CN111223184A - Target curve drawing method and device - Google Patents
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- CN111223184A CN111223184A CN201911139151.4A CN201911139151A CN111223184A CN 111223184 A CN111223184 A CN 111223184A CN 201911139151 A CN201911139151 A CN 201911139151A CN 111223184 A CN111223184 A CN 111223184A
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Abstract
The invention provides a method and a device for drawing a target curve, and relates to the technical field of curve drawing. The method for drawing the target curve comprises the following steps: in the current drawing area, if the line drawing operation input by the user is monitored, generating a corresponding line according to the line drawing operation; when an end signal of line drawing operation is monitored, a line is taken as a datum line, and a buffer zone containing the datum line is generated, wherein the buffer zone extends along the length direction of the datum line, and the boundary of the buffer zone is parallel to the datum line; and extracting the boundary curve of the buffer area, and determining the boundary curve as a target curve. According to the method and the device for drawing the target curve, after the end signal of the line drawing operation is monitored, the determination process of the target curve can be automatically carried out, so that the working efficiency is improved, and the drawing precision of the target curve is ensured.
Description
Technical Field
The invention relates to the technical field of curve drawing, in particular to a method and a device for drawing a target curve.
Background
At present, the existing drawing software brings great convenience to work and life of people, but the existing drawing software can only carry out simple curve drawing operation and cannot carry out continuous drawing, so that the existing drawing software can not meet the requirements of working efficiency and drawing accuracy far away.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for drawing a target curve, so as to improve the technical problem that the existing drawing software can only perform a simple curve drawing operation but cannot perform continuous drawing.
In a first aspect, an embodiment of the present invention provides a method for drawing a target curve, where the method includes the following steps:
in the current drawing area, if the line drawing operation input by a user is monitored, generating a corresponding line according to the line drawing operation;
when an ending signal of the line drawing operation is monitored, the line is taken as a datum line, and a buffer area containing the datum line is generated, wherein the buffer area extends along the length direction of the datum line, and the boundary of the buffer area is parallel to the datum line;
and extracting a boundary curve of the buffer area, and determining the boundary curve as a target curve.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the step of generating a buffer area including the reference line by using the line as the reference line includes:
respectively generating parallel lines of the datum line on two sides of the datum line by taking the line as the datum line;
generating a buffer area containing the datum line by taking the parallel line as a boundary; and the area between the parallel lines on the two sides of the datum line is the area of the buffer area.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the step of generating parallel lines of the reference line on two sides of the reference line respectively includes:
parallel lines with the same distance with the datum line are respectively generated on the two sides of the datum line;
or parallel lines with a preset distance from the reference line are respectively generated on two sides of the reference line.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the step of generating a buffer area including the reference line by using the line as the reference line includes:
generating a parallel line of the datum line on one side of the datum line according to a preset distance by taking the line as the datum line;
generating a buffer area containing the reference line by taking the parallel line and the reference line as boundaries; and the area between the reference line and the parallel line is the area of the buffer area.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where after the generating a buffer area including the reference line, the method further includes:
and cutting two ends of the buffer area according to the reference line to generate cutting lines so as to set the buffer area into a closed area.
With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the step of extracting a boundary curve of the buffer area and determining the boundary curve as a target curve includes:
acquiring a deleting operation input by the user, and deleting a reference line and a filling surface of the closed area included in the closed area according to the deleting operation;
and when the end signal of the deleting operation is monitored, determining the residual boundary curve as a target curve.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the method further includes:
judging whether the reference line has an inflection point;
if so, acquiring the coordinates of each inflection point;
and carrying out smoothing treatment on the boundary curve of the buffer area based on the coordinates of the inflection points.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the method further includes:
judging whether the datum line has a cross point;
if so, collecting the coordinates of the intersection point;
when a buffer including the reference line is generated, the buffer is fused at a position corresponding to the coordinates of the intersection.
With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, where the method further includes:
and performing elevation processing on the target curve to obtain a target curved surface corresponding to the target curve.
In a second aspect, an embodiment of the present invention further provides an apparatus for drawing a target curve, where the apparatus includes:
the line generating module is used for generating a corresponding line according to the line drawing operation if the line drawing operation input by the user is monitored in the current drawing area;
the line drawing device comprises a buffer area generating module, a line drawing module and a line drawing module, wherein the buffer area generating module is used for generating a buffer area containing a reference line by taking the line as the reference line when monitoring a finish signal of the line drawing operation, the buffer area extends along the length direction of the reference line, and the boundary of the buffer area is parallel to the reference line;
and the boundary curve extraction module is used for extracting the boundary curve of the buffer area and determining the boundary curve as a target curve.
In a third aspect, an embodiment of the present invention further provides a server, where the server includes: a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method described above.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the method described above.
The embodiment of the invention has the following beneficial effects: according to the method and the device for drawing the target curve, provided by the embodiment of the invention, when the line drawing operation input by a user is monitored, a corresponding line can be generated according to the line drawing operation; when an ending signal of line drawing operation is monitored, a buffer area containing a reference line is generated by taking the line as the reference line; and extracting the boundary curve of the buffer area, and determining the boundary curve as a target curve, wherein after a finish signal of line drawing operation is monitored, the determination process of the target curve can be automatically carried out, so that the working efficiency is improved, and the drawing precision of the target curve is also ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for drawing a target curve according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for plotting a target curve according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for plotting a target curve according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for plotting a target curve according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for drawing a target curve according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Nowadays, the existing drawing software (such as ArcGis drawing software, a GIS (geographic information system) platform) is applied to various aspects of people's work and life, which brings great convenience to people, and has great advantages in data processing, library building and warehousing, but the existing drawing software still has the following disadvantages: (1) only simple curve drawing operation can be carried out, but continuous drawing cannot be carried out; (2) the turning point can not be smooth; (3) the width between the two lines cannot be fixed when the parallel lines are drawn; (4) most of the work needs to be completed manually. These disadvantages make the existing drawing software far from meeting the requirements of work efficiency and drawing accuracy. Accordingly, embodiments of the present invention provide a method and an apparatus for drawing a target curve to alleviate the above problems.
In order to facilitate understanding of the embodiment, a method for drawing a target curve disclosed in the embodiment of the present invention is first described in detail.
In one possible embodiment, the present invention provides a method for plotting a target curve. Fig. 1 is a flow chart of a method for plotting a target curve, the method comprising the steps of:
step S102: and in the current drawing area, if the line drawing operation input by the user is monitored, generating a corresponding line according to the line drawing operation.
The drawing area is generally a drawing area in drawing software displayed on a display interface, specifically, the display interface is generally a display interface of an intelligent terminal, and the intelligent terminal can be a smart phone, a tablet computer, a desktop computer, a handheld computer, and the like, so that a user can draw a line in the drawing area of the drawing software according to a plug-in of the drawing software.
Further, the line drawing operation may be input by a user on the drawing area through an input device of the smart terminal, such as a keyboard, a mouse, and the like, and for the smart terminal with a touch screen, the line drawing operation may also be input in a touch manner.
Step S104: and when the ending signal of the line drawing operation is monitored, generating a buffer area containing the reference line by taking the line as the reference line.
The buffer area extends along the length direction of the datum line, and the boundary of the buffer area is parallel to the datum line.
Further, the reference line is typically a meander curve.
Step S106: and extracting a boundary curve of the buffer area, and determining the boundary curve as a target curve.
The embodiment of the invention has the following beneficial effects: according to the method for drawing the target curve, when the line drawing operation input by a user is monitored, the corresponding line can be generated according to the line drawing operation; when an ending signal of line drawing operation is monitored, a buffer area containing a reference line is generated by taking the line as the reference line; and extracting the boundary curve of the buffer area, and determining the boundary curve as a target curve, wherein after a finish signal of line drawing operation is monitored, the determination process of the target curve can be automatically carried out, so that the working efficiency is improved, and the drawing precision of the target curve is also ensured.
In practical use, in the process of generating a buffer area including a reference line, it is necessary to first generate parallel lines of the reference line, and then generate the buffer area with the parallel lines as boundaries, so in order to describe in more detail the step of generating the buffer area including the reference line, an embodiment of the present invention shows a flowchart of another method for drawing a target curve in fig. 2, where the method includes the following steps:
step S202: and in the current drawing area, if the line drawing operation input by the user is monitored, generating a corresponding line according to the line drawing operation.
The user draws a line by using a rubber band, and the rubber band can realize the following line drawing process by taking a mouse as an input device to input in a drawing area as an example:
(1) clicking a left button in a drawing area by using a mouse to determine a starting point of a line, changing the length and the direction of the line by moving the mouse, and double-clicking the left button of the mouse to bundle the line drawing operation;
(2) clicking a middle key in the middle of a mouse to move a bottom map of a drawing area;
(3) and stopping moving the base map, continuing to draw the line in the upper segment, repeating the operation for a plurality of times, and finally, double-clicking the left key of the mouse to restrain the whole line drawing operation.
Further, after the user finishes the whole line drawing operation, the line drawing operation is input to the computer, and the computer generates a corresponding line according to the line drawing operation.
Step S204: and when the end signal of the line drawing operation is monitored, parallel lines with the same distance with the reference line are respectively generated on the two sides of the reference line.
When the user finishes the whole line drawing operation and inputs the line drawing operation into the computer, the user can input a line drawing finishing operation instruction into the computer, and the computer starts the automatic continuous line drawing operation when receiving the line drawing finishing operation instruction.
After the automatic continuous line drawing operation is started, the computer respectively generates parallel lines with the same distance with the reference line on two sides of the reference line by taking the reference line as a reference; alternatively, a distance may be set in advance as a distance between the reference line and the parallel line to be generated, and then parallel lines having a distance from the reference line of a predetermined distance may be generated on both sides of the reference line.
It should be particularly noted that, in the process of generating the parallel lines with the reference line as the reference, it is only required to ensure that the distances between the reference line and the two parallel lines are equal, and the embodiment of the present invention does not limit the manner of achieving the distances.
Step S206: and generating a buffer area containing the datum line by taking the parallel line as a boundary.
The area between the parallel lines on the two sides of the datum line is the area of the buffer area.
Further, the buffer area including the reference line may also be generated by using the line as the reference line in the following manner: generating a parallel line of the reference line on one side of the reference line according to a preset distance by taking the line as the reference line; and taking the parallel lines and the reference lines as boundaries to generate a buffer area containing the reference lines.
Step S208: and extracting a boundary curve of the buffer area, and determining the boundary curve as a target curve.
After the buffer area is generated, usually, the head and the tail of the buffer area will have arc-shaped areas, which need to be cut, so in order to describe the process of cutting the head and the tail in more detail, specifically, the embodiment of the present invention shows a flow chart of another method for plotting a target curve in fig. 3, which includes the following steps:
step S302: and in the current drawing area, if the line drawing operation input by the user is monitored, generating a corresponding line according to the line drawing operation.
Step S304: and when the end signal of the line drawing operation is monitored, parallel lines with the same distance with the reference line are respectively generated on the two sides of the reference line.
Step S306: and generating a buffer area containing the datum line by taking the parallel line as a boundary.
Step S308: and cutting two ends of the buffer area according to the reference line to generate cutting lines so as to set the buffer area into a closed area.
Under a normal condition, an arc-shaped area can appear at the head and the tail of the buffer area generated based on the reference line, and the head and the tail are required to be straight angles in practice, so that the head and the tail are required to be cut by the reference line perpendicular to the head and the tail of the buffer area, two cutting lines perpendicular to the reference line are obtained at the head and the tail of the buffer area, and the buffer area is surrounded by the two cutting lines and the two parallel lines to form a closed area.
Step S310: and extracting a boundary curve of the buffer area, and determining the boundary curve as a target curve.
After the line drawing operation is input into the computer and before the boundary curve of the buffer area is extracted, the computer detects a datum line and judges whether the datum line has an inflection point and an intersection point respectively:
(1) judging whether the reference line has an inflection point; if so, acquiring the coordinates of each inflection point; and based on the coordinates of the inflection points, rounding the boundary curve of the buffer area.
The position where the double-click mouse left key is used for binding a segment of the drawn line is usually the inflection point of the boundary curve.
(2) Judging whether the datum line has a cross point; if so, collecting the coordinates of the intersection point; when a buffer including the reference line is generated, the buffer is fused at a position corresponding to the coordinates of the intersection.
In practical use, after the buffer area is set as a closed area, and in the process of extracting the boundary curve of the buffer area, other lines or areas except the boundary curve need to be deleted to obtain a final target curve, so for a more detailed description of the step of extracting the boundary curve of the buffer area, an embodiment of the present invention shows a flowchart of another method for drawing a target curve in fig. 4, where the method includes the following steps:
step S402: and in the current drawing area, if the line drawing operation input by the user is monitored, generating a corresponding line according to the line drawing operation.
Step S404: and when the end signal of the line drawing operation is monitored, parallel lines with the same distance with the reference line are respectively generated on the two sides of the reference line.
Step S406: and generating a buffer area containing the datum line by taking the parallel line as a boundary.
Step S408: and cutting two ends of the buffer area according to the reference line to generate cutting lines so as to set the buffer area into a closed area.
Step S410: and acquiring a deleting operation input by the user, and deleting a datum line and a filling surface of the closed area included in the closed area according to the deleting operation.
Wherein only the boundary curve remains in the entire current drawing area after the reference line included in the closed area and the fill face of the closed area are deleted.
Step S412: and when the end signal of the deleting operation is monitored, determining the residual boundary curve as a target curve.
After the target curve is obtained, performing elevation processing on the target curve to obtain a target curved surface corresponding to the target curve. Specifically, the elevation refers to a distance from a certain point to an absolute base surface along a plumb line direction, and a process of performing elevation processing, that is, a process of converting from two dimensions to three dimensions, is a process of converting from a target curve to a corresponding curved surface in the embodiment of the present invention.
In summary, in the process of drawing the target curve, after the end signal of the line drawing operation is monitored, the method and the device for drawing the target curve can automatically determine the target curve, so that the working efficiency is improved, and the drawing precision of the target curve is ensured.
In another possible implementation manner, corresponding to the method for drawing a target curve provided in the foregoing implementation manner, an embodiment of the present invention further provides a device for drawing a target curve, and fig. 5 is a schematic structural diagram of the device for drawing a target curve provided in the embodiment of the present invention. As shown in fig. 5, the apparatus includes:
the line generating module 501 is configured to, in a current drawing area, if a line drawing operation input by a user is monitored, generate a corresponding line according to the line drawing operation;
a buffer area generating module 502, configured to generate a buffer area including the reference line by using the line as the reference line when an end signal of the line drawing operation is monitored, where the buffer area extends along a length direction of the reference line, and a boundary of the buffer area is parallel to the reference line;
and a boundary curve extracting module 503, configured to extract a boundary curve of the buffer, and determine the boundary curve as a target curve.
The drawing device of the target curve provided by the embodiment of the invention has the same technical characteristics as the drawing method of the target curve provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of plotting a target curve, the method comprising the steps of:
in the current drawing area, if the line drawing operation input by a user is monitored, generating a corresponding line according to the line drawing operation;
when an ending signal of the line drawing operation is monitored, the line is taken as a datum line, and a buffer area containing the datum line is generated, wherein the buffer area extends along the length direction of the datum line, and the boundary of the buffer area is parallel to the datum line;
and extracting a boundary curve of the buffer area, and determining the boundary curve as a target curve.
2. The method of claim 1, wherein the step of generating a buffer containing the reference line using the line as the reference line comprises:
respectively generating parallel lines of the datum line on two sides of the datum line by taking the line as the datum line;
generating a buffer area containing the datum line by taking the parallel line as a boundary; and the area between the parallel lines on the two sides of the datum line is the area of the buffer area.
3. The method of claim 2, wherein the step of generating parallel lines of the reference line on either side of the reference line comprises:
parallel lines with the same distance with the datum line are respectively generated on the two sides of the datum line;
or parallel lines with a preset distance from the reference line are respectively generated on two sides of the reference line.
4. The method of claim 1, wherein the step of generating a buffer containing the reference line using the line as the reference line comprises:
generating a parallel line of the datum line on one side of the datum line according to a preset distance by taking the line as the datum line;
generating a buffer area containing the reference line by taking the parallel line and the reference line as boundaries; and the area between the reference line and the parallel line is the area of the buffer area.
5. The method of claim 1, wherein after the generating a buffer containing the baseline, the method further comprises:
and cutting two ends of the buffer area according to the reference line to generate cutting lines so as to set the buffer area into a closed area.
6. The method of claim 5, wherein extracting a boundary curve of the buffer and determining the boundary curve as a target curve comprises:
acquiring a deleting operation input by the user, and deleting a reference line and a filling surface of the closed area included in the closed area according to the deleting operation;
and when the end signal of the deleting operation is monitored, determining the residual boundary curve as a target curve.
7. The method of claim 1, wherein prior to said extracting the boundary curve of the buffer, the method further comprises:
judging whether the reference line has an inflection point;
if so, acquiring the coordinates of each inflection point;
and carrying out smoothing treatment on the boundary curve of the buffer area based on the coordinates of the inflection points.
8. The method of claim 1, wherein prior to said extracting the boundary curve of the buffer, the method further comprises:
judging whether the datum line has a cross point;
if so, collecting the coordinates of the intersection point;
when a buffer including the reference line is generated, the buffer is fused at a position corresponding to the coordinates of the intersection.
9. The method of claim 1, further comprising:
and performing elevation processing on the target curve to obtain a target curved surface corresponding to the target curve.
10. An apparatus for plotting a target curve, the apparatus comprising:
the line generating module is used for generating a corresponding line according to the line drawing operation if the line drawing operation input by the user is monitored in the current drawing area;
the line drawing device comprises a buffer area generating module, a line drawing module and a line drawing module, wherein the buffer area generating module is used for generating a buffer area containing a reference line by taking the line as the reference line when monitoring a finish signal of the line drawing operation, the buffer area extends along the length direction of the reference line, and the boundary of the buffer area is parallel to the reference line;
and the boundary curve extraction module is used for extracting the boundary curve of the buffer area and determining the boundary curve as a target curve.
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| CN201911139151.4A CN111223184A (en) | 2019-11-19 | 2019-11-19 | Target curve drawing method and device |
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| CN201911139151.4A CN111223184A (en) | 2019-11-19 | 2019-11-19 | Target curve drawing method and device |
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