Now showing items 21-40 of 59

  • GL-Socket: A CG plugin-based framework for teaching and assessment 

    Andújar Gran, Carlos Antonio; Chica Calaf, Antonio; Fairén González, Marta; Vinacua Pla, Álvaro (European Association for Computer Graphics (Eurographics), 2018)
    Conference report
    Open Access
    In this paper we describe a plugin-based C++ framework for teaching OpenGL and GLSL in introductory Computer Graphics courses. The main strength of the framework architecture is that student assignments are mostly independent ...
  • Immersive data comprehension: visualizing uncertainty in measurable models 

    Brunet Crosa, Pere; Andújar Gran, Carlos Antonio (2015-09-29)
    Article
    Open Access
    Recent advances in 3D scanning technologies have opened new possibilities in a broad range of applications including cultural heritage, medicine, civil engineering, and urban planning. Virtual Reality systems can provide ...
  • Impostor-based crowd rendering 

    Beacco Porres, Alejandro; Pelechano Gómez, Núria; Andújar Gran, Carlos Antonio (CRC Press, 2016-09-27)
    Part of book or chapter of book
    Restricted access - publisher's policy
    Real-time rendering of detailed animated characters in crowd simulations is still a challenging problem in computer graphics. State-of-the-art approaches can render up to several thousand agents by consuming most of the ...
  • Improving 3D selection in VEs through expanding targets and forced disocclusion 

    Argelaguet Sanz, Fernando; Andújar Gran, Carlos Antonio (Springer Verlag, 2008-08-27)
    Conference report
    Restricted access - publisher's policy
    In this paper we explore the extension of 2D pointing facilitation techniques to 3D object selection. We discuss what problems must be faced when adapting such techniques to 3D interaction on VR applications, and we propose ...
  • Inexpensive reconstruction and rendering of realistic roadside landscapes 

    Andújar Gran, Carlos Antonio; Chica Calaf, Antonio; Vico Moya, Miguel Ángel; Moya Santos, Sergio; Brunet Crosa, Pere (2014-09-01)
    Article
    Open Access
    In this paper, we present an inexpensive approach to create highly detailed reconstructions of the landscape surrounding a road. Our method is based on a space-efficient semi-procedural representation of the terrain and ...
  • Integrating occlusion culling and levels of detail through hardly-visible sets 

    Andújar Gran, Carlos Antonio; Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel; Brunet Crosa, Pere (North Holland, 2000-12)
    Article
    Restricted access - publisher's policy
    Occlusion culling and level-of-detail rendering have become two powerful tools for accelerating the handling of very large models in real-time visualization applications. We present a framework that combines both techniques ...
  • Integrating occlusion culling and levels of detail through hardly-visible sets 

    Andújar Gran, Carlos Antonio; Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel; Brunet Crosa, Pere (2000-01)
    External research report
    Open Access
    Occlusion culling and level-of-detail rendering have become two powerful tools for accelerating the handling of very large models in real-time visualization applications. We present a framework to combine both techniques ...
  • Locally-adaptive texture compression 

    Andújar Gran, Carlos Antonio; Martínez Bayona, Jonás (2009)
    Conference report
    Restricted access - publisher's policy
    Current schemes for texture compression fail to exploit spatial coherence in an adaptive manner due to the strict efficiency constraints imposed by GPU-based, fragment-level decompression. In this paper we present a texture ...
  • LOD visibility culling and occluder synthesis 

    Andújar Gran, Carlos Antonio; Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel (Elsevier, 2000-11)
    Article
    Open Access
    Level-of-detail occlusion culling is a novel approach to the management of occluders that can be easily integrated into most current visibility culling algorithms. The main contribution of this paper is an algorithm that ...
  • LOD visibility culling and occluder synthesis 

    Andújar Gran, Carlos Antonio; Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel (2000-01)
    External research report
    Open Access
    Level-of-detail occlusion culling is a novel approach to the management of occluders that can be easily integrated into most current visibility culling algorithms. The main contribution of this paper is an algorithm ...
  • MDCO to B-Rep conversion algorithm 

    Ayala Vallespí, M. Dolors; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere (1995-07)
    External research report
    Open Access
    Spatial enumeration models are widely used in several fields. These models are approximate but the major disadvantage is the lack of concision. In order to avoid such verbosity, hierarchical encodings such as octrees have ...
  • Mesh repair with user-friendly topology control 

    Hétroy, Franck; Rey, Stéphanie; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Vinacua Pla, Álvaro (Elsevier, 2011-01)
    Article
    Restricted access - publisher's policy
    Limitations of current 3D acquisition technology often lead to polygonal meshes exhibiting a number of geometrical and topological defects which prevent them from widespread use. In this paper we present a new method for ...
  • Multi-scale manipulation in indoor scenes with the World in Miniature Metaphor 

    Trueba Hornero, Ramón; Andújar Gran, Carlos Antonio; Argelaguet Sanz, Fernando (2009)
    Conference report
    Restricted access - publisher's policy
    The World in Miniature Metaphor (WIM) allows users to select, manipulate and navigate efficiently in virtual environments. In addition to the first-person perspective offered by typical VR applications, the WIM offers a ...
  • NightLighting: a nocturnal urban illumination approach 

    Muñoz Pandiella, Imanol; Andújar Gran, Carlos Antonio; Patow, Gustavo Ariel (European Association for Computer Graphics (Eurographics), 2013)
    Conference report
    Restricted access - publisher's policy
    Real time rendering of cities with realistic global illumination is still an open problem. In this paper we propose a two-step algorithm to simulate the nocturnal illumination of a city. The first step computes an approximate ...
  • Omni-directional relief impostors 

    Andújar Gran, Carlos Antonio; Boo, J; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Vinacua Pla, Álvaro (North Holland, 2007-07)
    Article
    Restricted access - publisher's policy
    Relief impostors have been proposed as a compact and high-quality representation for high-frequency detail in 3D models. In this paper we propose an algorithm to represent a complex object through the combination of ...
  • Optimal iso-surfaces 

    Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (2004-05)
    Article
    Open Access
    Since the publication of the original Marching Cubes algorithm, numerous variations have been proposed for guaranteeing water-tight constructions of triangulated approximations of iso-surfaces. Most approaches divide the ...
  • Optimizing the topological and combinatorial complexity of isosurfaces 

    Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (Elsevier, 2005-07)
    Article
    Open Access
    Since the publication of the original Marching Cubes algorithm, numerous variations have been proposed for guaranteeing water-tight constructions of triangulated approximations of isosurfaces. Most approaches divide the ...
  • Output-sensitive rendering of detailed animated characters for crowd simulation 

    Spanlang, Bernhard; Andújar Gran, Carlos Antonio; Pelechano Gómez, Núria; Beacco Porres, Alejandro (2010)
    Conference report
    Restricted access - publisher's policy
    Rendering detailed animated characters is a major limiting factor in crowd simulation. In this paper we present a new representation for 3D animated characters which supports output-sensitive rendering. Each character is ...
  • Pressing: Smooth isosurfaces with flats from binary grids 

    Chica Calaf, Antonio; Williams, J.; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Rossignac, J.; Vinacua Pla, Álvaro (2006-02)
    External research report
    Open Access
    We explore the automatic recovery of solids from their volumetric discretizations. In particular, we propose an approach, called Pressing, for smoothing isosurfaces extracted from binary volumes while recovering their large ...
  • Relief impostor selection for large scale urban rendering 

    Andújar Gran, Carlos Antonio; Díaz Iriberri, José; Brunet Crosa, Pere (2008)
    Conference lecture
    Open Access
    Image-based rendering techniques are often the preferred choice to accelerate the exploration of massive outdoor models and complex human-made structures. In the last few years, relief mapping has been shown to be extremely ...