Study Of Virtual Chemistry Experiment Platform Based On OSG

Virtual experiment is based on the needs of modern education concepts generated, has played a role in intelligent guidance and teaching management. With virtual reality technology and the constant teaching mode change, the contradiction between the requirements of the current chemistry experiment teaching and the existing limitations due to objective conditions caused by the shortage of the experimental part is growing more and more. However, the available virtual chemistry experiment platform currently are based on two-dimensional graphic design and experimental results is not enough visual image; the study of three-dimensional virtual experiments are only remaining on the framework exploreing and the achieving level of the key technologies.This paper objectively analysis of the existing platform for virtual chemistry experiments, based on the technical characteristics of OSG (OpenSceneGraph) with the tool of open-source scene graph, combined with a variety of key technologies of virtual experiment, studyed and designed of the three-dimensional virtual chemistry experiment platform. The experiment platform breakthrough the previous chemistry experiment platforms in intelligent and scalable constraints, in flexible operation and the experimental results have made a very good experiment results, furthermore provides a timely, effective support for the study of chemistry experiment. The main research work of this paper are:(1)The framework, the process realization and the functional structure for virtual experiment were given by using the software OSG. The key technologies of virtual experiments were studyed and applied in the virtual chemistry experiment platform.(2)The chemical reaction phenomena and processes were studied, and the chemical modeling was proposed on the virtual components modeling.The intelligent identification mechanism of chemical experiment was put forward, and the combination with the instruments, the medicaments of the experiment, the reaction conditions and the matching equations were discriminated comprehensively, then the identification the type of experiment intelligently and rendering results for the experiment were realized. In particular, the fuzzy evaluation mechanism was studyed, and the comprehensive fuzzy evaluation function of the virtual experiment operations results was provided.(3)In the virtual chemistry experiment platform for operations, operating experiment and observation experiment results wre conducted under a different view. The flexible manipulation methods was achieved to manipulate the virtual entity in the scene including picking up, draging and combination, and the assembly way was realized of the combination of virtual experiment instruments and chemicals in the scene. The feasibility of the experiment platform was proved by using a series of examples, the operation flexibility and design superiority of the platform were proved by comparing the platform with other platforms. Finally, the development of virtual chemistry experiments were prospected.