| 摘要 |
PCT No. PCT/JP93/00449 Sec. 371 Date Dec. 2, 1993 Sec. 102(e) Date Dec. 2, 1993 PCT Filed Apr. 7, 1993 PCT Pub. No. WO93/21569 PCT Pub. Date Oct. 28, 1993.A cross sectional configuration creating apparatus to create a free curve by which a cross sectional configuration can be easily defined. An operator creates a cross sectional configuration (DC) on a predetermined plane coordinate system by using a cross sectional configuration creation device. When the creation of a free curve is commanded, a coordinate transformation device positions the created cross sectional configuration (DC) on a plane designated in a spatial coordinate system. Then, a free curve creation device creates the free curve from the cross sectional configuration (DC) positioned on the plane designated in the spatial coordinate system and a basic curve (BC). Further, if necessary, an inverse coordinate transformation device returns the cross sectional configuration (DC) positioned on the plane designated in the spatial coordinate system to the plane coordinate system in response to a command from the operator. The operator can correct the cross sectional configuration (DC) by using the cross sectional configuration creation device.
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