Title:
CURVED SURFACE FORMING SYSTEM
Document Type and Number:
Japanese Patent JPS60173680
Kind Code:
A
Abstract:
PURPOSE:To control the shape of curved surface simply by controlling freely movement of characteristic curve along controlling curves. CONSTITUTION:A characteristic curve 1 is deformed and moved along controlling curves 2, 3 to make both ends of the characteristic curve 1 conform simultaneously to PiQi. Combination of parallel shifting, rotational shifting and similarity conversion (enlarging and reducing) is enough as the method of deformation and shifting. In the section Pi, Pi+1 and section Qi, Qi+1, a point of correspondence is determined to make the ratio of interior division of arc length of controlling curves 2, 3 equal, and deformation and shifting of the characteristic curve 1 are made in similar way as above-mentioned. Thus, the characteristic curve 1 can be deformed and shifted to pass the designated point of correspondence (Pi, Qi)i=1, n simultaneously, and a smooth curved surface can be formed.
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Inventors:
UENISHI HIROBUMI
Application Number:
JP2853584A
Publication Date:
September 07, 1985
Filing Date:
February 20, 1984
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05B19/4097; G06F17/50; G06T17/20; G09G5/36; (IPC1-7): G06F15/72
Attorney, Agent or Firm:
Akio Takahashi