Polygon shading on vector type devices
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Authors
Scheepers, C.F.
Issue Date
1987
Type
Article
Language
en
Keywords
Computer graphics , shading , filling , monotone polygons , cartography , map-making
Alternative Title
Abstract
A method is presented whereby the interior of boundary-defined regions on vector type devices may be shaded
using regular line, cross-hatch and dot patterns. Different shades are realized by changing shading parameters such
as line width, distance between consecutive lines or dots, and orientation of patterns.
The algorithm partitions any polygon (not necessarily convex), into mutually exclusive, pseudo-monotone
polygons that can then be shaded independently using a fast procedure. The partitioning process is based on the
topology of the polygon, and notions such as type-1 and type-2 critical points are introduced.
Shading is frequently used in computer graphics applications, such as cartography, engineering graphics, art,
animation and hidden-line removal.
Description
Citation
C.F. Scheepers (1987) Polygon shading on vector type devices. Quaestiones Informaticae Vol 5 No 2 1987
Publisher
Computer Society of South Africa (on behalf of SAICSIT)
License
Journal
Volume
Issue
PubMed ID
DOI
ISSN
0254-2757