The Application Of VEGA In Digital Coal-mining Simulated System

In recent years, Virtual Reality (VR) technology has been paid extensive attention in computer field. Virtual reality technology is designing a lifelike virtual environment based on the computer technology, which can access interaction between the user and the environment by use of the essential device.This paper discusses the corresponding technologies related to Virtual Reality(VR) simulation programming during the research, and represents the whole developing process of 'Digital Coal Mine' project based on Multigen Vega technology. The theory of virtual reality technology includes scene optimizing, the rendering of 3D scene, the stereo rendering technology, the interactive technology of virtual reality walkthrough system (such as motion model, collision detection) and the virtual environment building technology, which provide theory to Digital Coal-mining System.We apply and analyze a hybrid Bounding Volume Hierarchies (BVHs) with three bounding volumes (BV), the present BVHs algorithms which select only one BV to build hierarchies has the conflict between BV's briefness and tightness. So the efficiency of this algorithm largely depends on the objects' figures. In the hybrid BVHs presented in this thesis, the nodes in different hierarchy select different BV based on BV's character. We solve the problem that it is complex to build and traverse the hybrid BVHs, so the efficiency rises and the robustness is enhanced.We use Multigen Creator and VEGA to implement the Digital Coal-mining walkthrough system. The implementation of the Digital Coal-mining walkthrough system provides references and methods for implementation of other virtual reality system, such as virtual natural scenery system, virtual city simulation system.