Research On Cutting And Optimization Method Of Complex 3D Model For 3D Light Field Display

With the gradual improvement of people’s requirements for the realism and resolution of scene viewing,computer graphics and display technology continue to develop and improve,presenting a real visual experience in a better way.In specific viewing scenarios,conventional two-dimensional(2D)display devices can no longer meet people’s needs,and people turn to more realistic three-dimensional(3D)light field display devices.Compared with conventional displays,3D light-field displays can provide a more realistic and stereoscopic visual experience without wearing additional equipment,which has attracted a lot of attention.However,in order to obtain a more realistic experience,the complexity of displaying scenes and models is gradually increased.This will take up more computing resources and greatly increase the time required for rendering,which is a great challenge to the current computer rendering performance.(1)Vertex curvature-based edge-folding simplification method is proposed for mesh simplification.This method improves upon the classic edge-folding simplification algorithm by adding a constraint factor related to curvature,which enhances the retention of the model’s original features.The optimized method reduces the average geometric error of the simplified mesh by over 30%compared to the classical algorithm.(2)A continuous level-of-detail(LOD)technology based on quadtree is proposed for the rendering of 3D models.When using OSG(OpenSceneGraph)for rendering,a quadtree node structure based on the model data is constructed according to the parameters of the 3D light-field,achieving the effect of smoothly displaying the 3D model data on the 3D light-field.Experimental verification is conducted to confirm the effectiveness of the proposed approach.Rendering of 50 viewpoints is performed on the 3D light-field display with a resolution of 3840×2160,successfully demonstrated a 3D model generated from oblique photographic data of about 70G,and achieving a fluency of more than 40 frames per second,satisfying the demand for real-time loading of large-scale 3D model data on the 3D light-field display device.