Research On Key Technologies Of Virtual Reality Complex Scene Optimization Based On CAVE System

Virtual Reality(VR)technology provides effective technical support for the intervention training and adjuvant treatment of children with autism spectrum disorder by virtue of its high immersion,natural interaction,and rich imagination.However,due to the particularity of children with autism,it is necessary to adopt natural guidance methods for interactive training,which can minimize the disgust and rejection of communication behaviors of children with autism.Therefore,this thesis needs to use virtual role technology to give the virtual role the characteristics of autonomous behavior,so that children with autism can learn daily life skills in the virtual environment without difference in the real environment.In addition,the multi-projection surface immersive virtual reality display CAVE system has an interactive environment covering a full range of vision,which can bring an unprecedented sense of immersion to children with autism.However,in order to meet the highly realistic virtual situation,most of the constructed 3D models are delicate and complicated,especially under the limitation of hardware conditions,it is easy to cause the phenomenon of screen freeze.Therefore,it is necessary to optimize the complex scenes of virtual reality to meet the real-time rendering and interaction requirements of the CAVE system.Based on the above analysis,this article takes the “virtual reality technology to treat children with autism” project as the background,and provides realistic,immersive,contextual,safe and controllable virtual intervention treatment scenarios as the main research line,and builds a three-dimensional realistic virtual situation.Modeling technology,virtual character technology that naturally guides interaction,and key technologies for optimization of virtual complex scenes that support real-time rendering and rendering have carried out methodological research and achievement realization.The main research content is summarized as the following four points:(1)Three-dimensional modeling technology.Analyzed the general modeling method and modeling process of the virtual situation;focused on describing and researching the 3D modeling method(static)of the intelligent character to make it have a realistic geometric appearance.(2)Virtual character technology.Give the virtual character a multi-channel perception model,so that the autonomous virtual character has real behavior characteristics(dynamic);and properly control the motion logic of the virtual character through the finite state machine and event-driven mechanism..(3)Virtual complex scene optimization technology.Briefly analyze several complex scene optimization algorithms;focus on the key technical issues of virtual complex scene optimization;finally verify that the grid segmentation,simplification and field of view refinement techniques are used to optimize the grid generation speed and surface of virtual scene Detailed characteristics.(4)Verify the comprehensive experimental effect using CAVE as the interactive experience platform.The autonomous virtual character technology,event-driven mechanism,and key technologies for optimizing virtual complex scenes are integrated in the virtual environment of the playground for experimental verification,and the data of its screen fluency,visual fidelity,experience evaluation,etc.are comprehensively analyzed,and finally obtained A satisfactory experimental result.