Abstract
There is an increasing demand in the conceptual design for more intuitive methods for creating and modifying free-form curves and surfaces in CAD modeling systems. The methods should be based not only on the change of the mathematical parameters but also on the user's specified constraints and shapes. This paper presents a new surface representation model for free-form surface deformation representation. The model is a combination of two functions: a displacement function and a function for representing an existing NURBS surface called parent surface. Based on the surface model, the authors develop two deformation methods which are named SingleDef (Singlepoint constraint based deformation method), and MultiDef (Multiple-points constraints based deformation method). The techniques for free-form surface deformation allow conceptual designer to modify a parent surface by directly applying point constraints to the parent surface. The deformation methods are implemented and taken in an experimental CAD system. The results show that the designer can easily and intuitively control the surface shape.
Original language | English |
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Title of host publication | 25th Design Automation Conference |
Publisher | American Society of Mechanical Engineers |
Pages | 631-640 |
Number of pages | 10 |
ISBN (Electronic) | 9780791819715 |
DOIs | |
Publication status | Published - 1999 |
Externally published | Yes |
Event | ASME 1999 Design Engineering Technical Conferences and Computers & Information in Engineering Conference, DETC 1999 - Las Vegas, United States Duration: 12 Sept 1999 → 16 Sept 1999 |
Conference
Conference | ASME 1999 Design Engineering Technical Conferences and Computers & Information in Engineering Conference, DETC 1999 |
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Abbreviated title | DETC 1999 |
Country/Territory | United States |
City | Las Vegas |
Period | 12/09/99 → 16/09/99 |
Keywords
- CAD
- Computer aided geometric design
- Computer Graphics
- Free-form deformation
- Human-Computer Interactions (HCls)
- Modeling