Virtual terrain rendering method for carrying out resource dynamic processing and caching based on GPU

Abstract

The invention discloses a virtual terrain rendering method for dynamically processing and caching resources based on a GPU. The method comprises the following steps: constructing a terrain grid according to a spatial quadtree algorithm; gradually subdividing the terrain and cutting the view cone according to a viewpoint position, and creating GPU end caches for different terrain resources according to the resources positioned by the logic coordinates to realize different shader programs; starting different rendering processes for different resources, and storing the processed resources in a cache opened up by a GPU; writing a shader for terrain rendering to create a drawing instruction for the remaining nodes after terrain cutting, and submitting Draw Call to a GPU to complete drawing. According to the method, the computing power of the GPU is fully utilized, rendering work is submitted to the GPU, processing work of rendering resources is submitted to the GPU to be completed, and therefore resource processing work is greatly accelerated. Meanwhile, a whole set of GPU resource caching and access algorithm is realized, the access performance of resources is accelerated, the rendering performance is further improved, and real-time rendering and flexible editing of super-large-scale virtual terrains become possible.

Description

technical field [0001] The invention relates to the technical field of three-dimensional real-time rendering, in particular to a virtual terrain rendering method based on GPU for dynamic resource processing and caching. Background technique [0002] Virtual terrain is an essential part of building a virtual three-dimensional world. In the fields of games, military, simulation, and GIS, it is necessary to build a virtual terrain close to reality. It is the cornerstone of the entire virtual environment, and it is also the basis for various simulation elements to be carried out. Base. Especially in the fields of military simulation and geographic information, it is often necessary to construct a super-large-scale virtual terrain, and there are also high requirements for real-time editing of the terrain, which brings great challenges to the rendering of virtual terrain. Existing terrain rendering technologies are mainly divided into two categories: [0003] One is to make terr...

AI Technical Summary

Problems solved by technology

This method can handle large-scale terrain, but once the scale of the terrain is too large, since the preparation and update of resources are completed on the CPU side, for a lot of rasterized data, due to the huge data volume and the limited computing power of the CPU, Therefore, the GPU can only wait for the CPU to complete the data processing, which greatly wastes the computing resources of the GPU.

At the same time, excessive resource transmission between the CPU and GPU will quickly occupy the PCI-e transmission bandwidth, resulting in a rapid decline in rendering performance

It makes the rendering and update of the terrain slow, and cannot meet the real-time requirements of many fields

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