1 | // |
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2 | // C++ Interface: GameStateManager |
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3 | // |
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4 | // Description: |
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5 | // |
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6 | // |
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7 | // Author: Oliver Scheuss, (C) 2007 |
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8 | // |
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9 | // Copyright: See COPYING file that comes with this distribution |
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10 | // |
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11 | // |
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12 | #ifndef NETWORK_GAMESTATEMANAGER_H |
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13 | #define NETWORK_GAMESTATEMANAGER_H |
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14 | |
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15 | #include <vector> |
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16 | |
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17 | #include "zlib.h" |
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18 | |
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19 | #include "Synchronisable.h" |
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20 | #include "orxonox/core/IdentifierIncludes.h" |
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21 | #include "orxonox/core/Iterator.h" |
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22 | #include "PacketManager.h" |
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23 | |
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24 | namespace network { |
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25 | |
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26 | /** |
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27 | * This struct defines a gamestate: |
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28 | * size: total size of the data in *data |
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29 | * data: pointer to the data allocated in the memory |
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30 | */ |
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31 | struct GameState{ |
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32 | int id; |
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33 | int size; |
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34 | unsigned char *data; |
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35 | }; |
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36 | |
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37 | /** |
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38 | * this struct defines a gamestate: |
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39 | * compsize is the size of the compressed data |
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40 | * normsize is the size of the uncompressed data |
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41 | * data are the gamestates |
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42 | */ |
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43 | struct GameStateCompressed{ |
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44 | int id; |
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45 | int compsize; |
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46 | int normsize; |
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47 | unsigned char *data; |
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48 | }; |
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49 | |
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50 | /** |
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51 | * This Class implements a manager for gamestates: |
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52 | * - creating snapshots of gamestates |
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53 | * - writing gamestates to universe |
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54 | * - diffing gamestates ? |
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55 | * |
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56 | * EN/DECODATION: |
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57 | * a: last Gamestate a client has received |
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58 | * b: new Gamestate |
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59 | * x: diffed and compressed gamestate |
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60 | * x=(a^b) |
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61 | * b=(a^x) |
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62 | * diff(a,diff(a,x))=x (hope this is correct) |
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63 | * @author Oliver Scheuss |
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64 | */ |
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65 | class GameStateManager{ |
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66 | public: |
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67 | GameStateManager(); |
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68 | ~GameStateManager(); |
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69 | void update(); |
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70 | GameStateCompressed popGameState(int clientID); |
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71 | private: |
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72 | GameState getSnapshot(int id); |
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73 | GameStateCompressed encode(GameState *a, GameState *b); |
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74 | GameState diff(GameState *a, GameState *b); |
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75 | GameStateCompressed compress_(GameState a); |
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76 | |
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77 | std::vector<GameState *> clientGameState; |
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78 | GameState reference; |
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79 | int id; |
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80 | }; |
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81 | |
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82 | } |
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83 | |
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84 | #endif |
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