USING RECURSION TO DESCRIBE POLYGONAL SURFACES

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dc.contributor.authorWyvill, Brianeng
dc.contributor.authorLiblong, Breeneng
dc.contributor.authorHutchinson, Normaneng
dc.date.accessioned2008-02-27T22:45:19Z
dc.date.available2008-02-27T22:45:19Z
dc.date.computerscience1999-05-27eng
dc.date.issued1984-04-01eng
dc.description.abstractWe describe a three dimensional graphics system called PG (Polygon Groper) and its use by artists for defining and viewing solid objects. A simple set of commands in PG are used to manipulate 3D models. The models are stored as a hierarchy of objects, where each object represents a geometrical transformation of another object or a primitive polygon. It has been found that a hierarchical structure provides a more powerful way of building and manipulating 3D objects than conventional linear structures. The object hierarchy also allows recursion to be used to describe pictures which are difficult or impossible to define in other graphics systems without considerable programming effort. Although any recursive process may be expressed iteratively, a certain class of pictures is more concisely defined and more easily visualised recursively. Many tools are available to aid the artist manufacture primitive objects. These tools generate the surface polygons to describe different solids. PG offers a number of alternative viewing algorithms. These provide the artist with successively higher quality images at the cost of correspondingly greater time for computation. PG is an integral part of the Graphicsland System, a film animation system under development at the University of Calgary.eng
dc.description.notesWe are currently acquiring citations for the work deposited into this collection. We recognize the distribution rights of this item may have been assigned to another entity, other than the author(s) of the work.If you can provide the citation for this work or you think you own the distribution rights to this work please contact the Institutional Repository Administrator at digitize@ucalgary.caeng
dc.identifier.department1984-151-9eng
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/31251
dc.identifier.urihttp://hdl.handle.net/1880/46223
dc.language.isoEngeng
dc.publisher.corporateUniversity of Calgaryeng
dc.publisher.facultyScienceeng
dc.subjectComputer Scienceeng
dc.titleUSING RECURSION TO DESCRIBE POLYGONAL SURFACESeng
dc.typeunknown
thesis.degree.disciplineComputer Scienceeng
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