Browsing SIACG 06 by Title

Now showing items 1-20 of 23

    • Adaptive trimming of cubic triangular Bézier patches 

      García, Ángel Luis; Miras, Juan Ruiz de; Feito, Francisco R. (The Eurographics Association, 2006)
      We present a method to handle cubic trimmed triangular Bézier patches. This scheme makes use of levels of detail and surface subdivision to achieve a fast and flexible hierarchical data structure that is specially useful ...

    • ArTbitrating JaVox: Evolution Applied to Visual and Sound Composition 

      Moroni, Artemis Sanchez; Manzolli, Jonatas; Zuben, Fernando Von (The Eurographics Association, 2006)
      ArTbitrariness is presented here as an initiative of upgrading the esthetical judgment through interactive evolutionary computation techniques and other population based techniques. Computational creativity will be approached, ...

    • Augmented Reality Assistance in Forest Fire Fighting 

      Vicens, Fernando; Linares, Jordi; Sancho, Sergio (The Eurographics Association, 2006)
      Forest fire fighting is unfortunately a very important activity for many fire departments. A forest fire is always a very complex situation to manage, in which lots of ground teams and aircraft have to cooperate in order ...

    • Automatic architectural 3D model generation with sunlight simulation 

      Mas, Albert; Besuievsky, Gonzalo (The Eurographics Association, 2006)
      Nowadays, 2D architectural design is provided with many good tools. But it lacks efficient tools that could help designers in early stages of a project for tasks such as virtual prototyping or 3D model simulation. The 3D ...

    • Boolean Operations in Open-Source Blender Project 

      Freixas, Marc; Grau, Sergi; Silva, David (The Eurographics Association, 2006)
      This paper describes the work of a new implementation of the Boolean operations of Blender. Blender is a modelling and animation 3D software with GNU General Public License (GPL). Boolean operations are a useful tool for ...

    • Coherent Hierarchical Level-of-Detail (HLOD) Refinement Through Hardware Occlusion Queries 

      Charalambos, Jean Pierre (The Eurographics Association, 2006)
      We present a coherent hierarchical level of detail (HLOD) culling algorithm that employs a novel metric to perform the refinement of a HLOD-based system that takes into account visibility information. The information is ...

    • Data-driven Tetrahedral Mesh Subdivision 

      Rodríguez, Lyudmila; Navazo, Isabel; Vinacua, Álvar (The Eurographics Association, 2006)
      Given a tetrahedral mesh immersed in a voxel model, we present a method to refine the mesh to reduce the discrepancy between interpolated values based on either scheme at arbitrary locations. An advantage of the method ...

    • Efficient Conservative Collision Detection for Populated Virtual Worlds 

      Fernandes, A. Ramires; Deusdado, L. (The Eurographics Association, 2006)
      Large virtual worlds, with considerable level of detail are starting to emerge everywhere, from large areas of actual cities to archaeological detailed reconstructions of sites. Populating a virtual world adds an extra ...

    • Efficient focus+context visual exploration of volume datasets 

      Campos, Jordi; Puig, Anna; Tost, Dani (The Eurographics Association, 2006)
      We propose a hierarchical representation of volume data sets based on a user-given definition of features. The model is general and it can be used for various types of feature definitions such as rendering queries, topological ...

    • Expeditious Modelling of Virtual Urban Environments with Geospatial L-systems 

      Coelho, António; Bessa, Maximino; Sousa, A. Augusto de; Ferreira, F. Nunes (The Eurographics Association, 2006)
      This paper presents Geospatial L-systems, a new extension of L-systems that incorporates geospatial awareness, and shows an application of this new tool in the expeditious modelling of urban environments, integrated with ...

    • GPU-based Evaluation of Boolean Operations on Triangulated Solids 

      Ogayar, Carlos Javier; Feito, Francisco R.; Segura, Rafael J.; Rivero, Marilina (The Eurographics Association, 2006)
      This paper presents a robust method for evaluating boolean operations on triangle meshes. It is based on a fast and reliable point-in-solid algorithm that works with B-Rep representations. With this method, several boolean ...

    • Grid Architecture for Distributed Rendering 

      Fernández-Sorribes, Jose Antonio; González-Morcillo, Carlos; Jiménez-Linares, Luis (The Eurographics Association, 2006)
      Rendering is the process by means of which a raster 2D image can be obtained from the definition of a 3D scene. This process is computationally intensive and requires a lot of time to be done when the source scene has ...

    • Individualizing the New Interfaces: Extraction of User's Emotions from Facial Data 

      Hupont, Isabelle; Cerezo, Eva (The Eurographics Association, 2006)
      When developing new multimodal user interfaces emotional user information may be of great interest. In this paper we present a simple and computationally feasible method to perform automatic emotional classification of ...

    • Interactive Cutting in Voxel-Based Objects. Application to Simulate Transurethral Resection of the Prostate 

      Joan-Arinyo, Robert; Vilaplana, Josep (The Eurographics Association, 2006)
      Simulating cutting processes of human tissue is an important feature in virtual reality systems for medical training and rehearsal. In this paper we present a method to simulate the cutting operation in voxel-based virtual ...

    • It's all in the Face: Studies on Monitoring Users' Experience 

      Branco, Pedro; Encarnação, L. Miguel; Marcos, Adérito (The Eurographics Association, 2006)
      We propose to observe users spontaneous facial expressions as a method to identify adverse-event occurrences at the user interface level. We discuss an experiment designed to investigate the association between incidents ...

    • Kit Assembly Helper in Augmented Reality 

      Almeida, Miguel Vieira; Dias, Jose Miguel Sales (The Eurographics Association, 2006)
      This paper describes an augmented reality application that aids users in assembling an object originally in a kit format, i.e. the object is received unassembled, with ordered instructions steps on how to connect each ...

    • Magic in Augmented Reality 

      Batalha, Joao; Dias, Miguel S. (The Eurographics Association, 2006)
      In this paper we suggest a new approach for playing the "Magic The Gathering" game. This approach allows the user to perform a set of game moves within this popular card game using a Tangible Augmented Reality (AR) ...

    • A Mesh-Particle Model for Fluid Animation 

      Suárez, Nuria; Susín, Antonio (The Eurographics Association, 2006)
      We use our adapted versions of the two most used methods in Computer Fluid Animation, Marker and Cell and Smoothed Particle Hydrodynamics, to develop a new method taking advantage of the calculation speed of the first and ...

    • Perceived Quality of Simplified Polygonal Meshes: Evaluation using Observer Studies 

      Silva, Samuel; Ferreira, Carlos; Madeira, Joaquim; Santos, Beatriz Sousa (The Eurographics Association, 2006)
      The complexity of a polygonal mesh model is usually reduced by applying a simplification method, resulting in a similar mesh having less vertices and faces. Although several such methods have been developed, it is not yet ...

    • Perception-based painterly rendering: functionality and interface design 

      Nunes, Samuel; Almeida, Daniel; Brito, Vera; Carvalho, Joao; Rodrigues, Joao; Buf, J. M. Hans du (The Eurographics Association, 2006)
      Painterly rendering (non-photorealistic rendering or NPR) aims at translating photographs into paintings with discrete brush strokes, simulating certain techniques (im- or expressionism) and media (oil or watercolour). ...