Coordinate data input system and method

Details Coordinate data input system and method Coordinate data input system and method

1996-10-22

1999-09-21

Zimmerman, Mark K.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

345145, 345156, 345162, 345157, G06T 1740

Patent

active

059560452

ABSTRACT:
A coordinate input system to which control data (a displacement value), concerning the location and the posture of a displayed graphic object, can be input with a conventional coordinate pointing device, such as a mouse, and a method therefor. Coordinate values of three sequential input points P.sub.n, P.sub.n+1 and P.sub.n+2, which are entered with a coordinate pointing device, such as a mouse, are employed to calculate the central angle .angle.P.sub.n O.sub.n P.sub.n+2 relative to the arc P.sub.n P.sub.n+1 P.sub.n+2 of the circle O.sub.n circumscribed about these three points. Then, the angle .angle.P.sub.n O.sub.n P.sub.n+2 is employed to acquire the central angle .angle..theta..sub.n for the arc P.sub.n P.sub.n+1. A logic circuit or an upper-level program that waits for the input of the dial rotation value as control data employs the central angle .angle..theta..sub.n, which is acquired by inputting the coordinate values of the two sequential points P.sub.n and P.sub.n+1, to rotate a graphic model around a designated axis on a screen in accordance with the angle .angle..theta..sub.n.

REFERENCES:
patent: 4754269 (1988-06-01), Kishi et al.
patent: 4887230 (1989-12-01), Noguchi et al.
patent: 5019809 (1991-05-01), Chen
patent: 5588097 (1996-12-01), Ono et al.
patent: 5588098 (1996-12-01), Chen et al.
patent: 5734377 (1998-03-01), Fukuzaki

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