Geodesic Spline Interface for Haptic Curve Rendering

Abstract

Several haptic devices have been developed in recent years in order to reproduce the sensation of physical contact with virtual objects. Many of these devices are point-based, and some haptic interfaces behave like small surfaces that conform to a virtual shape. None of these allow a full-hand contact with the shape, and they are, in general, too small to render big surfaces. The simulation of tasks, such as the exploration of aesthetic surfaces made by industrial designers in order to check the quality of prototypes, require full-hand contact with the shape on a one-to-one scaled representation of the object. These explorations follow trajectories that can be approximated with planar or geodesic curves. In this paper, we describe the design and implementation of a linear haptic device that is able to render these trajectories. The device is part of a multimodal system including stereoscopic visualization that allows visual representation of the entire surface. Industrial designers use the system for checking the quality of shapes while exploiting their manual and visual skills. The system has been tested by industrial designers and the results are reported in this paper.

Towards Shape-Changing Devices: Physical Interface Control with an Active Contour Model

“…Physical shape changes can offer a variety of information to a user [22], and can be achieved by point [23,24] and plane actuation [25,26]. For curved interfaces, Katsumoto et al [27] proposed an interface that can change its shape and flexibility, composed of multiple passive joints and utilizing a shape locking mechanism to hold the current state.…”

“…It is a pseudo-physical model, capable of emulating Symmetry 2018, 10, 57 4 of 13 the physical behavior of the rod. It can also be extended to a variety of scenarios such as geometric information transfer [25] and affective interaction [36][37][38] by assigning additional energy functionals. Based on this idea, a tool is modeled as a serial connection of line segments with torsional springs and dampers, and an energy functional describing deflection behavior is defined in terms of a user's movement and the angular displacement of neighboring joints.…”

A hand gestural interaction system for handling a desktop haptic strip for shape rendering

“…For this reason a more performing version of the haptic strip [25,28,29] has been subsequently designed. The final version is based on a geodesic approach, allowing the representation of curves in 3D space, thus increasing the domain of curvature of curves that can be represented.…”

Design of a Desktop Haptic System driven by CAD and Multi-body Systems Associativity

“…The first version of the haptic strip [1] has been developed with the main objective of just integrating the various mechanical components in order to validate the concept at the basis of the strip, which is related to the cutting plane metaphor. Subsequently, a higher performing version of the haptic strip [2,5] has been designed, with the aim of extending the domain of curves that can be haptically rendered. This second strip is capable of rendering geodesic trajectories in addition to planar ones.…”