CN102542902B - Method and device for switching 2.5-dimensional visual angle - Google Patents
Method and device for switching 2.5-dimensional visual angle Download PDFInfo
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- CN102542902B CN102542902B CN201010616233.6A CN201010616233A CN102542902B CN 102542902 B CN102542902 B CN 102542902B CN 201010616233 A CN201010616233 A CN 201010616233A CN 102542902 B CN102542902 B CN 102542902B
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Abstract
The embodiment of the invention discloses a method and a device for switching a 2.5-dimensional visual angle, in particular for switching a 2.5-dimensional map visual angle. The method comprises the following steps of: receiving a visual angle switching instruction, wherein the visual angle switching instruction comprises the 2.5-dimensional map visual angle selected by a user in a preset visual angle range; constructing a perspective transformation matrix according to the map visual angle and the length and the width of a screen of a display interface; acquiring a data packet corresponding to the current display interface, wherein the data packet comprises two-dimensional map data corresponding to an object to be drawn in the current display interface; performing perspective transformation on the data packet by using the perspective transformation matrix; and displaying a corresponding 2.5-dimensional map on the current display interface according to data acquired by performing the perspective transformation on the data packet. The embodiment of the invention also discloses a device corresponding to the method. According to the method and the device, the map visual angle can be changed continuously, a display effect of the 2.5-dimensional map is changed according to a selection of a client, and the user experience is improved according to the continuous change of the map visual angle.
Description
Technical field
The present invention relates to navigation map and show field, relate in particular to method and the device that switch at a kind of 2.5 dimension visual angles.
Background technology
In navigational system, the demonstration of map is a very important function, the style that existing map shows has 2 dimensions, 2.5 dimensions, 3 dimensions etc., 2.5 dimensions are a kind of map display styles between 2 dimensions and 3 dimensions, can show and there is relief image, to the more far-reaching visual field of user and experience very true to nature.
In existing map shows, can realize the switching of 2 dimensions to the display styles of 2.5 dimension maps demonstrations, but in system for draw 2.5 dimensions map show visual angle fix, can not carry out visual angle switching according to the visual angle of user's selection, can not change the effect that 2.5 dimension maps show, reduce user's experience.
Summary of the invention
Method and device that the embodiment of the present invention provides a kind of 2.5 dimension visual angles to switch, switch ground angle of field for 2.5 dimension maps while demonstration, obtain customer satisfaction system display effect.
The method of the embodiment of the present invention comprises: receive visual angle switching command, visual angle switching command comprises the 2.5 dimension ground angle of field that user selects in preset angular field of view; The length of the screen of visual angle and display interface and wide structure perspective transformation matrix according to the map; Obtain packet corresponding to current display interface, packet comprises two dimensional map data corresponding to object that will draw in current display interface; Adopt perspective transformation matrix to carry out perspective transform to packet; In current display interface, show 2.5 corresponding dimension maps according to the data that obtain after packet perspective transform.
The device of the embodiment of the present invention comprises: receiving unit, and for receiving visual angle switching command, visual angle switching command comprises the 2.5 dimension ground angle of field that user selects; Tectonic element, for length and the wide structure perspective transformation matrix of the screen of visual angle and display interface according to the map; Acquiring unit, for obtaining packet corresponding to current display interface, packet comprises two dimensional map data corresponding to object that will draw in current display interface; Converter unit, for adopting perspective transformation matrix to carry out perspective transform to packet; Display unit, for showing 2.5 corresponding dimension maps in current display interface according to the data that obtain after packet perspective transform.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
By 2.5 length and the wide structure perspective transformation matrixs of tieing up ground angle of field and display interface screen of selecting according to user, corresponding packet is carried out to perspective transform, can effectively realize the drafting of 2.5 dimension maps, due to the preset scope at visual angle in system, make user can be as required angle of field selectively, can realize the continuous variation of ground angle of field, improve user's experience.
Brief description of the drawings
Fig. 1 is a schematic diagram of the method for a kind of 2.5 dimension visual angles switchings of the embodiment of the present invention;
Fig. 2 is another schematic diagram of the method for a kind of 2.5 dimension visual angles switchings of the embodiment of the present invention;
Fig. 3 is a schematic diagram of the device of a kind of 2.5 dimension visual angles switchings of the embodiment of the present invention;
Fig. 4 is a schematic diagram of the device of a kind of 2.5 dimension visual angles switchings of the embodiment of the present invention.
Embodiment
Method and device that the embodiment of the present invention provides a kind of 2.5 dimension visual angles to switch, in the time that 2.5 dimensions show, change according to the ground angle of field of user's selection the effect that map shows for map, improves user's experience.
Referring to Fig. 1, is the embodiment of method that switch at a kind of 2.5 dimension visual angles of the embodiment of the present invention, comprising:
101, receive visual angle switching command;
In embodiments of the present invention, user is in the process of use navigational system, can switch at any time ground angle of field, change 2.5 dimension display effects of map, user selects 2.5 for after ground angle of field, system will receive visual angle switching command, visual angle switching command comprises the 2.5 dimension ground angle of field that user selects in preset angular field of view, wherein, ground angle of field is viewpoint and the direction of visual lines of observing, in 2.5 dimension maps show, display interface shows that the shape of 2.5 dimension images is determined by viewpoint and direction of visual lines, therefore, ground angle of field has determined the concrete effect that 2.5 dimension maps show, ground angle of field is less, the scope showing is larger, visual angle is larger, the scope showing is less.
102, the length of the screen of visual angle and display interface and wide structure perspective transformation matrix according to the map;
In the demonstration of 2.5 dimension maps, perspective transformation matrix is for carrying out perspective transform to the two dimensional map data of map data base, utilizes data after perspective transform to draw and has relief 2.5 dimension maps.Wherein, perspective transform refers to the condition of utilizing the centre of perspectivity, picture point, impact point three point on a straight line, make image-bearing surface (perspective plane) rotate a certain angle around trace (axis of homology) by chasles theorem, destroy original projected light wire harness, still can keep the constant conversion of projection geometric figure on image-bearing surface.
In embodiments of the present invention, after receiving visual angle switching command, system is by length and the wide structure perspective transformation matrix of the screen of visual angle and current display interface according to the map.
103, obtain packet corresponding to current display interface;
After System Construction perspective transformation matrix, packet corresponding to current display interface will be obtained, wherein packet comprises two dimensional map data corresponding to object that will draw in current display interface, and the object that will draw comprises building, viaduct, mountain region, large-scale vegetation, water system and various large-scale marks etc.
104, adopt perspective transformation matrix to carry out perspective transform to packet;
After system obtains perspective transformation matrix and packet corresponding to current display interface, employings perspective transform proof is carried out to perspective transform to packet.
105, in current display interface, show 2.5 corresponding dimension maps according to the data that obtain after packet perspective transform.
After perspective transform completes, system will show 2.5 corresponding dimension maps in current display interface according to the data that obtain after packet perspective transform.
In embodiments of the present invention, by utilizing length and the wide structure perspective transformation matrix of screen of 2.5 dimension ground angle of field that user selects and display interface, perspective transformation matrix can be changed according to the size of screen, improve dirigibility, the perspective transformation matrix that utilization obtains carries out perspective transform to corresponding packet, can effectively realize the drafting of 2.5 dimension maps, due to the preset scope at visual angle in system, make user can be as required angle of field selectively, can realize the continuous transformation of ground angle of field, improve user's experience.
For better understanding technology, refer to Fig. 2, the embodiment of the method for switching for a kind of 2.5 dimension visual angles of the embodiment of the present invention, comprising:
201, receive visual angle switching command;
Step 201 is identical with the content that the step 101 in embodiment illustrated in fig. 1 is described, and repeats no more herein.
Wherein, the scope that switch at the visual angle of system intialization is 1 degree to 90 degree, and user can carry out the switching at visual angle as required, selects applicable ground angle of field explicitly to scheme.
In embodiments of the present invention, arrange user selectively the method for angle of field have a variety ofly, for example, at display interface, visual angle incremented/decremented button is set, user can carry out by button click the switching of ground angle of field, and this kind of method can effectively realize the continuous variation of ground angle of field; Or, the display effect at visual angle and user's use habit according to the map, at least two fixing choice boxs corresponding to ground angle of field are set on display interface, and user can click choice box corresponding to ground angle of field as required, obtains the 2.5 dimension map display effects of wanting.In actual applications, system can also arrange other mode by selectively angle of field of user, does not limit herein.
202, the length by screen and the wide screen rectangle forming are converted to trapezoidal;
In embodiments of the present invention, the data of the map of storage are two dimensional map data, in 2.5 dimension maps show, two dimensional map data need to be converted to the data of drawing 2.5 dimension maps, need to carry out the operations such as translation, Rotation and Zoom to the apex coordinate that needs rendered object in original two dimensional map data, and these implementations that operate in computing machine are constructed perspective transformation matrix exactly, coordinate figure in two dimensional map data corresponding rendered object and corresponding perspective transformation matrix are multiplied each other, just can obtain 2.5 dimension maps and show the data that need.Therefore,, after receiving visual angle switching command, system will be constructed perspective transformation matrix, when beginning, system will, according to Perspective Principles and ground angle of field, be converted to trapezoidal by the length by screen and the wide screen rectangle forming, for example, when the length of screen is H, wide while being W, when ground angle of field is x, the coordinate of screen rectangle is: (0,0), (W, 0), (W, H), (0, H); Utilize Perspective Principles (object from people's eyes away from little, closely large), convert the rectangular coordinates of display screen to trapezoid coordinate (0,0), (W, 0), (W+x, H), (x, H).
203, by screen rectangle and the trapezoidal corresponding rectangle being converted to respectively;
Screen rectangle convert to trapezoidal after, system will carry out respectively quadrilateral to foursquare conversion, and square is to trapezoidal conversion, by the trapezoidal square that converts to, converts screen rectangle to quadrilateral.
204, corresponding rectangle is multiplied each other acquisition perspective transformation matrix.
System after obtaining two the corresponding rectangles after screen rectangle and trapezoidal conversion respectively multiplies each other these two rectangles, can obtain perspective transformation matrix.
205, obtain packet corresponding to current display interface;
After system obtains perspective transformation matrix, packet corresponding to current display interface will be obtained, wherein packet comprises two dimensional map data corresponding to object that will draw in current display interface, and the object that will draw comprises building, viaduct, mountain region, large-scale vegetation, water system and various large-scale marks etc.
206, adopt perspective transformation matrix to carry out perspective transform to packet;
The packet getting is carried out to perspective transform, the parameter in the coordinate figure of the two dimensional map data in packet and perspective transformation matrix is carried out to computing, obtain needing after perspective transform the data corresponding to object of drawing, completed perspective transform.
207, draw 2.5 dimension maps according to the data that obtain after packet perspective transform;
In embodiments of the present invention, the data of carrying out according to packet obtaining after perspective transform are drawn 2.5 dimension maps by system, data after perspective transform mainly comprise the point, line, surface data that the rendered object of current display interface is corresponding, utilize these data, can draw out and there are relief 2.5 dimension maps.
208, the 2.5 dimension maps of drawing are presented in current display interface.
After system completes the drafting of 2.5 dimension maps, the 2.5 dimension maps of drawing are presented in current display interface, switch at the visual angle of having realized 2.5 dimension maps.
By the 2.5 dimension ground angle of field selected according to user and length and the wide structure perspective transformation matrix of display interface screen, and corresponding packet is carried out to perspective transform, realize the drafting of 2.5 dimension maps, because the structure of perspective matrix has utilized the length of screen and wide, make screen size in the time changing, perspective matrix also will change thereupon, obtain 2.5 corresponding dimension map display effects, improve the dirigibility that map shows, again due to the preset scope at visual angle in system, make user can be as required angle of field selectively, can realize the continuous variation of ground angle of field, improve user's experience.
Refer to Fig. 3, be the embodiment of the device that in the embodiment of the present invention, switch at a kind of 2.5 dimension visual angles, comprising:
Receiving unit 301, for receiving visual angle switching command, visual angle switching command comprises the 2.5 dimension ground angle of field that user selects;
Tectonic element 302, for length and the wide structure perspective transformation matrix of the screen of visual angle and display interface according to the map;
Acquiring unit 303, for obtaining packet corresponding to current display interface, packet comprises two dimensional map data corresponding to object that will draw in current display interface;
Converter unit 304, for adopting perspective transformation matrix to carry out perspective transform to packet;
Display unit 305, for showing 2.5 corresponding dimension maps in current display interface according to the data that obtain after described packet perspective transform.
In embodiments of the present invention, receiving unit 301 receives visual angle switching command, visual angle switching command comprises the 2.5 dimension ground angle of field that user selects, tectonic element 302 is length and the wide structure perspective transformation matrix of the screen of visual angle and display interface according to the map, acquiring unit 303 obtains packet corresponding to current display interface, packet comprises two dimensional map data corresponding to object that will draw in current display interface, converter unit 304 adopts perspective transformation matrix to carry out perspective transform to packet, finally, display unit 305 shows 2.5 corresponding dimension maps in current display interface according to the data that obtain after packet perspective transform.
The device of embodiment, refers to Fig. 4 for a better understanding of the present invention, is the device embodiment that switch at a kind of 2.5 dimension visual angles of the embodiment of the present invention, comprising:
Receiving unit 301 in embodiment illustrated in fig. 3, tectonic element 302, acquiring unit 303, converter unit 304, drawing unit 305, and identical with the content of description embodiment illustrated in fig. 3, repeat no more herein.
Wherein, tectonic element 302 comprises:
The first converting unit 401, for according to Perspective Principles and ground angle of field, is converted to trapezoidal by the length by screen and the wide screen rectangle forming;
The second converting unit 402, for by screen rectangle and the trapezoidal corresponding rectangle being converted to respectively;
The unit 403 that multiplies each other, for acquisition perspective transformation matrix that corresponding rectangle is multiplied each other.
Wherein, display unit 305 comprises:
Drawing unit 404, for drawing 2.5 dimension maps according to the data that obtain after packet perspective transform;
Map display unit 405, for being presented at current display interface by the described 2.5 dimension maps of drawing.
In embodiments of the present invention, the tectonic element 302 that is used for constructing perspective transformation matrix is by 3 module compositions, the first converting unit 401 is according to Perspective Principles and ground angle of field, length by screen and the wide screen rectangle forming are converted to trapezoidal, have the second converting unit 402 by screen rectangle again and be trapezoidally converted to respectively corresponding rectangle, the rectangle that the unit 403 that multiplies each other obtains the second converting unit 402 multiplies each other and obtains perspective transformation matrix.305 of display units comprise drawing unit 404 and map display unit 405, drawing unit 404 carries out after perspective transform at converter unit 304, draw 2.5 dimension maps according to the data that obtain after packet perspective transform, map display unit 405 is presented at the 2.5 dimension maps of drawing in current display interface.
By the 2.5 dimension ground angle of field selected according to user and length and the wide structure perspective transformation matrix of display interface screen, and corresponding packet is carried out to perspective transform, realize the drafting of 2.5 dimension maps, because the structure of perspective matrix has utilized the length of screen and wide, make screen size in the time changing, perspective matrix also will change thereupon, obtain 2.5 corresponding dimension map display effects, improve the dirigibility that map shows, again due to the preset scope at visual angle in system, make user can be as required angle of field selectively, can realize the continuous variation of ground angle of field, improve user's experience.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is can carry out the hardware that instruction is relevant by program to complete, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
The method and the device that above a kind of 2.5 dimension visual angles provided by the present invention are switched are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. the method that switch at 2.5 dimension visual angles, is characterized in that, comprising:
Receive visual angle switching command, described visual angle switching command comprises the 2.5 dimension ground angle of field that user selects in preset angular field of view;
According to the length of the screen of described ground angle of field and display interface and wide structure perspective transformation matrix, comprising: according to Perspective Principles and described ground angle of field, the length by screen and the wide screen rectangle forming are converted to trapezoidal;
By described screen rectangle and the described trapezoidal corresponding rectangle being converted to respectively;
By the rectangle of the described correspondence acquisition perspective transformation matrix that multiplies each other;
Obtain packet corresponding to current display interface, described packet comprises two dimensional map data corresponding to object that will draw in current display interface;
Adopt described perspective transformation matrix to carry out perspective transform to described packet;
In current display interface, show 2.5 corresponding dimension maps according to the data that obtain after described packet perspective transform.
2. method according to claim 1, is characterized in that, described preset angular field of view is 1 degree to 90 degree.
3. method according to claim 1, is characterized in that, describedly in current display interface, shows that according to the data that obtain after described packet perspective transform 2.5 corresponding dimension maps comprise:
Draw 2.5 dimension maps according to the data that obtain after described packet perspective transform;
The described 2.5 dimension maps of drawing are presented in current display interface.
4. the device that switch at 2.5 dimension visual angles, is characterized in that, comprising:
Receiving unit, for receiving visual angle switching command, described visual angle switching command comprises the 2.5 dimension ground angle of field that user selects;
Tectonic element, be used for according to the length of the screen of described ground angle of field and display interface and wide structure perspective transformation matrix, comprise: the first conversion subelement, for according to Perspective Principles and described ground angle of field, is converted to trapezoidal by the length by screen and the wide screen rectangle forming;
The second conversion subelement, for by described screen rectangle and the described trapezoidal corresponding rectangle being converted to respectively;
The subelement that multiplies each other, for acquisition perspective transformation matrix that the rectangle of described correspondence is multiplied each other;
Acquiring unit, for obtaining packet corresponding to current display interface, described packet comprises two dimensional map data corresponding to object that will draw in current display interface;
Converter unit, for adopting described perspective transformation matrix to carry out perspective transform to described packet;
Display unit, for showing 2.5 corresponding dimension maps in current display interface according to the data that obtain after described packet perspective transform.
5. device according to claim 4, is characterized in that, described display unit comprises:
Drawing unit, for drawing 2.5 dimension maps according to the data that obtain after described packet perspective transform; Map display unit, for being presented at current display interface by the described 2.5 dimension maps of drawing.
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Denomination of invention: Method and device for switching 2.5-dimensional visual angle Effective date of registration: 20190404 Granted publication date: 20140716 Pledgee: Jiading Branch of Shanghai Bank Co., Ltd. Pledgor: Shanghai Botai Yuezhen Electrical Equipment Manufacturing Co., Ltd. Registration number: 2019110000002 |
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Address after: 201815 208, building 4, No. 1411, Yecheng Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: Botai vehicle networking technology (Shanghai) Co.,Ltd. Address before: 200233 block D, 2f, Zhaofeng global building, No. 1800, Zhongshan West Road, Xuhui District, Shanghai Patentee before: SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING Co.,Ltd. |
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Change date: 20220329 Registration number: 2019110000002 Pledgor after: Botai vehicle networking technology (Shanghai) Co.,Ltd. Pledgor before: SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING Co.,Ltd. |