G - Physics – 09 – B
Patent
G - Physics
09
B
354/4
G09B 9/08 (2006.01) G06T 15/50 (2006.01) G09B 9/30 (2006.01)
Patent
CA 1079853
ABSTRACT OF THE DISCLOSURE A night visual aircraft system for receiving flight data from an aircraft simulator, and terrain data from the gaming area data base, includes a computer which organizes this image data by frame in a buffer memory according to a particular format of addresses, sequences, and bit places The image data includes texture data for defining areas to be activated on the CRT such as runways, horizon glow, and faces of structures. An image processor receives the light source portion of the formatted image data to translate the data into the aircraft coordinate system, rotate the data in accordance with the attitude of the aircraft, and project the data in two-dimension display coordinates. A texture stage processes the texture portion of the data to activate face areas on the CRT display. Texture data includes X and Y trace rates which are integrated to provide X and Y deflection ramp voltages. The ramp voltages cause the electron beam to trace along the centerline of a face, and a deflection sinewave superimposed thereover fills out the area to be simulated. Trace limit data 1- provided to terminate the display when the trace ramps exceed a predetermined value. A range voltage ramp is generated from the Y deflection ramp and applied to the grid of the CRT to simulate range attenuation of intensity Initial width and taper width data is provided to simulate distance attenuation of size. Various compound signals may be applied to the deflection and intensity inputs to control the size, shape, shading, and perspective effect of the display.
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