The Research And Realization Of Virtual Three-dimensional Landscape Planning Model And Scene

As an important application area of virtual simulation technology,the virtual 3D planning enjoys great application values and development space.The establishment of the model as well as the scenes of the virtual 3D sight can be a real reflection of the scientificity and rationality of planning,which is of positive significance to the modification of the planning by planners and the communication of the planners.This paper chooses SketchUp and 3dsMax as the modeling and the texture mapping softwares,takes VR-Platform as the development platform,designs and realizes the system of the virtual 3D planning for the Wetland Park of the Heihe and Weihe river.In the process of creating it,this paper focuses on such four aspects as 3D landscape,the model of 3D sights,model optimization and the roaming system of VR-Platform:(1)This paper studies the modeling methods for ArcGIS and SketchUp and the mapping method of 3dsMax,adopts ArcGIS to build the 3D landscape of the virtual reality,takes SketchUp to build the 3D landscape of the virtual future,maps the model of the 3D landscape using bitmap and UVW mapping coordinates in 3dsMax.(2)This paper studies the modeling software for 3D landscape,adopts SketchUp to model 3D landscapes,takes the methods of sketches and polygons to build models for featured landscapes and makes models for roads,rivers and buildings using such tools as leveling curved surfaces and pushing and pulling,integrates the 3D landscape and the 3D terrain.(3)Through studying the optimization methods for 3D models,this paper optimizes the models in such three aspects as decreasing the numbers of models,downsizing the number of the planes of the models and optimizes the mapping.In addition,this paper improves the sense of reality through texture mapping and baking with the help of 3dsMax.(4)This paper builds the virtual planning scenarios of the 3D sights using the VR-Platform,realizes the roaming function by creating the camera and adding the collision detection,realizes the information query through accessing the database and makes observers to have the feeling of immersion in the process of roaming through adding music,special effects and so on.The 3D landscape model as well as the virtual scenes built by this paper makes people have the sense of reality.In addition,the speed of the demonstration of the scenes is quite quick.All of those helps the planners and decision makers observe the designs and plans directly,helps them know the rationality of the plans more clearly and improve the rationality and scientificity of the plans.