Method for constructing streamline animation under wind field driving of particle system based on GS (Geometry Shader)

Abstract

The invention discloses a method for constructing a streamline animation under the wind field driving of a particle system based on a GS (Geometry Shader). A great quantity of particle belts forms the streamline animation of the wind field; each particle belt takes m control vertexes as a basis and consists of a corresponding triangular facet; one particle belt is one moving streamline in the streamline animation of the wind field; firstly, a control point processing module is established for controlling the initial position, the life cycle and the intensity element of the control point of the particle belt of each wind field streamline; a GS module is established for dynamically generating more vertexes in a display card on the basis of the control point in the GS processing stage of the programmable pipeline of the display card so as to construct the triangular facet required by each particle. By use of the method, the rendering pipeline of a traditional fixed pipeline is abandoned, the programmable pipeline of the display card on the basis of Direct3D 11 is used, the vast majority of calculation is finished in the stream processor array of the display card, and the calculation burden of a CPU (Central Processing Unit) is fundamentally solved.

Description

[0001] [technical field] [0002] The invention relates to a Direct3D 11 data processing and shader construction method, in particular to a method for constructing a wind field streamline animation based on a GS (geometry shader) particle system driven by a model wind field. [0003] [Background technique] [0004] With the development of numerical forecasting and computer technology, meteorological forecasters often use high-resolution numerical weather prediction models to carry out meteorological forecasting. The wind field data output by these numerical weather prediction models can reflect the strength and intensity of the wind field in the grid predicted by the model. direction information. [0005] The wind vector rod is the traditional drawing method of wind field data. The wind vector rod has direction and strength information, which is used to represent the direction and magnitude of the wind at a certain point in the grid. But this display scheme has the following d...

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Problems solved by technology

This method of sampling and drawing wind field grid data cannot comprehensively present all the information of the wind field

[0007] 2. Although we can draw all the wind vector poles of a certain part of the grid by enlarging the local part of the model grid, this drawing method cuts the connection between the part and the whole, and this processing scheme will bring about Trees, the downside of missing the forest

[0008] 3. The traditional way of drawing a wind vector pole is a drawing of a static image, which cannot express the sense of movement of the wind field

[0009] 4. In terms of meteorology, except for mesoscale typhoon systems or large-scale subtropical high and low pressure weather systems, which can be seen from the drawings drawn by wind vector poles, other small-scale airflow disturbances are difficult to be intuitively Perceived or not displayed on the screen at all due to subsampling

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