JPH07296181A - Graphic plotting method - Google Patents

Abstract

PURPOSE:To plot a line segment while confirming how long distance is corresponding to the length of the line segment plotted to a graphic prepared in advance when the line segment is plotted. CONSTITUTION:While referring to a basic graphic memory 2-2 and a scale memory, a CPU 1 executes the guiding display of a scale graphic to be the index of line segment plotting and the guiding display of a reference distance showing its size. When any arbitrary line segment is plotted, the CPU 1 calculates the dot length of the plotted line segment, calculates a ratio between this dot length and the dot length of the scale graphic, calculates the distance of the line segment from this ratio and the reference distance and displays it on a window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic drawing method most suitable for drawing a map or the like in a personal computer or word processor having a graphic processing function.

[0002]

2. Description of the Related Art Conventionally, when a map is created by using a drawing function of a word processor, the positional relationship of features and the length of a road are sensibly determined in consideration of a scale, and a schematic map is created. I was trying to draw.

[0003]

By the way, in order to express the details of the map with a certain accuracy without breaking the correlation, it is necessary to strictly specify the positional relationship of the features and the length of the road according to the scale. However, in the past, it was not possible to specify it accurately, and it was extremely difficult to create an accurate map. An object of the present invention is that when a line segment is drawn, the line segment can be drawn while confirming what distance the length of the drawn line segment corresponds to the scale figure prepared in advance. To do so.

[0004]

Means for Solving the Problem and Its Action The means of the present invention and its action are as follows. The scale figure which is the index of the line segment drawing is displayed as a guide, and the length of this scale figure is used as the reference distance for the guide display. When the line segment is drawn, the length of the drawn line segment is calculated. The ratio between the length of the line segment and the length of the scale figure is obtained, and the value obtained from this ratio and the reference distance is displayed as a guide line segment distance. Repeat. The scale figure may be changed to the instructed length when the length change is displayed for the scale figure stored in advance as the basic figure. Further, a reference distance indicating the length of the scale figure may be arbitrarily input. Therefore, when the line segment is drawn, it is possible to draw the line segment while confirming the distance to which the length of the line segment drawn for the scale graphic prepared in advance corresponds.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. FIG. 1 is a block diagram of a word processor having a drawing function. The CPU 1 is a central processing unit that controls the overall operation of the word processor according to various programs in the ROM 2, and when the document data is input from the key input unit 3, the input document data is fetched and a video RAM (VRAM) is input. 4, the display controller 5 is operated to display and output the data from the display unit 6, and the data is stored in the document memory 7-1 in the RAM 7.

The ROM 2 is a fixed memory having a program memory 2-1, a basic figure memory 2-2, etc., and in the basic figure memory 2-2, as shown in FIG. The figure is stored, and the dot length indicating the total length of the two types of scale figures is indicated by the dot size on the display screen. In addition, the scale figure has a configuration in which indexes (vertical lines) are attached to both ends of the horizontal line, and the scale figures have indexes (vertical lines) attached to both ends of the horizontal line, and the scales are divided into five equal parts (vertical lines). ) Is attached. In addition, in the basic figure memory 2-2, various figures, for example,
It stores symbolic figures and the like that represent features according to a diagram for map creation.

The RAM 7 comprises a document memory 7-1, a graphic memory 7-2, a scale memory 7-3, a line drawing register 7-4, etc., and the graphic memory 7-2 is a memory for storing input and created graphic information. Further, the scale memory 7-3 is a memory for creating a map and has a structure as shown in FIG. Here, the figure type flag area is the basic figure memory 2-
This is an area in which a flag indicating a scale figure arbitrarily selected by the user among the scale figures in 2 is stored.
The total dot length area is an area for storing a dot length indicating the entire length of the scale graphic, and the basic dot length set in the basic graphic memory 2-2 is stored as an initial value thereof. When the length of the scale graphic is arbitrarily changed by the user, the changed dot length is stored. The input reference value area is an area for storing a reference distance that indicates how much the scale figure length (dot length) corresponds to on the ground, and the unit area is a unit (m or m) for the reference distance. Km) is stored in this area. The line drawing register 7-4 is a register for temporarily storing the starting point coordinates and the ending point coordinates when drawing a line segment.
When the line segment drawing is finalized, its contents are stored in the graphic memory 7-2 as graphic information.

The operation of this embodiment will be described below with reference to the flow charts shown in FIGS. FIG. 4 is a flowchart showing a map drawing process which is started when the map key K on the key input unit 3 is operated. First,
When the map key is operated, the CPU 1 causes the basic figure memory 2
, A scale figure in -2 is displayed as a menu (step A1), and an arbitrary scale figure is input from the key input unit 3.
It waits until is selected and designated (step A2). Here, when the user designates an arbitrary scale figure, the designated scale figure is drawn in the guidance display area on the display screen, and the basic dot length and figure type flag are stored in the scale memory 7-3. Put (Step A
3).

In this state, the user confirms the scale figure, and when changing the length, the user gives an instruction to change the length of the scale figure according to a predetermined key operation. Then, the fact is detected in step A4, and the process proceeds to step A5, and the changed new scale figure is drawn in the guidance display area, and the total dot length is calculated and stored in the scale memory 7-3. , Change its dot length. In this case, to change the length of the scale figure, move the cursor to the start point or end point of the scale figure and move the cursor from that position to any position on the extension line of the scale figure. It will be relatively elongated without breaking.

Next, a standby state is entered until a reference value indicating the distance on the ground corresponding to the length of the scale figure and its unit are input and designated (step A6). Here, when the reference value and the unit thereof are input and designated, the input reference value and the unit are additionally displayed on the scale graphic and stored in the scale memory 7-3 (step A7). That is, in the case of the scale figure with scale shown in FIG. 6, the input reference value and the unit (in this case, 5 km) are additionally displayed corresponding to the end point position (the right end position in the figure), and the scale figure shown in FIG. In the case of, the input reference value and the unit are additionally displayed corresponding to the intermediate position. And the scale memory 7-
By referring to the figure type flag in 3, it is checked whether the designated scale figure has a scale (scale figure) (step A8). Here, in the case of a scale figure with a scale, the input reference value is divided into 5 to obtain a scale value corresponding to each scale, and the scale value is additionally displayed corresponding to each scale in the scale figure (Fig. 6).

After the desired arbitrary scale figure is displayed and output in this manner, the map is created. here,
When creating a map, the graphic type (circle, rectangle, line drawing, symbolized graphic according to the diagram, etc.) is specified for each element. At step A10, it is checked whether or not a line drawing is designated as a figure type. If a line drawing is designated, a line drawing process described later (step A11) is performed. If another figure type is designated, A process (step A12) corresponding to the designated graphic type is performed. Such a map creating process (steps A10 to A12) is repeated until an end key (not shown) is operated (step A1).
3). When the end key is operated, the scale figure is cleared (step A14) and the contents of the scale memory 7-3 are cleared (step A15).

Next, the line drawing process (step A11) will be described with reference to FIG.
It will be described according to the flowchart shown in FIG. First, move the cursor to the starting point of the line segment to be drawn, and
U1 fetches the starting point coordinate position and sets it in the line drawing register 7-4 in the RAM 7 (step B1). In this state, it is checked whether or not the cursor pointer has moved (step B2). When the movement of the cursor pointer is detected, the position is set as the end point coordinate position in the line drawing register 7-4 (step B3). . And C
PU1 fetches the starting point coordinate position and the ending point coordinate position from the line drawing register 7-4, and draws a dotted line connecting these two points (step B4). The dotted line display between the start point and the end point in FIGS. 6 and 7 shows the state in this case. And this starting point,
Calculate the length between the end points (dot length) (step B5),
The distance of the line segment is calculated from the calculated dot length, the total dot length of the scale graphic set in the scale memory 7-3, and the input reference value (step B6). That is, the ratio of the line segment dot length to the total dot length of the scale figure is obtained, and the line segment distance is calculated by multiplying this ratio by the input reference value. Now, assuming that the ratio is 9/25, the line segment distance is 1.8K if the input reference value is 5Km.
m. The distance thus obtained is displayed in a window together with the unit in the scale memory 7-3 (step B7). FIG. 6 shows an example of window display in this case.

Then, the process returns to step B2, and thereafter, each time the cursor pointer is moved, the above steps B3 to B7 are performed.
Is repeated. Therefore, the distance of the line segment displayed in the window is visually confirmed, and the cursor pointer is moved until the desired distance is displayed to increase or decrease the length of the line segment for adjustment. If the line segment confirmation operation is performed at the stage where the desired distance is displayed, step B
This is detected in step 8 and the process proceeds to step B9, where the space between the line drawing register 7-4 and the end point coordinate is replaced with a solid line drawing. And the line drawing register 7-4
Figure memory 7 with the start point coordinates and end point coordinates in
-2 (step B10) and clear the window display (step B11).

As described above, in the present embodiment, when a line drawing is drawn by designating two start and end positions of the line segment, the distance between the line segment and the scale figure is updated every time the end position is updated. Is displayed as a guide, the length of the line segment can be adjusted while checking the distance display. Therefore, when creating a map, the positional relationship of features, the length of a road, and the like can be specified exactly according to the scale, and an accurate map can be created.

In the above embodiment, the road (line segment) on the map is used.
Although the case where is a horizontal line or a vertical line is taken as an example, the hypotenuse of a right triangle may be calculated from two-point coordinates according to the Pythagorean theorem. Further, in the above embodiment, the case where the road is drawn on the map is taken as an example.
For example, when measuring the distance between the leftovers and the leftovers, the distance between the line segments may be displayed in a window while drawing the line segment by the dotted line display. In this case, the line segment may not be stored in the graphic memory 7-2 as line drawing information, and the dotted line display may be erased after the distance measurement is completed. In addition, although the above-mentioned embodiment has exemplified the case where a map is created, it is needless to say that it can be applied to, for example, a floor plan of the room, and the unit is "m", "cm", Good.

[0016]

According to the present invention, when a line segment is drawn, the length of the line segment drawn with respect to a scale figure prepared in advance is checked while confirming the distance. Since line segments can be drawn, for example, when creating a map, it is possible to specify the positional relationship of features and the length of roads strictly according to the scale, which is extremely effective for creating accurate maps. It will be

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a word processor with a drawing function according to an embodiment.

FIG. 2 is a diagram showing scale figures and the like stored in a basic figure memory 2-2 of a ROM 2.

FIG. 3 is a diagram showing a configuration of a scale memory 7-3.

FIG. 4 is a flowchart showing an operation that is started in response to an operation of a map key.

FIG. 5 is a flowchart showing in detail step A11 (line drawing processing) in FIG.

FIG. 6 is a display state diagram when a map is drawn according to a scale figure.

FIG. 7 is a display state diagram when a map is drawn according to another scale figure.

[Explanation of symbols]

 1 CPU 2 ROM 2-1 Program memory 2-2 Basic figure memory 3 Key input section 4 Video RAM 5 Display control section 6 Display section 7 RAM 7-2 Figure memory 7-3 Scale memory 7-4 Line drawing register

Claims (3)

[Claims] 1. A scale figure, which is an index for drawing a line segment, is displayed as a guide, and the length of the scale figure is displayed as a reference distance. When the line segment is drawn, the length of the drawn line segment is displayed. Then, the ratio between the length of this line segment and the length of the scale figure is calculated, and the value obtained from this ratio and the reference distance is displayed as a guide line segment distance. A graphic drawing method characterized in that it is repeated every time a is drawn. 2. The scale figure is changed to the instructed length when the length change is displayed for the scale figure stored in advance as the basic figure. (1) The graphic drawing method described above. 3. The figure drawing method according to claim 1, wherein a reference distance indicating the length of the scale figure is arbitrarily input.