Research On Reconstruction Of The 3D Model Of TIANJIN PORT

Three-dimensional model of the port is an important part of ship handling simulator visual system,which use computer and graphic technology,build three-dimensional model of the harbor scenes,contain the virtualization and digital information of the harbor environment,in order to provide multidimensional information for ship maneuvering,when students take the training,would feel like sailing in the real harbor.Thus make students familiar with the port and ship maneuvering while entering and leaving the port.Ultimately achieve the same effect while training by simulator as on the real ship.Port area generally vast,with complicated terrain,only the terrain modeling will occupy a large number of polygons of the database,Port area is a large simulation scenarios.And there are a great number of complicated models along the bank,only a simply modeling of the port will generate a huge database.It needs more details to create a more realistic scene,which needs more number of polygons,and this will resulting in a huge database,finally reduce the efficiency of the simulation system.In the application of research projects on simulator system,the virtual scene of Tianjin harbor is huge and complicated.The objects in the virtual scene was not in good arrangement,some models are rebuilded,some models included many useless polygons,also because of limited time to modeling and to organize the structure of the database,result in making the 3D model database too huge,which cause it spent too much time and more difficult to load the database into the simulation system.The model are aliasing and slow-moving when system is running and there are something missing such as the polygon disappear etc.the Database is so big that it need an excellent hardware of the computer in the process o f modeling.It will cause great difficulties for database maintenance because of complicated and bad organization.It will bring great difficult jobs when we edit the database as the harbor construction growing gradually.The paper study on the reconstruction of TIANJIN PORT,reconstruct and optimize the structure of the database by Multi Gen Creator,combine with various modeling techniques and modeling plug-ins.Build a database not only for manageable but also easy modeling,rebuild the terrain,and optimize the model.Provide an effective and efficient way to solve the contradiction between the quality and the speed of graphical display.