Now showing items 1-8 of 8

  • Batch-based visualization of large multiresolution polygonal models 

    Charalambos, Jean Pierre; Vilaplana Pastó, Josep (2005-11)
    External research report
    Open Access
    In this report we study some techniques for the visualization of large multiresolution polygonal models, some of which do not fit into main memory. We focus our attention in batch-based techniques. The main idea is to ...
  • Computing the medial axis transform of polygonal domains by tracing paths 

    Joan Arinyo, Robert; Pérez Vidal, Lluís; Vilaplana Pastó, Josep (1999-04)
    External research report
    Open Access
    A practical algorithm for computing the medial axis transform of 2D polygonal domains is presented. The algorithm computes the medial axis by tracing its paths. The medial axis is generated in the form of a graph where ...
  • Computing the medial axis transform of polygonal objects by testing discs 

    Vilaplana Pastó, Josep (1996-10)
    External research report
    Open Access
    An algorithm for computing the medial axis transform of 2D polygonal domains is presented. It exploits the full connectivity of the medial axis in polygonal domains by advancing a previously known maximal inscribed disc ...
  • Declarative characterization of a general architecture for constructive geometric constraint solvers 

    Joan Arinyo, Robert; Soto Riera, Antoni; Vila Marta, Sebastià; Vilaplana Pastó, Josep (2002-02)
    External research report
    Open Access
    Geometric constraint solving is a growing field devoted to solve geometric problems defined by relationships, called constraints, established between the geometric elements. There are several techniques to solve ...
  • Multilevel use of coherence for complex radiosity environments 

    Vilaplana Pastó, Josep; Pueyo Sánchez, Xavier (1993-02)
    External research report
    Open Access
    The performance of radiosity algorithm has been improved in the last years by means of using coherence when evaluating the visibility function for form factor computation. We present here a characterization of the uses of ...
  • Revisiting decomposition analysis of geometric constraint graphs 

    Joan Arinyo, Robert; Soto Riera, Antoni; Vila Marta, Sebastià; Vilaplana Pastó, Josep (2002-02)
    External research report
    Open Access
    Geometric problems defined by constraints can be represented by geometric constraint graphs whose nodes are geometric elements and whose arcs represent geometric constraints. Reduction and decomposition are techniques ...
  • Transforming an under-constrained geometric constraint problem into a well-constrained one 

    Joan Arinyo, Robert; Soto Riera, Antoni; Vila Marta, Sebastià; Vilaplana Pastó, Josep (2002-12)
    External research report
    Open Access
    We present an approach for handling geometric constraint problems with under-constrained configurations. The approach works by completing the given set of constraints with constraints that can be defined either ...
  • Volume cutting to simulate transurethral resection of the prostate 

    Joan Arinyo, Robert; Vilaplana Pastó, Josep (2006-02)
    External research report
    Open Access
    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 ...