A Collaborative Method Enabling Participatory Design Of 3D Virtual Interior Scenes

At present,virtual reality technology has developed rapidly and has turned into a hot issue in academic field.A growing number of virtual reality applications have come into view.As the base of virtual reality systems,the growing importance of 3d virtual scene has been highlighted.In addition,3d virtual scenes are also widely used in computer animation,computer game design,military training and other fields.The design of 3d virtual scene is divided into two stages:modeling and scene constructing.For current applications,the scenes usually are loaded into applications after designer finished their construction by some 3d animation software in the stage of constructing scene.The end-users of these applications have little or no participation in virtual scene design.In this situation,there is new demand for the 3d virtual scene design.On the one hand,virtual scenes need to be constructed quickly according to the requirements.On the other hand,end-users need to participate in the scene constructing process,and the 3d virtual scene also needs to be adjusted based on the experience and feedback of the end-users in order to meet their requirements.For the above reasons,this thesis focuses on a fast constructing method of 3d indoor virtual scenes.Our method supports designers to quickly construct virtual scene according to requirements.Not only the virtual scenes can be constructed quickly according to the requirements,but also end-users can easily participate in different stages of scene constructing.It can improve the efficiency of scene constructing and user satisfaction.The main contributions of this thesis are summarized in the following parts:1.We develop a system platform which based on touch screens for constructing 3d indoor virtual scene.From the perspective of simple,easy to learn and easy to use,we have designed various interactive operations of 2d view and 3d view,and reduced some complex 3d interactive operations to 2d interactive operations.Users can perform appropriate 2d and 3d interactive manipulations based on the two screens.The 3d virtual scene can be efficiently constructed.2.A new workbench for collaboratively constructing 3d virtual environments is developed.It can support several users to collaboratively construct 3d virtual environments locally or remotely.The workbench consists of two touch screens and a holographic display device.Holographic device displays the 3d scene in holographic mode,and supports user to perform 3d scene operation through the touch film attached to it.The touch monitor enables the user to construct the scene through a simple drag-and-drop operation based on the 2d view of the 3d scene.The face-to-face collaborative design method of the workbench is more conductive to users'communication,increasing design efficiency of 3d scene.3.A new method for collaborative design of 3d virtual scene is proposed.Among them,we designed a large angle fold(range of 0 ° and 270 °)dual touch screen devices based on two portable tablet.The device provides three ways to support collaborative design.System also supports the end user experience and design virtual scene by VR headsets equipment,and designers can observe real-time VR user experience through dual touch screen device.Moreover,they can revise the 3d scene through communication,so the modification result conforms to the requirements of users.After the VR experience,the end-user can re-play the experience process with the designer on the dual touch screen device,and further modify and adjust the virtual scene through face-to-face discussion.User test shows that this method can realize the effective design of 3d scene,and can better meet user demand.The system platform in this paper has been preliminarily applied in virtual museum design,fire safety simulation drill,exhibition hall design and game scene design.