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Drawing with Constraints

Michael Gleicher, Andrew Witkin
Visual Computer, Volume 11, Number 1, page 39--51 — 1994
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    The success of constraint-based approaches to drawing has been limited by difficulty in creating constraints, solving them, and presenting them to users. In this paper, we discuss techniques used in the Briar drawing program to address all of these issues. Briar’s approach separates the problemof initially establishing constraints from that ofmaintaining them during subsequent editing. We describe how non-constraint-based drawing tools can be augmented to specify constraints in addition to positions. These constraints are then maintained as the user drags the model, allowing the user to explore configurations consistent with the constraints. Visual methods are provided for displaying and editing the constraints.

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      author       = "Gleicher, Michael and Witkin, Andrew",
      title        = "Drawing with Constraints",
      journal      = "Visual Computer",
      number       = "1",
      volume       = "11",
      pages        = "39--51",
      year         = "1994",
      url          = "http://graphics.cs.wisc.edu/Papers/1994/GW94"

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