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• W174081878 abstract "In Virtual Reality (VR), the haptic sense increases the immersion of users in a Virtual Environment (VE) with which they interact in real time. In this Ph.D thesis, we propose contributions to improve two-handed interaction in haptics with VEs. We first address issues with bimanual interaction in VEs using haptic devices with single effectors. We propose an interaction technique called double bubble for exploration of VEs through a combination of position and rate control. We also present a manipulation technique called magnetic pinch which facilitates the grasping of virtual objects with simple rigid proxies. Simultaneous grasping and exploration of the VE is enhanced using common control modes. A user evaluation was conducted to assess the efficiency of these techniques. We then focus on improving the computation of contact surfaces. We propose a god-finger method to render finger padlike surfaces from a single contact point. It relies on a simple scan of the local geometry of the object in contact, and is this less costly than soft body simulation methods. The method is adapted for interaction using simple or more complex rigid virtual proxies, and with rigid or deformable objects, including rough surfaces. A visual rendering method provides feedback on the shape of the contact surface. Finally, we address the resolution of contacts during dexterous manipulation of virtual objects through soft fingers. The computation of contact mechanics is improved by aggregating the multiple contact constraints involved. A method for nonuniform pressure distribution over the contact surface adapts the response when touching sharp edges. We use the Coulomb-Contensou friction model to efficiently simulate torsional friction. The approach is evaluated with a deformable hand model for real time interaction. The contributions of this manuscript open novel perspectives in the context of bimanual haptics and VR, allowing more natural interaction with more complex VEs." @default.
• W174081878 created "2016-06-24" @default.
• W174081878 creator A5015021314 @default.
• W174081878 date "2014-12-01" @default.
• W174081878 modified "2023-09-23" @default.
• W174081878 title "Bimanual haptic interaction with virtual environments" @default.
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• W174081878 hasPublicationYear "2014" @default.
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