JPS581237A - Display method of infinite distance for visual dispaly - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a computer-generated visual display system that displays the entire terrain up to infinity.

In computer-generated visual displays,
With the data stored in the computer, it is not possible to display all of the distant terrain due to resolution limitations due to the number of calculation bits. For this reason, conventionally, as shown in FIG. 1, a memory control circuit 2 for processing map data within the defined area and a memory control circuit 2'' for processing coarse map data outside the defined area,
Map data of two different scales read out in response to commands from the computer 1 are converted into separate coordinate conversion circuits 3' and 3''.
Converts the map into a light display image and simulates the map and distant terrain within the defined area.

In order to eliminate these drawbacks, the present invention provides a method that uses a common processing circuit for map data within a defined area and outside the defined area, and easily displays all terrain from the defined area to distant terrain.

A visual display display method according to an embodiment of the present invention involves defining a map to be displayed as a plurality of rectangular and triangular planes, and creating an image by coordinate transformation of the map data read out according to instructions from a computer. , and each plane is given a priority, and the overlapping part shows the plane with the higher priority, thereby approximately displaying the distant coastline. In other words, set a plane with a high altitude to fly at the edge of the land in the map defined area.

This plane is converted into an image by coordinate transformation using the same circuit as the map data of the defined area. On the other hand, a sky plane with a higher priority is placed over the top to create an image that simulates the entire topography up to the horizon.

FIG. 2 shows a system diagram according to an embodiment of the invention.

1 is a computer that shimmy-rates the motion of the airplane; 2 is a memory control circuit that reads data to be displayed from the map data stored in the memory in response to signals from the computer 1; 3 is the position and attitude of the airplane that are output from the computer 1. A coordinate conversion circuit uses angles to sequentially convert the data read by the memory control circuit 2 into a display image, and 4 calculates the horizontal line position on one screen using the attitude angle of the airplane output from the computer 1. a horizontal line calculation circuit 5, which generates all nine graphic creation signals based on the display image from the coordinate conversion circuit 3 and the data from the horizontal line calculation circuit 4; 6. 6',
6"... is a figure signal generation circuit that converts the figure generation signal for each figure generated by the figure generation signal generation circuit 5 into a figure signal for each scanning line of the TV, and 7 is a color memory address that decodes the priority of the figure signal. 8 is a display color data memory that outputs display color data from the color memory based on the color memory address signal. FIG. 3 is a system diagram of the memory control circuit 2 according to an embodiment of the present invention. 21 is a selection circuit for selecting a plane to be displayed based on the position of the airplane, and 22 is a control circuit.

Out-of-defined-area data memory 23 that stores a plane that simulates topography outside the defined area. Alternatively, it is a circuit that reads a selected plane from the defined area data memo IJ24 that stores planes that simulate topography within the defined area, and outputs map data.

As described above, according to the present invention, the coordinate conversion circuit for displaying the terrain within the map definition can be shared in order to display one terrain outside the map definition.

The ability to display terrain at an infinite distance can be realized at low cost.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a display method according to a conventional example, FIG. 2 is a system diagram of a display method according to an embodiment of the present invention, and FIG. 3 is a system diagram of a memory control circuit according to an embodiment of the present invention. 1: Computer, 2: Memory control circuit, 3: Coordinate conversion circuit,
4: Horizontal line calculation circuit, 5: Figure creation signal generation circuit,
6. 6', 6" two-figure signal generation circuit, 7: decoding circuit, 8: display color data memory, 21: selection circuit, 2
2: Control circuit, 23: Data memo in defined area, 24
: Data memory outside the defined area. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In computer-generated visual displays,
A map that displays the inside and outside of the defined area is defined by multiple rectangular and triangular planes, and the map data read out by a computer is converted to coordinates to create an image and to be displayed on nine planes. Priority
An infinity display method in a visual display characterized by displaying topography from a defined area to infinity by giving priority to displaying a high-priority plane in an overlapping part.