JPH06295322A - Line segment display device and method - Google Patents

Abstract

PURPOSE:To specify a center line even when an optional position of the line is locally displayed on a display. CONSTITUTION:In the case of displaying the center part of the center line locally on the display, the line can be specified by displaying numerals or alphabetical characters on the end part of the line correspondingly to the line on the end of display (view area). Even when the numerals or alphabetical characters displayed on the end part of the center line are reduced and can not be easily observed because of the reduced display of the line itself, numerals or characters corresponding to size to be easily observed can be displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line segment display apparatus and method suitable for use in, for example, creating a drawing for building a building.

[0002]

2. Description of the Related Art When drawing a drawing for building a building in a CAD system, it is necessary to create a core line indicating the reference position of the center of the wall and to attach a symbol to each core line to identify it. There is. FIG. 11 shows an example thereof.

In FIG. 11, three cores are vertically shown by a chain line, and in the figure, numbers 1 to 3 are attached to the lower end as symbols for identifying each core. Has been done. This number is displayed in a circular figure (balloon).

Further, in this example, the horizontal direction is 3
A book core is created, a balloon is added to the left end portion thereof, and alphabet letters A to C are displayed therein as symbols for identifying the respective cores.

[0005]

[Problems to be Solved by the Invention]
It can be enlarged or reduced on a display device such as RT or LCD, that is, can be displayed on a predetermined scale. FIG. 12 shows an example in which a plurality of cores are reduced and displayed. In addition, in FIG. 13, the core is enlarged,
The example which displayed the one part is shown.

As shown in FIG. 12, when a large number of cores are reduced and displayed on a display device having a predetermined display range,
The symbol for specifying each core is also reduced. As a result, there is a problem that it is difficult to recognize (read) the symbol for specifying the core.

Further, as shown in FIG. 13, when the line core is displayed only in a predetermined range, the symbol for identifying each line core is displayed only at the end of the line core, so the symbol is displayed. There is a problem that it is located outside the range, and it becomes difficult to identify the displayed core.

The present invention has been made in view of such a situation, and it is possible to easily recognize the corresponding symbol even when the grid line is scaled and displayed, or when a part thereof is displayed. It enables you to.

[0009]

A line segment display device according to a first aspect of the present invention is a hard disk device as a storage means for storing a line segment such as a core and a numeral or an alphabet character as a symbol corresponding to the core. 2, the RAM 13, the hard disk device 2, the display 5 as a display means for displaying the core and the numbers and alphabet characters stored in the RAM 13, and the display position of the numbers and alphabet characters is outside the display range of the display 5. , A CPU 11 as a display control means for displaying numbers and alphabetic characters near the center line within the display range of the display 5.
And is provided.

A line segment display device according to a second aspect of the present invention is a hard disk device 2, a RAM 13, and a hard disk as a storage means for storing a line segment such as a line core and numbers and alphabetic characters as symbols corresponding to the line core. Device 2,
A display 5 as a display means for displaying a core and numbers and alphabetic characters stored in the RAM 13.
And display control for displaying numbers or alphabet characters near the core with a size that can be easily recognized when the size of the numbers or alphabet characters displayed on the display 5 becomes smaller than a predetermined size. It is characterized by comprising a CPU 11 as means.

In these line segment display devices, line segments and symbols for storage are stored in the hard disk device 2 as the first storage means, and line segments and symbols in the range displayed on the display 5 are stored in the second storage. It is possible to store in the RAM 13 as a means, and to store the numbers and alphabetic characters displayed near the center line only in the RAM 13.

According to a fourth aspect of the present invention, a line segment display method stores a line segment such as a core and a numeral or an alphabet character as a symbol corresponding to the core, and the stored core and the number or the alphabet character are stored. Among them, the one in a predetermined range is read out and displayed in a predetermined display range, and when the display position of the number or alphabetic character is outside the display range, the number or alphabetic character is displayed near the center line of the display range. It is characterized by

According to a fifth aspect of the present invention, a line segment display method stores a line segment such as a core and a numeral or an alphabet character as a symbol corresponding to the core, and the stored core, the number or the alphabet character is stored. Of the specified range, the ones within the specified range are read out and displayed, and when the displayed numbers or alphabetic characters are smaller than the specified size, the numbers or alphabetic characters are displayed in a size that can be easily recognized. It is characterized in that it is displayed near the base line.

In these line segment display methods, a line core, numbers and alphabetic characters are used for storage,
It is possible to store the numbers and alphabet characters displayed in the vicinity of the line segment independently of those for displaying, and to store only the numbers or alphabetical characters for displaying.

[0015]

A line segment display device according to claim 1 and claim 4.
In the line segment display method described in (1), when the display position of the number or alphabetic character is outside the predetermined display range, the number or alphabetic character is displayed near the line segment within the display range. Therefore, it is possible to reliably identify the displayed grid regardless of the display position of the grid.

In the line segment display device according to the second aspect and the line segment display method according to the fifth aspect, when the size of the displayed numbers or alphabetic characters becomes smaller than a predetermined size, it is easy. The numbers and alphabetic characters are displayed near the line segment in a size that can be recognized by. Therefore, it is possible to always reliably identify the grid line regardless of the scaling of the grid line.

Further, the data for storage and the data for display are stored independently, and the numbers and alphabetical characters displayed near the core are stored only as data for display, so that the display position In spite of this, rapid processing is possible.

[0018]

1 is a block diagram showing the construction of an embodiment of a line segment display device of the present invention. The processing unit 1 includes a ROM 12 in which predetermined programs and data for CAD operation are stored in advance, and a CPU 11 which performs predetermined calculations in accordance with the programs and data stored in the ROM 12.
And a RAM 1 for storing predetermined data as necessary
3 and an interface 14 having an interface function with an external device.

The hard disk device 2 stores data such as created drawing data for construction. The keyboard 3 and the mouse 4 are connected to the C via the interface 14.
A predetermined command can be input to the PU 11. Also, display 5 and plotter 6
The CPU 11 outputs predetermined data via the interface 14.

Next, the first operation of this line segment display device will be described. The hard disk device 2 stores the data of the already created drawings as a database. When a predetermined command is input to the CPU 11 via the interface 14 by operating the keyboard 3 or the mouse 4, the CPU 11 accesses the hard disk device 2 via the interface 14,
The drawing data stored there is read out and RAM
It is supplied to a predetermined address of 13 and stored.

Then, the CPU 11 reads out the data in the range (view area) to be displayed from the data in the predetermined area (drawing area) stored in the RAM 13, and reads it out.
It is stored in another predetermined range (display segment) of the AM 13 (the drawing area and the view area will be described later with reference to FIG. 5). The CPU 11 further reads the data stored in this display segment, and displays a line segment corresponding to this data and an image corresponding to a numeral and an alphabet character as a symbol for identifying the line segment.
Output to and display.

When the CPU 11 is instructed to change the display position by operating the keyboard 3 or the mouse 4,
The CPU 11 changes the range of the view area in the drawing area in response to the command, transfers the data of the new view area to the display segment, and stores it. Then, the image corresponding to the data stored in the display segment is displayed on the display 5
Output to and display. In this way, it is possible to display an image in an arbitrary designated range on the display 5.

As will be described in detail later, a balloon is provided at the end of the core, and a number or alphabetic character for identifying the core is displayed therein (FIG. 6).
When the display position (display range) of the grid line is changed, the balloon may be located outside the view area. CPU11
At this time, the number or alphabetic character displayed in the balloon is copied to a predetermined position in the display segment (in the vicinity of the center line in the view area). The data in this display segment is read out and output and displayed on the display 5. As a result, even if the end of the core (the display position of the balloon) is outside the range of the view area, the core located in the view area can be specified.

Next, the second operation of this line segment display device will be described. Similar to the first operation, the data corresponding to the drawing area stored in the hard disk device 2 is read out and stored in the RAM 13. Then, the data in the view area is transferred to and stored in the display segment. When the keyboard 3 or the mouse 4 is operated to instruct the display 5 to widen or narrow the display range, the CPU 11 scales (enlarges or reduces) the data stored in the display segment. The image corresponding to the data is displayed on the display 5. As a result, the display 5 displays the wick and balloons (numbers or alphabetic characters inside thereof) at a predetermined scale and within a predetermined range (of course, when the balloons are located outside the view area, the balloons are not displayed. , At this time, as described above, the symbol is displayed near the core.

When the size of a number or alphabetic character (the size of a balloon) becomes smaller than a predetermined size set in advance, the CPU 11 has a size that allows the number or alphabetic character to be easily recognized. , Copy to a predetermined position in the display segment. The copy position is set to a predetermined position in the vicinity of the view area of the corresponding base line (for example, in the vicinity of the balloon as shown in FIG. 10). Since this data is read and displayed on the display 5, the display 5 retains the balloons and the numbers and alphabetic characters inside the balloons. It is displayed near the line core.

Next, the third operation of the line segment display device will be described. As described in the first or second operation, the image data stored as the database is stored in the hard disk device 2. On the other hand, the image data displayed on the display 5 is stored in the display segment of the RAM 13. That is, display 5
Even if the scale displayed on the screen is expanded or contracted, the data in the display segment is changed to the corresponding data and is stored in the drawing area data of the RAM 13, that is, the hard disk device 2. The data is unchanged.

Similarly, when the display position of the balloon is outside the range of the view area, or when the balloon, number, alphabetic character, etc. are smaller than a predetermined size, the corresponding numeral or alphabetic character is segmented. When displayed in the vicinity of, these numbers, alphabetic characters, etc. are copied only in the display segment, and R
It is not stored as data in the drawing area of the AM 13 or data in the hard disk device 2. This is because these displays are provided for convenience only for the purpose of display, and do not need to be stored as the data of the original drawing. That is, the reason why the numbers and alphabetic characters are displayed near the grid line outside the view area is to identify the grid line that is being displayed at that time, and it is not necessary to write the symbol there. In this way, by storing only the display segment, even when changing the display position (display range), it is possible to quickly display the changed grid line (when stored in the database , Each time you make changes, you must erase that data).

Next, an embodiment of the line segment display method of the present invention will be described with reference to FIG. The process shown in FIG. 2 is performed according to the program stored in the ROM 12.
It is performed in the CPU 11.

First, in step S1, it is determined whether the balloon character display information table is in the initialized state. When this initialization has not been performed, the process proceeds to step S2 and this initialization operation is executed. For example, CPU11
Initializes the balloon character display information table stored in the hard disk device 2 when the system is started up or when the drawing file is read from the hard disk device 2. When the initialization is performed, the base line included in the drawing file read from the hard disk device 2 is searched, and the line segment part and the character string part (symbol) I of the searched base line are searched.
The D number is read and stored in the balloon character display information table.

That is, as shown in FIG. 3, the hard disk device 2 stores an index table associated with a graphic file, and this index table stores an index of the graphic drawn in the graphic file. ing. The class number of the line segment is stored in this index, and it is possible to determine from the class number whether or not the line segment is a core. When it is determined that the line segment included in the graphic file read from the hard disk device 2 is the line core, the line segment part and the ID number of the corresponding character string part are read from the index table and passed. It is stored in the character display information table in the core balloon. At this time, the CPU 11
Also, the number of cores in the display information table is counted. In this way, for example, as shown in FIG. 4, the balloon character display information table in which the number of cores, the line segment ID number of the core, the ID number of the character string part, etc. are confirmed is created, and the hard disk device is created. Stored in 2.

When the initialization operation shown in step S2 has already been performed, the process of step S2 is omitted.

Next, in step S3, it is determined whether or not the core is stored in the in-balloon character display information table initialized or already initialized in step S2. If the base line is not stored,
Since it is not necessary to display the corresponding numbers, alphabetic characters, etc., the processing ends.

On the other hand, when it is determined that the grid line is stored in the balloon character display information table, the process proceeds to step S4, and the display segment in the RAM 13 is initialized. This display segment stores the line segment and the symbol to be displayed in claim 6.

Next, in step S5, the next data corresponding to the ID number of the main line stored in the balloon character display information table is read from the information table. (1) Coordinates of the start and end points of the line segment of the base line (2) Coordinates of the base point and the size of the characters displayed inside the balloon (3) Radius of the balloon

As shown in FIG. 3, this information table stores data about each line segment of the index table, and is stored in the hard disk device 2.

Next, in step S6, the coordinate values of the line segment of the grid line read in step S5 are compared with the coordinates of the view area, and a character string corresponding to the grid line is displayed near the grid line. The position to be set is determined (the details will be described later with reference to FIGS. 6, 7, and 8). As shown in FIG. 5, this view area represents the range displayed on the display 5 in the drawing area corresponding to the range in which the drawing data read from the hard disk device 2 is drawn. In other words, the data over the entire drawing area is read from the hard disk device 2 and the RAM 1
3 of which is stored at a predetermined address, but only the range of the view area is further read from the RAM and stored in the RAM.
It is stored in 13 display segments. Then, the data of the display segment is displayed on the display 5.

Next, in step S7, the ratio between the drawing area and the view area is obtained, and the enlargement ratio of the character displayed in the balloon (balloon character) is calculated according to the following equation. Magnification rate = (Vh / Sh) x (standard size / character size)

The character size in the above equation represents the size of the balloon characters stored in the hard disk device 2 (the character size when created), and the standard size is
The character size is a predetermined character size that is preset as a character size that is easy for people to see. Further, Sh represents the height of the drawing area, and Vh represents the height of the view area, as shown in FIG.

Next, in step S8, it is determined whether or not the balloon character is present in the view area, and if the balloon character is present in the view area, the enlargement ratio calculated in step S7 is smaller than 1. It is determined whether or not.
That is, when the balloon character does not exist within the predetermined range (view area), the grid line cannot be specified. Therefore, a number or an alphabet character is displayed near the grid line. In S8, it is determined whether or not the balloon character is located outside the view area.

Further, even when the balloon character is within the range of the view area, when the size becomes smaller than a predetermined size (when it becomes difficult to see), the corresponding character is provided separately from the balloon character. Is displayed in the view area. In this step S8, it is determined whether or not the balloon characters have become difficult to see. In this embodiment, when the enlargement ratio is 1 or more, it is determined that the balloon characters are difficult to see, and corresponding numbers and alphabetic characters are displayed near the core.

That is, in step S8, if it is determined that the balloon character does not exist in the view area, or even if the balloon character exists in the view area, it is determined that the enlargement ratio is 1 or more. If step S
In step S9, the balloon character is copied to the display segment. That is, the balloon character drawn in the drawing area is copied to the display segment (provided in the RAM 13) initialized in step S4. The position to be copied is the position determined in step S6. Then, since the graphic corresponding to the data stored in this display segment is displayed on the display 5, by copying the balloon character to the display segment in this way, the vicinity of the grid line (determined in step S6) A number or alphabetic character of a size that is easy to see will be displayed in (position).

That is, the characters displayed in a size that is easy to see are
I only remember it for display,
In step S9, this is copied only to the display segment of the RAM 13 and is not stored in the drawing area of the RAM 13 or the hard disk device 2.

As described above, by not storing the data in the drawing area of the RAM 13 or in the hard disk device 2, quicker processing can be performed as compared with the case of storing. This is because, in the case where the data is stored in the drawing area of the RAM 13 or the database of the hard disk device 2, the displayed numbers and alphabetic characters are erased every time the display position is changed. This is done, and it is not necessary to write a character at that position), and the operation for displaying again at the new position must be repeated.

In step S8, when it is determined that the balloon character is present in the view area and the enlargement ratio is smaller than 1, the balloon character is displayed in the balloon in a size that is easy to see in the view area. Therefore, it is not necessary to separately display a number or an alphabet character for newly identifying the core. Therefore, in this case,
The process of step S9 is skipped.

Next, in step S10, it is determined whether or not all balloon characters in the view area have been checked for balloon characters. If there is another line core, the process returns to step S5, and the subsequent processes are repeated. If it is determined in step S10 that all the grid lines have been checked, the process ends.

Next, the method of determining the display position in step S6 in FIG. 2 will be described in more detail with reference to FIG. FIG. 6 shows a case where balloon characters are located outside the view area. In the example of FIG. 6, a balloon (a symbol indicated by a circle (circle) in the figure) is added to the upper end of the vertical passage core indicated by the alternate long and short dash line in the figure, and the numbers 1, 2, 3 is attached. On the other hand, a balloon is arranged at the left end of the horizontal core, and alphabetical characters A and B are attached to the balloon. That is, the vertical center line can be specified by the numbers 1, 2, 3, ... And the horizontal direction center can be specified by the alphabet letters A, B, C ,. It is done like this.

The starting point coordinates of the base lines 1, 2, and 3 are
(X _1S , y _1S ), (x _2S , y _2S ), (x _3S , y
_3S ), and the end point coordinates are (x _1E , y _1E ), (x
_2E , y _2E ), (x _3E , y _3E ). Similarly,
The starting point coordinates of the horizontal cores A and B are (x _AS ,
y _AS ), (x _BS , y _BS ), and their end point coordinates are (x _AE , y _AE ), (x _BE , y _BE ), respectively. The coordinates of the lower left corner point of the rectangular view area are (x
_min , y _min ), and the coordinates of the upper right corner point are (x
_max , y _max ).

In such a state, the size S ₂ of the display characters A and B displayed in a size easy to see in the vicinity of the horizontal grid in the view area is the original size of the balloon character S ₁ and step S7. When the enlargement ratio calculated in step S is K, it is calculated by the following equation. S ₂ = S ₁ × K

The characters displayed in the view area in a size that is easy to see are at positions close to the original balloon characters,
Displayed near the left or right edge of the view area. Then, the display position is calculated by the following equation when the character is displayed at the left end of the view area. In these equations, Δx and Δy represent the amount of movement (distance) in the horizontal direction (x-axis direction) and the vertical direction (y-axis direction) from the original balloon character, and r represents the balloon. Represents the radius of. _{Δx = x min -x AS + (} r + S 2/2) Δy = S 2/2

The above expression is an expression when the character is displayed at the left end of the view area, but the expression when it is displayed near the right end is as follows. _{Δx = x max -x AE - (} r + S 2/2) Δy = S 2/2

However, as shown in FIG. 7A, for example, when the character A is displayed on the upper side of the center line and the character A falls on the line at the upper end of the view area,
As shown in (B), the letter A is displayed below the core.

That is, the movement amount Δy in this case is expressed by the following equation. Δy = -S _2/2

Similarly, the position for displaying the number corresponding to the vertical grid line is determined as follows. Even in this case, the number corresponding to the position close to the original balloon character in the upper end and the lower end of the view area is displayed, but in the position close to the lower end. , Its display position is calculated as follows. _{Δx = S 2/2 Δy =} y min -y 1E + (r + S 2/2)

Further, the amount of movement when displaying near the upper end of the view area is calculated by the following equation. _{Δx = S 2/2 Δy =} y max -y 1S - (r + S 2/2)

As in the case described with reference to FIG. 7, when a character corresponding to the right side of a vertical grid line is displayed, that character is displayed in the view area as shown in FIG. 8 (A). In the case of the right end, as shown in FIG. 8B, a number is displayed on the left side of the core.
The movement amount Δx in this case is expressed by the following equation. Δx = -S _2/2

As described above, when the balloon character of the core is located outside the view area, the corresponding numeral or alphabetic character is near the end of the view area and As it is displayed in the vicinity,
As shown in, even when a part of the core (the part separated from the balloon by the size of the display range of the display 5 or more) is displayed on the display 5, the displayed core can be quickly displayed. And it can be specified reliably.

Similarly, as shown in FIG.
Even when the original balloon characters are present in the view area, when the characters are reduced in size so that they are difficult to see, the characters of easy-to-read size are displayed separately from the original balloon characters. Therefore, even in the case where the drawing is reduced and displayed on the display 5, it is possible to prevent it from being difficult to specify the core.

In the above embodiments, the case where the present invention is applied to the CAD system for creating architectural drawings has been described as an example, but the present invention can also be applied to the case where other drawings are created. Is.

[0059]

As described above, according to the line segment display device of the first aspect and the line segment display method of the fourth aspect, when the symbol for specifying the line segment is outside the predetermined display range, Since the symbol is displayed in the vicinity of the line segment within the display range, the line segment can be reliably specified even in the state where the arbitrary position of the line segment is locally displayed.

Further, according to the line segment display device of the second aspect and the line segment display method of the fifth aspect, it is possible to easily recognize even when the line segment is reduced and displayed. Since the symbols are displayed in various sizes in the vicinity of the line segment, the line segment can be reliably identified regardless of the scaling state of the line segment.

Further, according to the line segment display device of the third aspect and the line segment display method of the sixth aspect, the symbols to be displayed in the vicinity of the line segment are stored only for displaying. As a result, quick display is possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a line segment display device of the present invention.

FIG. 2 is a flowchart illustrating the operation of an embodiment of the line segment display method of the present invention.

FIG. 3 is a diagram illustrating a relationship between an index table and an information table according to the present invention.

FIG. 4 is a diagram illustrating a balloon character display information table of a core according to the present invention.

FIG. 5 is a diagram illustrating a relationship between a drawing area and a view area according to the present invention.

FIG. 6 is a diagram illustrating a state in which a balloon character is located outside the view area according to the present invention.

FIG. 7 is a diagram illustrating a display state of characters corresponding to a horizontal grid line of the present invention.

FIG. 8 is a diagram illustrating a state in which numbers corresponding to the vertical cores of the present invention are displayed.

FIG. 9 is a diagram illustrating a state in which a part of the core is locally displayed on the display.

FIG. 10 is a diagram illustrating a state in which the grid line is reduced and displayed on the display.

FIG. 11 is a diagram illustrating a state in which a center line and a symbol for identifying the center line are displayed on a conventional display.

FIG. 12 is a diagram illustrating a state in which a core is reduced and displayed as in the conventional case.

FIG. 13 is a diagram illustrating a state in which a part of the core is locally displayed as in the conventional case.

[Explanation of symbols]

 1 Processing Unit 2 Hard Disk Device 3 Keyboard 4 Mouse 5 Display 6 Plotter 11 CPU 12 ROM 13 RAM 14 Interface

Claims (6)

[Claims] 1. A line segment, a storage unit that stores a symbol corresponding to the line segment, a display unit that displays the line segment and the symbol stored in the storage unit, and a display position of the symbol is the A line segment display device, comprising: display control means for displaying the symbol near the line segment within the display range of the display means when the display means is outside the display range of the display means. 2. A line segment and a storage unit that stores a symbol corresponding to the line segment; a display unit that displays the line segment and the symbol stored in the storage unit; and a display unit that is displayed on the display unit. A line segment characterized by comprising display control means for displaying the symbol in the vicinity of the line segment in a size that can be easily recognized when the size of the symbol becomes smaller than a predetermined size. Display device. 3. The storage means includes a first storage means for storing the line segment and the symbol, and a second storage means for storing the line segment and the symbol in a range displayed on the display means. 3. The line segment display device according to claim 1, wherein the display control unit stores the symbol displayed in the vicinity of the line segment only in the second storage unit. 4. A line segment and a symbol corresponding to the line segment are stored, and among the stored line segments and symbols, a predetermined range is read out and displayed in a predetermined display range. When the display position of is outside the display range, the symbol is displayed in the vicinity of the line segment within the display range. 5. A line segment and a symbol corresponding to the line segment are stored, and the line segment and the symbol stored in a predetermined range are read out and displayed, and the displayed symbol is displayed. A line segment display method, wherein when the size becomes smaller than a predetermined size, the symbol is displayed in the vicinity of the line segment in a size that can be easily recognized. 6. The line segment and the symbol are stored separately for storage and for display, and the symbol displayed near the line segment is for display. The line segment display method according to claim 4, wherein only the line segment is stored.