Browsing Portuguese Meeting on Computer Graphics 2002 by Title

Now showing items 1-20 of 23

    • 30 Texture-based Hybrid Visualízations 

      Soada, lmma; Navazo, Isabel (The Eurographics Association, 2022)
      ln this paper the visualization of hybrid scenes that contain volume data anda fitted extracted surface is addressed. The proposed algorithm is based on a integrated octree-based representation: the "Hybrid Octree ". The ...

    • Algorithms for Point-Polygon Collision Oetection in 20 

      Delgado, Juan J. Jiménez; Sánchez, Rafael J. Segura; Higueruela, Francisco R. Feito (The Eurographics Association, 2022)
      ln this article, several algorithms for the collision detection between a point and a polygon on a plane are presented. Coverings by triangles and barycentric coordinates are used. Temporal and geometric coherence are ...

    • Case study: full-size virtual models of trains 

      Serón, Francisco José; Gutiérrez, Diego; Magallón, Juan Antonio; Sobreviela, Emilio José; Gutiérrez, José Antonio (The Eurographics Association, 2022)
      Simulation of models, in all different areas, is an expanding, attractive fine ofwork. More and more applications are taking advantage of the improving technology and knowledge in this field, achieving results that would ...

    • A Constraint Manager to Support Virtual Maintainability 

      Marcelino, Luis; Murray, Norman; Fernando, Terrence (The Eurographics Association, 2022)
      Virtual prototyping tools have already captivated the industry's interest as a viable design tool. One of the key challenges for the research community is to extend the capabilities of Virtual Reality technology beyond its ...

    • A Density Estimation Technique for Radiosity 

      Lastra, Miguel; Urefía, Carlos; Revelles, Jorge; Montes, Rosana (The Eurographics Association, 2022)
      Radiosity computation on scenes including objects with a complex geometry, or with a large number of faces and meshes with very different sizes, is very complex. We presenta new method (based on the Photon Maps method [7]) ...

    • Direct Modelíng: from Sketches to 3D Models 

      Naya, Fernando; Jorge, Joaquim A.; Conesa, Julián; Contera, Manuel; Gomis, José Maria (The Eurographics Association, 2022)
      ln spite of recent advances in Computer Aided Design, Graphical User Interfaces (GUJ) are, by and large, still at the stage of the so-called WIMP (Window, Icon, Menu, Pointing device) approach. ln recent years, our research ...

    • Free-Form Solid Modellíng Based on Extended Simplícial Chains Using Triangular Bézier Patches 

      García, Ángel Luis; Miras, Juan Ruiz de; Feito, Francisco R. (The Eurographics Association, 2022)
      We present a mathematical model for geometric modelling based on the concept of extended simplicial chain (ESC) defined in previous works. With this model, a solid is defined by means of an algebraic sum of nondisjoint ...

    • Hoops Fusion: Synthesis of View-dependent Convex Occluders from a Set of Objects 

      Ríos, Àlex; Navazo, Isabel (The Eurographics Association, 2022)
      Visibility determination is a requirement to navigate through complex scenes. Occluder fusion algorithms generate convex occluders that are contained in the umbra cast by a group of objects given an area light. Hoops are ...

    • INTERCOMUNICANDO - Computer Assisted Communication for Severely Handicapped Persons 

      Lopes, João Brisson; Amaro, Ricardo; Pereira, António (The Eurographics Association, 2022)
      This paper presents project INTERCOMUNICANDO whose aim is to provide computer assisted pictogram based communication as a rehabilitation toolfor severely handicapped persons. The project developed a suite of integrated ...

    • Marching Edges: A Method for lsosurface Extraction 

      Velasco, Francisco; Torres, Juan Carlos; Cano, Pedro (The Eurographics Association, 2022)
      Volumetric data can be represented as a rectilinear structured grid and can be displayed by the rendering of an isosurface that is built from the grid and defining a threshold value. The know marching cubes method builds ...

    • MIXDesign, Tangible Mixed Reality for Architectural Design 

      Salles Dias, J. Miguel; Santos, Pedro; Bastos, Rafael; Monteiro, Luis; Silvestre, Rui; Diniz, Nancy (The Eurographics Association, 2022)
      MIXDesign, provides a tangible Mixed-Reality system oriented towards tasks in Architectural Design, in severa! usage scenarios, such as Conceptual Design, Client Brief or even Architectural Design education. With MIXDesign, ...

    • Oetermining orientation of Laser scanned surfaces 

      Oliveira, João Fradinho; Steed, Anthony (The Eurographics Association, 2022)
      Real 3D data acquired from scanning technology provide interesting 3D models for research and industrial applications. However before these models can be used, a surface needs to be jitted to a point cloud of an unknown ...

    • Optimal Software-based Projector Alignment 

      Baier, Pablo A. S.; Carvalho, Paulo C. P. (The Eurographics Association, 2022)
      We present a software-based method for alignment of projectors, both for side-by-side (mosaic) and stereo projections. The projectors are assumed to be positioned in such a way that their axes are not perpendicular to the ...

    • Powering Multiprojection lmmersive Environments with Clusters of Commodity Computers 

      Soares, Luciano Pereira; Cabral, Márcio Calixto; Bressan, Paulo Alexandre; Lopes, Roseli de Deus; Zuffo, Marcelo Knörich (The Eurographics Association, 2022)
      Multiprojection lmmersive Environments are used in many fields such as science, engineering and art. Virtual Reality (VR) oriented systems have been powered traditionally by high-end graphics workstations or supercomputers ...

    • Proceedings Info 

      Xavier Pueyo; Manuel Próspero dos Santos; Luiz Velho (The Eurographics Association, 2022)

    • Simulating E-Garments Oressed on Personalísed Avatars 

      Dias, José Miguel Salles; González, David Muifíos; Gamito, Manuel Noronha (The Eurographics Association, 2022)
      We present a general computational architecture that solves the problem of the production of physical-based virtual textiles and garments (so called electronic garments or e-garments), applicable in lnternet-based ...

    • Sketching User Interfaces with Visual Patterns 

      Caetano, Anabela; Goulart, Neri; Fonseca, Manuel; Jorge, Joaquim (The Eurographics Association, 2022)
      This paper presents an approach to layout static components of user interfaces as hand-drawn compositions of simple geometric shapes, using sketch recognition and visual languages. The system uses a visual grammar built ...

    • Surface Collision Detection for Maintenance Support in Virtual Environments 

      Marcelino, Luis; Figueiredo, Mauro; Fernando, Terrence (The Eurographics Association, 2022)
      Detecting collision between surfaces is an important feature for supporting interactive assembly operations based on the geometric constraint-based simulation. CAD models define the geometry of components using surfaces ...

    • Towards Content-Based Retrieval of Technical Orawings through High-Oimensional lndexing 

      Fonseca, Manuel J.; Jorge, Joaquim A. (The Eurographics Association, 2022)
      This paper presents a new approach to classify, index and retrieve technical drawings by content. Our work uses spatial relationships, visual elements and high-dimensional indexing mechanisms to retrieve complex drawings ...

    • Towards Fully Reconfígurable Multimedia Platforms 

      Poz, Marco A. S. Dai; Leitão, Ricardo B. Vidigal; Faria, Regis Rossi Alves; Lopes, Roseli de Deus; Zuffo, Marcelo Knörich (The Eurographics Association, 2022)
      This paper describes a novel approach to implement multimedia access platforms: reconfigurable oriented codesign. Nowadays we observe a rapid and mutant evolution of multimedia standards and its de facto adoption into many ...