| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-dimensional view display device capable of displaying a building ceiling having a complicated polygonal shape by use of a 3D graphics chip. SOLUTION: This three-dimensional view display device has: a map data storage means storing an attribute including height information of a building and a bottom face shape of the building; a building 3D model generation means generating a building 3D model shape showing coordinates in a three-dimensional space of the building by use of the height information and the bottom face shape of the building stored in the map data storage means; a building ceiling triangle division means dividing the bottom face shape of the building into triangles as a polygon of the building ceiling; a 3D drawing means performing drawing of the surface of a building wall face constituting the building 3D model generated by the building 3D model generation means and the ceiling divided into the triangles by the building ceiling triangle division means, and hidden surface removal by use of the three-dimensional graphics chip to draw a three-dimensional shape of the building; and a display means displaying the three-dimensional shape of the building drawn by the 3D drawing means. COPYRIGHT: (C)2008,JPO&INPIT |
