Haptic Interaction with Deformable Objects: Modelling VR by Guido Böttcher

By Guido Böttcher

The focal point from so much digital truth (VR) structures lies quite often at the visible immersion of the person. however the emphasis basically at the visible belief is inadequate for a few purposes because the consumer is proscribed in his interactions in the VR. consequently the textbook provides the foundations and theoretical heritage to advance a VR process that's in a position to create a hyperlink among actual simulations and haptic rendering which calls for replace charges of 1\,kHz for the strength suggestions. unique awareness is given to the modeling and computation of touch forces in a two-finger seize of textiles. Addressing additional the notion of small scale floor houses like roughness, novel algorithms are offered that aren't purely capable of ponder the hugely dynamic behaviour of textiles but in addition able to computing the small forces wanted for the tactile rendering on the touch element. base line of the full VR procedure is being made displaying the issues and the ideas present in the paintings

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Additional info for Haptic Interaction with Deformable Objects: Modelling VR Systems for Textiles (Springer Series on Touch and Haptic Systems)

Example text

1 Textile Parameters In addition to the previously illustrated material properties in the section before, textile materials have a more complex nonlinear behaviour. In other words, the working range in which the properties remain constant is very small. However, for our purpose of touching and stretching textiles it is sufficient to consider only nonlinear elasticity and omit other properties like creep or hysteresis. Contrary to materials like iron, concrete and wood is the regular structure of a fabric, it is composited by yarns which are themselves made of fibers.

In general, the initial state of a particle system at time t0 is known. The position of the system at the time step ti is determined by the initial position and its ˙ with t0 ≤ t ≤ ti by velocity r(t) r(ti ) = r(t0 ) + ti r˙ (t)dt with r(t0 ) = r0 . 102). The latter equations govern the motion of the particles and represent the aforementioned differential equation system in integral form. By combining the positions and velocities into a single vector y, the system is reduced to first order: ⎛d dt r0 ⎞ ⎛ r˙ 0 ..

For completeness, it is needed to address these properties by adding equations defining the geometric deformation with respect to the undeformed state. 31) onto the deformed state x of the body. e. no self-intersections), it can be concluded that x is continuous and the mapping has to be bijective as the deformation cannot degenerate. The locations denoted X are often referred to as material coordinates. With such a mapping the degree of deformation the body has undergone can be estimated. The deformation quantities, the internal strains, create corresponding internal stresses opposing the deformation.

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