Matemática e Estatística | Comunicações em congressos, conferências e seminários / Communications in congresses, conferences
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Browsing Matemática e Estatística | Comunicações em congressos, conferências e seminários / Communications in congresses, conferences by Subject "Anamorphosis"
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- Anamorphosis: optical games with perspective's playful parentPublication . Araújo, AntónioWe explore conical anamorphosis in several variations and discuss its various constructions, both physical and diagrammatic. While exploring its playful aspect as a form of optical illusion, we argue against the prevalent perception of anamorphosis as a mere amusing derivative of perspective and defend the exact opposite view - that perspective is the derived concept, consisting of plane anamorphosis under arbitrary limitations and ad-hoc alterations. We show how to define vanishing points in the context of anamorphosis in a way that is valid for all anamorphs of the same set. We make brief observations regarding curvilinear perspectives, binocular anamorphoses, and color anamorphoses.
- Boxing the visual sphere: towards a systematic solution of the cubical perspectivePublication . Araújo, António; Olivero, Lucas; Rossi, AdrianaCubic perspective is an attractive option for drawing VR panoramas, as it carries with it the familiarity of classical perspective and its ease of drawing line segments. Its simplicity is however only apparent as the transition of line images between the various planes of the cube can be baffling to the draughtsman. We argue that the best way to systematize this perspective is to see it fully as a spherical perspective and start by classifying and rendering its geodesics.
- A GeoGebra tool for drawing immersive perspectivesPublication . Araújo, AntónioSpherical perspective provides a connection between traditional handmade drawings and virtual reality environments, which can be exploited to create new forms of hybrid immersive artworks. We discuss the use of GeoGebra tools as auxiliary software for the creation of immersive designs in azimuthal equidistant (360-degree fisheye) spherical perspective.
- A geometria (descritiva) da anamorfose e das perspectivas curvilíneasPublication . Araújo, AntónioA anamorfose, enquanto artifício mimético, é o conceito fundamental que sustenta a perspectiva clássica e as perspectivas curvilíneas centrais. Enquanto conceito transversal merece uma plataforma, que presentemente não ocupa, no ensino das perspectivas, da geometria descritiva, e da realidade mista em computação gráfica e arte digital. Nesta palestra damos um panorama de vários trabalhos recentes do presente autor que pretendem contribuir para a criação de tal plataforma.