CN100421119C - Method for drawing map in game - Google Patents
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- CN100421119C CN100421119C CNB2006100896791A CN200610089679A CN100421119C CN 100421119 C CN100421119 C CN 100421119C CN B2006100896791 A CNB2006100896791 A CN B2006100896791A CN 200610089679 A CN200610089679 A CN 200610089679A CN 100421119 C CN100421119 C CN 100421119C
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Abstract
The present invention belongs to the image display technique, and provides a method for drawing a map in a game. The method particularly comprises: judging whether a present map in the game is drawn for the first time or not, if true, then acquiring map pixel blocks and drawing in order, else storing map image data of the last game cycle; in the next game cycle, calculating the longitudinal-transverse pixel difference between the maps of the last and the next game cycles, and extracting the stored map image data of the last game cycle; drawing according to the pixel difference, and then drawing non-displayed parts of the stored map image data with the map blocks as unit. By using the present invention, drawing again the same parts of the maps in the last and the next game cycle with the map blocks as unit is avoided, logical operation during drawing the map is reduced, time is saved, and the cycle period of drawing the game map is shortened. Without sacrificing image quality, the fluency, artistic and playable properties of the game can be ensured.
Description
Technical field
The present invention relates to the image display technology field, the method for drawing map in especially a kind of recreation.
Background technology
Along with the continuous upgrading of recreation, people are also more and more higher to the requirement of game picture.It is the circulation in cycle by the time that game process is one, is called the recreation circulation, in each recreation circulation, carries out the drafting of a game logic computing and game picture.Game picture generally is made of tableaux and dynamic menu.Tableaux refers to the background map of playing, and a recreation has a world map usually, is that unit sets coordinate with the pixel.In order to save the recycling of storage resources and map segment, world map is divided into the identical square of size, be called face of land pixel piece, world map can also further be divided into outpost of the tax office map according to the game logic needs, for example: the player makes a breakthrough successfully, then enter into another pass, load new outpost of the tax office map, perhaps world map is divided into South China, North China etc. by game logic, the every area of player then loads new chorography, if comprise outpost of the tax office map, be unit then, each outpost of the tax office map carried out piecemeal divide with outpost of the tax office map.Specific practice: the initial point (generally the left upper apex with world map or outpost of the tax office map is the map initial point) with world map or outpost of the tax office map is that the starting point order is divided, and for each face of land pixel piece unique number is set.In each recreation circulation, when map is drawn, obtain the world coordinates of current player position, again according to the size of screen, calculate the world coordinates (being the world coordinates of top left corner apex) of the starting point of map in the current screen, world coordinates and screen size according to map starting point in the current screen, obtain face of land pixel pieces all in the current screen, and draw one by one, thereby finish the drafting of background map, in each recreation circulation, the rendering context map all uses the same method.Wherein, world map, the map in referring to play; World coordinates refers to the coordinate of each picture element in the world map, and starting point is the upper left corner of world map; Current map refers in order to obtain reasonable sense organ effect, except the situation that map boundary line overlaps with screen border, generally the player to be placed all the time the center of screen with current position of player and the body of a map or chart that screen size was determined.Dynamic menu, the role who is provided with in all player and the recreation in referring to play, its state can be with the game logic real-time change.Dynamic menu is made of a series of continuous pictures, and every pictures is called a frame, and frame number is many more, the action that shows is level and smooth more, in each recreation circulation, drawn tableaux after, result according to logical operation draws dynamic menu again, only draws a frame of dynamic menu during drafting.
Below as can be seen, all need to calculate and obtain face of land pixel pieces all in the current screen in each recreation circulation, even a last recreation circulation is identical with the map in the next recreation circulation or only have several faces of land pixel piece different, a large amount of calculating in each recreation circulation is for the hardware requirement height of running game.
In mobile phone network game, because the processing speed of mobile phone is low, internal memory is little, when realizing the recreation of picture complexity, need spend the long time with the said method map making, can cause in a recreation circulation, can't finish all logical operations and the demonstration of game picture, just enter recreation circulation next time, make game picture appear to have the jumping lattice, the phenomenon that animation is delayed.
Summary of the invention
The technical problem to be solved in the present invention provides the method for drawing map in a kind of recreation, can reduce the drafting time of map, guarantees fluency, aesthetic property and the playability of recreation.
For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:
(1) preserves last recreation round-robin map image data;
(2) obtain next recreation circulation and a last recreation circulation player position in length and breadth to world coordinates, according to described in length and breadth to world coordinates obtain map in next recreation circulation and the last recreation circulation in length and breadth to pixel differences;
(3) the last recreation round-robin map image data that will preserve are taken out, and draw according to pixel differences.
(4), draw the part that does not show in the view data of preserving according to pixel differences.
Wherein, described step (1) further comprises before:
When (0) drawing recreation circulation map for the first time, order is drawn face of land pixel piece.
Wherein, described step (0) further comprises before:
1) world map is divided into face of land pixel piece;
2) starting point from world map begins for each face of land pixel piece unique number to be set.
Wherein, described step 1) further comprises:
11) world map is divided into outpost of the tax office map;
12) be that starting point is divided into face of land pixel piece with outpost of the tax office map top left corner apex.
Wherein, described step (0) comprising:
(01) obtains the world coordinates of player position;
(02) calculates the world coordinates on this recreation circulation map summit according to the world coordinates that obtains;
(03) coordinate according to the apex coordinate that calculates obtains corresponding face of land pixel piece;
(04) summit with the upper left corner is that starting point is drawn face of land pixel piece in proper order.
Wherein, obtain comprising to pixel differences in length and breadth of map in next recreation circulation and the last recreation circulation to world coordinates in length and breadth according to described in the described step (2):
According to the difference of a last recreation horizontal world coordinates of circulation player and next recreation circulation player horizontal world coordinates draw next recreation circulation circulate with a last recreation in the lateral pixel of map poor;
Draw vertical pixel differences of map in next a recreation circulation and the last recreation circulation according to the difference of a last recreation vertical world coordinates of circulation player and the vertical world coordinates of next recreation circulation player.
Wherein, described step (3) further comprises:
Calculate the world coordinates of the graphical pointv of this map in screen, and in screen, show the identical part of figure view data circularly of playing up and down.
Wherein, described step (4) comprising:
(41) obtain in the view data the not face of land pixel piece of display part;
(42) obtain the starting point coordinate of each face of land pixel piece;
(43) draw recreation circulation map respectively according to the starting point coordinate of each face of land pixel piece correspondence.
Wherein, described step (4) further comprises:
Map image data in the last recreation circulation of (41) preserving in the delete buffer;
(42) shown map image data in next recreation circulation are saved in the internal memory.
Wherein, the described recreation circulation map cycle of carrying out is drawn.
Above technical scheme as can be seen, when in a last recreation circulation, having drawn map, this map image data have been preserved, next circulation time of playing, from internal memory, obtain the map image data in the last recreation circulation of being preserved, according to map pixel differences during recreation circulates up and down, directly a last recreation circulation map is drawn, and then be that unit draws institute and preserved the part that not have drafting in the image with face of land pixel piece, so just having avoided again with face of land pixel piece is that the unit drafting is played up and down and schemed identical part circularly.Therefore, the time has been saved in the logical operation when having reduced map making, has shortened the cycle period of drawing map, is implemented under the situation of not sacrificing image quality, guarantees fluency, aesthetic property and the playability of recreation.
Description of drawings
Fig. 1 is the process flow diagram of the embodiment of the invention;
Fig. 2 is a world map of the present invention;
Fig. 3 is the shown map of a recreation circulation in the present invention;
Fig. 4 is the shown map of the current recreation circulation of the present invention;
Fig. 5 is a recreation circulation and the more resulting map of current recreation recycle ratio in the present invention.
Embodiment
The present invention is the method for drawing map in a kind of recreation, for make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention further is elaborated.
At first, method provided by the present invention is carried out describe, in general terms:
Method provided by the present invention comprises step:
Step (1): for the first time during the rendering context map, calculate the world coordinates of current map starting point according to world coordinates, the screen size of player position, obtain corresponding face of land pixel piece in the current screen, order is drawn;
Step (2): will go up the current map of a recreation round-robin and be kept in the internal memory as view data;
Step (3): obtain the world coordinates of player in next circulation, calculate with a last recreation circulation in the vertical and horizontal pixel differences of world coordinates;
Step (4): next circulation time of playing, last recreation round-robin map image data of preserving are taken out, according to pixel differences, calculate the world coordinates of the graphical pointv of this map in screen, draw;
Step (5): according to pixel differences, obtain the face of land pixel piece that does not have demonstration in the image of being preserved, draw.
Computation process:
The hypothetical world map is 500 * 500, is divided into the face of land pixel piece of 20*20, and then this world map has 25*25 face of land pixel piece, for the face of land pixel piece numbering is set by transversely arranged, is respectively 1,2,3.....625 four apex coordinates of the face of land pixel piece of numbering 1 are (0,0), (20,0), (0,20), (20,20); Four apex coordinates of the face of land pixel piece of numbering 2 are (20,0), (40,0), (0,20), (40,40); The rest may be inferred, and four apex coordinates that are numbered 625 face of land pixel piece are (480,480), (480,500), (500,480), (500,500)
Suppose that screen size is 100 * 100 pixels, the screen coordinate on four summits of screen is: (0,0), (100,0), (0,100), (100,100)
The world coordinates of supposing current player is (60,80), and player position is positioned at screen center.
When drawing this map for the first time,, draw by following calculating:
Four apex coordinates of current map are: (x0, y0), (x1, y0), (x0, y1), (x1, y1), according to formula: (x0+x1)/2=60, x0+x1=100, (y0+y1)/and 2=80, y0+y1=100, the world coordinates that can calculate current ground Fig. 4 summit is respectively (10,30), (110,30), (10,130), (110,130), wherein (10,30) are the world coordinates of screen (0,0) point, also are the world coordinatess of current map starting point.
According to this starting point coordinate (10,30), can know that this point coordinate is positioned at first row, in the face of land pixel piece of second row.Because screen size is 100 * 100, can know that the coordinate on four summits of current map is: (10,30), (110,30), (10,130), (110,130), the face of land pixel piece that should draw be the 1st row to the 6th row, the 2nd walk to the 7th the row obtains this pixel piece, when drawing, with the 1st row, (10,30) point-rendering of the face of land pixel piece of the 2nd row is on (0,0) of screen point.Promptly the face of land pixel piece of Hui Zhiing is 36 altogether, and the map actual size of drafting is 120 * 120, and the map size that the player sees by screen is 100*100.The view data of 100 * 100 maps that show is kept in the internal memory, and this map is represented with P, four apex coordinates of its correspondence, and promptly current map reference is: (10,30), (110,30), (10,130), (110,130).
Next circulation time of playing, if player position has laterally moved+15 pixels, be that player's coordinate is (75,80), because pixel differences is less than the size of face of land pixel piece, therefore, the face of land pixel piece of current map correspondence is still the 1st row to the 6th row, the 2nd walks to the face of land pixel piece of the 7th row, covered current map mid point (25 among the image P that preserves, 30) and point (110,130) area of Gou Chenging, this area is the same section of a recreation circulation and next recreation circulation map, playing circularly up and down, the figure different piece is the part behind+15 pixels of 6 face of land pixel piece skews in the 6th row, be that unit is drawn with face of land pixel piece when drawing this part map again, therefore need repaint 6 face of land pixel pieces in the 6th row, during drafting, take out the view data P of the map in the last recreation circulation of preserving in the internal memory, draw, with (25,30) point-rendering of this image at (0 of screen, 0) on the point, after having drawn this image, repaint 6 face of land pixel pieces in the 6th row, the drafting starting point of each face of land pixel piece, the world coordinates that is respectively on the image P is (100,30), (100,50), (100,70), (100,90), (100,110), 6 of (100,130) points.After completing, current map is saved in the internal memory, this map represents that with P1 four apex coordinates of its correspondence are: (25,30), (125,30), (25,130), (125,130).
Be elaborated with reference to the accompanying drawings:
Referring to Fig. 1, realize that idiographic flow of the present invention is as follows:
Step 101: judge whether world map or outpost of the tax office map in the current recreation circulation are to draw for the first time, if, then carry out step 102, otherwise, carry out step 104;
Step 102: calculate the world coordinates on four summits of current map according to world coordinates, the screen size of player position, obtain corresponding face of land pixel piece, and order is drawn;
Step 103: current map is kept in the buffer zone as view data;
Step 104: from buffer zone, take out the map image data in the last recreation circulation of preserving,, calculate the world coordinates of the graphical pointv of this map in screen, draw according to pixel differences;
Step 105: obtain the world coordinates of player's current location, the pixel differences of player position during calculating circulates with a last recreation;
Step 106: according to pixel differences, obtain the pairing face of land of the map segment pixel piece that does not have demonstration in the image of being preserved, order is drawn;
Step 107: the map image data in the last recreation circulation of being preserved in the delete buffer are saved in shown map image data in next recreation circulation in the internal memory.
Wherein, carry out also needing following steps before this flow process, specifically comprise:
(a): world map is divided into face of land pixel piece;
(b): for each face of land pixel piece is provided with a unique number;
Wherein, in the step (a),, be unit then with outpost of the tax office map if world map further is divided into outpost of the tax office map, each outpost of the tax office map is divided.
Below in conjunction with recreation circulation of the present invention interface, further be elaborated:
Referring to Fig. 2, world map is divided into equal and opposite in direction, be shaped as foursquare face of land pixel piece, the upper left corner with world map is provided with a numbering as starting point to each face of land pixel piece then, in the present invention world map is divided into equal and opposite in direction, be shaped as foursquare 20 face of land pixel pieces, begin from the upper left corner with 1 to 20 numeral these 20 face of land pixel piece serial numbers.
In first time during the rendering context map, the coordinate position according to current player calculates the world coordinates of current map starting point in world map, according to world coordinates, can draw the face of land pixel piece that this world coordinates begins in proper order.
Referring to Fig. 3, be the shown map of a last recreation circulation of the present invention, the shown map of a last recreation circulation is represented with the A district, comprises that numbering is respectively 1,2,3,5,6,7,9,10,11 face of land pixel piece, wherein, label is the position that 6 face of land pixel piece is represented current player place.
Label is the map at 1,2,3,5,6,7,9,10,11 pixel piece place, the face of land, and promptly label is that 6 face of land pixel piece is the center, and the map that mobile phone screen can show is as current map;
The map of A district expression is saved in buffer zone.
The purpose that the A district is saved in buffer zone is when avoiding in each recreation circulation rendering context at next recreation circulation time, reduce face of land pixel piece in the background repeat draw, because in the player process, no matter be walking, run, or stationary state, the difference of the map that map that a last recreation circulation at its place is shown and current recreation circulation are shown is not too large, if for example the player remains static, then map does not change, if will repaint all face of land pixel pieces, then can take limited resources; If the player is in the walking or the state of running, the position at player place is generally speaking just on basis, original position, move limited pixel, the variation of map is the variation of several pixel locations, most face of land pixel piece still need repaint at next recreation circulation time.
Referring to Fig. 4, be the shown map of next recreation circulation, the shown map of next recreation circulation is represented with the B district, comprises that label is 2,3,4,6,7,8,10,11,12 face of land pixel piece, wherein, label is the position that 7 face of land pixel piece is represented current player place.
The shown drawing Map of current recreation circulation may further comprise the steps:
Step (1): according to the position at current player place, calculate with a last recreation circulation in the pixel differences of player position;
Step (2): from buffer zone, take out the represented map of a last recreation circulation,, calculate the drafting coordinate of this map in screen, draw according to pixel differences;
Step (3): poor according to pixel, there is not the pairing face of land of the map segment pixel piece that shows in the drawing image, promptly label is respectively 4,8,12 face of land pixel piece;
So far, finished the shown drawing Map of current recreation circulation, the current map that is presented at last in the screen is represented with the B district, comprises that label is respectively 2,3,4,6,7,8,10,11,12 face of land pixel piece, also should comprise after this:
Step (4): the map of B district expression is saved in the buffer zone.
When drawing current map, the map image data of having utilized a last recreation circulation to be preserved, it is the A district, position according to a last recreation circulation player place is that label is 6 face of land pixel piece, with the position at current recreation circulation player place be that label is 7 face of land pixel piece, the position that can find out current recreation circulation player place is just on the basis of a last recreation circulation player position, move limited pixel, therefore, the variation of map, it is the variation of several pixel locations, in the process of drawing current recreation circulation map, just avoided repeating to draw label and be respectively 2,3,6,7,10,11 face of land pixel piece only needs to draw the part that changes, and promptly label is respectively 4,8,12 face of land pixel piece.
Referring to Fig. 5, be a recreation circulation in the present invention and the map of next recreation recycle ratio than gained.
Wherein, last recreation circulation of I district expression and the different part of next recreation circulation, last recreation circulation of II district expression and the identical part of next recreation circulation, when map making, earlier the A district is kept in the buffer zone, when drawing the B district, the A district is taken out from buffer zone, according to the transverse and longitudinal pixel differences of player position in recreation circulates up and down, calculate the drafting coordinate of A district in screen, carry out the drafting in A district, and then draw the part that A district in the B district does not have demonstration, be that label is respectively 4,8,12 face of land pixel pieces, at this moment the I district is arranged in mobile phone EMS memory, II district and label are respectively 4,8,12 face of land pixel pieces, but because the screen of mobile phone is limited, the map that the player can see is that II district and label are respectively 4,8,12 face of land pixel pieces.
When drawing a map, be saved in buffer zone with drawing the good shown map of current recreation circulation, be when drawing map for next recreation circulation, the same section map is that unit is drawn with face of land pixel piece again in the minimizing map, in the present embodiment, the identical part of map is the II district in the recreation circulation up and down, when drawing, only needing with face of land pixel piece be unit is drawn does not have demonstration in the last recreation circulation segment map, and promptly label is respectively 4,8,12 face of land pixel piece.
More than the method for drawing map in a kind of recreation provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the method for drawing map in the recreation is characterized in that, comprises step:
(1) preserves last recreation round-robin map image data;
(2) obtain next recreation circulation and a last recreation circulation player position in length and breadth to world coordinates, according to described in length and breadth to world coordinates obtain map in next recreation circulation and the last recreation circulation in length and breadth to pixel differences;
(3) the last recreation round-robin map image data that will preserve are taken out, and draw according to pixel differences;
(4), draw the part that does not show in the view data of preserving according to pixel differences.
2. the method for drawing map in the recreation according to claim 1 is characterized in that, described step (1) further comprises before:
When (0) drawing recreation circulation map for the first time, order is drawn face of land pixel piece.
3. the method for drawing map in the recreation according to claim 2 is characterized in that, described step (0) further comprises before:
1) world map is divided into face of land pixel piece;
2) starting point from world map begins for each face of land pixel piece unique number to be set.
4. the method for drawing map in the recreation according to claim 3 is characterized in that, described step 1) further comprises:
11) world map is divided into outpost of the tax office map;
12) be that starting point is divided into face of land pixel piece with outpost of the tax office map top left corner apex.
5. the method for drawing map in the recreation according to claim 2 is characterized in that, described step (0) comprising:
(01) obtains the world coordinates of player position;
(02) calculates the world coordinates on this recreation circulation map summit according to the world coordinates that obtains;
(03) world coordinates according to the summit that calculates obtains corresponding face of land pixel piece;
(04) summit with the upper left corner is that starting point is drawn face of land pixel piece in proper order.
6. the method for drawing map in the recreation according to claim 1 is characterized in that, obtains comprising to pixel differences in length and breadth of map in next recreation circulation and the last recreation circulation to world coordinates in length and breadth according to described in the described step (2):
According to the difference of a last recreation horizontal world coordinates of circulation player and next recreation circulation player horizontal world coordinates draw next recreation circulation circulate with a last recreation in the lateral pixel of map poor;
Draw vertical pixel differences of map in next a recreation circulation and the last recreation circulation according to the difference of a last recreation vertical world coordinates of circulation player and the vertical world coordinates of next recreation circulation player.
7. the method for drawing map in the recreation according to claim 1 is characterized in that, described step (3) further comprises:
Calculate the world coordinates of the graphical pointv of this map in screen, and in screen, show the identical part of figure view data circularly of playing up and down.
8. the method for drawing map in the recreation according to claim 1 is characterized in that, described step (4) comprising:
(41) obtain in the view data the not face of land pixel piece of display part;
(42) obtain the starting point coordinate of each face of land pixel piece;
(43) draw recreation circulation map respectively according to the starting point coordinate of each face of land pixel piece correspondence.
9. the method for drawing map in the recreation according to claim 1 is characterized in that, described step (4) further comprises:
Map image data in the last recreation circulation of (41) preserving in the delete buffer;
(42) shown map image data in next recreation circulation are saved in the internal memory.
10. the method for drawing map in the recreation according to claim 1 is characterized in that, described recreation circulation map is carried out the cycle drafting.
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Cited By (1)
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| US11436811B2 (en) | 2017-04-25 | 2022-09-06 | Microsoft Technology Licensing, Llc | Container-based virtual camera rotation |
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| CN103198112A (en) * | 2013-03-28 | 2013-07-10 | 广东威创视讯科技股份有限公司 | Incremental update method and device in distributed display |
| CN103729558A (en) * | 2013-12-26 | 2014-04-16 | 北京像素软件科技股份有限公司 | Scene change method |
| CN104571994A (en) * | 2014-12-31 | 2015-04-29 | 苏州乐米信息科技有限公司 | Loop playback method for background map in mobile game |
| CN105381611A (en) * | 2015-11-19 | 2016-03-09 | 网易（杭州）网络有限公司 | Method and device for layered three-dimensional display of 2D game scene |
| CN106582020B (en) * | 2016-12-01 | 2020-06-19 | 北京像素软件科技股份有限公司 | Game level processing method and device |
| CN108283804A (en) * | 2017-12-28 | 2018-07-17 | 天脉聚源（北京）科技有限公司 | A kind of image processing method and device |
| CN109771950B (en) * | 2019-01-31 | 2021-08-10 | 腾讯科技（深圳）有限公司 | Node map setting method, device and storage medium |
| CN109675309B (en) * | 2019-02-01 | 2022-09-13 | 网易（杭州）网络有限公司 | Construction method and device of game scene |
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