JPS63310080A - Graphic plotting system - Google Patents

Abstract

PURPOSE:To replot an input graphic according to a desired plotting system when the input graphic is protruded from a display screen by plotting based on a scale decided according to a set plotting system and a plotting origin position. CONSTITUTION:When a defined graphic is plotted by protruding from the display screen and a fourth plotting system is instructed, a relative scale DELTAS is operated and the maximum and the minimum coordinate values of respective axis directions after the defined graph graphic is scaled by the relative scale DELTAS are obtained. Then, the coordinate value of the middle point of the maximum and the minimum coordinate values in the respective axis directions is operated and then, the relative quantities of shift DELTAh, DELTAv required for situating the middle point on the center Pc of the display screen CRT are obtained. Then, based on the obtained relative scale DELTAS and the relative quantities of the shift DELTAh, DELTAv, the scale and the plotting origin position are updated to plot on the display screen CRT.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a graphic drawing method, and particularly to a graphic drawing method for drawing a defined graphic on a display screen.

<Prior art> In automatic programming systems that create NC data using automatic programming languages such as APT and FAPT, (a) points, straight lines, and arcs are defined using simple symbols (shape definition); Define the part contour shape using the defined points, straight lines, and arcs (part shape definition), then the cutting start point, the cutting direction to cut along the part contour shape,
Define the tool path such as the cutting end point (movement power supply!l), create a part program in an automatic programming language, and (b) create a part program in an automatic programming language using the NC data output table. Converts to NC data in a format that can be executed (EIA code or 130 code).

<Problems to be solved by the invention> By the way, there are two ways to define a figure: (i) inputting data directly from the keyboard to define points, straight lines, and arcs (for example, a point is a point coordinate value, a straight line is a two-point (The circle is the center coordinate value and radius)
There is a method of drawing a defined figure on a display screen and then using the drawn figure to define another figure.The defined figure is drawn on the display screen.

Now, in order to define a figure according to the latter method, it is desirable that all the figures used for the definition be drawn on the display screen. However, in the conventional method, depending on how the drawing origin is set or the scale, the figure used for definition may not be able to be drawn completely within the display screen, and some figures may be drawn extending beyond the display screen, making it difficult to clearly define the shape. There was a problem that it was not possible to grasp the figure, and furthermore, it was not possible to easily define the figure.

Furthermore, not only in graphic definition but also in part contour shape definition, it would be inconvenient if the input graphic is not drawn. for example,
As shown in Figure 4, from point PS to straight line S, circle C4
When defining a shape that reaches point Pe by tracing , the following two methods can be considered. One is the starting point pS-p-cw (clockwise) - the ending point P.

This is a clockwise method, and the other is Starting point p, -p, ccw (counterclockwise) → Ending point P.

This is the way to go counterclockwise. However, as shown in Fig. 4, if a part of the circle C (the shaded area) is drawn outside the display screen, the second counterclockwise shape is drawn, but The first clockwise shape is not drawn and the shape cannot be clearly grasped, making it difficult to define the shape.

For this reason, the operator displays an interactive screen for changing the scale and drawing origin, and then shifts the drawing origin and changes the scale to draw the input figure on the display screen. You have to judge whether the figure is protruding, and you also have to display an dialog screen for changing the scale etc. to change the scale and drawing origin. The scale and shift amount must be determined, making the operation cumbersome.

From the above, an object of the present invention is to display the input figure by determining the scale and drawing origin position (drawing origin shift amount) using a desired drawing method among a plurality of drawing methods when the input figure protrudes from the display screen. The purpose is to provide a graphic drawing method that can be redrawn on the screen.

Another object of the present invention is that when an input figure protrudes from the display screen, the first drawing method can automatically determine the scale and shift amount and draw the figure within the display screen. The objective is to provide a drawing method.

Still another object of the present invention is to provide a figure drawing method that allows a second drawing method to relatively easily draw an input figure within the display screen by manual operation when the input figure protrudes from the display screen. It is to be.

Means to solve problems〉 FIG. 1 is a schematic explanatory diagram of the system of the present invention.

CRT is a display screen, and DDF is a defined graphic.

When the defined figure DDF is drawn outside the display screen CRT, the scale and drawing origin position (drawing origin shift amount) are determined according to a preset drawing method among multiple drawing methods, and the drawing origin position (drawing origin shift amount) is determined. The defined figure DDF is drawn on the display screen CRT based on the scale and the drawing origin position.

<Example> Fig. 1 is a schematic explanatory diagram of the method of the present invention, where CRT is the display screen, DDE is the defined figure (%), IP is the horizontal and vertical dimensions of the display screen, h and v are the horizontal and vertical dimensions of the defined figure. The dimension, Po, is the center of the display screen, and P,v, is the center of the defined figure.

FIG. 2 is a block diagram of a graphic display device in an automatic programming system that implements the present invention, where 1 is the main body side of the automatic programming system and 2 is the graphic display side. On the main body side of the automatic programming system, 11 is a main processor that performs automatic programming processing, 12 is a keyboard,
13 is a tablet. In the graphic display device 2, 21 is a display processor that performs graphic display processing, and 22 is R that stores image data sent from the main processor 11, a scale, a drawing origin, a parameter P that specifies a drawing method, etc.
AM, 23 is a video RAM that stores one screen worth of images to be drawn on a CRT.

24 is a timing signal generator that generates horizontal and vertical synchronizing signals, etc.; 25 is a reading circuit that reads and outputs images from the video RAM 23; 26 is a cathode ray tube (CRT);
7 is a deflection circuit that deflects the beam in horizontal and vertical directions.

FIG. 3 is a flowchart of the processing of the graphic display method according to the present invention. The present invention will be described below with reference to FIGS. 1 to 3. In addition, data specifying the drawing origin and scale have already been sent from the main processor 11, parameters indicating which drawing method should be used to determine the scale and drawing origin position and redrawing when the drawing extends beyond the display screen, and protrusion coefficients m and n. etc. on the graphic display side 2
It is assumed that the data is input to the RAM 22 and stored in the RAM 22.

However, the shape (defined shape) D defined when defining the shape
If the DF extends outside the display screen CRT, the defined figure is subsequently drawn using one of the following five drawing methods. In other words, (i) the drawing state is maintained as it is (the first drawing method), (ii) the scale and origin position data are always set each time one figure is defined, and the input scale and origin position are Redraw the input figure based on the input figure (in case there is no data input; the drawing state is maintained in the same way as the first drawing method)...Second drawing method, -Display screen CRT
Only when the data is drawn extending beyond the input figure, scale and origin position data are automatically set, and the input figure is redrawn based on the input scale and origin position (in addition, if no data is input, the first The drawing state is maintained in the same way as the drawing method)...Third drawing method, if the drawing extends beyond the Gψ display screen CRT, it automatically calculates the scale and origin position to prevent the drawing from extending beyond the Gψ display screen CRT. ...Fourth drawing method, (v) When drawing is done 1f beyond the display screen CRT and exceeds a predetermined protrusion coefficient, the scale and origin position are automatically set so that the drawing does not extend beyond the display screen CRT. There is a fifth drawing method that calculates and draws according to the actual drawing method.

When a graphic is defined using the keyboard 12 or tablet 13, the main processor 11 transfers the graphic data to the graphic display side 2. The display processor 21 stores the transferred graphic data in the RAM 22.
At the same time, an input figure is generated based on the scale and drawing origin position stored in RA and M22, stored in the video RAM 23, and drawn on the display screen CRT 26 (step 101).

Thereafter, the display processor 21 determines the maximum and minimum coordinate values in each axis direction (horizontal and vertical directions) of the defined figure, and then determines that the maximum and minimum coordinate values in each axis direction are all within the display screen. Check. That is, it is determined whether the defined figure is drawn on the display screen CRT (step 103).

If the defined figure is drawn on the display screen CRT, the display processor 21 checks which drawing method is specified by the parameter P stored in the RAM 22 (step 105), the first, third to fifth methods. If you have specified the second method, it will not be redrawn, and if you have specified the second method, a message will appear on the display screen saying, ``Enter the screen scale.''

A scale question such as "Scale=" is asked, and the operator inputs a predetermined scale (step 107). After that, "Input the origin of the screen" on the display screen (for example, H100V60).

A question about the origin position is asked, ``Origin-1'', and the operator is asked to input a predetermined origin position (step 109).

After that, the display processor 21 checks whether the scale and drawing origin have been input (step 111).
If both data are not input, no redrawing is performed, but if at least one of the data is input, redrawing is performed based on that data (step 113).

On the other hand, if the defined figure is read out and drawn on the display screen CRT in step 103, the display processor 21 checks which drawing method is specified by the parameter P stored in the RAM 22 (step 115). ), if the first drawing method is specified, no redrawing is performed, and if the second drawing method or the third drawing method is specified, the processing from step 107 onwards is performed.

On the other hand, if the drawing method is the fourth drawing method, the display processor 21 calculates the relative scale ΔS using the following formula. The right side of the above equation is the minimum value of H/h and V/v, and is the scale at which the defined figure can be drawn on the display screen by parallel movement. Once the relative scale ΔS is determined, the display processor 21 determines the maximum and minimum coordinate values in each axis direction after scaling the defined figure using the relative scale ΔS, and then calculates the midpoint of the maximum and minimum coordinate values in each axis direction. , and then set the midpoint to the center P of the display screen.
The relative shift amounts Δh and ΔV necessary to position the camera are calculated (step 117). Furthermore, the obtained relative scale Δ
The scale and the drawing origin position are updated based on S and the relative shift amounts Δh and ΔV and stored in the RAM 22.

Once the relative scale ΔS and relative shift amount are determined, the display processor 21 draws the figure scaled by ΔS on the display screen by translating the figure by Δh and ΔV relative to the drawing origin (step 113).

On the other hand, if the drawing method is the fifth drawing method in step 115, the display processor 21 checks whether one of the following equations (1) holds true (step 119).

Note that h is the axis component of the maximum coordinate value and minimum coordinate value in the horizontal direction (horizontal direction) of the defined figure, and ■ is the axis component of the maximum coordinate value and minimum coordinate value in the vertical direction (vertical direction). Also, m
is the maximum extrusion coefficient (dimension) in the horizontal direction, and n is the maximum extrusion coefficient (dimension) in the vertical direction. - If h≦H and V≦V, “NO” is returned in step 119, and redrawing is not performed. The reason why it is not redrawn even though it has protruded is that it takes time to draw, and that it becomes difficult to operate if the screen changes frequently.

However, if either equation (1) or equation (2) holds true, the amount of protrusion is large, so the process from step 117 onwards is performed to automatically calculate the scale and drawing origin and redraw.

When the redrawing process is completed as described above, it is checked whether the graphic definition has been completed (step 121), and if it has not been completed, the graphic definition from step 101 onwards is repeated.

<Effects of the Invention> According to the present invention, when an input figure is drawn extending beyond the display screen, the scale and drawing origin position are determined according to a predetermined drawing method among a plurality of drawing methods, and the scale and drawing origin position are Since the input figure is drawn based on the position, the figure can be drawn in any way you like.

In addition, if you select in advance a drawing method that automatically determines the scale and shift amount and draws on the display screen, if the input shape exceeds the display screen, the defined shape will be automatically drawn on the display screen. Can be drawn.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the method of the present invention, Fig. 2 is a block diagram of a graphic display device in an automatic programming system, Fig. 3 is a flowchart of the processing of the present invention, and Fig. 4 is a diagram illustrating drawbacks of the prior art. . CRT...Display screen, DDF...Drawing figure patent applicant Chiki Saito, Patent attorney, agent for FANUC Co., Ltd. - No. 1
Figure CRT --- Tone Array Screen DDE-Iichiodori 61D Month 5 Figure 4

Claims (1)

[Claims] When an input figure protrudes from the display screen, settings are made to determine which of a plurality of drawing methods should be used to draw the figure, and when drawing the input figure which protrudes from the display screen, A figure drawing method characterized by: determining a scale and a drawing origin position according to the set drawing method, and drawing an input figure on a display screen based on the scale and drawing origin position.