Process and device for graphically drawing point by point a clos

Details Process and device for graphically drawing point by point a clos Process and device for graphically drawing point by point a clos

1988-03-16

1993-01-26

Herndon, H. A.

G06F 1520

Patent

active

051827956

ABSTRACT:
A device including a screen memory (53) for storing the data relating to the points of a screen on which the curve is to be drawn. A point processor (21) modifies the data stored in the screen memory (53) at the positions of said screen memory corresponding to the points of the curve to be drawn. An address processor (20) adapted to control the access to the screen memory (53), the operation of the processor (21) and the transfers of data between the point processor (21) and the screen memory (53) so as to ensure the modification of its content as a function of the line to be drawn. A CROM memory (22) containing instructions relating to the changing of the reference of U, V relative coordinates of each octant change and instructions relating to the point by point drawings of portions of curves contained in each of the octants covered by the arc of a curve to be drawn.

REFERENCES:
patent: 4674059 (1987-06-01), Schrieber
patent: 4680578 (1987-07-01), Hornig et al.

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