Recent Submissions

  • SP: a program for driving instrumentation for a PC 

    Pérez Vidal, Lluís (1990-11-21)
    External research report
    Open Access
  • Modelat sòlid: realització d'operacions booleanes amb model de fronteres 

    Ayala Vallespí, M. Dolors (1989)
    External research report
    Open Access
    Aquest treball presenta un algorisme per realitzar operacions booleanes amb model de fronteres. Es basa en un algorisme en 2D per polígons. L'algorisme consta de 4 passos. Els tres primers son comuns a qualsevol operació ...
  • A survey of computer animation 

    Pueyo Sandez, Francesc Xavier; Tost Pardell, Daniela (1987-05)
    External research report
    Open Access
    A survey on computer animation is presented with three specific goals: - To clarify what people understand by computer animation. - To separate the different aspects of computer animation and underline its main problems. - ...
  • Implementación de un algoritmo vectorial para la eliminación de partes ocultas en escenas poliédricas 

    Joan Arinyo, Robert (1987-12)
    External research report
    Open Access
    An important problem in the dessign of Solid Modelling Systems is the one related with the realistic model rendering. Up until now, several algorithms dealing with this topic have been developed. Most of these algorithms ...
  • The Extreme Vertices Model (EVM) for orthogonal polyhedra 

    Aguilera, A; Ayala Vallespí, M. Dolors (1997-01)
    External research report
    Open Access
    Orthogonal Polyhedra offer a worthy-to-explore simplification. In this work we propose a specific model for representing orthogonal polyhedra that allows simple and robust algorithms for performing the most usual and ...
  • La modularidad de la mente: origen y transformación de una metáfora 

    Gracia, Manuel de; Vigo Anglada, Marc (2001-05)
    External research report
    Open Access
    In this work we try to make clear the actual reference of the modular hypothesis of the mind, and the epistemological and ontological relevance of the metaphor. We also make a critical evaluation of the contribution of ...
  • h-graphs: A new representation for tree decompositions of graphs 

    Hidalgo Garcia, Marta; Joan Arinyo, Robert (2014)
    External research report
    Open Access
    In geometric constraint solving, well constrained geometric problems can be abstracted as Laman graphs. If the graph is tree decomposable, the constraint-based geometric problem can be solved by a Decomposition-Recombination ...
  • On tree decomposability of Henneberg graphs 

    Hidalgo, Marta R.; Joan Arinyo, Robert (2014)
    External research report
    Open Access
    In this work we describe an algorithm that generates well constrained geometric constraint graphs which are solvable by the tree-decomposition constructive technique. The algorithm is based on Henneberg constructions and ...
  • Orientation, sphericity and roundness evaluation of particles using alternative 3D representations 

    Cruz Matías, Irving; Ayala Vallespí, M. Dolors (2014)
    External research report
    Open Access
    Sphericity and roundness indices have been used mainly in geology to analyze the shape of particles. In this paper, geometric methods are proposed as an alternative to evaluate the orientation, sphericity and roundness ...
  • A practical and robust method to compute the boundary of three-dimensional axis-aligned boxes 

    López Monterde, Daniel; Martínez Bayona, Jonas; Vigo Anglada, Marc; Pla García, Núria (2013)
    External research report
    Open Access
    The union of axis-aligned boxes results in a constrained structure that is advantageous for solving certain geometrical problems. A widely used scheme for solid modelling systems is the boundary representation (Brep). We ...
  • Back-to-front orderings of triangles in triangulated terrains over regular grids 

    Alonso Alonso, Jesús; Joan Arinyo, Robert (2013)
    External research report
    Open Access
    In this work we report on a complete and correct set of configurations to realistically rendering triangulated heightfields dedined over regular grids by visiting triangles in a back-to-front order. The experiments conducted ...
  • Interaction techniques in virtual environments 

    Moya Santos, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela (2013)
    External research report
    Open Access
    Virtual environments are used in very diverse applications: from leisure games to professional training and rehabilitation systems. In these applications, users interact with the elements of the environments through avatars ...

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