| With the development of Computer Graphics science and Virtual Reality tech-nology,the area of virtual display three-dimensional solid model has been more and more complex to generate and operate three-dimensional solid.And require a higher computing speed,transferring rate and real-time displaying three-dimensional.Thus,the simplified method of displaying virtual three-dimensional solid model has become a new research area.Vertex deletion method is a simpler and more effective geometric elements-delete method,but this method only focus on the uniform of geometry and ignore the impact of changes in visual normal produced,but also it is not efficient in reconstruction of triangular surface.This thesis simplified start a meaningful exploration of Model Simplification,and researched the three-dimensional graphics library of OpenGL,combines the advantages of OpenGL and 3D rendering tools named Maya,president a method of import a three-dimensional OBJ file into a software,which is developed based on OpenGL.On this basis,we focuse on the vertex deletion algorithm.Points out the shortcomings of the algorithm,and analyze its causes,and president the vertex normal delete simplified algorithm on the basis of improving the algorithm,store the vertex normal vector information in the vertex data,and reconstruct triangle based on vertex vector directly.Meanwhile,upon Visual Studio 2010 platform,developed a model to model simplification software combined with the excellent three-dimensional graphics library OpenGL,and integrated the algorithms of delete vertex normal vector and the algorithms of vertex deletion into the software.This software can handle models which are OBJ file format,and has a simple human-computer interaction and rendering functions.Experimental results show that the model-simplified software we develop based on OpenGL can success import OBJ files,and the new vertex normal deletion algorithm is faster than the original algorithm,and not have a significant disadvantage on display.This model-simplified software achieves our research purpose and running perfect. |
