CN103021259A - Map moving rendering method and system - Google Patents
Map moving rendering method and system Download PDFInfo
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- CN103021259A CN103021259A CN2012105359149A CN201210535914A CN103021259A CN 103021259 A CN103021259 A CN 103021259A CN 2012105359149 A CN2012105359149 A CN 2012105359149A CN 201210535914 A CN201210535914 A CN 201210535914A CN 103021259 A CN103021259 A CN 103021259A
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Abstract
The invention discloses a map moving rendering method which includes: obtaining a map needed to be displayed and judging whether the map needed to be displayed is overlapped with a currently displayed map; loading and rendering data corresponding to the map needed to be displayed if no overlapping appears, and displaying the map needed to be displayed; and reserving the overlapped data in the currently display map if overlapping appears, loading and rendering data in the map needed to be displayed and not overlapped with those in the currently displayed map, and displaying the map needed to be displayed. Correspondingly, the invention further discloses a map moving rendering system. According to the map moving rendering method and system, map rendering speed can be improved, the map can be fast and smoothly displayed in moving mode, and fast map browsing experience is good.
Description
Technical field
The present invention relates to the rendering intent that a kind of map moves, and the rendering system that moves of a kind of map.
Background technology
In traditional demonstration wall technology, for showing the map of appointed area, generally adopt the rendering intent of double buffering, by image data corresponding to appointed area is rendered in the rear buffering, flip displays is in window.In the process of browsing, the zone that needs to show constantly changes, then need constantly the image data in the new zone to be rendered in the rear buffering, in the process of the movement that continues, the All Ranges in the rear buffering all needs again to play up, in showing wall system, window is very large, need to play up the pixel of millions, in the process of map continuous moving, have obvious interruption and unsmooth.Even do not consider the acquisition process of image data, resource and time spent in the render process are too many, and the experience of the fast browsing of map is very poor, is difficult to reach the level and smooth fast moving of map.
Summary of the invention
Based on this, the invention provides rendering intent and system that a kind of map moves, can accelerate the rendering speed of map, map is mobile display quickly and smoothly, and the experience of map fast browsing is better.
The rendering intent that a kind of map moves comprises the steps:
Obtain the map that needs demonstration, judge whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If do not have overlappingly, then load data corresponding to the described map that need to show and play up, shows the described map that shows of needing;
If have overlappingly, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, shows the described map that shows of needing.
The rendering system that a kind of map moves comprises and obtains judge module, the first loaded and displayed module and the second loaded and displayed module;
The described judge module that obtains is used for obtaining the map that needs demonstration, judges whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If it is overlapping that described the first loaded and displayed module is used for not having, then loading describedly needs data corresponding to the map that shows and plays up, and shows the described map that needs demonstration;
If it is overlapping that described the second loaded and displayed module is used for having, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, show the described map that needs demonstration.
The rendering intent that map of the present invention moves and system, consider a large amount of overlapping region that map may exist between two two field pictures in moving process, after getting access to the map that needs to show, at first the map with current demonstration compares, and has judged whether lap; When finding to have when overlapping, take full advantage of the map datum of the current demonstration of video memory storage, need not load the total data of map to be shown, greatly reduced the pressure played up of map in the moving process, can accelerate the rendering speed of map, map is mobile display quickly and smoothly, and the experience of map fast browsing is better; It is more that map moves the required data of playing up, and utilizes the present invention to carry out the effect that map smoothly moves further obvious, is particularly suitable for the fast browsing of massive map data and shows that the large window such as wall shows the field.
Description of drawings
Fig. 1 is the rendering intent schematic flow sheet in one embodiment that map of the present invention moves.
Fig. 2 is the schematic diagram before and after map moves among the embodiment.
Fig. 3 is the rendering system structural representation in one embodiment that map of the present invention moves.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, be the rendering intent schematic flow sheet in one embodiment that map of the present invention moves, comprise the steps:
S11, obtain the map that need to show, judge whether the described map that shows and the map of current demonstration of needing has overlapping;
Current display device shows certain scope of view picture map, if when receiving the map move, obtains the map that needs demonstration; This step is after getting access to the map that needs to show, at first the map with current demonstration compares, and looks into to see if there is lap; In traditional demonstration wall technology, because display window is larger, the map datum of playing up is very huge, all must play up all data of the map after moving during each moving map, usually need play up the pixel of millions, display window is larger, and the speed of playing up is slower, map often has interruption and unsmooth when showing, the experience of map view is relatively poor; The purpose of this step is the map datum that takes full advantage of the current demonstration of video memory storage, if overlapped data is arranged, then need not load the total data of map to be shown, can accelerate the rendering speed of map.
In a preferred embodiment, the described map that needs demonstration that obtains, judge whether the described map of demonstration and the map of current demonstration of needing has overlapping step specifically to comprise:
1a, obtain first pixel coordinate on four summits of map that need to show;
1b, obtain second pixel coordinate on four summits of map of current demonstration;
1c, judge according to described the first pixel coordinate and described the second pixel coordinate whether the described map that shows and the map of current demonstration of needing has overlapping;
If 1d has overlapping, calculate overlapping range and the described zero lap scope that needs to show map according to described the first pixel coordinate and described the second pixel coordinate;
Owing to having stored fixing pixel coordinate in the attribute data of a secondary map, when map moves, obtain current demonstration four summits of map pixel coordinate and mobile after need the pixel coordinate on four summits of map of showing, can judge whether the described map of demonstration and the map of current demonstration of needing has overlapping, if have overlappingly, then calculate the zero lap scope of overlapping range and the described map that need to show.
If S12 does not have overlapping, then load data corresponding to the described map that need to show and play up, shows the described map that shows of needing;
The map zero lap scope that determines the map of current demonstration and need to show from step S11 then loads described the need and shows the data that map is corresponding and play up.
If S13 has overlapping, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, show the described map that needs demonstration;
In a preferred embodiment, this step specifically can comprise:
3a, according to described overlapping range, obtain the map datum corresponding to overlapping range of the map of the described current demonstration of storing in the video memory;
3b, according to described underlapped scope, load map datum corresponding to underlapped scope in the described map that need to show;
If judge overlapping scope is arranged, because the data corresponding to map of current demonstration all have been stored in the video memory, then can keep overlapping data, play up after reloading non-overlapping data corresponding to the map that need to show, need not play up the total data of the map that needs demonstration, rendering speed is accelerated, and map is mobile display quickly and smoothly.
In a preferred embodiment, also comprise step before map datum corresponding to the overlapping range of the map of the described current demonstration of in obtaining video memory, storing: filter the hot spot data in map datum corresponding to overlapping range in the map of described current demonstration;
In loading the described map that needs to show, also comprise step during map datum corresponding to underlapped scope: loads hot spot data corresponding to overlapping range in the described map that needs demonstration;
Wherein, described hot spot data comprises the map element additional datas such as title mark, map symbol, landform mark, as shown in Figure 2, Fig. 2 a is the map of current demonstration, and the map of Fig. 2 b for needing to show is the superimposed of Fig. 2 a and Fig. 2 b from Fig. 2 c, can find out from Fig. 2 c, the mark on A ground just is positioned at the map of current demonstration and the border of the overlapping range of the map that needs to show, this mark can belong to overlapping range, can belong to the zero lap scope again; Make mistakes for preventing that data from processing, can filter out the hot spot data in map datum corresponding to described overlapping range before map datum corresponding to the overlapping range of the map of the described current demonstration of in obtaining video memory, storing, only keep base map data corresponding to overlapping range and get final product; Simultaneously, in loading the described map that needs to show, also should load hot spot data corresponding to overlapping range in the described map that needs to show during map datum corresponding to underlapped scope.
Accordingly, as shown in Figure 3, the rendering system that the present invention also provides a kind of map to move comprises and obtains judge module 31, the first loaded and displayed module 32 and the second loaded and displayed module 33;
The described judge module 31 that obtains is used for obtaining the map that needs demonstration, judges whether the described map of demonstration and the map of current demonstration of needing has overlapping;
Current display device shows certain scope of view picture map, if when receiving the map move, obtains the map that needs demonstration; This module is after getting access to the map that needs to show, at first the map with current demonstration compares, and looks into to see if there is lap; In traditional demonstration wall technology, because display window is larger, the map datum of playing up is very huge, all must play up all data of the map after moving during each moving map, usually need play up the pixel of millions, display window is larger, and the speed of playing up is slower, map often has interruption and unsmooth when showing, the experience of map view is relatively poor; The purpose of this module is the map datum that takes full advantage of the current demonstration of video memory storage, if overlapped data is arranged, then need not load the total data of map to be shown, can accelerate the rendering speed of map.
In a preferred embodiment, the described judge module 31 that obtains comprises the first acquisition module, the second acquisition module, judge module and computing module;
Described the first acquisition module is used for obtaining first pixel coordinate on four summits of map that need demonstration;
Described the second acquisition module is for second pixel coordinate on four summits of map that obtain current demonstration;
Described judge module is used for judging according to described the first pixel coordinate and described the second pixel coordinate whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If it is overlapping that described computing module is used for having, calculate overlapping range and the described zero lap scope that needs to show map according to described the first pixel coordinate and described the second pixel coordinate;
Owing to having stored fixing pixel coordinate in the attribute data of a secondary map, when map moves, obtain current demonstration four summits of map pixel coordinate and mobile after need the pixel coordinate on four summits of map of showing, can judge whether the described map of demonstration and the map of current demonstration of needing has overlapping, if have overlappingly, then calculate the zero lap scope of overlapping range and the described map that need to show.
If it is overlapping that described the first loaded and displayed module 32 is used for not having, then loading describedly needs data corresponding to the map that shows and plays up, and shows the described map that needs demonstration;
The map zero lap scope that determines the map of current demonstration and need to show in obtaining judge module then loads described the need and shows the data that map is corresponding and play up.
If it is overlapping that described the second loaded and displayed module 33 is used for having, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, show the described map that needs demonstration;
In a preferred embodiment, described the second loaded and displayed module 33 comprises the 3rd acquisition module and load-on module:
Described the 3rd acquisition module is used for according to described overlapping range, obtains the map datum corresponding to overlapping range of the map of the described current demonstration of storing in the video memory;
Described load-on module is used for according to described underlapped scope, loads map datum corresponding to underlapped scope in the described map that needs to show;
If judge overlapping scope is arranged, because the data corresponding to map of current demonstration all have been stored in the video memory, then can keep overlapping data, play up after reloading non-overlapping data corresponding to the map that need to show, need not play up the total data of the map that needs demonstration, rendering speed is accelerated, and map is mobile display quickly and smoothly.
In a preferred embodiment, described the 3rd acquisition module also is used for filtering the hot spot data in map datum corresponding to overlapping range in the map of described current demonstration before map datum corresponding to the overlapping range of the map that obtains the described current demonstration that video memory stores;
Described load-on module also is used for loading described hot spot data corresponding to overlapping range in the described map that needs to show that load when needing map datum corresponding to the underlapped scope of map that shows.
Wherein, described hot spot data comprises the map element additional datas such as title mark, map symbol, landform mark, as shown in Figure 2, Fig. 2 a is the map of current demonstration, and the map of Fig. 2 b for needing to show is the superimposed of Fig. 2 a and Fig. 2 b from Fig. 2 c, can find out from Fig. 2 c, the mark on A ground just is positioned at the map of current demonstration and the border of the overlapping range of the map that needs to show, this mark can belong to overlapping range, can belong to the zero lap scope again; Make mistakes for preventing that data from processing, can filter out the hot spot data in map datum corresponding to described overlapping range before map datum corresponding to the overlapping range of the map of the described current demonstration of in obtaining video memory, storing, only keep base map data corresponding to overlapping range and get final product; Simultaneously, in loading the described map that needs to show, also should load hot spot data corresponding to overlapping range in the described map that needs to show during map datum corresponding to underlapped scope.
The rendering intent that map of the present invention moves and system, consider a large amount of overlapping region that map may exist between two two field pictures in moving process, after getting access to the map that needs to show, at first the map with current demonstration compares, and has judged whether lap; When finding to have when overlapping, take full advantage of the map datum of the current demonstration of video memory storage, need not load the total data of map to be shown, greatly reduced the pressure played up of map in the moving process, can accelerate the rendering speed of map, map is mobile display quickly and smoothly, and the experience of map fast browsing is better; It is more that map moves the required data of playing up, and utilizes the present invention to carry out the effect that map smoothly moves further obvious, is particularly suitable for the fast browsing of massive map data and shows that the large window such as wall shows the field.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the rendering intent that map moves is characterized in that, comprises the steps:
Obtain the map that needs demonstration, judge whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If do not have overlappingly, then load data corresponding to the described map that need to show and play up, shows the described map that shows of needing;
If have overlappingly, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, shows the described map that shows of needing.
2. the rendering intent that moves of map according to claim 1 is characterized in that, described obtaining needs the map that shows, judges whether the described map that shows and the map of current demonstration of needing has overlapping step specifically to comprise:
Obtain first pixel coordinate on four summits of map that need demonstration;
Obtain second pixel coordinate on four summits of map of current demonstration;
Judge according to described the first pixel coordinate and described the second pixel coordinate whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If have overlappingly, calculate overlapping range and the described zero lap scope that needs to show map according to described the first pixel coordinate and described the second pixel coordinate.
3. the rendering intent that moves of map according to claim 2 is characterized in that, if described have overlappingly, then keeps data overlapping in the map of described current demonstration, and the step that loads non-overlapping data in the described map that needs to show specifically comprises:
According to described overlapping range, obtain the map datum corresponding to overlapping range of the map of the described current demonstration of storing in the video memory;
According to described underlapped scope, load map datum corresponding to underlapped scope in the described map that needs to show.
4. the rendering intent that moves of map according to claim 3 is characterized in that,
Also comprise step before map datum corresponding to the overlapping range of the map of the described current demonstration of in obtaining video memory, storing: filter the hot spot data in map datum corresponding to overlapping range in the map of described current demonstration;
In loading the described map that needs to show, also comprise step during map datum corresponding to underlapped scope: loads hot spot data corresponding to overlapping range in the described map that needs demonstration.
5. the rendering system that map moves is characterized in that, comprises obtaining judge module, the first loaded and displayed module and the second loaded and displayed module;
The described judge module that obtains is used for obtaining the map that needs demonstration, judges whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If it is overlapping that described the first loaded and displayed module is used for not having, then loading describedly needs data corresponding to the map that shows and plays up, and shows the described map that needs demonstration;
If it is overlapping that described the second loaded and displayed module is used for having, then keep data overlapping in the map of described current demonstration, load in the described map that needs to show and play up after the non-overlapping data, show the described map that needs demonstration.
6. the rendering system that moves of map according to claim 5 is characterized in that, the described judge module that obtains comprises the first acquisition module, the second acquisition module, judge module and computing module;
Described the first acquisition module is used for obtaining first pixel coordinate on four summits of map that need demonstration;
Described the second acquisition module is for second pixel coordinate on four summits of map that obtain current demonstration;
Described judge module is used for judging according to described the first pixel coordinate and described the second pixel coordinate whether the described map of demonstration and the map of current demonstration of needing has overlapping;
If it is overlapping that described computing module is used for having, calculate overlapping range and the described zero lap scope that needs to show map according to described the first pixel coordinate and described the second pixel coordinate.
7. the rendering system that moves of map according to claim 6 is characterized in that, described the second loaded and displayed module comprises the 3rd acquisition module and load-on module:
Described the 3rd acquisition module is used for according to described overlapping range, obtains the map datum corresponding to overlapping range of the map of the described current demonstration of storing in the video memory;
Described load-on module is used for according to described underlapped scope, loads map datum corresponding to underlapped scope in the described map that needs to show.
8. the rendering system that moves of map according to claim 7 is characterized in that,
Described the 3rd acquisition module also is used for filtering the hot spot data in map datum corresponding to overlapping range in the map of described current demonstration before map datum corresponding to the overlapping range of the map that obtains the described current demonstration that video memory stores;
Described load-on module also is used for loading described hot spot data corresponding to overlapping range in the described map that needs to show that load when needing map datum corresponding to the underlapped scope of map that shows.
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Address after: 510670 Guangdong Province, Guangzhou high tech Industrial Development Zone Kezhu Road No. 233 Patentee after: Wei Chong group Limited by Share Ltd Address before: 510663 Guangzhou province high tech Industrial Development Zone, Guangdong, Cai road, No. 6, No. Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |