Computer generated hatch filling within a vector graphic

Details Computer generated hatch filling within a vector graphic Computer generated hatch filling within a vector graphic

1995-10-02

1998-04-14

Jankus, Almis H.

Computer graphics processing and selective visual display system

Computer graphics processing

Shape generating

345429, 345467, G06T 1140

Patent

active

057398259

ABSTRACT:
In a computer system, a method and an apparatus for generating hatch fills within a contour of a vector graphic. The method of the present invention includes the steps of reading vector graphic data defining a contour of a vector graphic, creating a series of intersection lines overlaying the vector graphic, defining intersection points that indicate where the intersection lines intersect the contour of the vector graphic, and wherein the intersection points create an array having a row corresponding to each intersection line, connecting with connection lines the intersection points of each row, and verifying that each of the connection lines are contained within the contour of the vector graphic, and removing portions of any connection lines not contained within the contour of the vector graphic.

REFERENCES:
patent: 5386510 (1995-01-01), Jacobs
patent: 5500924 (1996-03-01), DeSilva et al.
patent: 5619633 (1997-04-01), Turner
Macromedia Freehand User Manual, Version 5.0, Chapter 4, 1994.
Real World Freehand, Olav Martin Kvern, 1991, pp. 115-122.
Kvern, Olav Martin. "Real World FreeHand 3," PeachPit Press, Inc., Berkeley, 1991, entire article, pp. 400-401, 421.

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