Intelligent Sandbox For Teaching Based On Augmented Reality Technologies

Augmented reality is evolved from virtual reality and has mature applications in military,entertainment,tourism and education.In the traditional teaching activities,the curriculum of classroom teaching is relatively simple,and there is a lack of realism and visualization.The combination of augmented reality and teaching activities can create an immersive learning environment for students,which can improve teaching efficiency and enhance students' learning enthusiasm and promote learning outcomes.???? On the Unity3 D platform,augmented reality and geography teaching activities are combined to design and implement an intelligent sandbox teaching demonstration system.The system has basic functions such as deep data processing,projection matrix transformation,terrain rendering,fluid simulation,physical characteristics,adding game objects along the slope,changes in sunshine angle,and keyboard interaction.The infrared depth sensor is used to scan the terrain of the solid sandbox,and the depth data is converted into a color image according to the depth gradient,which is projected onto the sandbox by the projector.The image gradually shows the continental shelf,coast,land,lake,river,hill,snow mountain and other landforms as the depth of the sand changes.Students can pile up common terrain such as steep slopes,mountains,ridges,valleys and cliffs on the sandbox.Students can interact with the system in multiple scenarios such as projection correction,adding entities,seasonal switching,weather effects,and disaster simulation.The system and the related geographic knowledge points are in harmony with each other.Students learn the contour points such as contour lines,topographical terrain,and sunshine angles in the interactive experience.The design and implementation of the system provides a new form and idea for geography teaching tools based on augmented reality.