Aluno: José Abel Ticona Larico
Orientadora: Profª. Drª. Luciana Porcher Nedel
Título: Towards Interactive Simulation of Soft, Rigid and Viscous Objects in Immersive Virtual Reality
Linha de pesquisa: Computação Gráfica e Visualização de Dados
Esta banca ocorrerá excepcionalmente de forma totalmente remota. Interessados em assistir a defesa poderão acessar a sala virtual através do link: https://mconf.ufrgs.br/webconf/ppgc
– Prof. Dr. Marcelo Walter (UFRGS – por videoconferência)
– Prof. Dr. Esteban Walter Gonzalez Clua (UFF – por videoconferência)
– Profª. Drª. Carla Maria Dal Sasso Freitas (UFRGS – por videoconferência)
Presidente da Banca: Profª. Drª. Luciana Porcher Nedel
Abstract: Objects composed of fluids, rigid, and soft bodies are present in our planet, and people interact with them in their daily life. Also, some materials change their shape and behavior due to changements on physical properties depending on environmental conditions such as air pressure, and heat. This is known as phase-change phenomena. They are present in the melting of snow when winter ends, the solidification of rocks into a volcanic eruption, the evaporation of a fluid when it reaches its boiling temperature, or the evaporation of the oceans due to the temperature increase. The current development of physics-based animation attempts to simulate materials and their phase-change transitions. However, there is still not a method to unify all transitions between the states of the material, nor an intuitive tool to allow users to interact with materials in different states in real time. In this work, we propose a particle-based framework that provides the interaction between the different states and their transitions during the phase-change, as well as a real-time virtual tool that allows interacting with a wide range of materials such as fluids, rigid, and soft bodies using immersive virtual reality. Extended Position-Based Dynamics (XPBD) and Smoothed Particle Hydrodynamic (SPH) interactive methods were modified and adapted to support heat-transference and to allow natural interaction in virtual reality. We demonstrate that the interactive methods proposed allow reaching plausible visual simulations. Our results show that the reproduction of melting, solidification, evaporation, and condensation phenomena is closer to reality, furthermore including the visualization of the dilation and convection effects. Another result reached is the high realism of the 3D models in Virtual Reality because of the modeling inspired in Physics to enrich 3D drawings with dynamic behaviors, and the ability for users to interact with the model dynamically, modeling it as it moves, deforms, and falls. Our proposal is based on interactive methods and has a low computation cost.
Keywords: Physically-based Animation, Extension Position-Based Dynamic, Smooth Particle Hydrodynamic, Virtual Reality, Shifting Phase, 3D Sketching.