author | belugas |
Fri, 08 Jun 2007 17:54:18 +0000 | |
changeset 7323 | b2871568db92 |
parent 7297 | 1df77fb920bd |
child 7331 | 0a7f00fed4e6 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file newgrf_commons.h This file simplyfies and embeds a common mechanism of |
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* loading/saving and mapping of grf entities. |
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*/ |
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#ifndef NEWGRF_COMMONS_H |
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#define NEWGRF_COMMONS_H |
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/** |
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* Maps an entity id stored on the map to a GRF file. |
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* Entities are objects used ingame (houses, industries, industry tiles) for |
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* which we need to correlate the ids from the grf files with the ones in the |
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* the savegames themselves. |
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* An array of EntityIDMapping structs is saved with the savegame so |
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* that those GRFs can be loaded in a different order, or removed safely. The |
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* index in the array is the entity's ID stored on the map. |
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* |
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* The substitute ID is the ID of an original entity that should be used instead |
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* if the GRF containing the new entity is not available. |
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*/ |
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struct EntityIDMapping { |
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uint32 grfid; ///< The GRF ID of the file the entity belongs to |
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uint8 entity_id; ///< The entity ID within the GRF file |
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uint8 substitute_id; ///< The (original) entity ID to use if this GRF is not available |
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}; |
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class OverrideManagerBase |
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{ |
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protected: |
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uint16 *entity_overrides; |
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uint16 max_offset; ///< what is the length of the original entity's array of specs |
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uint16 max_new_entities; ///< what is the amount of entities, old and new summed |
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uint16 invalid_ID; ///< ID used to dected invalid entities; |
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virtual uint16 AddEntityID(byte grf_local_id, uint32 grfid, byte substitute_id); |
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public: |
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EntityIDMapping *mapping_ID; ///< mapping of ids from grf files. Public out of convenience |
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OverrideManagerBase(uint16 offset, uint16 maximum, uint16 invalid); |
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virtual ~OverrideManagerBase(); |
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void ResetOverride(); |
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void ResetMapping(); |
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void Add(uint8 local_id, uint entity_type); |
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uint16 GetSubstituteID(byte entity_id); |
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uint16 GetID(uint8 grf_local_id, uint32 grfid); |
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inline uint16 GetMaxMapping() { return max_new_entities; }; |
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inline uint16 GetMaxOffset() { return max_offset; }; |
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}; |
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struct HouseSpec; |
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class HouseOverrideManager : public OverrideManagerBase |
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{ |
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public: |
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HouseOverrideManager(uint16 offset, uint16 maximum, uint16 invalid) : OverrideManagerBase(offset, maximum, invalid) {}; |
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void SetEntitySpec(const HouseSpec *hs); |
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}; |
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extern HouseOverrideManager _house_mngr; |
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uint32 GetTerrainType(TileIndex tile); |
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TileIndex GetNearbyTile(byte parameter, TileIndex tile); |
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#endif /* NEWGRF_COMMONS_H */ |