Based On Light And Shade Processing Algorithm Of Virtual 3 D Scene Roaming Design

We have entered into the tide of informatization as the rapid development ofcommunication technology and computer network technology，and mankind more andmore flexibly understand，master and apply information resources. People are not limitof time and space，who are located in different nationalities and countries all over theworld，and communicate with each other through all kinds of ways such as the Internet，communication network or cable television network and so on，by which humanpromote social development and progress of human civilization.Virtual realitytechnology, which combines multimedia technology, artificial intelligence, computergraphics, real-time computing technology and so on,is widely used in variousfields.Providing users a realistic experience,VR becomes effective means of exploringmovement of things.This thesis studies the feature and a problem of virtual reality technology, closelytoday’s popular virtual scene modeling. We analyze and compare the two virtualtechnologies, researching the technology based on the image in depth, such as theoriesand methods, object-oriented approaches, scenes of transform, light, texture mapping.In this thesis, we offer the following innovation:(1)Use the “combining false andtrue” as a means of building virtual scene, we explore a simple architectural animationapproach and make useful practice,througing combining Computer graphics technologyand computer vision technology.(2)Modeling in the sky, we propose an improvedmethod of spherical thinking. That is to say in the drawing of a spherical sky texturemapping, we can solve texture focus phenomenon caused by mutationing texturecoordinates through rotating spherical coordinates.In this thesis, Author completes designing the virtual scene structure and scenemodel in the Visual C++and OpenGL platform, and definites the methods how to roamin the virtual building.The experiment shows the roaming method of virtual and realcombination is better than the original. It has a great progress than only based on thegeometry in the scene of reality and efficiency. It improved the texture splicing problems occurring at the seams effectively, which reflects the characteristics of virtualreality, and gives the user true feelings.