Dynamic generation method of virtual coal mining scene based on 3D entities transformation and combination

Abstract

In order to present the virtual scene of underground coal mining, a dynamic and data-driven method for the virtual scene generation was proposed and its experimental software was developed. The data model of the software system is classified as two types that are the primary model and the display model. The system structure is designed as four layers from bottom to top, namely storage layer, display layer, combination layer and operation layer. Storage layer, the lowest layer and the data center of the system to store all the primary models, is a database containing some data tables, views, constrains, rules and storage processes. Display layer as the second lower layer is to implement an essential data-driven algorithm to transform the selected primary models into display models through scaling, stretching, rotating or assembly operations. Combination layer focuses on the whole scene building business based on the operation of related display models such as visible setting, connecting, handling the shading and presenting special effects. Operation layer as the top layer is to respond to user’s instructions such as free roaming and screen pickup. Finally, the software is tested in Qinan colliery of China. Results show that the proposed method is practicable and efficient to implement virtual coal mining scene.