Workshop on Virtual Reality Interactions and Physical Simulations最新文献

The Impact of Passive Head-Mounted Virtual Reality Devices on the Quality of EEG Signals 被动头戴式虚拟现实设备对脑电信号质量的影响

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2018-04-15 DOI: 10.2312/vriphys.20181064

G. Cattan, Anton Andreev, César Mendoza, M. Congedo

引用次数: 14

Elasticity-based Clustering for Haptic Interaction with Heterogeneous Deformable Objects 基于弹性聚类的异质可变形物体触觉交互

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2017-04-23 DOI: 10.2312/vriphys.20171086

Benoit Le Gouis, M. Marchal, A. Lécuyer, B. Arnaldi

{"title":"Elasticity-based Clustering for Haptic Interaction with Heterogeneous Deformable Objects","authors":"Benoit Le Gouis, M. Marchal, A. Lécuyer, B. Arnaldi","doi":"10.2312/vriphys.20171086","DOIUrl":"https://doi.org/10.2312/vriphys.20171086","url":null,"abstract":"Physically-based simulation of heterogeneous objects remains computationally-demanding for many applications, especially when involving haptic interaction with virtual environments. In this paper, we introduce a novel multiresolution approach for haptic interaction with heterogeneous deformable objects. Our method called \"Elasticity-based Clustering\" is based on the clustering and aggregation of elasticity inside an object, in order to create large homogeneous volumes preserving important features of the initial distribution. The design of such large and homogeneous volumes improves the attribution of elasticity to the elements of the coarser geometry. We could successfully implement and test our approach within a complete and real-time haptic interaction pipeline compatible with consumer-grade haptic devices. We evaluated the performance of our approach on a large set of elasticity configurations using a perception-based quality criterion. Our results show that for 90% of studied cases our method can achieve a 6 times speedup in the simulation time with no theoretical perceptual difference.","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122029472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Implicit Mesh Generation using Volumetric Subdivision 隐式网格生成使用体积细分

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2017-04-23 DOI: 10.2312/vriphys.20171079

C. Altenhofen, Felix Schuwirth, A. Stork, D. Fellner

{"title":"Implicit Mesh Generation using Volumetric Subdivision","authors":"C. Altenhofen, Felix Schuwirth, A. Stork, D. Fellner","doi":"10.2312/vriphys.20171079","DOIUrl":"https://doi.org/10.2312/vriphys.20171079","url":null,"abstract":"In this paper, we present a novel approach for a tighter integration of 3D modeling and physically-based simulation. Instead of modeling 3D objects as surface models, we use a volumetric subdivision representation. Volumetric modeling operations allow designing 3D objects in similar ways as with surface-based modeling tools. Encoding the volumetric information already in the design mesh drastically simplifies and speeds up the mesh generation process for simulation. The transition between design, simulation and back to design is consistent and computationally cheap. Since the subdivision and mesh generation can be expressed as a precomputable matrix-vector multiplication, iteration times can be greatly reduced compared to common modeling and simulation setups. Therefore, this approach is especially well suited for early-stage modeling or optimization use cases, where many geometric changes are made in a short time and their physical effect on the model has to be evaluated frequently. To test our approach, we created, simulated and adapted several 3D models. Additionally, we measured and evaluated the timings for generating and applying the matrices for different subdivision levels. For comparison, we also measured the tetrahedral meshing functionality offered by CGAL for similar numbers of elements. For changing topology, our implicit meshing approach proves to be up to 70 times faster than creating the tetrahedral mesh only based on the outer surface. Without changing the topology and by precomputing the matrices, we achieve a speed-up of up to 2800.","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123112296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Vascular Neurosurgery Simulation with Bimanual Haptic Feedback 血管神经外科模拟与双手触觉反馈

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2015-11-04 DOI: 10.2312/vriphys.20151337

Jérémie Dequidt, E. Coevoet, L. Thinès, C. Duriez

引用次数: 7

A New Force Model for Controllable Breaking Waves 可控破碎波的一种新力模型

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2015-11-04 DOI: 10.2312/vriphys.20151334

Mathias Brousset, Emmanuelle Darles, Daniel Méneveaux, Pierre Poulin, B. Crespin

{"title":"A New Force Model for Controllable Breaking Waves","authors":"Mathias Brousset, Emmanuelle Darles, Daniel Méneveaux, Pierre Poulin, B. Crespin","doi":"10.2312/vriphys.20151334","DOIUrl":"https://doi.org/10.2312/vriphys.20151334","url":null,"abstract":"(a) Multiple waves displayed from the side (b) from above (c) Waves interacting with static blocks Figure 1: Breaking waves obtained with our model. An ocean scene with multiple waves is displayed (a) from the side and (b) from above; (c) and breaking waves and backflow waves colliding with blocks. The waves combine naturally, while each of them is modeled with its specific parameters (height, width, speed, orientation, crest slope, breaking time). Abstract This paper presents a new method for controlling swells and breaking waves using fluid solvers. With conventional approaches that generate waves by pushing particles with oscillating planes, the resulting waves cannot be controlled easily, and breaking waves are even more difficult to obtain in practice. Instead, we propose to use a new wave model that physically describes the behavior of wave forces. We show that mapping those forces to particles produces various types of waves that can be controlled by the user with only a few parameters. Our method is based on a 2D representation that describes wave speed, width, and height. It handles many swell and wave configurations, with various breaking situations. Crespin / A New Force Model for Controllable Breaking Waves","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131381803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Unified Topological-Physical Model for Adaptive Refinement 自适应细化的统一拓扑物理模型

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2014-09-24 DOI: 10.2312/vriphys.20141222

Elsa Fléchon, F. Zara, G. Damiand, F. Jaillet

{"title":"A Unified Topological-Physical Model for Adaptive Refinement","authors":"Elsa Fléchon, F. Zara, G. Damiand, F. Jaillet","doi":"10.2312/vriphys.20141222","DOIUrl":"https://doi.org/10.2312/vriphys.20141222","url":null,"abstract":"In Computer Graphics, physically-based simulation of deformable objects is a current challenge, and many effi-cient models have been developed to reach real-time performance. However, these models are often limited when complex interactions involving topological modifications are required. To overcome this, the key issue is to manage concurrently, and at minimal cost, both the topology and physical properties. Thus, this paper presents a unified topological-physical model for soft body simulation. The complete embedding of physical and topological models will facilitate operations like piercing, fracture or cutting, as well as adap-tive refinement. Indeed, the difficulty is to treat topological changes during the simulation, requiring combined geometric and physics considerations. Rigorous topological operations guarantee the validity of the mesh, while direct access to the adjacent and incident relations will ease the update of physical properties of new elements created during these operations. These features are illustrated on an embedded mass-spring system undergoing topological modifications per-formed during simulation. Different levels of subdivision are also presented.","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124677978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Rethinking Shortest Path: An Energy Expenditure Approach 重新思考最短路径:一种能量消耗方法

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2013-11-27 DOI: 10.2312/PE.vriphys.vriphys13.035-039

Christos Mousas, Paul F. Newbury, C. Anagnostopoulos

引用次数: 2

3D Mobility Learning and Regression of Articulated, Tracked Robotic Vehicles by Physics-based Optimization 基于物理优化的铰接履带式机器人车辆三维移动学习与回归

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2012-12-07 DOI: 10.2312/PE/vriphys/vriphys12/147-156

P. Papadakis, F. Pirri

{"title":"3D Mobility Learning and Regression of Articulated, Tracked Robotic Vehicles by Physics-based Optimization","authors":"P. Papadakis, F. Pirri","doi":"10.2312/PE/vriphys/vriphys12/147-156","DOIUrl":"https://doi.org/10.2312/PE/vriphys/vriphys12/147-156","url":null,"abstract":"Motion planning for robots operating on 3D rough terrain requires the synergy of various robotic capabilities, from sensing and perception to simulation, planning and prediction. In this paper, we focus on the higher level of this pipeline where by means of physics-based simulation and geometric processing we extract the information that is semantically required for an articulated, tracked robot to optimally traverse 3D terrain. We propose a model that quantifies 3D traversability by accounting for intrinsic robot characteristics and articulating capabilities together with terrain characteristics. By building upon a set of generic cost criteria for a given robot state and 3D terrain patch, we augment the traversability cost estimation by: (i) unifying pose stabilization with traversability cost estimation, (ii) introducing new parameters into the problem that have been previously overlooked and (iii) adapting geometric computations to account for the complete 3D robot body and terrain surface. We apply the proposed model on a state-of-the-art Search and Rescue robot by performing a plurality of tests under varying conditions and demonstrate its efficiency and applicability in real-time.","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116701371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Bézier Shell Finite Element for Interactive Surgical Simulation 交互式手术模拟的bsamizier Shell有限元

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2012-12-06 DOI: 10.2312/PE/vriphys/vriphys12/107-116

J. Bender, Arjan Kuijper, D. W. Fellner, É. Guérin, Tomas Golembiovsky, C. Duriez

{"title":"Bézier Shell Finite Element for Interactive Surgical Simulation","authors":"J. Bender, Arjan Kuijper, D. W. Fellner, É. Guérin, Tomas Golembiovsky, C. Duriez","doi":"10.2312/PE/vriphys/vriphys12/107-116","DOIUrl":"https://doi.org/10.2312/PE/vriphys/vriphys12/107-116","url":null,"abstract":"There is a strong need, in surgical simulations, for physically based deformable model of thin or hollow structures. The use of shell theory allows to have a well-founded formulation resulting from continuum mechanics of thin objects. However, this formulation asks for second order spatial derivatives so requires the use of complex elements. In this paper, we present a new way of building the interpolation: First, we use the trianular cubic Bezier shell to allow for a good continuity inside and between the elements and second, we build a kinematic mapping to reduce the degrees of freedom of the element from 10 control points with 3 Degrees of Freedom ($=30$ DOFs) to only 3 nodes with 6 DOFs ($=18$ DOFs). This reduction allows for good computation performance. This new shell model description is also used to map a smooth surface (for the collision detection and response) on a coarse mechanical mesh to account for the complex contacts that take place during surgical procedures. We demonstrate the convergence and the computational efficiency of our approach as well as its use in two different simulation cases: the planning of surgery for congenital heart disease correction and a preliminary simulation of childbirth.","PeriodicalId":446363,"journal":{"name":"Workshop on Virtual Reality Interactions and Physical Simulations","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Packed Memory Array to Keep Moving Particles Sorted 一个打包的内存数组来保持移动粒子的排序

Workshop on Virtual Reality Interactions and Physical Simulations Pub Date : 2012-12-06 DOI: 10.2312/PE/vriphys/vriphys12/069-077

Marie Durand, B. Raffin, F. Faure

引用次数: 18