The Design And Implementation Of Multi-target Scene Simulation System Based On OsgEarth

With the rapid development of information technology,computer graphics and GIS-related technologies have all developed rapidly.Digital Earth has gradually entered the field of vision.With the continuous development of the Internet industry,ordinary scene simulation systems have gradually failed to meet the needs of users.For this reason,people urgently need a multi-object scene simulation system that can combine digital earth and three-dimensional scene simulation.This thesis reviews the MFC,OSG and osgEarth frameworks used in system building.MFC is used to write Windows desktop applications.OSG is a 3D scene graph library based on OpenGL.osgEarth is a digital earth engine that extends OSG functionality.The combination of these three frameworks perfectly fits the business requirements of developing a desktop digital-based scene simulation system under the Windows platform.This thesis analyzes the functional and non-functional requirements of the system,and completes the system's architecture design and function division on this basis.The system is divided into three major functional modules:view scenario,simulation control,and scene management.The view scene module focuses on how to control the camera and track the target through the class library provided by the OSG.The simulation control module shows how to control the simulation process to switch between three different states;the scene management module explains How to combine the data reading mechanism of MFC,OSG,and osgEarth to complete loading the scene graph tree.This system has successfully implemented the functional requirements proposed in the analysis phase and has basically completed the goals the system wants to achieve.