Railway line three-dimensional rapid modeling and dynamic updating method

Abstract

The invention discloses a three-dimensional rapid modeling and dynamic updating method for a railway line. The three-dimensional rapid modeling and dynamic updating method comprises three steps of rapid model construction, determination of a minimum influence domain and dynamic model updating. Wherein in the rapid model construction process, a model is subjected to decoupling processing, discrete cross section data is utilized, a discrete circuit primitive model is constructed, in the construction process of the circuit primitive model, a geometric shader and parallel computing are introduced, geometric data are rapidly expanded, and a plurality of primitive models are processed and constructed at the same time; and then, managing the line primitive model through the railway line three-dimensional model scene tree, completing the mapping relation of the line based on the model name and the storage position of the line by using the hash table, and updating the railway line three-dimensional model according to the minimum influence domain criterion when the line space position is modified. According to the method, the technical means of parallel computing, GPU collaborative modeling, self-adaptive three-dimensional model local updating and the like are adopted, rapid construction of the railway line three-dimensional model is achieved, and when line data are changed, the three-dimensional model can respond rapidly, and dynamic refreshing is achieved.

Description

technical field [0001] The invention belongs to the technical field of traffic construction, and in particular relates to a three-dimensional rapid modeling and dynamic updating method of railway lines Background technique [0002] The three-dimensional line design can be combined with the real terrain. In the process of line design, a real model of the line design results can be quickly constructed, which is convenient to fully consider the influence of topography and geology on the horizontal, vertical and horizontal design of the line, and improve the quality of the design results. , an important means of digital upgrading. The reality 3D modeling technology is the foundation and core technology of 3D design. Therefore, all scientific research institutions and design institutes are actively exploring 3D modeling methods for railways and highways. After more than 20 years of exploration, rich research results have been achieved in the fields of terrain modeling, subgrade...

AI Technical Summary

Problems solved by technology

Therefore, when the static overall modeling technology is applied to 3D design, it mainly faces the following two problems: first, the modeling speed is slow. It takes a long time, especially when modeling long line projects

Second: It is difficult to dynamically modify the model

As a whole, the circuit has an associated coupling relationship between each part. Modifying the part will cause the whole circuit to change, and the 3D model will also change accordingly. The overall reconstruction consumes too much computing resources and takes too long to reconstruct.

[0004] The 3D design of railway lines has become an important springboard for railways to become intelligent and informatized. However, the slow modeling speed and the difficulty of updating and modifying models restrict the development and application of railway 3D visual design. modulus and dynamic update method to solve this problem

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