Adaptive scheduling method for 3D city model

Abstract

The invention discloses a three-dimensional city model self-adaption scheduling method, and belongs to the field of three-dimensional digital city and three-dimensional geographical information systems. By means of the three-dimensional city model self-adaption scheduling method, regular gridding indexes are graded, the grading thinking is adopted, the two grades including the fine granularity and the thick granularity are used, the regular gridding indexes are respectively constructed, the problem of scheduling disorders of three-dimensional models in different sizes is solved, and the scheduling efficiency is improved. The self-adaption scheduling method is provided by calculating model request importance degree factors according to the distance between the centers of the models and a current viewpoint, the sizes of the models themselves, and the current states of the models, the model request time, the model request time number and the model request importance degree factors are sufficiently considered to conduct dynamic adjustment, and the high efficiency and the vision coincidence of dynamic adjustment are accordingly achieved. Compared with the scheduling method that only the viewpoint distance is considered, the model scheduling process of the three-dimensional city model self-adaption scheduling method is high in response speed and smooth, and the good view effect is achieved; meanwhile, asynchronous collaboration between scheduling threads and rendering threads is achieved, and therefore the scheduling efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the fields of three-dimensional digital cities and three-dimensional geographic information systems, and in particular relates to a three-dimensional city model adaptive scheduling method. Background technique [0002] The 3D digital city is based on computer technology, multimedia technology and large-scale storage technology, with broadband network as the link, using remote sensing, global positioning system, geographic information system, telemetry, simulation-virtual and other technologies to carry out multi-resolution, Multi-scale, multi-time-space and multi-type three-dimensional description, that is, to use information technology to digitally realize all the contents of the city's past, present and future on the Internet. [0003] Through the three-dimensional expression of basic geographic information such as topography, ground and underground artificial buildings, etc., it reflects the three-dimensional spatial positio...

AI Technical Summary

Problems solved by technology

Due to the limited hardware of ordinary computers, the existing scheduling of 3D city models is slow and inefficient. Therefore, how to efficiently schedule massive 3D city models has become an urgent problem.

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