present invention adopts the SPH method to simulate the motion of the fluid. The SPH method uses a group of particles to discretize the simulated continuous medium (fluid or solid). Each particle represents a medium group in the macroscopic continuous field, and moves at a local speed with the movement of the medium. It is a typical Lagrangian method. In the SPH method, particles are not only used to estimate field variables and approximate governing equations, but also represent medium systems with macrosco...

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Abstract

The invention provides a method for drawing the surface of SPH (smoothed particle hydrodynamics) fluid in real time on the basis of screen spaces. The method aims to track the surface of the fluid in real time and vividly draw the surface of the fluid on the basis of dynamic behavior of the fluid simulated by an SPH process, and research is carried out around an acceleration computation process on the basis of the screen spaces. The method includes generating depth graphs of the fluid in three-dimensional spaces from viewpoint positions; smoothing and filtering the depth graphs to dynamically extract the surface of the fluid relative to viewpoints; combining optical effects of environment mapping, fluid reflection, refraction and the like; simulating interaction among the fluid and other three-dimensional solid bodies in virtual scenes; vividly drawing flexible body and fluid interaction scenes on the basis of a GPU (graphics processing unit). The method has the advantages that various computation and rendering are carried out completely on the basis of the GPU, all operation can be carried out in a parallel mode, and the method is good in real-time performance and physical realism.

Description

technical field [0001] The invention relates to a real-time rendering method of SPH fluid surface based on screen space. Background technique [0002] In recent decades, simulation research on flowing objects such as flowing water and smoke has developed rapidly. Research in this field involves multiple academic directions such as fluid dynamics, numerical calculation, calculus, and computer graphics. It has high practical value in game entertainment, scientific computing, and simulation training. It has always been a very challenging task. sex research hotspot. In recent years, with the popularization of multi-core CPU and GPU parallel processing technology, fluid-based modeling and simulation technology has developed rapidly and become a new research hotspot in the field of computer graphics. With the help of GPU parallel accelerated computing, in a specific range Fluid simulation with high precision can basically meet the needs of real-time interaction. [0003] Physic...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T15/50
Inventor 郝爱民夏清李帅王莉莉
Owner BEIHANG UNIV
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