| 摘要 |
PROBLEM TO BE SOLVED: To provide a data structure wherein processings such as compression, storage, transfer, or expansion to wire frame data including a feature line generated from a free curve are applied without lowering the effectiveness of space of a storage device, a display speed, and a transfer speed even if a data size increases. SOLUTION: The data structure 1 of wire frame (including the feature line) in an n-th dimensional space consists of a coordinates table 10 for showing coordinates in the n-th dimensional space, a vector table 20, a scholar table 30, a curve information table 40 for showing the feature line according to curve type, and a polyline index table 50 for showing a polyline which does not coincide with the feature line. COPYRIGHT: (C)2004,JPO |
