Research On The Key Technology Of Force Feedback Children's Games

Haptic technology is one of the greatest technological innovations in 21st Century,and it is different from previous two dimensional and usually visual and auditory based human-machine interaction technology.Example:a keyboard,a mouse.Compared with the traditional one,it provides users with a more natural and intuitive way of human-machine interaction based on force and touch.Educational games,integrating education and entertainment together,are the research focus in the field of Educational Technology.Educational games together with haptic technology,users are allowed to interact with the virtual game scenes generated by computer through haptic devices.Meanwhile,users can perceive the movement of objects in the scene,and get the tactile experience which is consistent with the real world.This paper focuses on the key technologies in the process of integrating haptic into education games,including real-time collision detection,force feedback information processing,and synchronous display of haptic information and graphic information.Here are the main works of this article.1.Collision detection.When there are many objects in the scene,the time required by the collision detection in the game interaction will increase sharply,which will cause a reduction in real-time interaction.Therefore,this paper adopts a two-phase method,the fuzzy collision detection phase and the fine collision detection phase.First,in the fuzzy collision detection of the first phase,obtain the information on position and motion of objects in the scene and check whether there is a collision.Then,determine whether to implement the next phase according to the collision detection results in the first step.Only if there is a collision,the fine collision detection will be implemented.Finally,get the collision detection result:the collision position between the objects or no collision detected between them.2.Haptic processing.As children are interacting with game scenes through the haptic device,a mass of haptic information can be generated in the application,and how to process these information plays a direct part in the tactile experience of children.First,on the basis of the collision detection results,get the collision point between the haptic device and objects.Then,get the motion.information of the objects involved in the interactive process,including the velocity and direction of objects.Finally,according to the mass-spring model and the motion law of the physical motion,design the appropriate haptic model to stimulate different effects of force.3.Multi-channel information synchronization.In order to make the interaction experience in the game consistent with the real world,the application needs to maintain the synchronization between visual information and haptic information during rendering.Given the the big difference of refresh rates between visual information and haptic information,30-60Hz/s and 1000Hz/s respectively.Therefore,this paper need to adopt a cooperative mechanism to achieve synchronization.First,build two threads,one for the processing of visual information and the other for haptic information,therefore both visual information and haptic information can be processed according to its own the refresh rate without data corruption.Secondly,establish a map between movement space of haptic device and 3D graphical rendering space.Finally,when rendering,obtain the haptic information and graphics information stored in the last step at the same moment.Based on the above research contents,this paper design a game:Comprehension of natural numbers,including theirs interfaces and functions to show how haptic technology works in educational games.