JPS582880A - Lattice point generator for graphic display - 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 graphic display grid point generating device for increasing the speed of a grid point display tube.

When displaying grid points on a graphic display, in current displays, a computer generates the coordinate position of each grid point and transfers it to the display device. For example, 1
If 0 XIO grid points are displayed, 100 orders and data transfer units are required, so the amount of data to be transferred to the display device will be large, and it will be difficult to display all the grid points. In a computer that must consume a long time, it is necessary to generate display orders for lattice points, so the computer load also increases.

The present invention solves the above-mentioned problem, and aims to be able to display grid points at high speed and reduce the computer load.To this end, the present invention provides a grid point generator on the display side. Only the necessary orders and data, such as how many vertically, how many horizontally, and how many pitches, are transferred from the one-point counter, and based on that data, the grid points are displayed on the display. The present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the configuration of a graphic display device, and FIG. 2 is an explanatory diagram of generation of a drawing signal. In the figure, Sl is a computer, 2 is an interface circuit, 3 is a microprocessor, 4 is a pattern generator, 5 is a memory, and 6
indicates the display, 7 indicates the Tuiteben, and 8Fi vector generator tube. Information from the computer 1 is sent to the microprocessor 2.
The data is decoded in the pattern generator 4 according to the seventh order, and the control 1 is performed. Pattern occurrence 1!4 is
In addition to Betator Generator II8, it has 1 character generator, 1 point generator, 1 yen generator, etc. The information output from the pattern generator 4 is written into the memory 5 as pixel data. The information is stored in the memory as a single figure, and is converted into a television signal by the video signal generation S (not shown). and will be released.

When displaying K t, xh Q lattice points, the computer 1 inputs the reference coordinate position (I#@1.y
・)1. Data on the number of grid points in the horizontal and vertical directions (4, 4) and the pitch of the grid points (Δ-0Δν) are transferred to the BE on the display side and stored as necessary grid point information. Of course, it goes without saying that the grid point display is also sent together. In response to this, on the display side B, as shown in FIG. , generates a drawing signal that is a horizontal line of dotted lines. The horizontal line O straight line of the vector generator 8 is from the starting point (-
・For a straight line given V- and the end point (S, V,), by changing y one after another in the entire vertical direction, and producing several parallel lines, we can form a horizontal line of dotted lines. Display the grid points by arranging them vertically in parallel. The algorithm for processing with the 74-t7 armware described above is as follows.

■ 4-0; First, make the initial settings.

(2) #1 is 1.+Δ# rate (tax): Find the end point from the starting point #0 based on the pitch Δ1 and the number of horizontal grid points.

■ (/ (<zy-ru% duck-sialga
ssd: In the judgment step, if 4 is smaller than ty, proceed to the next step.

■ y;

■・ Move to (jlse ys) without emitting the beam O ■ (*** ya) Sweep the beam tube with t,
Draw dotted lines with an interval of Δ1.

■ (=shi+1 ■ Return to ■.

As is clear from the above description, one aspect of the present invention is as follows.

Create a horizontal row of dotted lines of tl at intervals of Δ1 from the coordinate position of (1., W.), and then vertically shift the horizontal row of dotted lines by Δν to display the friend lattice points. , xtρ
If lattice point 1* is shown, the amount of transferred data Fi (1+α)
/ (tl+Ay)・・・・・・・・・(α≦2) is sufficient, and the time required for display is ty vector drawing time, so 1411 mu×h grid point tubes are drawn. It decreases more widely. Also, in the calculator.

Since (tax4) grid points can be displayed just by generating one order of magnitude, the computer time required is approximately 1/(7a×4), and the effect is extremely significant.

[Brief explanation of drawings]

FIG. 1 is an ivy diagram showing the configuration of a graphic display device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of generation of a drawing signal according to the present invention. 1... Computer, 2... Interface circuit, 3.
...Microphone processor, 4...Pattern generator, 5
...Memory, 6.Display, 7.Light pen, 8.Vector generator, 9.Beam control signal generator. lO...AND means. . Patent applicant: Fujitsu Kinsha Ltd. Representative patent attorney: Yobe Kyotani

Claims (1)

[Claims] In a grid point generator for a graphic display that receives grid point information and displays grid points on a graphic display, the grid point information includes the reference coordinate position (ll., W.), horizontal direction and vertical direction. The number of grid points (t
. a vector generating means for sequentially generating a plurality of linear signals along the coordinate axes given a starting point and an ending point; and a logic φ stage for generating logical horizontal 1 and 9 drawing signals of the pulse and the linear signal. A graphic display lattice point generator featuring particular features.