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Deformation Grammars: Hierarchical Constraint Preservation Under Deformation

Ulysse Vimont, Damien Rohmer, Antoine Begault, Marie-Paule Cani
2017 Computer graphics forum (Print)  
Abstract Deformation grammars are a novel procedural framework enabling to sculpt hierarchical 3D models in an object-dependent manner.  ...  We demonstrate the feasibility and the versatility of this approach on a variety of examples, implemented within an interactive sculpting system.  ...  Mouse gestures must be processed at around 10 fps for the deformation to be smooth and sculpture-like.  ... 
doi:10.1111/cgf.13090 fatcat:jycdf276o5bdpatqv6p4kjosl4

Extended free-form deformation: a sculpturing tool for 3D geometric modeling

Sabine Coquillart
1990 Computer graphics  
Several authors have suggested tools that allow a designer to see the design operations as sculpturing tools [12, 19, 7, 2, 1, 5, 17, 8, 15] .  ...  This paper introduces an extension of the FFD technique called EFFD, for Extended Free-Form Deformation. The new method uses non-parallelep~pedical 3D lattices.  ... 
doi:10.1145/97880.97900 fatcat:t4nwe7gp5fgynllnudr2yfvtgq

Extended free-form deformation: a sculpturing tool for 3D geometric modeling

Sabine Coquillart
1990 Proceedings of the 17th annual conference on Computer graphics and interactive techniques - SIGGRAPH '90  
Several authors have suggested tools that allow a designer to see the design operations as sculpturing tools [12, 19, 7, 2, 1, 5, 17, 8, 15] .  ...  This paper introduces an extension of the FFD technique called EFFD, for Extended Free-Form Deformation. The new method uses non-parallelep~pedical 3D lattices.  ... 
doi:10.1145/97879.97900 dblp:conf/siggraph/Coquillart90 fatcat:ihg4iuxfh5g57jkmgvfdzgvdaq

Sweepers: Swept deformation defined by gesture

Alexis Angelidis, Geoff Wyvill, Marie-Paule Cani
2006 Graphical Models  
Sweepers is a framework for defining space deformation operations for interactive shape modeling. The artist describes a basic deformation as a path through which a tool is moved.  ...  When a tool is moved, it causes a deformation of the working shape along the path of the tool. More complicated deformations are achieved by using several tools simultaneously in the same region.  ...  In Scodef (Simple Constrained Deformation) instead of just control points, P. Borrel and A.  ... 
doi:10.1016/j.gmod.2005.08.002 fatcat:irr6wtpmmvdo7mtnt3t7xcnj7e

Fast volumetric deformation on general purpose hardware

C. Rezk-Salama, M. Scheuering, G. Soza, G. Greiner
2001 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware - HWWS '01  
High performance deformation of volumetric objects is a common problem in computer graphics that has not yet been handled sufficiently.  ...  New optimizations are introduced in this paper which are especially tailored to an efficient implementation using general purpose rasterization hardware, including new technologies, such as vertex programs  ...  As an aside, carps are a typical Franconian delicacy, which are exclusively available in the months, which contain an r (September -April).  ... 
doi:10.1145/383507.383517 fatcat:ev3jhojqm5dppgwg6g5plgpnma

Free-Form Deformation with Rational DMS-Spline Volumes

Gang Xu, Guo-Zhao Wang, Xiao-Diao Chen
2008 Journal of Computer Science and Technology  
In this paper, we propose a novel free-form deformation (FFD) technique, RDMS-FFD (Rational DMS-FFD), based on rational DMS-spline volumes.  ...  How to generate a tetrahedral domain that approximates the shape of the object to be deformed is also introduced in this paper.  ...  Kazuya et al. proposed a similar method which adopted a triangular mesh as the deformation control tool [24] .  ... 
doi:10.1007/s11390-008-9182-3 fatcat:vpwyvlgxnvegpjkzjkqlkime7m

Space deformations and their application to shape modeling

Alexis Angelidis, Karan Singh
2006 ACM SIGGRAPH 2006 Courses on - SIGGRAPH '06  
We present an overview of a set of techniques called space deformations, also known as free-form deformations, warps, skinning or deformers.  ...  This independence from the underlying geometric representation of deformed shape makes even the simplest and earliest deformation techniques still applicable and popular in current industrial practice.  ...  C A (38) Simple Constrained Deformations for Geometric Modeling and Interactive Design (scodef) In simple constrained deformations (scodef), P.  ... 
doi:10.1145/1185657.1185672 dblp:conf/siggraph/AngelidisS06 fatcat:hzsereye6zgzjkbs4orlbagedq

Deforming and Animating Discretely Sampled Object Representations [article]

M. Chen, C. Correa, S. Islam, M. W. Jones, P.-Y. Shen, D. Silver, S. J. Walton, P. J. Willis
2005 Eurographics State of the Art Reports  
Hence it poses a significant scientific and technical challenge to develop deformation and animation methods that operate upon DSORs.  ...  In this state of the art report, we survey a wide-range of techniques that have been developed for manipulating, deforming and animating DSORs.  ...  framework of the van project, which is funded by an EPSRC programme with grants GR/S44198 and GR/S46574, which were awarded to Swansea and Bath respectively, and for which Professor Silver (Rutgers) is a  ... 
doi:10.2312/egst.20051047 fatcat:oy3fdij4kba4bgdjpjki5mndm4

Manipulating, Deforming and Animating Sampled Object Representations

M. Chen, C. Correa, S. Islam, M. W. Jones, P.-Y. Shen, D. Silver, S. J. Walton, P. J. Willis
2007 Computer graphics forum (Print)  
Hence it poses a significant scientific and technical challenge to develop deformation and animation methods that operate upon SORs.  ...  In this state of the art report, we survey a wide range of techniques that have been developed for manipulating, deforming and animating SORs.  ...  framework of the van project, which is funded by an EPSRC programme with grants GR/S44198 and GR/S44204, which were awarded to Swansea and Bath respectively, and for which Professor Silver (Rutgers) is a  ... 
doi:10.1111/j.1467-8659.2007.01102.x fatcat:toqclsk3bnb5zfq55qwhuqn7vi

Fast volume-preserving free-form deformation using multi-level optimization

G. Hirota, R. Maheshwari, M.C. Lin
2000 Computer-Aided Design  
Given the boundary representation of a solid and user-specified deformation, the algorithm computes the new node positions of the de,formation lattice, while minimizing the elastic energy subject to the  ...  We present an efficient algorithm for preserving the total volume of a solids wdergoing free-form deformation using discrete level-of-detail representations.  ...  Free-form deformation (FFD) was first formally proposed in [SP86] both as a representation for free-form solids and as a method for sculpturing solid models.  ... 
doi:10.1016/s0010-4485(00)00038-5 fatcat:iz2qm5uq25d7tkgttkeuiuy7oi

Fast volume-preserving free form deformation using multi-level optimization

Gentaro Hirota, Renee Maheshwari, Ming C. Lin
1999 Proceedings of the fifth ACM symposium on Solid modeling and applications - SMA '99  
Given the boundary representation of a solid and user-specified deformation, the algorithm computes the new node positions of the deformation lattice, while minimizing the elastic energy subject to the  ...  We present an efficient algorithm for preserving the total volume of a solids undergoing free-form deformation using discrete level-of-detail representations.  ...  Free-form deformation (FFD) was first formally proposed in [SP86] both as a representation for free-form solids and as a method for sculpturing solid models.  ... 
doi:10.1145/304012.304036 dblp:conf/sma/HirotaML99 fatcat:p6ppbfysvbantmsgi72ynrw6xy

Extracting hand grasp and motion for intent expression in mid-air shape deformation: A concrete and iterative exploration through a virtual pottery application

Vinayak, Karthik Ramani
2016 Computers & graphics  
Users particularly enjoyed using day-to-day physical objects as tools for shaping pots.  ...  Our work evidently demonstrates that it is possible to enable users to express their intent for shape deformation without the need for a fixed set of gestures for clutching and deforming a shape.  ...  One user fashioned a new tool by combining 784 different Shapescapes TM parts.  ... 
doi:10.1016/j.cag.2015.10.012 fatcat:f3oxsl7h5be6pofugdrigc2s6m

A subdivision-based deformable model for surface reconstruction of unknown topology

Ye Duan, Hong Qin
2004 Graphical Models  
The deformable behavior of the model is governed by a locally defined objective function associated with each vertex of the model.  ...  Our experiments have demonstrated that the new modeling algorithm is valuable for iso-surface extraction in visualization, shape recovery and segmentation in medical imaging, and surface reconstruction  ...  This paper further extends the previous works with several new capabilities.  ... 
doi:10.1016/j.gmod.2004.05.004 fatcat:qg4cc4wiore27dfe3powwwpckq

DigitalSculpture: a subdivision-based approach to interactive implicit surface modeling

Kevin T. McDonnell, Yu-Sung Chang, Hong Qin
2005 Graphical Models  
In the subdivision limit, a virtual sculpture is obtained by extracting the zero-level from the volumetric, scalar field defined over the irregular grid.  ...  In our new shape design approach, the boundary of an object is given by a level surface of a 3D function defined over an arbitrary, volumetric region (spanned by hexahedral meshes) of complex topology.  ...  Acknowledgments This research was supported in part by the NSF CAREER Award CCR-9896123, the NSF Grant DMI-9896170, the NSF ITR Grant IIS-0082035, the NSF Grant IIS-0097646, a Honda Initiation Award, an  ... 
doi:10.1016/j.gmod.2004.11.001 fatcat:pyplwudx3jb2dnx64bykkjq6ju

A sense of touch in online sculpting

Ian Creighton, Chris Ho-Stuart
2004 Proceedings of the 2nd international conference on Computer graphics and interactive techniques in Austalasia and Southe East Asia - GRAPHITE '04  
This will be extended to a small suite of modeling tools, in progress at this time.  ...  It makes use of a simple force-feedback joystick to control a spherical tool which makes changes to the surface of a 3D model represented onscreen.  ...  This application is also constrained by the nature of the hardware used.  ... 
doi:10.1145/988834.988855 dblp:conf/graphite/CreightonH04 fatcat:bmby2wfpt5eflftbtk7yiafw2m
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