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Scanline Methods for Solid Modelling


Reference:

Patel, M., 1986. Scanline Methods for Solid Modelling. Thesis (Masters). University of Manchester.

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Abstract

The modelling of solid objects is becoming increasingly important in the application of computer graphics to a wide variety of problems, such as CAD/CAM, simulation,and molecular modelling. A variety of methods for rendering solid objects exists, including Z-Buffer, Scanline and Ray Tracing. This paper is concerned with a scanline method for the production ofstill images of complex objects. The implementation of a scanline algorithm is discussed, in conjunction with a consideration of performance in relation to other methods. Many scanline methods cater only for a restricted class of primitives, such as polygons or spheres. This investigation has resulted in the development of a general purpose scanline algorithm capable of being extended to handle a variety of primitives. The primitives currently available are polygons, spheres, spheres swept along straight-line trajectories, and cylinders, with polygonal models of cubes, cones and cylinders. Additionally, the approach is capable of dealing with ``positive'' and``negative'' volumes, allowing objects with holes to be modelled and displayed. It has further been extended to cater for the inclusion of transparent objects into a scene, and consequently allows the modelling of coloured "glass'' objects.

Details

Item Type Thesis (Masters)
CreatorsPatel, M.
Uncontrolled Keywordsscanline method, solid modelling, computer graphics, computer rendering, computer aided design, transparency
Research CentresUKOLN
StatusPublished
ID Code30533

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