Now showing items 1-20 of 54

    • 3D model deformations with arbitrary control points 

      Cerveró Abelló, Maria Àngels; Vinacua Pla, Álvaro; Brunet Crosa, Pere (2016-06-01)
      Article
      Open Access
      Cage-based space deformations are often used to edit and animate images and geometric models. The deformations of the cage are easily transferred to the model by recomputing fixed convex combinations of the vertices of the ...
    • 3D triangular mesh to represent the left ventricle volume of the heart 

      Rodriguez, Lyudmila; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2002-07-01)
      External research report
      Open Access
      This report describes an algorithm for the generation of unstructured tetrahedral meshes from two triangular meshes: the internal and external walls of an object. The tetrahedral mesh thus obtained represents the volume ...
    • A general illumination model for molecular visualization 

      Hermosilla Casajús, Pedro; Vázquez Alcocer, Pere Pau; Vinacua Pla, Álvaro; Ropinski, Timo (2018-06)
      Article
      Open Access
      Several visual representations have been developed over the years to visualize molecular structures, and to enable a better understanding of their underlying chemical processes. Today, the most frequently used atom-based ...
    • A multi-projector CAVE system with commodity hardware and gesture-based interaction 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Vinacua Pla, Álvaro; Vico Moya, Miguel Ángel; Díaz García, Jesús (2017-01-12)
      External research report
      Open Access
      Spatially-immersive systems such as CAVEs provide users with surrounding worlds by projecting 3D models on multiple screens around the viewer. Compared to alternative immersive systems such as HMDs, CAVE systems are a ...
    • A Parser-based tool to assist instructors in grading computer graphics assignments 

      Andújar Gran, Carlos Antonio; Vijulie, Cristina Raluca; Vinacua Pla, Álvaro (European Association for Computer Graphics (Eurographics), 2019)
      Conference report
      Open Access
      Although online e-learning environments are increasingly used in university courses, manual assessment still dominates the way students are graded. Interactive judges providing a pass/fail verdict based on test sets are ...
    • A Survey on curve and surface fairing 

      Vivo Lorenzo, Manuel; Vinacua Pla, Álvaro (1998-09)
      External research report
      Open Access
      Sculptured or free-form surface design is a broadly used tool in industry. This report studies the existing automatic fairing methods for curves and surfaces. A classification is established and advantages and drawbacks ...
    • A Tool for N-way analysis of programming exercises 

      Andújar Gran, Carlos Antonio; Comino Trinidad, Marc; Fairén González, Marta; Vinacua Pla, Álvaro (European Association for Computer Graphics (Eurographics), 2020)
      Conference report
      Open Access
      Programming exercises are a corner stone in Computer Science courses. If used properly, these exercises provide valuable feedback both to students and instructors. Unfortunately, the assessment of student submissions through ...
    • A topological comparison of surface extraction algorithms 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2006-01)
      External research report
      Open Access
      In many application areas, it is useful to convert the discrete information stored in the nodes of a regular grid into a continuous boundary model. Isosurface extraction algorithms di er on how the discrete information in ...
    • Adaptive on-the-fly molecular ribbons generation 

      Hermosilla, Pedro; Guallar, Víctor; Vinacua Pla, Álvaro; Vázquez Alcocer, Pere Pau (European Association for Computer Graphics (Eurographics), 2015)
      Conference lecture
      Open Access
      Molecular dynamics simulations are of key importance in the drug design field. One common used representation to visualize these simulations is the Ribbons representation, which gives to the expert a good overview of the ...
    • Approximation of a variable density cloud of points by shrinking a discrete membrane 

      Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (North Holland, 2005-12)
      Article
      Restricted access - publisher's policy
      This paper describes a method to obtain a closed surface that approximates a general 3D data point set with nonuniform density. Aside from the positions of the initial data points, no other information is used. Particularly, ...
    • Approximation of a variable density cloud of points by shrinking a discrete membrane 

      Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (2002-12)
      External research report
      Open Access
      This paper describes a method to obtain a closed surface that approximates a general 3D data point set with non-uniform density. Excluding the initial data points, any other previous information is not used (as, for ...
    • ATLAS, a platform for distributed graphics applications 

      Fairén González, Marta; Vinacua Pla, Álvaro (1997)
      Conference report
      Open Access
      ATLAS, a platform for developing distributed applications by splitting them into several collaborating processes scattered in a local area network is presented. Although of general use, it has features especially designed ...
    • ATLAS, a platform for distributed graphics applications 

      Fairén González, Marta; Vinacua Pla, Álvaro (1997-11)
      External research report
      Open Access
      ATLAS, a platform for developing distributed applications by splitting them into several collaborating processes scattered in a local area network is presented. Although of general use, it has features especially designed ...
    • ATLAS, a platform for transparently developing distributed applications 

      Fairén González, Marta; Vinacua Pla, Álvaro (Yi Pan, Selim G. Akl, Kegin Li. Anaheim, USA, 1998)
      Conference report
      Open Access
      We discuss the design and implementation of a software development platform that allows unsophisticated programmers to include advanced features to their applications with no or very little extra information and effort. ...
    • ATLAS: a platform for transparently developing distributed applications 

      Fairén González, Marta; Vinacua Pla, Álvaro (1997-11)
      External research report
      Open Access
      We discuss the design and implementation of a software development platform that allows unsophisticated programmers to include advanced features to their applications with no or very little extra information and effort. ...
    • Automatic code generation for ATLAS communications drivers 

      Vivo Lorenzo, Manuel; Fairén González, Marta; Vinacua Pla, Álvaro (1999-12)
      External research report
      Open Access
      ATLAS is a software development platform created in our Department. Among other benefits, it provides support to easily distribute applications over a network. In these applications, communications issues among the different ...
    • Biharmonic fields and mesh completion 

      Argudo Medrano, Óscar; Brunet Crosa, Pere; Chica Calaf, Antonio; Vinacua Pla, Álvaro (2015-11)
      Article
      Open Access
      We discuss bi-harmonic fields which approximate signed distance fields. We conclude that the bi-harmonic field approximation can be a powerful tool for mesh completion in general and complex cases. We present an adaptive, ...
    • Computing maximal tiles and application to impostor-based simplification 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (North Holland, 2004-08)
      Article
      Restricted access - publisher's policy
      The computation of the largest planar region approximating a 3D object is an important problem with wide applications in modeling and rendering. Given a voxelization of the 3D object, we propose an efficient algorithm to ...
    • Data-driven tetrahedral mesh subdivision 

      Rodríguez Pérez, Lyudmila Odalina; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (North Holland, 2007-12)
      Article
      Restricted access - publisher's policy
      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 ...
    • Data-driven tetrahedral mesh subdivision 

      Rodríguez Pérez, Lyudmila Odalina; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2006-09)
      External research report
      Open Access
      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 ...