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Parameter-driven freeform deformations [article]

Y. Song, J.S.M. Vergeest, D.P. Saakes
2003 Eurographics State of the Art Reports  
With shape similarity analysis, a user-defined region of interest in the freeform shape is matched, or fitted, to a deformable shape template.  ...  In this paper, an approach of deforming freeform shapes using intrinsic parameters is proposed, where those parameters were not part of the model.  ...  Acknowledgement The presented research is a part of the Dynash project conducted in Faculty of Industrial Design Engineering, Delft University of Technology.  ... 
doi:10.2312/egs.20031066 fatcat:zzt65wqwxbc7za5jd6uicmdlv4

Automatic Design and Manufacture of Soft Robots

Jonathan Hiller, Hod Lipson
2012 IEEE Transactions on robotics  
We present the automated design and manufacture of static and locomotion objects in which functionality is obtained purely by the unconstrained 3-D distribution of materials.  ...  toward understanding the evolution of complexity in nature and in engineering.  ...  Since the complexity of how locomotion is achieved is embedded in the shape, a very simple control scheme can be used.  ... 
doi:10.1109/tro.2011.2172702 fatcat:5kaiwajhnjhz7mwiu5kulxpzte

An interactive product customization framework for freeform shapes

Yunbo Zhang, Tsz Ho Kwok
2017 Rapid prototyping journal  
In this paper, we presented a design system to help user design custom 3D printable products on top of some freeform shapes.  ...  Additive Manufacturing (AM) enables the fabrication of three-dimensional (3D) objects with complex shapes without additional tools and refixturing.  ...  The styling curves can be converted to 3D printable models, and then fabricated by AM. that the shape of a custom-fit product is determined by an existing person or object and represented by complex freeform  ... 
doi:10.1108/rpj-08-2016-0129 fatcat:msjrjptrnnepdajoyq4x4pbd3m

Design automation for customized apparel products

Charlie C.L. Wang, Yu Wang, Matthew M.F. Yuen
2005 Computer-Aided Design  
Therefore, the parametric feature-based modeling enables the automatic generation of fitted garments on differing body shapes.  ...  Freeform surface is adopted to represent the complex geometry models of apparel products.  ...  Thus, the feature-based modeling enables the automatic construction and fitting of garment products on differing human body shapes.  ... 
doi:10.1016/j.cad.2004.08.007 fatcat:i3oczlit5beerhbkpz56ki3w5q

Automatic Line Handles for Freeform Deformation [article]

Leïla Schemali, Jean-Marc Thiery, Tamy Boubekeur
2012 Eurographics State of the Art Reports  
Interactive freeform surface deformation methods allow to explore the space of possible shapes using simple control structures.  ...  Our basic idea is to build control structures from those lines in order to provide users with an automatic set of deformation handles to grab and manipulate, avoiding the tedious task of region selection  ...  Introduction Interactive freeform deformation (FFD) tools allow to edit easily the shape of a surface mesh through a high level control structure.  ... 
doi:10.2312/conf/eg2012/short/081-084 fatcat:o7ezi5kf4remnem2qdjijxvf6m

New Design and Fabrication Methods for Freeform Stone Vaults Based on Ruled Surfaces [chapter]

Matthias Rippmann, Philippe Block
2011 Computational Design Modelling  
This will affect the shape and dimension of the voussoir, which is automatically aligned and positioned within the virtual building chamber of the machine ( fig. 3.1 b) .  ...  Due to the three-dimensional shape of the voussoirs and the geometrically complex fabrication constraints, the challenge is to coordinate the design of the individual voussoirs in combination with the  ... 
doi:10.1007/978-3-642-23435-4_21 fatcat:mhfhvlniyzg4dckvurivffcf7a

Direct 3D Pattern Matching in the Domain of Freeform Shapes

Joris S. M. Vergeest, Sander Spanjaard, Yu Song
2002 International Conference in Central Europe on Computer Graphics and Visualization  
We have studied the problem of extracting shape parameters from freeform features in full 3D.  ...  The type and total number of parameters (6+d), and hence the family of template shapes is determined by the type of feature.  ...  During the fit the number of points m is increased from 1% to 100% of the available points in T(p). Strategy D is a user controlled fit process.  ... 
dblp:conf/wscg/VergeestSS02 fatcat:bstzuojqdvfnzd6xprvbtfuti4

3D level-set topology optimization: a machining feature-based approach

Jikai Liu, Y. -S. Ma
2015 Structural And Multidisciplinary Optimization  
inserted, the feature-based shape optimization algorithm is implemented to determine the optimum part shape and topology.  ...  This method relies on a feature fitting algorithm incorporated into the boundary evolvement process in order to regulate the noisy velocity fields and thus introduce new explicit feature primitives; once  ...  All the research works were carried out at University of Alberta.  ... 
doi:10.1007/s00158-015-1263-7 fatcat:buvhc4aasjbuhhaoq77qdw5ppu

Nanofinishing of freeform/sculptured surfaces: state-of-the-art

Leeladhar Nagdeve, V.K. Jain, J. Ramkumar
2018 Manufacturing Review  
It is very difficult and challenging to achieve high level of surface finish, especially on the components having freeform (or sculptured) surfaces, complex shapes, and 3-D features.  ...  in case of freeform surfaces.  ...  [50] discussed about the cast orthopedic implants with freeform surface textures from a 3-D printed ceramic shell.  ... 
doi:10.1051/mfreview/2018005 fatcat:yfn747erjfgs5bovqh2xj7uah4

Pen-Based User Interface for Geometric Decomposition for Hexahedral Mesh Generation [chapter]

Jean Hsiang-Chun Lu, Inho Song, William Roshan Quadros, Kenji Shimada
2010 Proceedings of the 19th International Meshing Roundtable  
The pen-based UI contains the following features: (1) drawing freeform strokes, (2) fitting and aligning strokes to CAD geometry automatically, (3) creating cutting surfaces, and (4) performing various  ...  The proposed pen-based UI has been tested on a few models to demonstrate its effectiveness in decomposition, defeaturing and controlling mesh orientation.  ...  Ved Vyas and Mr. Erick Johnson for their valuable advises. We would also like to thank Cubit users, in particular Kristin Dion and Ricardo Garcia, for their valuable feedback.  ... 
doi:10.1007/978-3-642-15414-0_16 dblp:conf/imr/LuSQS10 fatcat:vtnpiu6ccndyhgcodxctwozjha

Page 55 of American Ceramic Society Bulletin Vol. 78, Issue 3 [page]

1999 American Ceramic Society Bulletin  
Critical technical issues include the generation of defect-free nozzles and blades in high yields and the dimen- sional control of complex-shaped sur- faces such as airfoils.  ...  Tool Fabrication by 3-D Printing, 818-718-1221 23D Systems, Valencia, Calif.  ... 

Sweep-based Freeform Deformations

Seung-Hyun Yoon, Myung-Soo Kim
2006 Computer graphics forum (Print)  
Thus we can support intuitively plausible shape deformation of objects of arbitrary topology with multiple control handles.  ...  We propose a sweep-based approach to the freeform deformation of three-dimensional objects.  ...  This work was supported by the Korean Ministry of Information and Communication (MIC) under the Program of IT Research Center on CGVR.  ... 
doi:10.1111/j.1467-8659.2006.00968.x fatcat:nmparpjzjzdznfrixigcckcnoe

Paradigm shifts in surface metrology. Part II. The current shift

X. Jiang, P.J. Scott, D.J. Whitehouse, L. Blunt
2007 Proceedings of the Royal Society A  
The current shift is presented in three aspects: from profile to areal characterization; from stochastic to structured surfaces; and from simple geometries to complex freeform geometries, all spanning  ...  The historical philosophy highlighted the fact that the paradigm shifts must be robust and flexible, meaning that surface metrology must allow for full control of surface manufacture and provide an understanding  ...  to structured surfaces; and simple shapes to complex freeform geometries.  ... 
doi:10.1098/rspa.2007.1873 fatcat:az4blkliejg77kwd7slhoetryy

Interactive modeling of lofted shapes from a single image

Congyue Deng, Jiahui Huang, Yong-Liang Yang
2019 Computational Visual Media  
In this work, we present a novel interactive approach for extracting high-quality freeform shapes from a single image.  ...  Modeling the complete geometry of general shapes from a single image is an ill-posed problem.  ...  Early work [24] focused on finding flexible representations of freeform shapes. New types of patches such as those in Ref.  ... 
doi:10.1007/s41095-019-0153-0 fatcat:l577kzzu7nhlxbl5lacx43pvxy

Traceable Reference Full Metrology Chain for Innovative Aspheric and Freeform Optical Surfaces Accurate at the Nanometer Level

Yassir Arezki, Rong Su, Ville Heikkinen, François Leprete, Pavel Posta, Youichi Bitou, Christian Schober, Charyar Mehdi-Souzani, Bandar Abdulrahman Mohammed Alzahrani, Xiangchao Zhang, Yohan Kondo, Christof Pruss (+5 others)
2021 Sensors  
The verification is dedicated to form error analysis of aspherical and freeform optical surfaces based on minimum zone fitting.  ...  The design of innovative reference aspheric and freeform optical elements was investigated with the aim of calibration and verification of ultra-high accurate measurement systems.  ...  Figure 3 . 3 Description of the traceability chain in asphere and freeform metrology.Sensors 2021, 21, x FOR PEER REVIEW 6 of 18 Figure 3 . 3 Description of the traceability chain in asphere and freeform  ... 
doi:10.3390/s21041103 pmid:33562598 pmcid:PMC7915810 fatcat:tjmu7gk65zdfrfe2mq6e4yueoe
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