| 摘要 |
PURPOSE:To execute a three-dimensional wire frame model representation which can grasp easily a shape and is easily visible, by executing a display by erasing other wire line than a broken line in inside wire lines of a cubic container. CONSTITUTION:A cubic container is represented by a three-dimensional wire frame consisting of a vertical line wire and a horizontal line wire, and first of all, with each divided surface surrounded by both wires of the vertical and the horizontal lines, whether it is on the inside face of the cubic container or the outside face is decided. Next as for a segment which becomes a boundary of two adjacent inside faces, it is not displayed only when an angle made by the inside faces exceeds a prescribed value. Therefore, in the wire lines of the inside of the cubic container, other lines than polygonal lins 1, 4 can be erased and displayed, and a three-dimensional wire frame model representation which can grasp easily a shape and is easily visible can be executed. |
