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Abstract
A procedural modelling method based on model combination and spatial semantic constraint is proposed to realize the automatic modelling of high-speed railway scenes for management decisions and scientific experiments at different stages. The construction and description of basic-element models were first discussed in detail according to the fixed characteristics of the geometric appearances of and the spatial relationships between the components of high-speed railways. Then, spatial semantic constraint rules and scene mapping and instantiation methods were designed to accurately and rapidly integrate various basic-element models for automatically generating high-fidelity three-dimensional high-speed railway scenes. Finally, a prototype modelling system was developed to implement preliminary experiments. The experimental results show that the method proposed in this article is suitable for the automatic generation of virtual high-speed railway scenes by combining sophisticated basic-element models in a seamless manner. Modelling operations and professional knowledge are decoupled to reduce the complexity and difficulty of multidisciplinary collaborative modelling, which improves the modelling efficiency of virtual high-speed railway scenes.
Acknowledgements
This research is partially supported by the National Key Basic Research Program of China (Grant No. 2015CB954101), the National Natural Science Foundation of China (Grant No. 41271389, 41271402 and 41401433), the National High Technology Research and Development Program of China (Grant No. 2015AA120101) and the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT13092). The authors thank three anonymous reviewers and editors whose comments have notably improved the manuscript.