On Improving Urban Environment Representations

Computer Graphics has evolved into a mature and powerful field that offers many opportunities to enhance different disciplines, adapting to the specific needs of each. One of these important fields is the design and analysis of Urban Environments. In this article we try to offer a perspective of one of the sectors identified in Urban Environment studies: Urbanization. More precisely we focus on geometric and appearance modeling, rendering and simulation tools to help stakeholders in key decision stages of the process

A PERSPECTIVE ON PROCEDURAL MODELING BASED ON STRUCTURAL ANALYSIS

[EN] We introduce a study focused on procedural modeling papers that use methods of structural analysis, especially in its application to historic buildings such as churches and cathedrals. Moreover, we have taken a geometric structure of one of these papers and studied their behavior in a generic simulation tool, thus showing the feasibility of its analysis with non-specialized tools.[ES] Introducimos un estudio centrado en aquellos trabajos de modelado procedural que utilizan métodos de análisis estructural, especialmente en su aplicación para edificios históricos como iglesias y catedrales. Por otra parte, hemos tomado una estructura geométrica de uno de estos artículos y estudiado su comportamiento en una herramienta de simulación genérica, mostrando su factibilidad para realizar análisis con herramientas no especializadas.Fita, JL.; Besuievsky, G.; Patow, GA. (2016). A PERSPECTIVE ON PROCEDURAL MODELING BASED ON STRUCTURAL ANALYSIS. En 8th International congress on archaeology, computer graphics, cultural heritage and innovation. Editorial Universitat Politècnica de València. 264-266. https://doi.org/10.4995/arqueologica8.2015.304526426

Estructuras geométricas jerárquicas para la modelización de escenas 3d

This work surveys on the principal hierarchical geometric structures used to represent 3D scenes. We also present the basic algorithms to work with them, an overview on some recent works and a comparative discussion. This work has been the outcomes of the graduate course "Estructuras geometricas jerarquicas" given within the Software Phd. program at Software Department of this university

Physically inspired technique for modeling wet absorbent materials

The visual appearance of materials depends on their intrinsic light transfer properties, the illumination and camera conditions, and other environmental factors. This is in particular the case of porous, rough, or absorbent materials, where the presence of liquid on the surface alters significantly their BRDF, which in turn results in considerable changes in their visual appearance. For this reason, rendering materials change their appearance when wet continues to be a relevant topic in computer graphics. This is especially true when real-time photo-realistic rendering is required in scenes involving this kind of materials in interaction with water or other liquids. In this paper, we introduce a physically inspired technique to model and render appearance changes of absorbent materials when their surface is wet. First, we develop a new method to solve the interaction between the liquid and the object surface using its own underlying texture coordinates. Then, we propose an algorithm to model the diffusion phenomenon that occurs in the interface between a solid porous object and a liquid. Finally, we extend a model that explains the change of appearance of materials under wet conditions, and we implement it achieving real-time performance. The complete model is developed using GPU acceleration.Fil: Bajo, Juan Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ciencias e Ingeniería de la Computación; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; ArgentinaFil: Delrieux, Claudio Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; ArgentinaFil: Patow, Gustavo A.. Universidad de Girona; Españ

Realistic Buoyancy Model for Real-Time Applications

Following Archimedes' Principle, any object immersed in a fluid is subject to an upward buoyancy force equal to the weight of the fluid displaced by the object. This simple description is the origin of a set of effects that are ubiquitous in nature, and are becoming commonplace in games, simulators and interactive animations. Although there are solutions to the fluid-to-solid coupling problem in some particular cases, to the best of our knowledge, comprehensive and accurate computational buoyancy models adequate in general contexts are still lacking. We propose a real-time Graphics Processing Unit (GPU) based algorithm for realistic computation of the fluid-to-solid coupling problem, which is adequate for a wide generality of cases (solid or hollow objects, with permeable or leak-proof surfaces, and with variable masses). The method incorporates the behaviour of the fluid into which the object is immersed, and decouples the computation of the physical parameters involved in the buoyancy force of the empty object from the mass of contained liquid. The dynamics of this mass of liquid are also computed, in a way such that the relation between the centre of mass of the object and the buoyancy force may vary, leading to complex, realistic beha viours such as the ones arising for instance with a sinking boat.Fil: Bajo, Juan Miguel. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; ArgentinaFil: Patow, Gustavo A.. Universidad de Girona; EspañaFil: Delrieux, Claudio Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras; Argentin

CEV 2022 - 1st Spanish Congress on Videogames 2022

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