桥梁三维造型及其视景仿真

Research on three dimensional-modeling and scene simulation

研究在计算机上实现桥梁三维造型和视景仿真的关键技术。以面向对象理论为基础,在VC++平台上结合OpenGL图形库开发仿真应用系统。根据桥梁结构的特点,确定以扫描法和参数化特征造型为桥梁模型的主要造型方法,半边数据结构为模型的数据结构。提出设计成果共享的3个层次,基于数据库的设计是共享的最高层次,建立标准构件数据库和常用数据构件库。研究结果表明仿真系统能实现对场景真实感图形的绘制和实时漫游,为场景增加了材质、光照及纹理等效果;实现了漫游的平移和采用四元组表达的旋转控制。

The key technologies of realizing bridge 3D-modeling and scene simulation were studied on computer, and the simulating application system was developed at VC++ platform combining OpenGL graphic library based on objected-orient theory. According to the characteristics of bridge, the methods of sweeping and parameter feature model were determined as the main methods of the bridge 3D-modeling's, half-edge data structure as the data structure of the model. Then, three levels of sharing design production were proposed and the database based design was the highest, the bridge standard components database and conventional components database were constructed. The results show that simulating system can realize scene realistic image render and real-time roaming, land increase special effects of materials, lighting and texture on scene, and realize moving control and rotation control by quaternion during roaming.