Fluid wind field graph rendering method in three-dimensional scene

Abstract

The invention relates to a fluid wind field graph rendering method in a three-dimensional scene, and the method comprises the following steps: 1), starting to render a model: according to a current three-dimensional scene vision field and obtained wind field data, the wind field data is grid data divided by equal step length longitude and latitude, and each grid point has a longitude lng, a latitude lat, a speed value speed and a direction value dir; the vector value u in the transverse direction and the vector value v in the longitudinal direction are calculated according to the following formula: u =-speed * sin (dir); v is equal to-speed * cos (dir); (2) a chessboard grid model is generated according to the wind field data, grid model objects comprise peripheral boundary values xmin, xmax, ymin and ymax, the row number Cols and the column number rows of grids, and each chessboard grid has the following data of the corresponding row x, the corresponding column y, the longitude lng, the latitude lat, the transverse direction vector value u and the longitudinal direction vector value v; and step 3), generating a plurality of random particle data according to the wind field range, wherein each particle data has attribute data including initial coordinate longitude lng and latitude lat.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional image modeling, and in particular relates to a method for rendering a fluid wind field graph in a three-dimensional scene. Background technique [0002] 3D rendering technology has developed rapidly with the development of mobile Internet applications. The Chinese patent "A 3D Rendering Method and System for Large Scenes" (Application No. 201710772069.X; application date 2017.08.31) discloses a 3D rendering method. It is mentioned that the electronic map adopts 3D rendering. The rendering data required for the three-dimensional rendering of the scene is dynamically loaded into the memory; the preset rendering acceleration rule corresponding to the currently to-be-rendered scene is determined, and according to the preset rendering acceleration rule, the rendering thread is invoked to 3D rendering of the object to be rendered. It proposes a scheme in which multiple rendering objects are ...

AI Technical Summary

Problems solved by technology

However, this rendering solution works well for static objects in practical applications. For dynamic objects, the accuracy of fluidity simulation in actual rendering needs to be improved, and the user experience needs to be further improved.

The Chinese patent "Scene Rendering Transition Method During the Movement of 3D Large Scenes" (application number 201810288385.4; application date 2018.04.03) discloses a 3D scene rendering transition method, referring to the rendering methods used by Baidu Street View and Google Street View, It is proposed to map the 3D model after the 3D model is built, which can more smoothly transition the scene rendering during the movement process. However, how to divide dynamic objects with multi-changing characteristics and attributes such as wind field maps with high precision , How to high-precision numerical simulation does not give an implementation plan

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