Liquid column simulation method for virtual experiments

Abstract

The invention discloses a liquid column simulation method for virtual experiments. The liquid column simulation method for virtual experiments comprises the following steps that the volume of a cylindrical liquid column in a vessel is initialized, and a cylinder height value is obtained; an event influencing changes of the liquid volume is captured, and the liquid volume value is updated; a symbol shown in the description is transformed into a liquid column coordinate system to obtain a symbol shown in the description, in the oxyz coordinate system, the horizontal plane alpha of a world coordinate system includes a point o'=(x0,y0,z0), and the plane equation is expressed with a point normal form; all mesh points P=(x1,y1,z1) of the top face of the liquid column are projected to the plane alpha, and the real coordinates of the mesh points are obtained; the updated liquid column top face height and contour information is sent to a traditional liquid level simulation algorithm, and the dynamic effect of the liquid column with any depth is simulated. By means of the liquid column simulation method for virtual experiments, collision detection is not needed in the whole simulation process, calculation is fast and easy to achieve, and the simulation efficiency is high; a real solution can be simulated through texture mapping giving a vivid liquid effect on the liquid column, and the liquid column simulation method is very suitable for application occasions where liquid is contained in transparent vessels.

Description

technical field [0001] The invention relates to a liquid simulation method, in particular to a liquid column simulation method for virtual experiments. Background technique [0002] Virtual experiments (also known as virtual reality experiments) refer to the use of multimedia, simulation and virtual reality (also known as VR) technologies to create relevant software and hardware operating environments on computers that can assist, partially replace, or even completely replace the various operating links of traditional experiments. In the experiment, the experimenter can complete various experimental projects as in the real environment, and the experimental effect obtained is equal to or even better than that obtained in the real environment. [0003] Liquid simulation has always been an important way for virtual experiment systems to truly represent the system environment, and has even become a reference standard for many developers to choose graphics engines. In the applic...

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Problems solved by technology

[0005] The method of grid simulation has the advantages of fast speed and realistic water wave effect, but the disadvantage is that the grid surface is limited by the nature of many basic unit facets spliced ​​together without thickness, and can only simulate the dynamics of one surface As a result, the internal change process of the fluid with the height of the liquid column and the information of the depth of the liquid column cannot be expressed, and the process of the colored liquid in the beaker shaking in the cup cannot be simulated. Therefore, when the grid simulates the liquid surface, the camera's angle of view is generally to look down at the water surface

[0006] The particle-based method can truly simulate the natural flow process of water droplets and the effect of liquid sloshing in the container, but the disadvantage is that the simulation process relies on a large number of collision detection to show the effect of interaction between particles. The calculation and time consumption are prone to lag and collision leak detection when the liquid container is moved quickly, resulting in the phenomenon of "leakage"

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