US4858150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shape modeling system
Assignee: Hitachi Ltd
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Filing: 1987-03-16
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Granted: 1989-08-15
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Expires: 2007-03-16
Abstract
Abstract A shape modeling method of the interactive operation type for generating a 3-dimensional shape of an object using 2-dimensional wire-frame figures formed by a drawing system, which inputs 2-dimensional coordinate system data of a hierarchical structure that can be drawn into 2-dimensional wire-frame figures.
Inventors
- 👤 Tamio Aizawa
- 👤 Kyoji Takahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:36
CPC Classifications
G; G06; G06T; G06T17/00; G06T17/10; G06T19/00; G06T19/20; G06T2219/00; G06T2219/20; G06T2219/2021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
A shape modeling method for generating a three dimensional shape, said method comprising the steps of: generating data of a two-dimensional figure and a two-dimensional coordinate system through an input means using a computational device; storing said two-dimensional figure and said two-dimensional coordinate system data in a data base; transforming said two-dimensional coordinate system retrieved from said data base into a three-dimensional coordinate system; generating a three-dimensional shape from said two-dimensional figure data and said three-dimensional coordinate system; wherein said two-dimensional figure and said two-dimensional coordinate system data includes two-dimensional figure elements and two-dimensional coordinate system elements; wherein an element of said two-dimension coordinate system which belongs to a two-dimensional figure element is made to be a master element and other elements are made to be slave elements; and wherein said master element includes general data to which said slave elements are hierarchically related.
Claim 2
Dependent Claim
144 words
A shape modeling method for generating a three dimensional shape, said method comprising the steps of: generating data of a two-dimensional figure and a two-dimensional coordinate system through an input means using a computational device; storing said two-dimensional figure and said two-dimensional coordinate system data in a data base; transforming said two-dimensional coordinate system retrieved from said data base into a three-dimensional coordinate system; generating a three-dimensional shape from said two-dimensional figure data and said three-dimensional coordinate system; wherein said two-dimensional figure and said two-dimensional coordinate system data includes two-dimensional figure elements and two-dimensional coordinate system elements; wherein an element of said two-dimension coordinate system which belongs to a two-dimensional figure element is made to be a master element and other elements are made to be slave elements; and wherein said master element includes general data to which said slave elements are hierarchically related.
Claim 3
Dependent Claim
40 words
A shape modeling method according claim 1, wherein data of a two-dimensional figure element includes data of a tree structure level in a three-dimensional coordinate system; and wherein two two-dimensional elements correspond to an element in said three-dimensional coordinate system.
Claim 4
Dependent Claim
43 words
A shape modeling system method according to claim 1, wherein said data of two-dimensional coordinate system elements corresponds to data of three-dimensional coordinate system elements forming a tree structure; and wherein two two-dimensional coordinate system elements correspond to a three-dimensional coordinate system element.
Claim 5
Dependent Claim
38 words
A shape modeling method according to claim 1, wherein said method further comprises the steps of: initially generating data of a two-dimensional wire-frame; and subsequently generating data of a two-dimensional figure by appropriately dividing said two-dimensional wire-frame data.
Claim 6
Dependent Claim
53 words
A shape modeling method according to claim 1, wherein said method generates data of said two-dimensional coordinate system by establishing an origin of a coordinate axis and another point indicating the direction of the axis, and subsequently entering data of a hierarchical level of three-dimensional coordinate system elements expressed in a tree structure.
Claim 7
Dependent Claim
46 words
A shape modeling method according to claim 1, further comprising the steps of: initially generating data of a two-dimensional wire-frame; storing said two-dimensional wire-frame data in said data base; and subsequently generating data of said two-dimensional coordinate system automatically from said data of said two-dimensional wire-frame.
Claim 8
Dependent Claim
63 words
A shape modeling method according to claim 1, wherein said method further comprises the steps of: initially generating a sweep figure using data of said two-dimensional figure and said two-dimensional coordinate system retrieved from the data base; and subsequently, generating data of an object in said data base by sequentially transforming said generated sweep figure into the space of a main coordinate system.
Claim 9
Dependent Claim
68 words
A shape modeling method according to claim 7, wherein said method further comprises the steps of: initially generating a cross-sectional figure in the space of a local coordinate system using said data of said two-dimensional figure and said two-dimensional coordinate system retrieved from said data base; and subsequently generating data of an object by sequentially transforming said generated cross-sectional figure into the space of said main coordinate system.
Claim 10
Dependent Claim
67 words
A shape modeling method according to claim 1, wherein said method further comprises the steps of: initially generating a development figure in the space of a local coordinate system using said data of two-dimensional figure and said two-dimensional coordinate system retrieved from said data base; and subsequently generating data of an object by sequentially transforming said generated development figure into the space of a main coordinate system.
References Cited (Backward Citations)
US4498139A
Cited
US4685070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |