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746
Free-form deformation of solid geometric models
- IN PROC. SIGGRAPH 86
, 1986
"... A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitives of any type or degree: planes, quadrics, parametric surface patches, or implicitly defined surfaces, f ..."
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Cited by 701 (1 self)
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A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitives of any type or degree: planes, quadrics, parametric surface patches, or implicitly defined surfaces
Aerodynamic Shape Optimization Based on Free-form Deformation
, 2004
"... This paper presents a free-form deformation technique suitable for aerodynamic shape optimization. Because the proposed technique is independent of grid topology, we can treat structured and unstructured computational fluid dynamics grids in the same manner. The proposed technique is an alternative ..."
Abstract
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Cited by 15 (0 self)
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This paper presents a free-form deformation technique suitable for aerodynamic shape optimization. Because the proposed technique is independent of grid topology, we can treat structured and unstructured computational fluid dynamics grids in the same manner. The proposed technique is an alternative
Optimal Contour Orientations for Machining of Free-Form Surfaces
, 2001
"... In contour machining of free--form surfaces with a ball-end cutter, the tool contacts the surface along loci that correspond to sections by a set of parallel planes, with equidistant spacing \Delta and common normal N. For a given tool radius, the greatest scallop height between successive tool ..."
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Cited by 1 (1 self)
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In contour machining of free--form surfaces with a ball-end cutter, the tool contacts the surface along loci that correspond to sections by a set of parallel planes, with equidistant spacing \Delta and common normal N. For a given tool radius, the greatest scallop height between successive tool
A Variational Bayesian Framework for Graphical Models
- In Advances in Neural Information Processing Systems 12
, 2000
"... This paper presents a novel practical framework for Bayesian model averaging and model selection in probabilistic graphical models. Our approach approximates full posterior distributions over model parameters and structures, as well as latent variables, in an analytical manner. These posteriors ..."
Abstract
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Cited by 267 (7 self)
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fall out of a free-form optimization procedure, which naturally incorporates conjugate priors. Unlike in large sample approximations, the posteriors are generally nonGaussian and no Hessian needs to be computed. Predictive quantities are obtained analytically. The resulting algorithm generalizes
Continuous field based free-form surface modeling and morphing
"... In this paper, we present a novel continuous field based free-form surface modeling and morphing algorithm. Polyhedra are used in our algorithm as the skeletons of the free-form surfaces. Unlike the conventional methods, we first construct a continuous field from each skeleton using variational int ..."
Abstract
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Cited by 1 (0 self)
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arbitrary polyhedra in an intuitive and controllable manner by introducing certain constraints. Several examples are shown to demonstrate our method can be used to naturally and intuitively model complex free-form surfaces and morph in a controllable way.
Mathematical Free-Form Solid Modelling Based On Extended Simplicial Chains
- Journal of WSCG
, 1999
"... A mathematical model for geometric modelling is presented in this work. This model is based on the concept of extended simplicial chain. Solids are defined by means of simple algebraic operations (additions and subtractions) performed on what we call extended cells. In like manner, by using the o ..."
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Cited by 1 (0 self)
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the operations defined for extended simplicial chains, we obtain the traditional Boolean operations in geometric modelling. Thus, we define a new model which allows us to represent and operate with freeform solids, particularised for the case of solids whose boundaries are free-form surfaces expressed as a
Deformation Techniques Exploring the Blending of Free-Form Deformation and Linear Blend Skinning
"... Animation films involving 3D characters are becoming increasingly popular with both audiences and the studios producing them. Producing believable and expressive animated deformations of these characters is still a time consuming process. We propose a method that combines free-form deformations (FFD ..."
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Animation films involving 3D characters are becoming increasingly popular with both audiences and the studios producing them. Producing believable and expressive animated deformations of these characters is still a time consuming process. We propose a method that combines free-form deformations
International Workshop on Semantics and Orchestration of eGovernment Processes September 2005 Unspecified Ontologies for eGovernment Web Services Composition and Orchestration
"... Ontologies and Web services are the emerging technologies for service interoperability in eGovernment applications. This work proposes to adapt the notion of “UNSpecified Ontology ” (UNSO) to the realm of eGovernment Web services. UNSO allows different users to specify their own personal ontologies, ..."
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, thus eliminating the need for an all-inclusive shared ontology and enhance the users ' privacy. In the context of eGoverment Web services, it allows users to describe their need in a relatively free form manner and supports smart semantic matching capabilities which simplify use by inexperienced
Hot Topic: Ontological Framework for a Free-Form Query Based Grid Search Engine
"... If the model of free-form queries, which has proved successful for HTML based search on the Web, is made available for Grid services, it will serve as a powerful tool for scientists to retrieve information on resources, monitoring, replica location sets, and meta-data on scientific data sets, etc., ..."
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., in a seamless manner. To enable this vision, there is a critical need to design and develop tools that abstract away the fundamental complexity of XML based Grid specifications and toolkits, and provide an elegant, intuitive, simple, and powerful free-form query based invocation system to end users
C code for modeling smooth free-form surfaces of arbitrary patch-layout with linearly-trimmed bicubic B-splines (NURBS)
, 1997
"... The routine Pcp2Nurb is a key building block in overcoming topological constraints in the mathematical modeling of smooth surfaces. On input of a nine-point subnet of a planar-cut polyhedron, this routine outputs bicubic NURBS patches. The bicubic patches join smoothly to form a surface following th ..."
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Cited by 1 (1 self)
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. The generalization allows the modeling of free-form surfaces of arbitrary topology and patch-layout. A planar-cut polyhedron can be obtained by cutting an unrestricted control polyhedron that may contain nonplanar, n-sided panels and m-valent vertices. The generic output of Pcp2Nurb is a four-sided piece of a
Results 1 - 10
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746
