The Study And Application Of Human-computer Interactive Pen Which Is Used On Virtual Reality

Human-Computer Interaction is the system which is made up of computer,human,interactive device,input and output devices and interactive interface,and more Human-Computer Interaction device play a very important role in the system.The devices of Human-Computer Interaction had been developed from traditional mouse,keyboard to two new kinds of technology,Data Glove and Interactive pen.Since the degree of freedom of traditional Human-Computer Interaction devices is limited,the new interactive devices are complex to design and implement,and there is still relatively scarce Pen-based interaction device applied for Virtual Reality Scene.Therefore,this paper will put forward and realize a kind of Human-Computer Interaction which is used on Virtual Reality Scene and realizes its application on virtual reality scene.There are following four main working for this paper:First,put forward a kind of Human-Computer Interactive pen which is applied for reality on the basis of Human-Computer Interactive technology.This kind of Human-Computer is made up of two parts,one is Entity Interactive pen,the other one is Virtual Interactive pen.This paper will analyze new type of Human-Computer Interactive pen and its principle of interactive mode to build coordinate and construct interactive pen model which has this character.What's more,to analyze the hardware and software system platform those need to be used on system to make a foundation for the later research and application.Second,on basis of the building of Entity interactive pen,making deeper study of Quaternion Solver attitude angle Algorithm,the Discrete Kalman filter principle and Extended discrete Kalman filter principle,the solver attitude algorithm which is combined quaternion difference with EKF algorithm.The experimental results show that through this kind of algorithm,it proofs that the stability of Human-Computer stationary state azimuth attitude angle rising 0.6576%.The stability of low speed state azimuth altitude angle rising 0.5178%,At the same time we can use the PC and lower position machine to realize the real-time communication between entity interactive pen and Virtual Interactive Pen.Third,on the basis of three-dimensional visualization of OpenGL,through leading-in and rendering 3D model,adopting different kinds of matrix transformation,specify color,light setting,texture mapping,programmable shader etc.,to render a lifelike virtual reality scene,to be regarded as the visualization virtual interface of Human-Computer Interactive.There will build a piece of virtual control pen which is corresponding to Entity interactive pen in virtual reality scene.Forth,analyzing the principle and defection of method of classic ray pickup,the advantages and disadvantages of traditional bounding volume strategy to given shaping judging of threshold strategy.At last,through the combination between new type of Human-Computer Interactive method and improved bounding volume strategy to realize the more accurate and fast picking up of 3D model.The experimental results show that the Algorithm proposed on my paper increase the speed of picking up model,the speed will be increased 16.66%,at the same time the false positives of picking up of 3D model adjacent module edge will be deduced from 71.26%which is the false positives of picking up on single bounding volume to 12.8%.By studying the work of this paper,we achieve the constructing model and the application of the new pen of human-computer interaction.Putting forward solver attitude algorithm which is combined quaternion difference with EKF algorithm,and improving the stability of the space attitude angle of human-computer interaction effectively.Then we set up a lifelike virtual reality scene,and adopting improved bounding volume strategy to achieve the more accurate and fast picking up of 3D model,there are some practical value.