Drawing equirectangular VR panoramas with ruler, compass, and protractor

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorAraújo, António-
Data de aceite: dc.date.accessioned2019-08-21T17:13:50Z-
Data de disponibilização: dc.date.available2019-08-21T17:13:50Z-
Data de envio: dc.date.issued2018-04-06-
Data de envio: dc.date.issued2018-04-06-
Data de envio: dc.date.issued2018-04-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/10400.2/7260-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.7559/citarj.v10i1.471-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/10400.2/7260-
Descrição: dc.descriptionThis work presents a method for drawing Virtual Reality panoramas by ruler and compass operations. VR panoramas are immersive anamorphoses rendered from equirectangular spherical perspective data. This data is usually photographic, but some artists are creating hand-drawn equirectangular perspectives to be visualized in VR. This practice, that lies interestingly at the interface between analog and digital drawing, is hindered by a lack of method, as these drawings are usually done by trial-and-error, with ad-hoc measurements and interpolation of pre-computed grids, a process with considerable artistic limitations. I develop here the analytic tools for plotting all great circles, line images and their vanishing points, and then show how to achieve these constructions through descriptive geometry diagrams that can be executed using only ruler, compass, and protractor. Approximations of line images by circular arcs and sinusoids are shown to have acceptable errors for low values of angular elevation. The symmetries of the perspective are studied and their uses for improving gridding methods are discussed.-
Descrição: dc.descriptionThis work was supported by Artech-Int, Associação Internacional de Arte Computacional, and by Portuguese national funds through FCT- Fundação para a Ciência e a Tecnologia, within project UID/Multi/04019/2013.-
Descrição: dc.descriptioninfo:eu-repo/semantics/publishedVersion-
Idioma: dc.languageen-
Publicador: dc.publisherPortuguese Catholic University-
Relação: dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147384/PT-
Relação: dc.relationhttp://dx.doi.org/10.7559/citarj.v10i1.471-
Direitos: dc.rightsopenAccess-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
Palavras-chave: dc.subjectEquirectangular perspective-
Palavras-chave: dc.subjectVR panoramas-
Palavras-chave: dc.subjectVirtual reality-
Palavras-chave: dc.subjectSocial networks-
Palavras-chave: dc.subjectRuler and compass-
Palavras-chave: dc.subjectDescriptive geometry-
Palavras-chave: dc.subjectSpherical perspective-
Palavras-chave: dc.subjectDrawing-
Título: dc.titleDrawing equirectangular VR panoramas with ruler, compass, and protractor-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Aberto - Universidade Aberta (Portugal)

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