Fábio F. Bernardon

Learn More
We propose a new hardware ray casting algorithm for unstructured meshes composed of tetrahedral cells. Our work builds on the technique published at IEEE Visualization 2003 by Weiler et al.. Our contributions can be divided into three categories. First, we propose an alternate representation for mesh data in 2D textures that is more compact and efficient,(More)
Interactive visualization of time-varying volume data is essential for many scientific simulations. This is a challenging problem since this data is often large, can be organized in different formats (regular or irregular grids), with variable instances of time (from hundreds to thousands) and variable domain fields. It is common to consider subsets of this(More)
Volume Rendering of time-varying datasets is essential in several scientific applications. Due to the enormous amount of data involved, in datasets with static sampling regions it is common to consider only time-varying scalar fields (TVSFs). The use of Vector Quantization (VQ) to compress scalar fields has been shown to be quite effective when combined(More)
Real-time rendering of large unstructured meshes is a major research goal in the scientific visualization community. While, for regular grids, texture-based techniques are well-suited for current Graphics Processing Units (GPUs), the steps necessary for rendering unstructured meshes are not so easily mapped to current hardware. This paper reviews volume(More)
Interactive visualization of time-varying volume data is essential for many scientific simulations. This is a challenging problem since this data is often large, can be organized in different formats (regular or irregular grids), with variable instances of time (from few hundreds to thousands) and variable domain fields. It is common to consider subsets of(More)
Transfer functions play a critical role in feature detection through direct volume rendering in volumetric scalar fields. Because of the inherent difficulties of exploratory visualization, assisting the user in transfer function specification is still an important area of research. In particular, the disparate nature of simulated and measured volumetric(More)
Being able to create insightful visualizations from both simulated and measured data is important for the visualization community. For scalar volumes, direct volume rendering has proved a useful tool for data exploration. Using a transfer function, we can map scalar values to colors and opacities to identify and enhance important features. Although(More)
  • 1