Real time rendering multi-thread distribution and control method of three-dimensional geographical information system

Abstract

The invention discloses a real time rendering multi-thread distribution and control method of a three-dimensional geographical information system, comprising: first rendering processing line characteristics, coordinating the cost in a whole real time rendering process based on data characteristics of a three-dimensional city model, uniformly considering data loading cost and pixel rendering cost, and organizing data of the three-dimensional city model; based on characteristics of three-dimensional city model data and application, employing CPU multi-thread to distribute loading and rendering tasks and GPU multi-thread to distribute core threads based on summit and pixel data processing; and dynamically adjusting CPU thread resources and GPU processing threads and buffer memory distribution through real time resource monitoring in order to realize a high utilization rate of CPU and GPU resources and rendering instantaneity and stability.

Description

technical field [0001] The invention belongs to the technical field of geospatial information systems, and more specifically relates to a multi-thread allocation and control method for real-time rendering of a three-dimensional geographic information system. Background technique [0002] When people use tools such as GoogleEarth, NASAWorldWind, and MicrosoftVirtualEarth to roam the earth images, a new way of browsing has shocked ordinary people, allowing people to get to know the world we live in without leaving home. Screen to see what that dream spot looks like. However, with the development of human activities, seeing our world only from images, due to the limitations of its limited viewing angle, shadows, buildings and other factors, gradually cannot meet people's requirements. People are more expecting that various objects in daily life will be reproduced in virtual reality, so that people will have an immersive feeling. And it requires people to be able to interact w...

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Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a multi-thread allocation and control method for real-time rendering of a 3D geographic information system, aiming at the problem of difficult dynamic scheduling of model data during real-time roaming rendering in a large-scale 3D city model , starting from the rendering process itself, aiming at real-time rendering, reflect the cost of data loading and primitive rendering into the organization and storage process of the 3D urban scene model, and dynamically adjust the multi-core resources of the processor based on the cost of real-time monitoring, Achieving a balance between the loading process and the drawing process

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