JP2001297330A - Drawing preparing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing preparing device for automatically generating a hatching pattern for making a boundary or division conspicuous on a drawing such as map. SOLUTION: This device is provided with an input means for designating a pattern format to be applied and designating a pattern area to apply patterning in the designated pattern format, a reference line determining means for determining a first boundary reference line L to become the reference of pattern generation and a second boundary reference line M facing this first boundary reference line from the pattern area, and a pattern line generating means for generating a pattern line, which is extended from the first boundary reference line to the second boundary reference line, at a prescribed pitch on the basis of the pattern format.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an apparatus for creating a drawing by using a computer, and to a drawing forming apparatus for generating and drawing a pattern such as hatching in an arbitrary drawing area.

[0002]

2. Description of the Related Art In such a drawing forming apparatus generally called a CAD system, for example, a closed figure such as a cross section is selected and a hatching pattern is specified when a mechanical drawing is created. A hatch according to the selected pattern is generated, and the hatch is drawn in the selected figure. Such hatching patterns frequently used in mechanical drawings are generated by repeatedly calling a pattern generating function (for example, a hatched line can be represented by a linear function) that creates a simple graphic element set in advance in the apparatus. Done.

[0003]

However, in the above-described generation of a hatching pattern, if a pattern other than a simple hatching pattern based on a method of creating a mechanical drawing is used, a new pattern generation function must be loaded. Rather time-consuming. In particular,
The hatching pattern provided in the conventional CAD system basically fills the designated area in such a manner that a line extending at the same angle is repeated for one closed figure. A pattern such as a horizontal line that is repeatedly added in the direction of extension of the boundary line to create a beard on the boundary line, which is necessary for creating a map, etc. in order to clarify the boundary of the special land and building, Person is 1
Unless they were handwritten one by one, they could not be drawn. In view of the above situation, an object of the present invention is to provide a drawing creating apparatus that automatically generates a hatching pattern that makes boundaries and sections stand out in a drawing such as a map.

[0004]

In order to solve the above-mentioned problems, a drawing creation apparatus according to the present invention specifies an applicable pattern format and an input for designating a pattern area on which a pattern is to be applied in the specified pattern format. Means, a first boundary reference line serving as a reference for pattern generation from the pattern area, and reference line determination means for determining a second boundary reference line facing the first boundary reference line, and the first line reference line based on the pattern format. Pattern line generating means for generating pattern lines extending from the boundary reference line toward the second boundary reference line at a predetermined pitch.

According to this configuration, the first boundary reference line as a graphic boundary line to be a starting point of the pattern line from the designated graphic region and the first boundary reference line to be the target of the pattern line A facing second boundary reference line is determined,
Pattern lines extending from the first boundary reference line toward the second boundary reference line are sequentially generated. Attribute values such as pattern line length and arrangement pitch can be determined in a pattern format. As a result, a hatching pattern extending like a whisker from the boundary line to make the designated boundary or section stand out is automatically generated, so that the burden on the drafter is reduced.

As one preferred embodiment of the present invention, the pattern format includes a length of a segment constituting the first boundary reference line, and the pattern line extends from each segment. There is. In this case, since the first boundary line is divided into a large number of segments and the pattern lines extend from each segment, the number of segments corresponds to the number of pattern lines. When the number of segment divisions is increased, that is, when the length of the segment is increased, the pitch of the pattern lines becomes coarse. When the number of segment divisions is reduced, that is, when the length of the segment is reduced, the pitch of the pattern lines becomes dense. In addition, when the starting point of the pattern line is associated with the start point or the end point of the segment, the arithmetic processing for generating the pattern line becomes easy.

[0007] In another preferred embodiment of the present invention,
Some of the pattern formats include a maximum length that the pattern line extends unless it intersects with the second boundary reference line. In this case, since the maximum length of the pattern line can be set in advance, unlike a hatching pattern in a mechanical drawing, if the distance between the first boundary reference line and the second boundary reference line is large, the pattern Since the line is cut off in the middle, it is possible to avoid obscuring a drawing such as a map by filling a large area with hatching.

[0008] In still another preferred embodiment of the present invention, the pattern line is aligned with the first boundary reference line, that is,
It is generated to extend at a certain angle for each segment. This allows the segment only to bend,
Since the extending direction of the pattern line is changed, the bending of the boundary line becomes clear, and the drawing such as a map is easily viewed.

In still another preferred embodiment of the present invention, the pattern format includes a code for determining display or non-display of each segment constituting the first and second boundary reference lines. A dotted line is obtained by repeating the display and non-display of the segment. For example, a boundary reference line divided by a large number of segments can display a dashed line simply by displaying only the odd numbers of the continuous segments and hiding only the even numbers, or can be set to all non-displays This makes it possible to represent the boundary only with the pattern line. This function is particularly convenient when the first and second boundary reference lines overlap with some graphics or the like to make it difficult to see. Other features and advantages according to the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a functional block diagram for one embodiment of a drawing creation apparatus (CAD system) according to the present invention. This device is particularly suitable for drawing a water pipe network or a gas pipe network based on a map. The input means 1 includes a pointing device 1a such as a mouse, a keyboard 1b, a controller 2 as a CAD body, and an operator. A display 3 for giving guidance on selection setting and displaying a created drawing and a printer 4 for making a hard copy of the created drawing are provided. The controller 2 includes an input / output interface 2a for controlling the exchange of signals with external devices and a drawing creation control unit 20. The drawing creation control unit 20 has functions that are closely related to the present invention. The functional blocks realized by software and software include a drawing / editing processing unit 21, a pattern area evaluation unit 22 including a reference line determination unit 22a, a pattern format processing unit 23, and a pattern line generation unit 2.
4. The display control unit 25 is constructed.

The input means 1 designates a pattern format to be applied from a command menu displayed on the display 3, specifies a point when drawing on the drawing displayed on the display 3, and sets a target at the time of pattern generation. Or a different pattern area.

The drawing / editing processing unit 21 interprets the command specified by the input means 1 to generate a specified graphic element at a specified position, or deletes, copies, and moves a selected graphic element. And other editing processes. The drawing data composed of a large number of graphic elements generated by the drawing / editing processing unit 21 is stored in the drawing data storage unit 26, and is read out as needed.

The pattern area evaluation unit 22 has a function of evaluating an area on the drawing of a polygonal frame designated by the mouse 1a as a pattern area to be subjected to a pattern, and discriminating the inside and the outside of the area. ing. In particular, from the designated polygon frame, a first boundary reference line that is a polygon boundary line (side) to be a starting point of the pattern line and the first boundary reference line to be a target of the pattern line are faced. The process of determining the second boundary reference line is performed by the reference line determination unit 22a.

FIG. 2 shows the determination of the first and second boundary reference lines.
This will be described with reference to FIG. Four points a1, a2, a3, a4 are sequentially designated by the mouse 1a to designate a pattern area.
Click to specify a polygon (in this case, a square) frame. In order to finally specify the polygon, the user double-clicks the fourth point a4 or finally clicks the first point a1 again. From such a point designation signal sent from the mouse 1a, the pattern area evaluation unit 22 calculates four sides 31, 32 as pattern areas.
A square having 33 and 34 is grasped. Next, the reference line determination means 42a outputs the designated polygon (a quadrangle in this case).
From the first point a1, the quotient obtained by dividing the number of broken points (the number of vertices) of this polygon: n (here, n = 4) by 2: m (here, m: = 2) th The side (here, side 31) defined by the point (here, point a2) is regarded as the first boundary reference line: L, and the side (here, side 33) defined by the last point from the (m + 1) -th point is defined as the second. Boundary reference line: M is assumed. According to the present invention, a pattern line is generated starting from the first boundary reference line: L toward the second boundary reference line: M.
At the time of drawing this pattern line, its length is limited so as not to exceed at least the second boundary reference line.

The generation of a pattern line starting from the first boundary reference line defined by the reference line determination unit 22a is performed by the pattern line generation unit 24. The pattern line drawing mode is described below. It is determined by the format. Although the pattern format is shown in FIG. 3, various types of pattern lines can be freely defined based on the pattern format by the operation of the pattern format processing unit 23. The defined pattern format is the pattern format. Storage unit 2
7 for retrieving and extracting.

The display control unit 25 superimposes the pattern lines generated by the pattern line generation unit with reference to the selected pattern format and the lines as the segments forming the boundary reference lines on the basic CAD drawing. 3 is displayed.

As apparent from FIG. 3, the components of the pattern format include a pattern area ID number 41, a pattern type code 42, a second boundary reference line drawing mode 43, and a first boundary reference line and pattern line drawing. Mode 44
Since the first boundary reference line is divided into a number of segments and a pattern line is drawn from each segment, this drawing mode 44 is defined by repeating several different modes. .

The pattern area ID number 41 usually designates a large number of pattern areas in one drawing, and a pattern is applied thereto.
By incorporating this pattern area ID number 41 into the drawing data together with its position information, the data is automatically read from the pattern format for pattern drawing when the drawing is displayed, and once set. The pattern will be displayed. The pattern type code 42 is a code for distinguishing from a pattern drawn by another method.

As shown in FIG. 4, the second boundary reference line drawing mode 43 is composed of numbers delimited by a delimiter code ":", and the numbers are used for segments which constitute the second boundary reference line. The length and the sign of the number indicate display or non-display setting. The plus sign can be omitted. For example, "100: -100"
If so, a dashed line that repeats a line of length 100 with display and non-display is generated (see FIG. 4A). These numbers represent actual dimensions. Also, if only "100",
Will repeat the displayed line of length 100,
As a result, it becomes a solid line (FIG. 4 (b)), and if it is only "-100", it becomes a repetition of a line of length 100 which is not displayed, and as a result, nothing is displayed. Therefore, when there is no solid line or no line display, the numbers have no meaning and are merely dummy.

The drawing mode 44 represents a combination of a large number of segments constituting the first boundary reference line and a pattern line drawing mode, and the segments are the same as the second boundary line drawing mode 43. In this embodiment, the pattern line is drawn as a perpendicular from each segment of the first boundary reference line. As shown in FIG. 5, the pattern line drawing mode is represented by a symbol and a number following the code “SL” representing the pattern line. The symbol "P" indicates, with the number following it, what percentage to display as a value determined as the distance from the second boundary reference line,
Represents. Furthermore, the symbol "L" and the number following it represent the maximum drawing length of the pattern line, and the symbol "S" and the number following it represent the minimum drawing length of the pattern line. For example, if "P100: L5000: S500, 1500", the distance to the second boundary reference line or 5000 if the distance exceeds the maximum drawing length of 5000.
Represents the drawing length of the pattern line. In FIG. 5, the pattern line is drawn with a length of 5000. Further, a 1500-length line is drawn as a segment of the first boundary reference line. Furthermore, if “P50: L5000: S500” continues, the drawing length of the next pattern line is 50% of the distance to the second boundary reference line. However, if the length of 50% of the distance to the second boundary reference line is less than the minimum drawing length of 500, this pattern line is not drawn.

Next, a typical pattern area and the selected 1
One pattern format and a pattern applied to a pattern area based on the pattern format will be described with reference to FIG. The illustrated pattern format is assigned to a pattern area in which the number of break points (vertices: a1 to a10) is set as a polygon having ten. The pattern area ID number 41 is “22010”, the pattern type code 42 is Is "HL". Here, "HL" represents a pattern composed of pattern lines extending perpendicularly from the first boundary reference line. Second boundary reference line drawing mode 4
3 is “500: −500”, so the second boundary reference line is repeatedly drawn over the entire range with a solid line portion and a broken line having a blank portion length of 500. In the figure, in order to make it easy to understand the relationship between the format components and the drawn pattern, ()
The numbers surrounded by are given.

The first arrangement of the first boundary reference line drawing mode 44 is "SL: P100: L5000: S500". “SL” indicates the beginning of the format of the pattern line, and as is apparent from the above description, the distance to the second boundary reference line under the condition that the maximum length is 5000 and the minimum length is 500. It is specified that 100% be the pattern length. Here, the pattern area evaluation unit 2
The distance to the second boundary reference line calculated by 2 is 80
Since it is 00, the condition of the maximum length is applied, and the length of the pattern line to be drawn is 5000 (see (1) in the figure).
This first sequence is followed by ", 1500"
Defines the length of the segment of the first boundary reference line starting from the starting point of the previous pattern line,
A solid line having a length of 0 is drawn ((2) in the figure).

Subsequent first boundary reference line drawing mode 4
The arrangement of No. 4 is “SL: P50: L5000: S500”, and the conditions of the maximum length and the minimum length are the same as the previous pattern line, and 50% of the distance to the second boundary reference line is the pattern length. Therefore, the length of the pattern line to be drawn is 4000 (see (3) in the figure). Further, a solid line having a length of 1500 is drawn as a segment of the first boundary reference line by ", 1500" ((4) in the figure).

The last sequence of the first boundary reference line drawing mode 44 is “SL: P100: L2000: S2000,15”.
00 ", a pattern line having a length of 2000 is drawn (FIG. 5 (5)), and 1
A solid line having a length of 500 is drawn ((6) in the figure). Thus, one cycle for drawing the pattern line defined by the first boundary reference line drawing mode 44 and the segment of the first boundary reference line is completed, and the cycle ends at the end of the first boundary reference line. Repeat until

In the repetition of the drawing cycle, when the distance between the first boundary reference line and the second boundary reference line changes, the length of the pattern line also changes. As a typical example, in the repetition 5 of the drawing cycle shown in FIG. 6, two pattern lines are not displayed (not drawn) due to the condition of the minimum length.

When a pattern area is first designated by using the mouse 1a, if the number of break points is 3 or less (that is, a triangle) or if the sides obtained by connecting the break points intersect, the first The boundary reference line and the second boundary reference line cannot be defined. When confirming such inconvenience, the pattern area evaluation unit 22 cancels the designated pattern area, and
If necessary, a message prompting to specify a pattern area again can be displayed on the display 3.

In the above-described example, the pattern line extends vertically from the first boundary reference line. However, by changing the type of the pattern line, the pattern line extends not in a pattern line extending at various angles or in a dashed line but in a solid line. Pattern lines can be drawn. Also, the color can be freely specified.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing main functions of a drawing creating apparatus as an example of the present invention.

FIG. 2 is an explanatory diagram illustrating the definition of a first boundary reference line and a second boundary reference line in a pattern area.

FIG. 3 is a format structure diagram showing components of a pattern format.

FIG. 4 is an explanatory diagram illustrating a pattern format for a boundary reference line.

FIG. 5 is an explanatory diagram illustrating a pattern format for a pattern line.

FIG. 6 is an explanatory diagram showing a typical example of pattern drawing

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input means 2 Controller 3 Display 21 Drawing / editing processing unit 22 Pattern area evaluation unit 22a Reference line measuring means 23 Pattern format processing unit 24 Pattern line generation unit 27 Format storage unit

Claims (5)

[Claims] 1. An input means for designating a pattern format to be applied and designating a pattern area on which a pattern is to be applied in the designated pattern format; and a first boundary reference line serving as a reference for pattern generation from the pattern area. Reference line determining means for determining a second boundary reference line facing the first boundary reference line; and a pattern line extending from the first boundary reference line toward the second boundary reference line at a predetermined pitch based on the pattern format. And a pattern line generating means for generating a drawing line. 2. The pattern format according to claim 1, wherein:
The drawing creation apparatus according to claim 1, wherein the length of a segment forming a boundary reference line is included, and the pattern line is extended from each segment. 3. The pattern format includes the second
The drawing creation apparatus according to claim 1, wherein a maximum length of the pattern line is included unless the pattern line intersects a boundary reference line. 4. The apparatus according to claim 1, wherein said pattern line extends at a fixed angle with respect to said first boundary reference line.
A drawing creation device according to any one of the above. 5. The pattern format according to claim 1, wherein
A code for determining display or non-display of each segment constituting the second boundary reference line is included, and a dotted line is obtained by repeating display and non-display of each segment. 5. The drawing creation device according to any one of 4.