OpenGL在自然对象真实感图形生成中的应用

针对自然对象不规则的几何形状,介绍了分形几何在其数据建模方面的优势和基本思想,并以山脉地形为中心阐述了以fBm方法为基础的几何数据模型生成算法。探讨了OpenGL在以山脉地形为代表的自然对象真实感图形生成过程中的基本用法。对于在分形几何对象图形渲染过程中,OpenGL默认的法矢量计算函数无法正常运行的问题,引入了行之有效的求取算法。最后通过计算机模拟实验对整个过程算法过程予以验证。

Methods of building the realistic graphics of natural objects with fractal feature using OpenGL

The advantages of fractal geometry in representing natural objects with scrambling features and building their geometric models were introduced and the methods of producing the geometric data models of the natural objects based on fBm with mountain were exemplified. Then, how OpenGL was applied to display and render the realistic graphics of the mountain terrain was investigated. Because of the fractal features of the mountain terrains, the default function of OpenGL that could be used to compute the normals of the surfaces of the fractal models was ineffective. Thus, an effective method to remedy the flaw above was suggested. In the end, in order to prove the validity of the methods above, a prototype program was developed and a few vivid graphics produced by the program were displayed.