Research On Mesh Real-time Refinement For Mobile Terminals

With the increasing demand of3D applications from mobile terminals, such as3Dgames, Human-computer Interaction, Virtual Navigation and so on, the mobile real-time3D graphics has become an important research domain in the computer graphics in recentyears. However, mobile devices have a low CPU computing speed, small memory capacity,limited bandwidth, weak GPU performance and limited power supply capacity and time ofbatteries. So seeking the graphics rendering solution to obtain realistic and fast renderingresult of3D models with less memory footprint is the critical problem in mobile3Dgraphics，and due to great differences between mobile terminals and PC platforms,existing PC research theories and technologies is not fit for mobile terminal very well, sothat the work has a profound significance and extremely challenging.To achieve quick and realistic rendering of3D model in mobile terminals, thisresearch work is launched from the following aspects:To begin with, design a general adaptive mesh template.3D model patches arerepresented by their vertices and parameter refinement templates, which implements thereuse of vertices in refinement templates and reduces the usage of memory. The vertexbuffer object technology is employed to store refinement templates in GPU, which can beread from GPU directly when rendering and thus saving the CPU-GPU bandwidth.Secondly, research current crack eliminating means of the multi-resolution modelrendering and analyze their shortcomings. The mean that eliminate cracks by offsettingparametric barycentric coordinates is proposed and combined with the general adaptivemesh refinement template, the self-adaptability of multi-resolution mobile modelrendering is improved from bipartite form to integer form.And then, the screen space refinement measurement introduced in the curvature is putforward on the basis of the refinement measurement algorithm widely used recently. Therefinement levels calculated by the screen space refinement measurement are adjusted tokeep consistent with the rendering results of screen space refinement measurement withlargely reducing the patch size based on the curvature.Finally, the mobile terminal mesh real-time refinement system for the mobile device graphic standard OpenGL ES2.0rendering pipeline is designed and implemented, and theproposed method and system are verified with experiments and analyzed.