Global weather simulation method based on particle system

Abstract

The invention provides a global weather simulation method based on a particle system. The global weather simulation method comprises the steps of 1, establishing a main region; 2, determining the current region for particle motion, wherein the current region is a particle generation region, a new particle begins to move after randomly appearing on any point on the upper end surface of the current region; 3, when a virtual camera moves or rotates again, determining the current region for particle motion again. According to the global weather simulation method, the main region for wrapping the camera is provided, then, the current region for particle motion is determined according to the main region and the moving or rotating direction vector of the virtual camera, the global weather is simulated only within the current region, and a visual cone is contained in the current region, so that an abundant variable true weather effect is brought for a user, meanwhile, the operation expense of a CPU (Central Processing Unit) is reduced, the program and system operation efficiencies in a weather simulation process are increased, and the special effect design and manufacturing costs are reduced.

Description

【Technical field】 [0001] The invention relates to a particle system-based global weather simulation method. 【Background technique】 [0002] In 3D games, traditional weather effect simulation schemes mostly use full-screen light effects, which is to use art production tools (such as 3dmax or maya) to create weather-simulating particle effects, and then pre-render them into flat animations, which can be played repeatedly in the game , in order to achieve the purpose of creating weather effects in the game scene. This technique is like putting a piece of transparent glass in front of the camera, and several changing pictures are repeated on the transparent glass. Players can only see a pre-rendered art effect without other changes. If you want to maintain long-term changes, you need to pre-render a large number of single-frame images, and each texture supporting these images needs to cover the entire screen. Therefore, the memory consumption is very large. [0003] Another i...

AI Technical Summary

Problems solved by technology

Players can only see a pre-rendered art effect without other changes. If they want to maintain long-term changes, they need to pre-render a large number of single-frame images, and each texture supporting these images needs to cover the entire screen. Therefore, the memory consumption is very large

[0003] Another improvement is to use real-time particle systems directly in the game scene instead of using pre-rendered animations, which solves the problem of lack of changes in pre-rendered animations, but simply uses particle systems to simulate real weather, such as blizzards, rain, Wind and sand, etc., require tens of thousands of particles in the scene, and the movement of each particle within its lifetime needs to consume CPU calculations. Too many will inevitably bring additional overhead and affect the operating speed of the system.

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