Method and apparatus for searching line data in graphic data bas

Details Method and apparatus for searching line data in graphic data bas Method and apparatus for searching line data in graphic data bas

1993-02-19

1996-05-21

Jankus, Almis R.

395134, G06T 1500

Patent

active

055198171

ABSTRACT:
A method for searching line data to be transmitted to a terminal which demands an output map. The line data is obtained by selecting line segments within an output domain from the entire line data included in an object map read from a graphic file. The selection of the line segments is performed by obtaining the coordinates of intersections of lines specifying the output domain and line segment specified by any two adjacent characteristic points on a line associated with line data read out from the graphic file, and then by arranging the intersections and the characteristic points within the output domain sequentially along the line. This makes it possible to shorten the response time between a demand from the terminal and the actual output of the line data within the output domain to that terminal.

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Displays, Technology and Applications, vol. 8, No. 2, Apr. 1987, UK, pp. 87-97.
System Modelling and Optimization, Proceedings of the 15th IFIP Conference Zurich, Switzerland, Sep.2-6, 1991.
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Foley et al. "Computer Graphics Principles and Practice" pp. 110-117 (1990)

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