Title: Improved quadratic normal vector interpolation for realistic shading
Authors: Lee, YC
Jen, CW
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
Keywords: shading;quadratic interpolation;perspective correction
Issue Date: 2001
Abstract: Interpolation for normal vectors is an important stage of Phong shading. Linear interpolation cannot represent the geometry of surfaces adequately in some situations. Previous quadratic interpolation for normal vectors generates visual artifacts for arch-type curves and triangle scan conversion. To eliminate those artifacts, we propose an improved quadratic interpolation for normal vectors with little computational overhead. Perspective-correct version for obtaining perspective foreshortening is also presented.
URI: http://hdl.handle.net/11536/29970
http://dx.doi.org/10.1007/s003710100111
ISSN: 0178-2789
DOI: 10.1007/s003710100111
Journal: VISUAL COMPUTER
Volume: 17
Issue: 6
Begin Page: 337
End Page: 352
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