Three dimension graphic generator for displays with hidden lines

Details Three dimension graphic generator for displays with hidden lines Three dimension graphic generator for displays with hidden lines

1978-06-02

1980-09-09

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340723, 340727, 340736, 340722, G06F 314

Patent

active

042220483

ABSTRACT:
The graphic generator includes a coding section which produces a series of data words which describe the input data to be displayed in terms of change of slope over time. Each data word contains enough information to describe one line on a display raster. The data is displayed as a three variable image, one variable being in the horizontal dimension of the raster, another variable being in the vertical dimension of the raster, the other variable being the intensity information of the display, which is superimposed on the vertical axis of the display through a summation of the vertical deflection circuit. The lines of the raster may be rotated with the superimposed intensity information being held constant as a reference, so that the view of the image appears to change, thus providing a three dimensional view of the image. On successive raster drawing cycles, as each line is drawn, the data word for that line is compared with the data word for the last previous line, and then further previous lines, on a bit by bit basis. If the data word bit for the line being drawn is the smaller, it is then blanked on the next drawing cycle to solve the hidden line problem.

REFERENCES:
patent: 3603963 (1971-09-01), Ward
patent: 3721855 (1973-03-01), Comley
patent: 3781785 (1973-12-01), Balch
patent: 3944997 (1976-03-01), Swallow
patent: 4016544 (1977-04-01), Morita et al.

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