3D Scenery Recurring Research Based OpenGL

With the development of virtual reality technology, distributing vision calculating, distributing emulator and network 3d game, it is need of 3d scenery in the manner of cooperation and antagonizing. At the same time, it needs the technology of virtual scenery more perfect. This article explores much about aiming at 3d scenery of constructing model and romance of 3d and real time. In the way of constructing model: using the technology of graph based OpenGL, introducing CSG finishing the construct of entity of 3d.What's more, the article takes a type of optimized data structure under of considering maturity, redundance , higher efficiency and the extension. In the virtual scenery, it is very difficult to construct terrain. The system adopts the technology of LOD. It constructs model of several different precision ,it choose pretty model by the distance leaving of eyes. The article uses two kinds of methods construct sky: the technology of based image and geometry gridding vertex rendering. Generally ,there is two ways: cube box and sphericity. On account of disadvantage of them, the article brings forward a new measure to avoid the abnormity. It is different to construct the model between of tree and other things because of the abnormity of its shapes. It is can't construct it using cuboid and cylinder and so on. It takes account of vision, displacing the calculation based vision by two polygen crossing each other.The article gropes for virtual scenery elementarily. In allusion to real 3d scenery, It is important to use the color, texture, shadow to express the scenery.