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A scan line algorithm for rendering curved tubular objects
Description
Parametric surfaces and implicit surfaces are generally used for representing curved surfaces in CAD/CG Systems. This paper discusses a curved tubular object which is a surface swept by a sphere/circle moving along a curve. For the trajectory curve, a 3D Bezier curve is employed, and its radius can be varied along the curve. In general, its surface cannot be defined by a closed form, while a high degree of polynomial must be solved for ray/surface intersection. This paper proposes an effective rendering method which uses a scan line algorithm for detecting curved tubular objects on the projection plane. The calculation of the distance from a point to a curve plays an important role in our algorithm. Bezier Clipping Method is employed for this calculation.
Journal
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- Proceedings. Seventh Pacific Conference on Computer Graphics and Applications (Cat. No.PR00293)
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Proceedings. Seventh Pacific Conference on Computer Graphics and Applications (Cat. No.PR00293) 92-101,, 2003-01-20
IEEE Comput. Soc