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A differential method for the haptic rendering of deformable objects

Published:01 November 2006Publication History

ABSTRACT

This paper introduces a new method for the computation of contact forces during the haptic interaction between a rigid probe and a soft virtual object. Tradicional methods used to estimate forces inside a haptic loop are based on a penetration distance of the haptic probe inside the virtual objects. This unnatural approach creates some visual incoherences when simulating the contact with rigid objects, but works fine on the force estimation side. For soft objects however, the use of a penetration distance makes less sense and creates many problems both visually and haptically. We propose a method that considers the penetration of the probe inside the virtual object as being an approximation error, and performs an iterative model adjustment estimating a local elasticity for the deformable object. Forces are computed incrementally. The proposed approach is independent from any particular implementation used for simulating the deformable object. The force estimation is based on the actual shape of the object, considering its deformations, allowing multiple users to interact with a same object while feeling the influence of each other. Experimental results are presented.

References

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          cover image ACM Conferences
          VRST '06: Proceedings of the ACM symposium on Virtual reality software and technology
          November 2006
          400 pages
          ISBN:1595933212
          DOI:10.1145/1180495

          Copyright © 2006 ACM

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          Publication History

          • Published: 1 November 2006

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