Abstract
The geometric modeling languages for virtual reality could be classified into graphical modeling languages and script modeling languages. The graphical modeling languages are easier to use, but difficult to ensure the precision of 3D models. While the script modeling languages are so complex that harder to be coded by programmers. In order to address the above problems, this paper proposes a novel virtual reality modeling language Apla+VR, which not only combines into our original abstract modeling language Apla, but also extends a new function of constructing 3D models of virtual reality systems conveniently and abstractly. Meanwhile, the correctness of Apla+VR programs also be ensured by using PAR method and theory of FMDE (Formal Model-Driven Engineering). Furthermore, a code generator called Apla+VR → MAXscript, could translate abstract Apla+VR programs into MAXscript scripts, which can be complied in 3DSMax engine, and then be created into 3D models effectively. Finally, it is proved that Apla+VR and its tools can increase the efficiency and reliablility of developing 3D models through a case study of the minimum sum problem virtual reality system.
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