Abstract
In urban planning and renewal or refurbishment of existing buildings and structures in urban areas, virtual reality (VR) simulation using 3 dimentional models in landscape investigation is useful and effective for building consensus among citizens and other stakeholders. However, it takes much effort, time and cost to make 3D models of all existing buildings and structures in the area. In the near future, many buildings will have their own Building Information Modeling (BIM) data, of which amount can be extremely large and which will not be easily used for VR simulation for urban planning. Thus, in this researche we developed a new method for making a simplified 3D model for VR from a huge BIM data using set intersection operation and we implemented the method as an automatic program. We verified the system by using 6 different kinds of buiding models successfully. The system was applied to a virtual landscape investigation in a hypothetical city model and showed a satisfactory performance.
