Graphics display system having data transform circuit

Details Graphics display system having data transform circuit Graphics display system having data transform circuit

1987-10-26

1989-05-02

Yusko, Donald J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 340731, 340747, G09G 116

Patent

active

048272507

ABSTRACT:
A graphics display system (10) includes a display screen (14) on which images are formed and a data transform circuit (12) that provides transformations between model data representing the basic shape of an object and display data that are employed in the formation of an image of the object on the display screen. The model data are transformed into display data in accordance with position data and orientation data that correspond, respectively, to a translation and a rotation of the image on the display screen. The data transform circuit communicates with a central processing unit (30) that controls the operation of the graphics display system. The data transform circuit includes data storage registers (34, 36, 38, 40, 42, 44, 46) that receive and hold the model, position, and orientation data. A multiplier circuit (68) and an adder circuit (112) calculate the transformation of the model data into display data. A data transform controller circuit (50) controls the transfer of data from the data storage registers to the multiplier and adder circuits so that the transformation takes place at a relatively high speed. The data transform circuit of this invention allows the transformation to proceed without delays such as those caused by the repetitive transfer of output data back to the inputs of an arithmetic logic unit.

REFERENCES:
patent: Re31200 (1983-04-01), Sukonick et al.
patent: 3723803 (1973-03-01), Harrison et al.
patent: 4384286 (1983-05-01), Di Toro
patent: 4590465 (1986-05-01), Fuchs
Antwick, "Microcomputers Displays, Graphics, and Animation", Prentice-Hall, 1985, p. 304.

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