CN108053751A - A kind of method and apparatus that direction arrow is drawn on navigation of electronic map route - Google Patents
A kind of method and apparatus that direction arrow is drawn on navigation of electronic map route Download PDFInfo
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- CN108053751A CN108053751A CN201711483200.7A CN201711483200A CN108053751A CN 108053751 A CN108053751 A CN 108053751A CN 201711483200 A CN201711483200 A CN 201711483200A CN 108053751 A CN108053751 A CN 108053751A
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- control point
- direction arrow
- navigation
- navigation routine
- path
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/003—Maps
- G09B29/006—Representation of non-cartographic information on maps, e.g. population distribution, wind direction, radiation levels, air and sea routes
- G09B29/008—Touring maps or guides to public transport networks
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ecology (AREA)
- Mathematical Physics (AREA)
- Business, Economics & Management (AREA)
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- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Navigation (AREA)
Abstract
The present invention provides the method and apparatus that direction arrow is drawn on a kind of navigation of electronic map route, belongs to intelligent mobile application field.The described method includes：Draw the shape vector of direction arrow；Calculate the shape vector of the direction arrow and the offset of navigation of electronic map route；According to the offset, the direction arrow is drawn on the electronic map along navigation routine.For this programme by path drawing into the shape vector of needs, such as arrowhead form, this method uses Android primary method, without picture and other resources, simply, reliably.
Description
Technical field
The present invention relates to intelligent mobile application fields, and in particular to draws direction arrow on a kind of navigation of electronic map route
Method and apparatus.
Background technology
, it is necessary to which the arrow drawn on navigation routine is directed toward icon in map development process, it is common practice to use arrow
The picture of head shapes is plotted in a manner of Bitmap bitmaps on navigation routine.
But this method, there are drawback, the memory that not only Bitmap is occupied is excessive, causes memory overhead excessive, and
Bitmap can bring and render performance issue.
The content of the invention
An embodiment of the present invention provides the method and apparatus that direction arrow is drawn on a kind of navigation of electronic map route, are pacifying
The path pattern of navigation routine during tall and erect drawing path can be set, closed path shape can be drawn using path.It should
Method uses Android primary method, without picture and other resources, simply, reliably.
On the one hand, the present invention provides a kind of method that direction arrow is drawn on navigation of electronic map route, the method bag
It includes：
Draw the shape vector of direction arrow；
Calculate the shape vector of the direction arrow and the offset of navigation of electronic map route；
According to the offset, the direction arrow is drawn on the electronic map along navigation routine.
On the other hand, the present invention also provides the device that direction arrow is drawn on a kind of navigation of electronic map route, the dresses
It puts including determining vector module, computing module and drafting module；
The definite vector module, for drawing the shape vector of direction arrow；
The computing module, for calculating the offset of the shape vector of the direction arrow and navigation of electronic map route
Amount；
The drafting module, for the offset obtained according to the computing module, along navigation routine described
The direction arrow is drawn on electronic map.
It has the beneficial effect that：
The scheme that this programme provides, by path drawing into the shape vector of needs, such as arrowhead form, this method uses Android
Native method, without picture and other resources, simply, reliably.In addition interval can also be set, while navigation routine is drawn
This shape is drawn once again along navigation routine drawing path.
Description of the drawings
Specific embodiments of the present invention are described below with reference to accompanying drawings, wherein：
Fig. 1 shows the method flow diagram for drawing direction arrow in the embodiment of the present invention one on navigation of electronic map route；
Fig. 2 shows the schematic diagram at six control points in the embodiment of the present invention one；
Fig. 3 shows the schematic diagram that offset is calculated in the embodiment of the present invention one；
Fig. 4 shows the apparatus structure signal for drawing direction arrow in the embodiment of the present invention two on navigation of electronic map route
Figure.
Specific embodiment
In order to which technical scheme and advantage is more clearly understood, below in conjunction with attached drawing to the exemplary of the present invention
Embodiment is described in more detail, it is clear that described embodiment be only the present invention part of the embodiment rather than
The exhaustion of all embodiments.And in the case where there is no conflict, the feature in the embodiment and embodiment in this explanation can be mutual
It is combined.
Embodiment one
Fig. 1 shows the method that direction arrow is drawn on navigation of electronic map route provided in an embodiment of the present invention, described
Method includes：
Step 101：Draw the shape vector of direction arrow；
Wherein, the step the specific implementation process is as follows：
Two endpoints of the path length of navigation routine are obtained, as the first control point 1 and the second control point 2；
The path width of navigation routine is obtained, second control point 2 is the path length and the path width
Crosspoint；
By the crosspoint of another a line on the path width of the navigation routine and path, as the 3rd control point 3；
Another a line obtains the 4th control point 4 on the path, and the 4th control point 4 is another article on the path
The endpoint on side；
First control point and the straight line that the 4th control point 4 is formed and second control point 2 and the described 3rd
The straight line parallel that control point is formed；
The 6th control point 6 is generated between first control point 1 and the 4th control point 4；
The 5th control point 5 is generated between second control point 2 and the 3rd control point 3；
The figure formed between six control points, for the shape vector for the direction arrow drawn out, six controls
System point includes the first control point, the second control point, the 3rd control point, the 3rd control point, the 4th control point, the 5th control point and the
Six control points.
Wherein, the straight line that the 6th control point 6 and the first control point 1 are formed, with 2 structure of the 5th control point 5 and the second control point
Into straight line parallel；
Or, the 6th straight line for forming of control point 6 and the 4th control point 4, it is formed with the 5th control point 5 with the 3rd control point 3
Straight line parallel.
Wherein, the shape vector drawn of the present invention can be seen as shown in Fig. 2, the shape of arrow is made of six control points
Work is similar triangles (and two triangles that two (the small length of side for navigation navigation routine line width) bases of different sizes overlap
The abscissa on the vertex of shape is identical), make vertical line and larger triangle then along two points on the base of smaller triangle
The intersection point on two sides of shape, in addition two points of two vertexs of a triangle and smaller triangle base, what this six points were formed
Closed figure is icon shape.
Step 102：Calculate the shape vector of direction arrow and the offset of navigation of electronic map route；
For the step, calculating the specific method of offset includes：Calculate in navigation routine between two central points away from
From the distance is offset；By the abscissa at six control points, the offset is subtracted, obtains new coordinate；To be sat according to new
Arrow is plotted in along navigation routine on the electronic map by mark.
Referring to Fig. 3, since the path of arbitrary shape is the point centered on the transverse and longitudinal coordinate of string, the origin corresponding to shape
And this point, it is only necessary to calculate the distance that arrowhead form point 2 arrives y-axis, be overall offset amount, the six of arrow vector will be formed
The abscissa of a point subtracts this offset, then arrowhead form will be fitted in above.
Step 103：According to offset, direction arrow is drawn on the electronic map along navigation routine.
In addition, the present invention also provides it is a kind of by path drawing into the shape vector of needs, after arrowhead form, Ran Houshe
Interval is put, draws this shape once again along navigation routine drawing path while navigation routine is drawn.
Specifically, along the direction of the shape vector, the direction arrow is drawn every a distance on navigation routine
Head.
Scheme provided by the invention, by path drawing into the shape vector of needs, such as arrowhead form, this method uses Android
Native method, without picture and other resources, simply, reliably.In addition interval can also be set, while navigation routine is drawn
This shape is drawn once again along navigation routine drawing path.
Embodiment two
Based on same inventive concept, the dress that direction arrow is drawn on a kind of navigation of electronic map route is present embodiments provided
It puts, principle and a kind of navigation of electronic map route that the device of direction arrow solves the problems, such as is drawn on the navigation of electronic map route
The method of upper drafting direction arrow is similar, therefore device implementation for drawing direction arrow on the electronic map may refer to one kind
The method embodiment of direction arrow is drawn on navigation of electronic map route, overlaps will not be repeated.
With reference to Fig. 4, to drawing the device of direction arrow, institute on a kind of navigation of electronic map route provided by the invention
Stating device includes determining vector module 301, computing module 302 and drafting module 303；
Vector module 301 is determined, for drawing the shape vector of direction arrow；
Computing module 302, for calculating the offset of the shape vector of the direction arrow and navigation of electronic map route；
Drafting module 303, for the offset obtained according to computing module 302, along navigation routine in the electricity
The direction arrow is drawn on sub- map.
Wherein, drafting module 303 specifically include first acquisition unit, second acquisition unit and the 3rd acquiring unit,
The first acquisition unit, for obtaining the two of the path length of the navigation routine endpoints, as the first control
System point and the second control point, and obtain the path width of the navigation routine, second control point for the path length and
The crosspoint of the path width；
The second acquisition unit, for the path width of the navigation routine and another a line on path to be intersected
Point, as the 3rd control point, and another a line obtains the 4th control point on the path, and the 4th control point is the road
The endpoint of another a line on footpath；The straight line that first control point and the 4th control point are formed and second control point with
The straight line parallel that 3rd control point is formed；
3rd acquiring unit, for the 6th control of generation between first control point and the 4th control point
Point generates the 5th control point between second control point and the 3rd control point；
The figure formed between six control points, for the shape vector for the direction arrow drawn out, six controls
System point includes the first control point, the second control point, the 3rd control point, the 3rd control point, the 4th control point, the 5th control point and the
Six control points.
Further, in the present invention, the 6th control point and the straight line of the first control point composition, with the 5th control point and second
The straight line parallel that control point is formed；
Or, the 6th straight line for forming of control point and the 4th control point, it is formed with the 5th control point with the 3rd control point straight
Line is parallel.
Wherein, computing module 302 specifically includes：Calculate the distance between two central points, the distance in navigation routine
For offset, by the abscissa at six control points, the offset is subtracted, obtains new coordinate；
Correspondingly, drafting module 303, for according to the new coordinate that the computing module obtains by the arrow along
Navigation routine is plotted on the electronic map.
Wherein, drafting module 303 is additionally operable to the direction along shape vector, is drawn on navigation routine every a distance
Direction arrow.
The scheme that this programme provides, by path drawing into the shape vector of needs, such as arrowhead form, this method uses Android
Native method, without picture and other resources, simply, reliably.In addition interval can also be set, while navigation routine is drawn
This shape is drawn once again along navigation routine drawing path.
For convenience of description, each several part of apparatus above is divided into various modules with function or unit describes respectively.Certainly,
Each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the present invention.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Claims (10)
1. the method for direction arrow is drawn on a kind of navigation of electronic map route, which is characterized in that the described method includes：
Draw the shape vector of direction arrow；
Calculate the shape vector of the direction arrow and the offset of navigation of electronic map route；
According to the offset, the direction arrow is drawn on the electronic map along navigation routine.
2. the method as described in claim 1, which is characterized in that the shape vector for drawing direction arrow specifically includes：
Two endpoints of the path length of the navigation routine are obtained, as the first control point and the second control point；
The path width of the navigation routine is obtained, second control point is the path length and the phase of the path width
Intersection point；
By the crosspoint of another a line on the path width of the navigation routine and path, as the 3rd control point；
Another a line obtains the 4th control point on the path, and the 4th control point is the end of another a line on the path
Point；
First control point and the straight line that the 4th control point is formed and second control point and the 3rd control point
The straight line parallel of composition；
The 5th control point is generated between second control point and the 3rd control point；
The 6th control point is generated between first control point and the 4th control point；
The figure formed between six control points, for the shape vector for the direction arrow drawn out, six control points
Including the first control point, the second control point, the 3rd control point, the 3rd control point, the 4th control point, the 5th control point and the 6th control
Point processed.
3. method as claimed in claim 2, which is characterized in that the method further includes：
The straight line that 6th control point is formed with first control point, with the 5th control point and second control point
The straight line parallel of composition；
Or,
The straight line that 6th control point is formed with the 4th control point, with the 5th control point and the 3rd control point
The straight line parallel of composition.
4. method as claimed in claim 2, which is characterized in that the shape vector for calculating the direction arrow with electronically
The offset of figure navigation routine, specifically includes：
The distance between two central points in navigation routine are calculated, the distance is offset；
By the abscissa at six control points, the offset is subtracted, obtains new coordinate；
The arrow is plotted in along navigation routine on the electronic map according to the new coordinate.
5. the method as described in claim 1-4 is any, which is characterized in that the method further includes：
Along the direction of the shape vector, the direction arrow is drawn every a distance on the navigation routine.
6. the device of direction arrow is drawn on a kind of navigation of electronic map route, which is characterized in that described device includes determining arrow
Measure module, computing module and drafting module；
The definite vector module, for drawing the shape vector of direction arrow；
The computing module, for calculating the offset of the shape vector of the direction arrow and navigation of electronic map route；
The drafting module, for the offset obtained according to the computing module, along navigation routine in the electronics
The direction arrow is drawn on map.
7. device as claimed in claim 6, which is characterized in that the drafting module specifically includes first acquisition unit, second
Acquiring unit and the 3rd acquiring unit；
The first acquisition unit, for obtaining the two of the path length of the navigation routine endpoints, as the first control point
With the second control point, and the path width of the navigation routine is obtained, second control point is the path length and described
The crosspoint of path width；
The second acquisition unit, for by the crosspoint of another a line on the path width of the navigation routine and path, making
For the 3rd control point, and another a line obtains the 4th control point on the path, and the 4th control point is on the path
The endpoint of another a line；First control point and the straight line that the 4th control point is formed and second control point with it is described
The straight line parallel that 3rd control point is formed；
3rd acquiring unit, for generating the 6th control point between first control point and the 4th control point,
The 5th control point is generated between second control point and the 3rd control point；
The figure formed between six control points, for the shape vector for the direction arrow drawn out, six control points
Including the first control point, the second control point, the 3rd control point, the 3rd control point, the 4th control point, the 5th control point and the 6th control
Point processed.
8. device as claimed in claim 6, which is characterized in that described device further includes：
The straight line that 6th control point is formed with first control point, with the 5th control point and second control point
The straight line parallel of composition；
Or,
The straight line that 6th control point is formed with the 4th control point, with the 5th control point and the 3rd control point
The straight line parallel of composition.
9. device as claimed in claim 6, which is characterized in that the computing module specifically includes：It calculates two in navigation routine
The distance between a central point, the distance are offset, by the abscissa at six control points, subtract the offset,
Obtain new coordinate；
Correspondingly, the drafting module, for according to the new coordinate that the computing module obtains by the arrow along leading
Air route line is plotted on the electronic map.
10. the device as described in claim 6-9 is any, which is characterized in that the drafting module is additionally operable to along the vector
The direction arrow is drawn in the direction of shape on the navigation routine every a distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711483200.7A CN108053751B (en) | 2017-12-29 | 2017-12-29 | Method and device for drawing direction arrow on electronic map navigation route |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711483200.7A CN108053751B (en) | 2017-12-29 | 2017-12-29 | Method and device for drawing direction arrow on electronic map navigation route |
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| Publication Number | Publication Date |
|---|---|
| CN108053751A true CN108053751A (en) | 2018-05-18 |
| CN108053751B CN108053751B (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711483200.7A Active CN108053751B (en) | 2017-12-29 | 2017-12-29 | Method and device for drawing direction arrow on electronic map navigation route |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110136221A (en) * | 2019-04-12 | 2019-08-16 | 百度在线网络技术（北京）有限公司 | Preprocess method and device for figure layer drafting of navigating |
| CN111024113A (en) * | 2019-12-05 | 2020-04-17 | 深圳震有科技股份有限公司 | GMap-based navigation path direction arrow drawing method, system and equipment |
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| CN102954795A (en) * | 2011-08-19 | 2013-03-06 | 比亚迪股份有限公司 | Amplified crossing map drawing method and its apparatus |
| CN104613973A (en) * | 2014-05-07 | 2015-05-13 | 腾讯科技（深圳）有限公司 | Picture generation, display method and device |
| CN105574931A (en) * | 2014-11-07 | 2016-05-11 | 高德信息技术有限公司 | Electronic map road drawing method and device |
| CN107220335A (en) * | 2017-05-25 | 2017-09-29 | 北京元心科技有限公司 | Map plotting method and device, terminal device and readable storage medium |
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| DE19750550A1 (en) * | 1996-12-13 | 1999-06-17 | Zbigniew Lason | Street map with index system for finding streets and specific locations |
| CN102954795A (en) * | 2011-08-19 | 2013-03-06 | 比亚迪股份有限公司 | Amplified crossing map drawing method and its apparatus |
| CN104613973A (en) * | 2014-05-07 | 2015-05-13 | 腾讯科技（深圳）有限公司 | Picture generation, display method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110136221A (en) * | 2019-04-12 | 2019-08-16 | 百度在线网络技术（北京）有限公司 | Preprocess method and device for figure layer drafting of navigating |
| CN110136221B (en) * | 2019-04-12 | 2023-04-11 | 阿波罗智联(北京)科技有限公司 | Preprocessing method and device for drawing navigation map layer |
| CN111024113A (en) * | 2019-12-05 | 2020-04-17 | 深圳震有科技股份有限公司 | GMap-based navigation path direction arrow drawing method, system and equipment |
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| CN108053751B (en) | 2020-10-23 |
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