Graphic drawing apparatus for generating graphs of implicit func

Details Graphic drawing apparatus for generating graphs of implicit func Graphic drawing apparatus for generating graphs of implicit func

1995-03-14

1996-12-31

Jankus, Almis R.

395142, G06T 1100

Patent

active

055902553

ABSTRACT:
A graphic drawing apparatus divides an xy plane corresponding to a two-dimensional display region into plural display units. While one of two variables of the polynomial f(x, y) is fixed, a univeriate polynomial is generated. All intervals in which zeros are present are obtained within the width of the display units. By painting pixels of the display units that contain the intervals in which the obtained zeros are present, a graph f(x, y)=0 is precisely displayed. Even if the graphic to be displayed contains a singular point, the vicinity thereof can be precisely drawn.

REFERENCES:
patent: 4238826 (1980-12-01), Jones, Jr.
patent: 5251160 (1993-10-01), Rockwood et al.

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