Multi-control point tool for computer drawing programs

Details Multi-control point tool for computer drawing programs Multi-control point tool for computer drawing programs

1991-12-30

1994-06-28

Oberley, Alvin E.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345145, G09G 302

Patent

active

053251105

ABSTRACT:
A method and apparatus for using and moving an tool, such as an eraser on a graphical display whose width can be changed. The invention provides a plurality of distinct areas on the tool that can be selected by a user input device, such as a stylus on an electronic tablet or a mouse. Selecting a first distinct area on the tool allows the user to move the tool without affecting the graphical images present on the display. Selecting the second distinct area on the tool allows the tool to modify the graphical image in a first manner (such as by providing a narrow line of erasure). Selecting a different distinct area on the tool allows it to modify the graphical image in a different manner (such as by providing a wider line of erasure). The orientation of the eraser can also be changed, simplifying several fine erasure applications.

REFERENCES:
patent: 4633436 (1986-12-01), Flurry
patent: 4656603 (1987-04-01), Dunn
patent: 4686522 (1987-08-01), Hernandez et al.
patent: 4823285 (1989-04-01), Blancato
patent: 4952932 (1990-08-01), Sugino et al.
patent: 4985152 (1991-01-01), Muller
patent: 5009603 (1991-04-01), Fong et al.
patent: 5055918 (1991-10-01), Berman

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