Construction And Research Of Knowledge Tree Based On Virtual Reality Technology

Due to its strong interactivity,high immersion and multi-sensitivity,virtual reality technology is widely used in various teaching scenarios.However,the rapid growth of educational information resources can easily lead to the overload of knowledge content.The complex and disorderly fragmented knowledge can easily lead to the problem of knowledge load in the learning process of students.The traditional teaching mode has problems such as poor interaction and limited safety factor.Therefore,this thesis proposes to build a knowledge tree system platform,realize the three-dimensional visualization of the knowledge tree content through virtual reality technology,display the original teaching knowledge content in multiple dimensions,and assist in adding course content experiments,effectively strengthening students' knowledge perception ability and improving learning efficiency.The main work and conclusions completed in this thesis are as follows:1.The feasibility of applying the knowledge graph in virtual reality scenarios is studied,the functional requirements of the virtual reality knowledge tree system are proposed,and the overall system architecture,information database and operation interface are designed.The functions cover modules such as scene roaming,knowledge tree display,content learning,experimental simulation,and system publishing.2.Build a virtual reality scene model based on 3ds Max and Unity3 D,use the PLSA algorithm to automatically build a three-dimensional knowledge tree,the hierarchical layout of the trunk represents the distribution of the knowledge structure,through the instantiation of the trunkbranch-fruit prefab,combined with the interpolation algorithm,it can be based on resources The number and relationship automatically generate the knowledge tree model,and automatically adjust the parameters to make the tree model reach a balanced state.3.An improved Resource.Load dynamic loading resource method is proposed to retrieve knowledge content data of the resource library to form a curriculum knowledge tree;and introduce the content display scene of the knowledge tree for immersive experience subject content learning and experimental simulation.Asynchronous loading through multi-threaded Thread class method4.Designed and developed a virtual reality knowledge tree system through the Unity3 D engine,completed the visualization of the knowledge tree of multiple courses,and passed a large number of use case tests to verify the system from a functional and non-functional perspective.