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- Antonio Elias Fabris, A. Robin Forrest
- SIGGRAPH
- 1997

Pre-filtering is generally considered the ideal approach to antialiasing but is difficult to perform exactly for complex geometries such as curves or for arbitrary choice of filters. We present a discrete pre-filtering technique for anti-aliasing Bézier curves using arbitrary filters which is numerically and geometrically robust and whose accuracy is… (More)

Modeling natural phenomena is a problem that has been studied for a long time in Computer Graphics. A problem that currently arises is how to render and animate realistically natural phenomena in real-time. This paper presents a technique to model underbrush with fast and realistic animation. Pre-computations and a simplified physically based model were… (More)

The Point Containment predicate which specifies if a point is part of a mathematically defined shape or not is one of the most basic notions in raster graphics. This paper presents a technique to counteract the main disadvantage of Point Containment algorithms: their quadratic time complexity with increasing resolution. The implemented algorithm handles… (More)

- Antonio Elias Fabris, Valério Ramos Batista
- ArXiv
- 2012

Region filling is one of the most important and fundamental operations in computer graphics and image processing. Many filling algorithms and their implementations are based on the Euclidean geometry, which are then translated into computational models moving carelessly from the continuous to the finite discrete space of the computer. The consequences of… (More)

- P. L. E. Velha, Antonio Elias Fabris
- WSCG
- 2003

This paper introduces a new technique for modeling signal and nutrient propagation in plant models to counteract the main disadvantages of current methods: the difficulty of setting the velocity of the propagation and the complexity of models with many signals. This technique uses implicit parameters and global propagation functions, offering a better… (More)

Recent advances in Agricultural Engineering include image processing, robotics and geographic information systems (GIS). Some tasks are still accomplished manually, like drawing plantation lines that optimize productivity. Herewith we present an algorithm to find the optimal plantation lines in linear time. The algorithm is based upon classical results of… (More)

This paper presents a new pre-filtering technique for antialiasing two-dimensional continuous curves which enables the correct handling of the geometry (self intersections, small loops, cusps, curves with high and small radius of curvature, etc.) using a generic class of filters. Moreover, the technique allow for rendering curves of arbitrary thickness and… (More)

- Antonio Elias Fabris, Marcos Machado Ottani Assis, A. Robin Forrest
- SIBGRAPI
- 2000

- Luis Carlos Yano Endo, Carlos Hitoshi Morimoto, Antonio Elias Fabris
- International 2005 Computer Graphics
- 2005

This paper introduces JEcoSys, an extensible framework developed in Java to generate interactive simulations of plants. JEcoSys uses a simple physical model of plants, based on dynamic constraints, and pre-computations to achieve realism and efficiency during animation. The framework also includes a force field based technique to model the interaction of… (More)

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