Construction Of Super-large Terrain Modeling Based On MultiGen Creator

Realistic rendering of 3D terrain scenes has two aims,which are reality of rendering and real-time of rendering.It should maintain higher interactive frame rates without noticeably degrading image quality. However,Virtual reality communities and other visualizations have always faced the problem that their"desirable"visualization dataset sizes are much larger than what the hardware can display at interactive rates.Therefore,in order to ensure the high-quality graphics in VR display real-time,how to reduce the complexity of the graphics screen in the way of software,at the same time guarantee the accuracy of 3D scenes have been one of the main objectives of concreting a VR scene。The significance of optimizing techniques for the 3D scene model based on MultiGen Creator is to provide an effective and efficient way to solve the contradiction between the quality and the speed of graphical display.Firstly,the research actuality about model optimization and 3-D terrain generation algorithm is summarized.Secondly,this paper puts out some principles about how to product Discrete LOD model data referencing the results of previous studies and the experience gained during the work.Finally,this paper sums up some strategies on how to optimize model data library referencing the results of the experience gained during the work.Optimizing techniques based on model attributes are focus on the optimizing of texture.Appropriate size and format as well as some texture techniques such as billboard help debase the EMS memory.Besides,appropriately organizing nodes,and LOD,Instance,External nodes ale used to effective optimize the hierarchy structure of the database.Then compares with the original system in the document,the load time,the EMS memory and so on.A conclusion is draw that these optimizing techniques adopted are feasible and necessary for real-time systems.