JP3244569B2 - One-side parallel line automatic creation system and one-side parallel line automatic creation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-sided parallel line automatic map system, and in particular, records for expressing graphic display lines in various drawings such as facility management maps, topographic maps, and design drawings are already in vector data format. When stored, a parallel line on one side thereof is automatically drawn over an arbitrary designated section on the graphic display line, for example, a side groove line corresponding to a section with a sidewalk line is automatically drawn. In this specification, the record is referred to as a "line drawing record", and its constituent data such as coordinate data is referred to as "line drawing data".
That.

2. Description of the Related Art In general, it has been widely practiced to create and modify various drawings by computer processing of line drawing records. However, in order to enhance the convenience, parallel lines can be automatically created on one side of graphic display lines. The present invention responds to this request.

[0003]

2. Description of the Related Art FIG. 17 is an explanatory diagram showing an outline of hardware when a general computer creates and corrects various drawings by using a computer.
22 is a large-capacity disk external storage device for storing line drawing records, etc., and 23 is a storage area for application programs.
A disk external storage device having a work area 24 and a work area 25; 26, an operation unit for inputting drawing numbers and the like; 27, a digitizer for inputting drawing data; 28, an input state of line drawing data and drawing data Display for confirming the contents of
Indicates plotters for outputting the created drawings and the like.

Here, the input / correction of the line drawing data is performed by pasting a paper drawing on which a graphic display line to be processed is written on a digitizer 27, and characteristic points of the graphic display line on the paper drawing and the contents of the correction. The input data is stored in the disk external storage device 22 in the form of a line drawing record in units of graphic display lines or a part thereof.

FIG. 18 is an explanatory view showing the format of a graphic display line and its line drawing record. P _{1 to} P ₁₈ denote the characteristic points of the graphic display line 30, that is, the line segments constituting the graphic display line and the like. shows the end points, such as semicircle, also (x _i, y _i)
Indicates coordinate data of the i-th feature point.

The line drawing record itself comprises a header 31, an area 32 for storing the number of line drawing data, and a line drawing data area 33 of a two-dimensional data array. Reference numeral 34 denotes a line drawing data area. The middle attribute data area is shown. As is apparent from the drawing, the vector data stored in the line image data area 33 includes the coordinate data of the end point of the semicircle.

[0007] Figure 19 is an explanatory view showing the contents of each attribute data, for example, line drawing data of FIG. 18 - 5 th attribute de in data - data "-4" the line between P ₄ and P ₅ the data "- 2" are those segments between P ₉ and P ₁₀ are the broken lines - min that those semicircular in the traveling direction left and 11 th attribute de Is shown. The solid line display that is frequently used is defaulted, and its attribute data is omitted.

That is, in the case of the graphic display line 30, the line drawing data
The number of data is “21” and the number of coordinate data is “1”.
8 ", the number of attribute data is" 3 ", and each attribute data is stored as code data having a negative sign in a portion corresponding to the x coordinate of the two-dimensional array. This storage location may be a portion corresponding to the y coordinate.

The attribute data shown in FIG. 19 is composed of a 32-bit negative number and can be distinguished from each other by a bit number which becomes "1" when complemented by "2". , By selecting each attribute data as a negative number in which only two bits of the leading bit and one of the remaining bits are "1", the complement of "2" is obtained. The processing may be omitted.

When inputting line drawing data for expressing a one-sided parallel line such as a gutter line over a predetermined section of a graphic display line such as a sidewalk, the original drawing with the one-sided parallel line added is pasted on a digitizer. A method centering on manual work, such as inputting each feature point of the one-side parallel line to a digitizer after attaching, is used.

[0011]

As described above, the conventional
In the method of creating a one-sided parallel line for a figure display line on a drawing, since the feature points of this one-sided parallel line are specified exclusively by a human operator or the like, sufficient accuracy cannot be ensured and the work There was a problem that time was long.

Therefore, according to the present invention, the one-side parallel line creation target section, the one-side parallel line creation side, and the attribute data indicating the end point processing of the one-side parallel line obtained by the input operation of the operator, the reference for the one-side parallel line creation, It is an object of the present invention to automatically create a predetermined one-sided parallel line based on a line drawing record of a figure display line, thereby increasing the creation accuracy and shortening the processing time.

[0013]

According to the present invention, vector data in which line drawing data (coordinate data and attribute data indicating the display mode of the next feature point as it is) of each feature point are arranged according to the respective arrangement order. The operator specifies the endpoints of the one-sided parallel line creation section for the figure display line represented by the line drawing record in the format, and whether these endpoints should be connected to the created one-sided parallel line, and so on. From the end point of the figure to the end point on the end point side, the intersection of the parallel line to the part of this graphic display line to the next feature point and the parallel line to the part from the next feature point to the next feature point in order Then, these intersections are used as desired one-side parallel line feature points.

FIG. 1 is a diagram illustrating the principle of the present invention. In the figure, reference numeral 1 denotes a part of the drawing, and shows a state in which a one-side parallel line 12 has been created over a designated section (S to E) of a graphic display line 11 specified by a previously input line drawing record. In addition,
A _i , A _j ... Are characteristic points of the graphic display line 11. 2
Is a storage device, in which each line drawing record in a vector data format indicating each graphic display line on each drawing is stored in such a manner that it can be taken out, for example, for each drawing number. Reference numeral 3 denotes an input unit which determines a section to be processed (S to E) in the graphic display line 11, which side of the graphic display line 11 to create the one-side parallel line 12, and furthermore, processes an end point of the one-side parallel line 12 (one side). For example, a digitizer is used for giving instructions on whether or not each end point B ₁ , B _{N of the} parallel line is connected to S, E). Reference numeral 4 denotes an application program.
Is calculated.

Here, the processing procedure for calculating the one-sided parallel line of the application program 4 is as follows. That is, a line drawing record of the graphic display line 11 closest to the designated points S and E or having these points on the line is searched from the line drawing record group of the drawing to be processed, and each feature point A _i , These designated points are incorporated in the line drawing record in a form corresponding to the arrangement order of A _j (see FIGS. 4 and 8), and the process proceeds to the next step. The designated point S is set as the processing start point, and the process proceeds to the next step. From the line connecting the processing start point and the next feature point, a parallel line separated by a predetermined distance L toward the creation side specified by the input unit 3 is calculated, and the process proceeds to the next step. It is determined whether the processing start point is the designated point S, and “YE
If “S”, proceed to the next step; if “NO”, proceed to step. A perpendicular is drawn from the designated point S to a (current) parallel line to calculate the intersection B ₁ , and the process proceeds to step. Intersection points B ₂ , B _3, ... of the current parallel line and the previous parallel line
・ Calculate and proceed to the next step. It is determined whether or not the next feature point is the designated point E, and “YE
If "S", proceed to the step; if "NO", proceed to the next step. The next feature point is set as the processing start point, and the process returns to the step. A perpendicular line is drawn down from the designated point E to a (current) parallel line to calculate an intersection _BE thereof, and the process proceeds to the next step. By the procedure such as, one parallel lines for the graphical display lines 11 _{[(S) -B 1 -B 2 -B} 3 - ··· -B E - (E) ]
Twelve line art records are created.

[0016]

As described above, according to the present invention, the section for creating one side parallel line of the graphic display line specified by the line drawing record in the vector data format, and which side of the graphic display line to perform the creation processing, etc. Based on the instruction, from the start point to the end point of the creation section, a first parallel line parallel to the line segment to the next feature point of the graphic display line, and a line segment from the feature point to the next feature point While sequentially finding the intersection with the parallel second parallel line, the perpendicular is drawn from the start point to the first parallel line, and the perpendicular is drawn from the end point to the last parallel line, and each intersection is found. The end points (start point, end point) of the created section are used as feature points of a one-side parallel line.

That is, the application program 4
By the processing of the step-step, to calculate the intersection point B ₁ when a perpendicular line is dropped on the first parallel lines from the beginning of the creation interval, the loop composed of steps ,,, and step, a first parallel The intersections B ₂ , B _3, ... Of the line and the second parallel line are calculated in order, and the intersection B when a perpendicular is drawn down from the end point of the creation section to the last parallel line by step and step processing.
_E is calculated.

The drawing used for the one-sided parallel line creation processing is created by extracting a line drawing record group of the drawing from the external storage device 2 and writing each graphic element line based on the drawing, as in the conventional case. .

The parallel line in the above step is created only for the side specified by the input unit 3 (in the case of the drawing, the left side with respect to the vector data direction of the line drawing record). , Or may be input by the operator in the same manner as the designated points S and E.

In addition, the end points of the one-side parallel line 12 are designated as designated points S and E.
Or the intersections B ₁ and _BE are determined in accordance with the instruction from the input unit 3 regarding the connection between these instruction lines and the intersections. If this instruction is “connection”, the instruction points S, E is the end point, and in the case of "open", the intersection points B ₁ and _BE are the end points. Note that one of the designated points S and E and the corresponding _{one of} the intersections B ₁ and _BE may be defined as end points.

When the first parallel line and the second parallel line are substantially the same, the second parallel line (or the first parallel line) can be used without performing the calculation processing as described later. The pseudo intersection may be obtained above, or the calculation of the feature point (of the one-side parallel line 12) based on the first parallel line and the second parallel line may be omitted.

[0022]

An embodiment of the present invention will be described with reference to FIGS. In the following description, for convenience of explanation, a case in which a gutter parallel to the sidewalk line is automatically created in a drawing (see FIG. 2) describing the block 15 and the sidewalk line 16 is used and used. Since the outline of the hardware is the same as that shown in FIG. 17, the reference numerals will be used as necessary.

In FIG. 2, points [1] to [113] are characteristic points of the sidewalk line 16, S and E are end points of the side groove line creation processing section, and D is the side groove line 17 (see FIG. 6). Input points for designating which side of the 16 are to be created are shown.

Here, S and E, which are two points for specifying the gutter line creation processing section, are inputted from a digitizer or the like, and among these, the characteristic points when viewed from the arrangement order of the characteristic points in the line drawing record [ 1], the later-described gutter line creation processing is started.

The line drawing record of the sidewalk line 16 is shown in FIG. 3, and its contents include a header, an area for storing the number of data, a line drawing data area, and the like, like the line drawing record in the figure. In addition, each arc portion of the sidewalk line 16 (feature point
[1] to [25], feature points [31] to [55], feature points [58] to [82], and feature points [89] to [113]) Is included in the line drawing record.

FIG. 4 shows S and E in the line drawing record of FIG.
FIG. 13 is an explanatory diagram showing a state in which line drawing data of each designated point is added, and line drawing data (attribute data and coordinate data) of a designated point S is followed by line drawing data (coordinate data) of a feature point [25]
Are added, and the line drawing data (attribute data and coordinate data) of the designated point E are added after the line drawing data (coordinate data) of the feature point [88].

As a result, the number of data in the line drawing record is increased by two for each designated point, and is increased from "113" to "11".
7 ". Note that “−512” in the attribute data portion indicates that the end point processing at the gutter line side feature point corresponding to the indicated point is “connection to the indicated points S and E”. In the case of "open", "-1024" is entered in the attribute data part (see FIG. 5).

FIG. 6 is based on the line drawing record of FIG.
FIG. 7 shows a drawing in which a gutter line 17 is created outside the sidewalk line 16 of FIG. 7, and FIG. 7 shows a case where the line drawing record is set for each of the sidewalk line 16 of FIG. FIG. 8 shows the designated point S in the first half of the line drawing record.
9 shows a case where line drawing data of E and E are added.

In the case of FIG. 7, the last feature point [57] of the first half of the sidewalk 16 and the first feature point [1] of the second half overlap,
The designated point E substantially coincides with the feature point [57]. As shown in FIG. 8, the number of data of the line drawing record at this time increases by two at the designated point S, while at the designated point E, the attribute data (“−512” or “−1024”) and the coordinate data ( = The coordinate data of the feature point [57]), and the total number of data increases by three to "60" from the previous "57".

FIGS. 9 to 10 are explanatory diagrams showing the processing procedure when creating a gutter line between the designated point S and the designated point E of the sidewalk line. That is, (11) a line drawing record group of the drawing to be processed is taken out from the external storage device 22 and developed in the work area 25 to create a drawing in which graphic display lines (block lines and sidewalk display lines) based on these line drawing records are written. And paste this on digitizer 27,
Proceed to the next step. (12) An arbitrary point on the sidewalk line on which a process for creating a one-side parallel line is to be input by a digitizer, and the process proceeds to the next step. (13) The line drawing record of this sidewalk line is retrieved from the work area 25, the color of the corresponding line portion on the display unit 28 is changed, and the process proceeds to the next step. In this search, the work area 25
Check each line drawing record of the development, and if there is a line drawing record containing the input point of step (12) on that line, select this.If no such line drawing record is found, select it from the input point. The distance to the line based on each line drawing record is obtained and the one that minimizes the distance is selected. (14) One designated point (start point) S for specifying the side groove line creation section is digitized and input to the next step. (15) The end point processing method of the designated point S, that is, whether or not this designated point is connected to the end point of the side groove line is input, and the process proceeds to the next step. For this input, for example, a menu input function of the digitizer 27 is used. (16) The line drawing data of the designated point S is added to the corresponding position of the line drawing record obtained in step (13) (see FIGS. 4 and 8), and the process proceeds to the next step. The subroutine in FIG. 11 is used for this processing. (17) The other designated point (end point) E for specifying the side groove line creation section is digitized and input to the next step. (18) Input the end point processing method of the designated point E in the same manner as in step (15), and proceed to the next step. (19) The line drawing data of the designated point E is added to the corresponding position of the line drawing record in the same manner as in step (16), and the process proceeds to the next step. (20) Digitizer input of a designated point D for specifying which side of the side groove line to be created, that is, a right or left side of the sidewalk line from the designated point S to the direction E toward the side groove line, Proceed to the next step. (21) The sub-line of the side groove line is executed to obtain the line drawing record of the side groove line, and the process proceeds to the next step (see FIGS. 12 to 14). (22) Store this side groove line record in the side line layer, display the side groove line 17 based on the record, and proceed to the next step. (23) It is determined whether or not the processing has been completed for all the parts of the sidewalk line for which the creation of the side gutter is to be completed. If “NO”, the process returns to step (12). By executing a series of processing such as this, a gutter line for a designated section on the sidewalk line is created.

Here, if one sidewalk line is represented by a plurality of line drawing records (see FIG. 7), and the target section for creating the gutter line extends over these plurality of line drawing records, step (1) is executed.
3) The specific color display and the subsequent groove line creation processing are performed in units of this line drawing record, and the determination in step (23) is "NO" until the processing for all these line drawing records is completed.

The discrimination between the designated point S as the starting point and the designated point E as the ending point is as seen from the operator who inputs them. Attribute data and coordinate data for these points, which are both end points, are simply inserted at the corresponding positions.
There is no information indicating whether the data is the start point or the end point of the gutter line creation section, and it is not necessary.

FIG. 11 is an explanatory diagram showing a subroutine used in steps (16) and (19). The procedure is as follows. The sidewalk lines in FIGS. 2 and 7
All of the 16 feature points are displayed as solid lines, and the line drawing data is attribute data omitted and only coordinate data. Therefore, in the following description, it is expressed as "line drawing data (coordinate data)" as necessary. .

The contents of this subroutine are as follows: (31) By using the coordinate data of the designated points S and E and the line drawing record of the pedestrian line to be processed, whether these designated points deviate from the characteristic points of the pedestrian line. Judge whether or not "YES
"", The process proceeds to the next step, and if "NO", the process proceeds to step (33). In this case, the point S,
Whether the distance between E and each feature point is equal to or less than a predetermined value is used. (32) Cut between coordinate data in the line drawing record of each feature point located before and after the designated points S and E, and set the coordinate data of the designated point as the data number "i". At the same time, the following line drawing data (coordinate data) is shifted one by one, and the process proceeds to step (34). The data number "i" at this time is the larger value of the data numbers of the two feature points to be cut, and the data number of the line drawing record increases by "1". (33) Line drawing data (coordinate data) of feature points near the designated points S and E
The data number "i" is stored, and the process proceeds to the next step. (34) The line drawing data (coordinate data) below the data number "i" of the line drawing record, that is, the coordinate data of the designated points S and E are shifted one by one, and the process proceeds to the next step. (35) Step (15), in accordance with the end point processing method for the specified designated point S, E in (18), data of a line drawing records - data attribute data of number "i" - data (x _i, y _i) as When connection is designated, (-512, 0) is set, and when connection is designated, (-1024, 0) is set. Thus, a new line drawing record shown in FIGS. 4 and 8 is created by this series of processing.

FIGS. 12 to 14 show the subroutine used in step (21) of FIG. 10 (a subroutine for generating a side groove line 17 parallel to the sidewalk between the designated points S and E). It is a diagram and the procedure is as follows. Note that (x, y) indicates the coordinates of each feature point including the designated points S and E of the sidewalk line 16, and (X, Y) indicates the coordinates of each feature point of the gutter line 17.

(41) “0 → i, 1 → j” for variables i and j
Then, the flag for confirming the attribute data of the end point E is set to "0", and the process proceeds to the next step. (42) As “(i + 1) → i”, proceed to the next step. (43) line drawing record Karade sidewalk line 16 - line drawing data (x _i, y _i) of the data number "i" by calling, the process proceeds to the next step. (44) as "x _i → x _C", proceed to the next step. (45) Determine whether or not “x _C = −512 or x _C = −1024”, and if “YES”, proceed to the next step,
If "NO", the process returns to the step (42).

According to the above processing procedure, the attribute data of the designated point S is retrieved from the line drawing record of the sidewalk line 16, and the following ditch line creation processing is sequentially performed from the next line drawing data (coordinate data of the designated point S). Will be.

(46) As “(i + 1) → i”, proceed to the next step. (47) line drawing record Karade sidewalk line 16 - line drawing data of data number "i" (x _i, y _i), i.e. the coordinates data of the designated point S -
And go to the next step. (48) Determine whether or not “x _C = −512”, and select “YES”.
If "", proceed to the next step, and if "NO", proceed to step (50). In the case of the former “connection”, the designated point S
The gutter starts from (see FIG. 5). (49) _{"x i → X j, y i} → Y j, x i → x OLD, y i →
_yOLD "and the process proceeds to a step (52). (X ₁ , Y ₁ ) obtained here becomes the coordinates of the designated point S. (50) _{"x i → x OLD, y i} → y OLD " as, proceed to the next step. (51) As “(i + 1) → i”, proceed to step (53). (52) As “(i + 1) → i, (j + 1) → j”, proceed to the next step. (53) line drawing record Karade sidewalk line 16 - line drawing data (x _i, y _i) of the data number "i" by calling, the process proceeds to the next step. (54) The feature points of the neighbors on the sidewalk (x _OLD , y _OLD )
F ₁ (x, y) indicating a parallel line separated by a predetermined length Δ from the line connecting (x _i , y _i ) and (x _i , y _i ) is calculated. Note that this f
₁ (x, y) is obtained, for example, as shown in FIG. 15, and the code indicating the side on which the parallel line is to be created is obtained, for example, by the method shown in FIG. (55) From the designated point E (x _OLD , y _OLD ), find the intersection coordinates (X _H , Y _H ) of the perpendicular drawn down to this parallel line and obtain “X
_H → X _j , Y _H → Y _j ”, and proceed to the next step.

The first feature point (excluding the designated point S in the case of "joining") of the side groove line 17 is specified by the above processing procedure. That is, (X _j , Y _j ) in step (55) is set as (X ₂ , Y ₂ ) in the case of “joining” and as (X ₁ , Y ₁ ) in the case of “open”. You.

[0040] Although not shown, the attribute of x _i is indicated point E in the step (53) is a specific case, such feature points between the designated point S and the designated point E trail line 16 does not exist de The data becomes “−512 or −1024”, and the parallel line f ₁ (x, y) in step (54) cannot be obtained.

In this case, the parallel line is obtained by using the coordinate data of the designated point E which is the next line drawing data. On the other hand, a perpendicular line is lowered from each designated point, and the intersection is defined as the side groove line. It is a feature point. Further, following step (55), the following processing is performed.

(56) As “(j + 1) → j”, proceed to the next step. (57) It is determined whether or not the flag remains set to “0”. If “YES”, the process proceeds to the next step, and if “NO”, the process proceeds to step (72). Here, in the latter case, the process proceeds to the end point designated point E. (58) As “f ₁ (x, y) → f _OLD (x, y)”, proceed to the next step. (59) _Set “x _i → x _OLD , y _i → y _OLD ” and proceed to the next step. (60) As “(i + 1) → i”, proceed to the next step. (61) line drawing record Karade of the sidewalk line 16 - line drawing data (x _i, y _i) of the data number "i" by calling, proceed to the next step. (62) as "x _i → x _C", proceed to the next step. (63) determines whether the "x _i = -512 or x _i = -1024," in the case of "YES", the flow proceeds to the next step,
If "NO", the flow proceeds to step (66). In the former case, the side groove line creation processing ends with the next line drawing data (coordinate data of the designated point E). (64) The flag is set to “1” and “(i + 1) → i”
And proceed to the next step. (65) line drawing record Karade sidewalk line 16 - line drawing data (x _i, y _i) of the data number "i" by calling, the process proceeds to the next step. (66) f ₁ (x, y) is calculated in the same manner as in step (54), and the flow advances to the next step. _{(67) f OLD (x,} y) the slope of a _OLD and f ₁ (x, y) in search of a gradient a ₁ in, proceed to the next step. (68) It is determined whether or not the difference between the respective gradients is equal to or more than a predetermined value, and if “YES”, the process proceeds to the next step and “NO”.
If so, go to step (70). Specifically, (a ₁
−a _OLD ) / a _OLD is a predetermined value, for example, “0.001
Is greater than or equal to. (69) The solution of two equations of f _OLD (x, y) = 0 and f ₁ (x, y) = 0 is obtained, and the solution is drawn to the line drawing data (j) of the line drawing record of the side groove line ( X _j , Y _j ) and return to step (56). (70) The value of y obtained when “x = x _OLD ” in the equation of f ₁ (x, y) = 0 is set as Y _j , and the process proceeds to the next step.
F _OLD (x, y) = 0 may be used instead of f ₁ (x, y) = 0. (71) _Set “x _OLD = X _j ” and return to step (56).

According to the above-described processing procedure, the gutter line creation processing is sequentially performed on each feature point of the sidewalk line 16 from the feature point next to the designated point S to the feature point immediately before the designated point E, and step ( 56) If the determination result is “NO”, that is, the designated point E
At the stage where the parallel line creation up to this point and the intersection calculation process between the parallel line and the preceding parallel line are completed, the following processing is performed.

(72) The coordinates (x) of the intersection of the perpendicular drawn from the designated point E (x _i , y _i ) to the parallel line “f ₁ (x, y) = 0”
_H , y _H ) to obtain “x _H → X _j , y _H → Y _j ”,
Proceed to the next step. (73) Determine whether or not “x _C = −512”, and select “YES”.
If "", proceed to the next step, and if "NO", proceed to step (76). (74) As “(j + 1) → j”, proceed to the next step. (75) _{"x i → X j, y i} → Y j " as, proceed to the next step. (76) The value of "j" is entered in the data number area of the line drawing record of the side groove line.

The last feature point of the side groove line 17 is calculated by the processing of these steps (72) to (75), and when "connection" is designated as the end point processing, the designated point is added after this feature point. A line drawing record (of the side groove line) to which the coordinate data of E is added is created.

Then, the value of "j" obtained in step (76) is as follows in the case of the pedestrian line 16 in FIG. 2: When "open" is designated as the end point processing,
Point S-Feature point [26]-Feature point [27]---Feature point [8
8] -The number of feature points on the gutter line corresponding to each of the designated points E is "65". When "connection" is designated as the end point processing, the designated points S and E are added to this. "67", and a line drawing record composed of these numbers of coordinate data is stored in the gutter line layer.

FIG. 15 shows steps (54) and (66).
FIG. 16 is an explanatory diagram showing a process of inducing a parallel line “f ₁ (x, y) = 0” of FIG. FIG.

The designated point D corresponds to a case where a digitizer is input to the left of the sidewalk line vector L of the processing target section, and the designated point D 'corresponds to a case where a digitizer is input to the right of the sidewalk line vector L. Sidewalk line vector L
Is, for example, about a sidewalk segment closest to the designated points D and D '(a line connecting adjacent feature points on the sidewalk line).

Here, the translation distance b between the sidewalk line vector L and the parallel line L 'in FIG. 15 and the distance 1 in the y-axis direction between the sidewalk line vector L and the designated points D and D' in FIG. Both are positive values, and whether Z in the equation of the parallel line L 'is "+1" or "-1" is uniquely determined by the positional relationship between the designated points D and D' and the sidewalk line vector L. .

That is, as is apparent from FIG. 16, when f (x, y) is obtained for the designated point D, it always becomes a negative number,
When f (x, y) is obtained for the designated point D ', it always becomes a positive number, and this sign is used as the value of Z. In addition,

Therefore, the operator can specify the designated points D and D '.
Is input by the digitizer, the sign of Z is determined by the calculation in FIG. 16, and as a result, “f ₁ (x, y) = 0” in FIG. 15 is calculated for each arbitrary pedestrian line vector L in the processing target section. Thus, the gutter line vector is sequentially obtained on either the right or left side of the sidewalk line.

[0052]

As described above, according to the present invention, the vector data in which the line drawing data (coordinate data and the attribute data indicating the display state of the next feature point as it is) of each feature point are arranged according to the respective arrangement order. For the graphic display line such as the sidewalk line represented by the line drawing record of the format, the one side parallel line such as the gutter line is created on which side of the figure display line, and the created section and the end point of the one side parallel line The operator inputs from the digitizer etc. whether or not to connect to the display line,
One-sided parallel lines are automatically created based on these input data and the line drawing data.

Therefore, when creating a parallel line on one side of an arbitrary section of the already input graphic display line, labor can be saved and the processing time required for manual processing can be reduced, and an accurate parallel line on one side can be created. Can be created.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram showing a drawing example in which a one-side parallel line creation section and the like are specified according to the present invention;

FIG. 3 is an explanatory diagram showing a line drawing record of a sidewalk line in FIG. 2;

FIG. 4 is an explanatory diagram showing a state in which line drawing data of designated points S and E are added to the line drawing record of FIG. 3;

FIG. 5 is an explanatory diagram showing the contents of each attribute data of a line drawing record according to the present invention.

6 is an explanatory diagram showing a drawing in which a gutter line is created outside the sidewalk line of FIG. 2 based on the line drawing record of FIG. 4;

FIG. 7 is an explanatory diagram showing a drawing in which a line drawing record is set for each of the sidewalk line of FIG. 2 divided into a first half part and a second half part.

8 is an explanatory diagram showing a state in which line drawing data of designated points S and E are added to the line drawing record of the first half of the sidewalk line in FIG. 7;

FIG. 9 is an explanatory diagram (part 1) illustrating a processing procedure when a gutter line is created between designated points S and E of a sidewalk line according to the present invention.

FIG. 10 is an explanatory diagram (part 2) illustrating a processing procedure when creating a gutter line between designated points S and E of a sidewalk line according to the present invention.

FIG. 11 is an explanatory diagram showing a subroutine used in step (16) and step (19).

FIG. 12 is an explanatory diagram (part 1) illustrating a sub-groove line creation subroutine used in step (21).

FIG. 13 is an explanatory diagram (part 2) showing a sub-groove line creating subroutine used in step (21).

FIG. 14 is an explanatory view (No. 3) showing a sub-groove line creating subroutine used in step (21).

FIG. 15 is an explanatory diagram showing a process of inducing a parallel line “f ₁ (x, y) = 0” in steps (54) and (66).

16 is an explanatory diagram showing a process of calculating a creation side of the parallel line “f ₁ (x, y) = 0” in FIG. 15 from a sidewalk line vector L and designated points D and D ′.

FIG. 17 is an explanatory diagram showing an outline of hardware when a general computer is used to create and correct various drawings using a computer.

FIG. 18 is an explanatory diagram showing a general format of a graphic display line and its line drawing record.

FIG. 19 is an explanatory diagram showing the contents of each attribute data of a line drawing record in the related art.

[Explanation of symbols]

 In FIG. 1, 1 ... a part of the drawing after the creation of one-sided parallel lines 2 ... storage device 3 ... input unit 4 ... application program 11 ... graphic display line 12 ... one-side parallel line

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 17/50 606

Claims (6)

(57) [Claims] 2. The method of claim 1, further comprising the steps of :
Data format showing data in the order of the feature points
Of the parallel line on one side of the display line based on the line drawing record
In a one-sided parallel line automatic creation system for finding fixed data
Te, interval fingers of the display line indicating the creation interval of the one-side parallel lines
Mark, outside of the above-mentioned display line indicating the side of creation of the one-side parallel line
Position data of each side indication point of the above, and the display
Using the position data of each feature point of the line,
From the indicated point to the other section indicating point via the feature point
A straight line specified by the position data of adjacent neighbors until
Formula of a parallel line separated by a predetermined length toward the creation side
First intersection point for each parallel line between adjacent ones
And calculating the position data of the calculated first intersection with one of the
From the start point corresponding to the section designated point to the other section designated point
Follow the order of the feature points until the end point
One-sided flattened to generate the identification data by linking in a manner
One parallel line automatic creation system, characterized in that it and a row line data generating means
M 2. The method according to claim 1, wherein the intersection calculating means calculates the first parallel line.
And the one section for each of the last parallel lines
From each of the designated points and the other section designated points.
The second and third intersections when the line is lowered are calculated, and the one-side parallel line data generating means calculates the second and third intersections .
And the third intersection is used as the start point and the end point
And the position data of the intersection and the section point.
2. The one-sided parallel line automatic creation system according to claim 1 , wherein the data is connected as elements of the identification data.
Stem. 3. The method according to claim 2, wherein the intersection calculation means calculates the position of the parallel
If the slopes of the lines are almost the same,
From the feature point on which the line is calculated,
Calculate the fourth intersection when dropping the perpendicular to either
That, on one side parallel lines according to claim 1 or 2, wherein the self
Dynamic creation system. 4. The position data of a plurality of feature points for specifying a display line.
Data format showing data in the order of the feature points
Of the parallel line on one side of the display line based on the line drawing record
In the one-sided parallel line automatic creation method for obtaining fixed data, an intersection calculation means indicates a creation section of the one-sided parallel line.
Section designation points on the display line and the size of the parallel line
The position data of each side indication point outside the display line
Data and the position data of each feature point of the display line.
From one of the section indication points via the feature point to the other
The position data of the neighbors up to the section designated point
Is a predetermined length from the straight line specified by the
Obtain the formulas for the parallel lines that are far apart, and
A first intersection for each row line is calculated, and the first intersection is calculated by one-sided parallel line data generation means.
The starting point corresponding to one of the section designated points
From the end to the end point corresponding to the other section designated point
The feature points are linked in a manner that follows the
A method for automatically creating one-sided parallel lines, characterized by generating regular data . 5. The method according to claim 1, wherein the intersection calculating means calculates the first flat area.
One for each of the row line and the last parallel line
Each of the section indication points of the above and the other section indication points
The second and third intersections when the perpendicular is lowered are calculated, and the one-side parallel line data generating means calculates the second and third intersections.
When a third intersection is used as the start point and the end point
In addition, each position data of the intersection and the section indication point is
5. The method for automatically creating one-sided parallel lines according to claim 4, wherein the one-sided parallel lines are connected as elements of the identification data.
Law. 6. The method according to claim 1, wherein the intersection calculation means calculates the intersection of
If the inclinations of the parallel lines are substantially the same,
From the feature point on which the parallel line is calculated,
Calculate the fourth intersection when a perpendicular is dropped on any of the lines
To one side parallel lines according to claim 4 or 5, wherein the self
Dynamic creation method.