JPH04131973A - Graphic output device - 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] [Industrial Application Field] The present invention relates to a graphic output device in a document creation device such as a Japanese word processor, and particularly to a graphic output device that outputs drawn figures so that they appear three-dimensional. Regarding.

[Summary of the Invention] At the time of drawing a line segment, the graphic output device according to the present invention compares the drawing direction of the previously drawn line segment and the drawing direction of the currently drawn line segment, and determines whether they are in the same direction. By changing the output format, such as drawing solid lines if they are in the opposite direction, and drawing only points if they are in the opposite direction, the figure can be displayed and output three-dimensionally.

[Prior art] In document creation devices such as Japanese word processors,
Conventionally, it has become possible to draw and output figures in addition to documents.

Drawing of such a figure is performed, for example, by inputting the drawing start position and shape of the figure to be drawn using a pointing device such as a mouse.

At this time, there are also devices that allow the line segments that make up the figure to be drawn with a prespecified thickness (number of dots). For example, if you specify a width of 20 dots and operate the pointing device after specifying the drawing start position 100 as shown in the point locus in Fig. 8(a), a figure as shown in Fig. 8(b) will be drawn. Is displayed. Similarly, if you specify a width of 5 dots and operate the pointing device after specifying the drawing start position 100 as shown in the point locus in Fig. 9(a), a figure as shown in Fig. 9(b) will be drawn. and displayed.

[Problems to be Solved by the Invention] As described above, conventional graphic output devices only display lines on the screen, or even if they can draw something with a certain width, they simply display a graphic with the same width. It was only a matter of drawing.

Therefore, even if it is desired to display a three-dimensional figure, it has not been possible to draw and output the three-dimensional figure.

An object of the present invention is to output the drawn figure three-dimensionally when drawing a figure having a certain width.

[Means to solve the problem] The means of the present invention are as follows.

A line segment drawing means 1 (see the functional block diagram in FIG. 1, hereinafter) draws a line segment.

The output means 2 outputs, for example, a display of the line segment drawn by the line segment drawing means 1.

The detection means 3 detects the drawing direction each time the line segment drawing means 1 draws a line segment.

When the drawing direction detected by the detection means 3 is different from the previous drawing direction, the output form changing means 4 changes the output form of the line segment by the output means 2, for example, from a solid filled line segment to a point outline. Change to a line segment with only lines.

[Effect] The operation of the means of the invention is as follows.

When drawing a line segment by the line segment drawing means 1, the output form changing means 4 changes the output form of the line segment by the output means 2 if the drawing direction detected by the detection means 3 is different from the previous drawing direction. , for example, change from a solid filled line segment to a line segment consisting only of a dotted outline.

Therefore, the output form of the line segment changes each time the drawing direction of the line segment changes, so that the resulting figure is output so as to appear three-dimensional.

C Embodiment] An embodiment will be described below with reference to FIGS. 2 to 7(a) and (b).

FIG. 2 is a diagram showing the configuration of a document creation device to which the graphic output device of the embodiment is applied, and reference numeral 10 is a CPU that controls the entire system. 12 is a keyboard for inputting key codes and the like; 14 is an input buffer for storing codes input from the keyboard 12; 16 is CPU
This is a word processor control program memory that stores a word processor (word processor) control program executed in 10, and the code stored in the manual buffer 14 is processed by this word processor control program, and if it is a character code, it is stored in the document memory. 18. 20 is an external storage device such as a floppy disk for storing document data stored in the document memory 18, and 22 is a control section thereof. 24 is a display memory to which the contents of the document memory 18 are transferred for display; 26 is a display memory 24 to which the contents of the document memory 18 are transferred;
This is a display control unit that causes the display device 28 such as a CRT to display the contents. 30 is a printing device such as a printer, and 32 is a control unit thereof. Note that 34 is a system management memory used as a work memory.

Further, 36 is a pointing device such as a mouse for specifying a drawing start position and a drawing direction. Reference numeral 38 denotes a drawing management memory as a work memory for drawing figures, which includes a drawing pattern storage area 38a, a band width storage area 38b, a drawing direction storage area 38c, a previous drawing position storage area 38d, and a current drawing position storage area 38d. It has a drawing position storage area 38e and the like. A figure memory 40 stores drawn figures. In this case, the figure may be drawn on the figure memory 40 and its contents may be transferred to the display memory 24, or conversely, the figure may be drawn on the display memory 24 and displayed. The solid objects may be stored in the graphic memory 40.

The operation of the graphic output device configured as described above will be explained below with reference to the flowcharts shown in FIGS. 3(a) and 3(b).

That is, a drawing mode is entered in response to the operation of the drawing mode key 12a of the keyboard 12, and first, a pattern for drawing a band figure is selected (step Sl). This is done by displaying two types of patterns on the display device 28, as shown in FIG. 4, and selecting one of them using, for example, the up and down cursor keys 12b12C of the keyboard 12. If the pattern thus selected is pattern "a" (step S2), it is stored in the drawing pattern storage area 38a of the drawing management memory 38,
It is set that the display output form is changed when the drawing direction is switched to the vertical direction (step S3). In other words,
When the vertical direction of the drawing direction is reversed, the display appears to be switched from "front to back" or "back to front" as shown in FIG. Further, if the selected pattern is pattern "b" (step S2), it is stored in the drawing pattern storage area 38a of the drawing management memory 38,
It is set that the display output form is changed when the drawing direction is switched to the left/right direction (step S4). In other words,
When the horizontal direction of the drawing direction is reversed, the display changes from "front to back" or "back to front" as shown in FIG.

Once the pattern has been selected in this way, the band width is then set (step S5). For example, by operating the left cursor key 12d of the keyboard 12, an instruction is given to decrease the number of dots, and by operating the right cursor key 12e, an instruction is given to increase the number of dots. The number of dots specified in this way is stored in the drawing management memory 38.
is stored in the bandwidth storage area 38b. In this case,
The number of dots is specified within a predetermined range, such as 16 dots as the minimum number of dots and 64 dots as the maximum number of dots.

Once the pattern and width are determined, a drawing start position is set (step S6). That is, a drawing start position is input using the pointing device 36, and the input drawing start position is stored in the current drawing position storage area 38e of the drawing management memory 38.

Next, the drawing direction storage area 38 of the drawing management memory 38
After clearing the contents of c (step S7), the pattern stored in the drawing pattern storage area 38a of the drawing management memory 38, the band width stored in the band width storage area 38b, and the current drawing position storage area 38e The first two points to be drawn are determined based on the drawing start position stored in (step S8). For example, centering on the set drawing start position, if the set pattern is pattern "a", move horizontally, or if the set pattern is pattern "b".
In this case, two points at both ends are calculated in the vertical direction so that the set band width is achieved. Then, a line segment connecting these two points is drawn (step S9). For example, if the set pattern is pattern "a", as shown in FIG. Calculate the two points at both ends 51.52 so that
Including those two points 51 and 52, draw a dot between them.

After this drawing, the contents of the current drawing position storage area 38e of the drawing management memory 38 are shifted to the previous drawing position storage area 38d as the previous drawing position (step 510). And pointing device 36
In response to the operation, the next drawing position to be drawn is determined, this drawing position is stored in the current drawing position storage area 38e of the drawing management memory 38, and the next two points are calculated from the drawing position ( Step 511).

Here, the drawing direction is checked by comparing the contents of the current drawing position storage area 38e with the contents of the previous drawing position storage area 38d (step 512), and the drawing direction is stored in the drawing management memory 38. Area 38
c (step 813). In this case, the drawing direction may be specified and checked from the two points calculated in step s8 and the two points calculated in step Sll.

Next, as in step S9 above, a line segment connecting the two calculated points is drawn (step 514).

For example, as shown in FIG. 5(b), if two points 53°54 are calculated, the dots between them are drawn including those two points 5354.

After this drawing, the contents of the current drawing position storage area 38e of the drawing management memory 38 are shifted to the previous drawing position storage area 38d, as in step S10 above.
(Step 515). Then, in response to the operation of the pointing device 36, the next drawing position to be drawn is determined in the same manner as in step Sll, and this drawing position is stored in the current drawing position storage area 38e of the drawing management memory 38. , the next two points from that drawing position (Fig. 5(c)
(indicated by 55.56) (step 516)
. Next, as in step S12 above, the contents of the current drawing position storage area 38e and the previous drawing position storage area 3
The drawing direction is checked by comparing with the contents of 8d (step 517).

Here, by specifying the checked drawing direction and comparing it with the drawing direction stored in the drawing direction storage area 38c of the drawing management memory 38, it is determined whether the drawing direction has changed (step 518). In this case, the change in the drawing direction is determined based on the pattern stored in the drawing pattern storage area 38a of the drawing management memory 38.

In other words, if the set pattern is pattern "a", it is determined that the drawing direction has changed when the vertical direction of the drawing direction is switched, and it is determined that the drawing direction has not changed when the horizontal direction of the drawing direction is switched. . Further, if the set pattern is pattern "b", it is determined that the drawing direction has changed when the left-right direction of the drawing direction is switched, and it is determined that the drawing direction has not changed when the vertical direction of the drawing direction is switched.

If the drawing direction has not changed, drawing is performed in the same form as the previous drawing (step 519).

That is, as shown in FIG. 5(C), a line segment connecting two points at 55°56 is drawn. Then, if termination has not yet been instructed by the keyboard 12 or pointing device 36 (step 520), step S1
Return to step 5 and repeat the above process.

If it is determined in step 818 that the drawing direction has changed, drawing is performed this time in a form different from the previous drawing (step 521). In other words,
This time, only the two calculated points are drawn. That is, as shown in FIG. 5(d), only the calculated two points 57.58 are drawn, and the dots between them are not drawn.

Thereafter, by repeating steps S15 to S20 in the same manner as above, FIGS. 5(e) to (g)
), drawing in the upward direction is done using outline lines.

Therefore, if pattern "a" is specified as the drawing pattern and the pointing device 36 is operated to draw a trajectory as shown in FIG. 6(a), the display device 28 will display the pattern as shown in FIG. A figure is displayed and output on the screen.

Furthermore, if pattern "b" is specified as the drawing pattern and the pointing device 36 is operated to draw a trajectory as shown in FIG. 7(a), the display device 28 will display the pattern as shown in FIG. The figure is displayed and output on the screen.

Print output can also be implemented in the same way.

In this way, when drawing a band line, check whether the drawing direction is forward or reverse, draw two points as line segments depending on the result,
Alternatively, by simply drawing only two points, the figure can be displayed three-dimensionally.

[Effects of the Invention] According to the present invention, when drawing a figure with a certain width, the drawn figure can be output three-dimensionally.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a block configuration diagram of an embodiment of the present invention, and FIGS. 3(a) and (b) are a series of flowcharts for explaining the operation of the embodiment. ,
Figure 4 shows the drawing pattern selection screen, Figure 5 (a
) to (g) are diagrams each showing an example of a display for explaining a drawing operation, FIGS. 6(a) and 7(a) are diagrams each showing an operation trajectory of a pointing device,
b) and Fig. 7(b) are respectively Fig. 6(a) and Fig. 7(b).
Figures 8(a) and 9(a) are diagrams showing the operation trajectories of the pointing device, respectively. )
and FIG. 9(b) are respectively similar to FIG. 8(a) and FIG. 9(
It is a figure which shows the display output example of the conventional figure drawn corresponding to the locus|trajectory of a). 1... Line segment drawing means, 2... Output means, 3... Detection means, 4... Output form changing means.

Claims (1)

[Scope of Claims] Line segment drawing means for drawing a line segment; output means for outputting the line segment drawn by the line segment drawing means; It is characterized by comprising a detection means for detecting a direction, and an output form changing means for changing the output form of a line segment by the output means when the drawing direction detected by the detection means is different from the previous drawing direction. Graphic output device.