Angle based stroke generator

Details Angle based stroke generator Angle based stroke generator

1982-07-01

1985-11-12

Krass, Errol A.

Boots, shoes, and leggings

340727, 340739, 364518, 382 46, G06F 1540, G06F 1520

Patent

active

045532141

ABSTRACT:
Stroke display apparatus generates symbols or characters on a display screen and permits dynamic rotation or translation of those characters without placing a computation burden on the host processor. The characters are represented as a series of connected line segments, or blank segments, each having a characteristic direction or vector angle. Each of the line segments are generated by successively adding incremental .DELTA.x and .DELTA.y steps to an x,y position until the desired length is achieved. The character is rotated by adding a predetermined offset angle to each characteristic vector angle and then by converting the rotated vector angle into incremental .DELTA.x and .DELTA.y steps. Character translation is accomplished by including an extra, typically blanked, line segment command before the character is drawn.

REFERENCES:
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patent: 3899662 (1975-08-01), Kreeger et al.
patent: 4027148 (1977-05-01), Rosenthal
patent: 4115863 (1978-09-01), Brown
patent: 4146925 (1979-03-01), Green et al.
patent: 4205309 (1980-05-01), Music
patent: 4228432 (1980-10-01), Osborne
patent: 4245321 (1981-01-01), Gennetten
patent: 4467412 (1984-08-01), Hoff

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