Sweepers: Swept user-defined tools for modeling by deformation. In: Proceedings of Shape Modeling and Applications, We present Sweepers, a new class of space deformations suitable for interactive virtual sculpture. The artist describes a basic deformation as a path through which a tool is moved. Our tools are simply shapes, subsets of 3D space. So we can use shapes already created as customized tools to make more complex shapes or to simplify the modeling process. When a tool is moved it causes a deformation of the working shape along the path of the tool. This is in accordance with a clay modeling metaphor and easy to understand and predict. More complicated deformations are achieved by using several tools simultaneously in the same region. It is desirable that deformations for modeling are ’foldover-free’ that is part of deformed space cannot overlap so that the deformations are reversible. There are good intuitive reasons to believe that our deformations are foldover-free but we have not yet completed a proof. We have an efficient formulation for a single tool following a simple path (translation, scaling or rotation) and we can demonstrate the effects of multiple tools used simultaneously. For representing shapes, we present a mesh refinement and decimation algorithm that takes advantage of the definition of our deformations. The prototype implementation described has been used to create a variety of models quickly and conveniently.

References in zbMATH (referenced in 8 articles )

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  1. Martinez Esturo, Janick; Rössl, Christian; Theisel, Holger: Continuous deformations by isometry preserving shape integration (2012)
  2. Popa, Tiberiu; Julius, Dan; Sheffer, Alla: Interactive and linear material aware deformations (2007)
  3. von Funck, Wolfram; Theisel, Holger; Seidel, Hans-Peter: Implicit boundary control of vector field based shape deformations (2007)
  4. Angelidis, Alexis; Cani, Marie-Paule; Wyvill, Geoff; King, Scott: Swirling-sweepers: Constant-volume modeling (2006) ioport
  5. Angelidis, Alexis; Cani, Marie-Paule; Wyvill, Geoff; King, Scott: Swirling-sweepers: constant-volume modeling (2006)
  6. Angelidis, Alexis; Wyvill, Geoff; Cani, Marie-Paule: Sweepers: swept deformation defined by gesture (2006)
  7. Angelidis, Alexis; Wyvill, Geoff; Cani, Marie-Paule: Sweepers: Swept deformation defined by gesture (2006) ioport
  8. Sharf, Andrei; Blumenkrants, Marina; Shamir, Ariel; Cohen-Or, Daniel: SnapPaste: an interactive technique for easy mesh composition (2006) ioport