| Title |
3D Visibility Data Search and Its Implementation in 3D Virtual Space by Ray Picking Method |
| Authors |
Chang, Dong-Kuk ; Park, Joo-Hee |
| DOI |
http://dx.doi.org/10.5659/JAIK_PD.2016.32.12.71 |
| Keywords |
3D Visibility analysis ; Ray picking method |
| Abstract |
Three-dimensional visibility techniques have been developed mainly in targeting the analysis of spatial volumes as well as the surfaces, such as, floors, walls and building facades. It is however difficult to apply these kinds of techniques into more sophisticated 3D visibility analysis because it has not been reported the way how to trace the details of analysed results due to a lack of searching process techniques of those in 3D virtual space. This study is therefore to develop 3D visibility data tracing and graphically representing technique in a 3D virtual space. Our approach employs a reverse process of multi-layer rendering algorithm to perform the picking operation in the 3D visibility analysis process. Two techniques are formulated: a dynamic view frustum of the screen following user instruction under the virtual camera installed in 3D space together with ray-picking algorithm and a reverse process of 3D projection for rendering. This data searching technique in 3D virtual space helps to interpret and simulate of design layout more precisely, as well as to pin point and present the analyzed 3D visibility data accurately. |