Machine interpretation of line drawings
Machine interpretation of line drawings
ACM Transactions on Graphics (TOG)
The NURBS book
SKETCH: an interface for sketching 3D scenes
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
An interface for sketching 3D curves
I3D '99 Proceedings of the 1999 symposium on Interactive 3D graphics
Teddy: a sketching interface for 3D freeform design
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
Linear constraints for the interpretation of line drawings of curved objects
Artificial Intelligence
CAD/Cam Theory and Practice
Computer Graphics for Engineers
Computer Graphics for Engineers
Sketch- and constraint-based design of B-spline surfaces
Proceedings of the seventh ACM symposium on Solid modeling and applications
Surface construction by fitting unorganized curves
Graphical Models
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This paper presents an intelligent algorithm on freeform surface interpretation based on four boundary curves, which are initially input with a 2D online sketch interface. The 2D strokes are filtered first and then the two pairs of curves are tidied up for compatibility and parameterisation. Detection of the principal dimensions of boundary curves and their configuration leads to 3D conversion of the 2D strokes. From the 3D curves, a bicubically blended Coons patch (base surface) is constructed. After that, design features such as cuts and offsets can be drawn directly on the 3D surface with gesture sketches. Finally, conceptual design surfaces can be output as exchange surfaces into commercial CAD packages for detailed design. This algorithm does not use explicit construction planes or reference surfaces for converting 2D strokes into 3D curves. Examples have shown that the proposed 3D interpretation algorithm is practical and useful.