Efficient particle cloud drawing method in flight scene simulation

Abstract

The invention provides an efficient particle cloud drawing method in flight scene simulation. The method comprises the steps that 1) a particle cloud model library based on a bulletin board is constructed; 2) a circular area with the center of a viewpoint position is used as a visible area, and an area covered by a grid outside the visible area is used as a reserved area; 3) when a cloud block enters the visual area and the cloud block does not contain particle data, a cloud model is randomly selected from the particle cloud model library to generate the particle data of the cloud block based on the cloud model; when the cloud block moves away from the visual area and is located in the reserved area, the particle data are not deleted temporarily; when the cloud block moves away from the reserved area, the particle data are deleted; and 4) particle collection, sorting and drawing are carried out. The method can be used in flight scene simulation and a large-scale outdoor virtual reality system. The method can realize efficient cloud drawing, can simulate a variety of cloud morphology, and has a good simulation result.

Description

technical field

[0001] The invention relates to the fields of computer virtual reality, visual simulation technology and computer graphics, in particular to flight visual simulation, and in particular to an efficient particle cloud drawing method in flight visual simulation. Background technique

[0002] The aircraft flight visual simulation system uses high-fidelity three-dimensional images or scene simulations to reproduce the flight process of the aircraft, mainly including scene simulation models, multi-day, multi-weather environment and its changes, etc. Visual simulation. The scene simulation model refers to all the model structures involved in the flight environment simulation, such as various 3D models of terrain, airports, buildings, aircrafts, etc. Visual presentation in environments such as , rain, and snow.

[0003] Cloud effects are an important part of outdoor scenes. In most real-time rendering systems designed for small-scale scenes or scenes with viewpoints...

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