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Constraint-based curve manipulation

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2 Author(s)
Fowler, B. ; Pacific Data Images, Sunnyvale, CA, USA ; Bartels, R.

Alternative techniques for control-vertex manipulation of parametric curves are described. Their generality and flexibility make possible a wide range of curve-editing interfaces based on direct manipulation. A method for applying systems of constraints at one or more arbitrary points on a single or composite curve and an efficient technique for the interactive application of these systems are outlined. Analytic solutions and examples for useful systems of constraints are presented.<>

Published in:

Computer Graphics and Applications, IEEE  (Volume:13 ,  Issue: 5 )