Free-form deformation of solid geometric models
SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
Curves and surfaces for computer aided geometric design: a practical guide
Curves and surfaces for computer aided geometric design: a practical guide
Computer graphics: principles and practice (2nd ed.)
Computer graphics: principles and practice (2nd ed.)
Interactive techniques for implicit modeling
I3D '90 Proceedings of the 1990 symposium on Interactive 3D graphics
Hierarchical B-spline refinement
SIGGRAPH '88 Proceedings of the 15th annual conference on Computer graphics and interactive techniques
Global and local deformations of solid primitives
SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
Using graphs of bivariate functions to locally represent and modify surfaces
Computer Aided Geometric Design
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Interactive tools that can be used to edit a curved surface locally by altering its intrinsic geometric measures are described. The interface consists of two parts. The first uses graphic displays that illustrate specific characteristics of the surface. Users can isolate different types of curves on a surface. These curves yield unique information about the surface. The second part of the interface uses some of the specialized icons to interactively manipulate the surface itself. The methods can be used with many previously published techniques, and, because they are based on the intrinsic differential geometry of the surface, can be applied to all types of surfaces (parametric, implicit, algebraic, and so forth).