Lodstrips. Continuous level of detail using triangle strips

• Autores: José Francisco Ramos Romero
• Directores de la Tesis: Miguel Chover Sellés (dir. tes.)
• Lectura: En la Universitat Jaume I ( España ) en 2008
• Idioma: inglés
• ISBN: 9788469152522
• Número de páginas: 134
• Tribunal Calificador de la Tesis: Roberto Agustín Vivó Hernando (presid.) , Ricardo Quirós Bauset (secret.) , Ivana Kolingerova (voc.) , Michael Gould (voc.) , Mateu Sbert Casasayas (voc.)
• Enlaces
  • Tesis en acceso abierto en: TDX
• Resumen
  • español

    El objetivo principal de tesis consiste en mejorar la visualización interactiva de mallas poligonales, Inicialmente, se estudian las técnicas fundamentales para visualizar eficientemente mallas poligonales.

    Seguidamente, se analizan exhaustivamente las técnicas referentes a simplificación de geometría y nivel de detalle. Finalmente, se presenta un modelo de visualización genérico que utiliza primitivas de visualizaciones eficientes. Este modelo se adapta para ser utilizado en entornos con que utilizan generalmente mallas de resolución uniforme. También, se utilizan las nuevas funcionalidades de las tarjetas gráficas para optimizar el modelo y se aplica a mallas deformables. Finalmente, se integra el modelo en un motor de juegos.

  • English

    In recent years, multiresolution models have progressed substantially. At the beginning, discrete models were employed in graphics applications, due mainly to the low degree of complexity involved in implementing them, which is the reason why nowadays they are still used in applications without high graphics requirements. Nevertheless, the increase in realism in graphics applications makes it necessary to use multiresolution models which are more exact in their approximations, which do not call for high storage costs and which are faster in visualization. This has given way to continuous models, where two consecutive levels of detail only differ by a few polygons and where, additionally, the duplication of information is avoided to a considerable extent, thus improving on the spatial cost offered by most discrete models.

    Advances have been made in the use of new graphics primitives which minimize the data transfer between the CPU and the GPU, apart from trying to make use of the connectivity information given by a polygonal mesh. For this purpose, graphics primitives with implicit connectivity, such as triangle strips and triangle fans, have been developed. Many continuous models based on this type of primitives have been recently developed. In these last few years, graphics hardware performance has evolved outstandingly, giving rise to new techniques which allow the continuous models to accelerate even more.

    In this work, we have improved the interactive render of polygonal meshes. To tackle the problem, we firstly studied fundamental techniques to efficiently render polygonal meshes and we later made use of geometry simplification and level of detail techniques. Thus, we defined a multiresolution model that represents a polygonal mesh at any given resolution. This approach is able to manage continuous level-of-detail by smoothly adapting mesh resolution to the application requirements. Moreover, the model was modified to take the maximum advantage of the recent GPU features. We also created a modified version of the model for being used in deforming meshes. Finally, we developed an independent library to integrate our model in real-time applications.