3 dimensional transformation method for 2 dimensional overpass data on 3 dimensional graphics environment and apparatus therefor, and 3 dimensional visualization method for 2 dimensional overpass data on 3 dimensional graphics environment and apparatus using the same

摘要

2-D in a three-dimensional graphics environment, the three-dimensional flyover data conversion method and apparatus, and using the same 3 3D visualization method and apparatus of the two-dimensional flyover data in a dimensional graphics environment are provided. Three-dimensional visualization apparatus for two-dimensional flyover data in a three-dimensional graphics environment, in accordance with the present invention, includes a region overlapping separating portion, triangulation processing, additional height coordinate unit, processing and visualization. By applying the division line to selectively separate the overlapped regions of the polygon, and, after cutting (ear cutting) and by applying a triangulation algorithm processes the polygon, by performing a variety of visualization for each portion of the flyover data is created, two-dimensional flyover may convert the data into a three-dimensional flyover data effectively, can express a variety of appearance of the flyover.