cpp/openttd-patchpack/source Files · src/newgrf_house.h

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rubidium

(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.

/* $Id$ */

/** @file newgrf_house.h */

#ifndef NEWGRF_HOUSE_H
#define NEWGRF_HOUSE_H

#include "town.h"
#include "newgrf_callbacks.h"

/**
 * Makes class IDs unique to each GRF file.
 * Houses can be assigned class IDs which are only comparable within the GRF
 * file they were defined in. This mapping ensures that if two houses have the
 * same class as defined by the GRF file, the classes are different within the
 * game. An array of HouseClassMapping structs is created, and the array index
 * of the struct that matches both the GRF ID and the class ID is the class ID
 * used in the game.
 *
 * Although similar to the HouseIDMapping struct above, this serves a different
 * purpose. Since the class ID is not saved anywhere, this mapping does not
 * need to be persistent; it just needs to keep class ids unique.
 */
struct HouseClassMapping {
	uint32 grfid;     ////< The GRF ID of the file this class belongs to
	uint8  class_id;  ////< The class id within the grf file
};

void CheckHouseIDs();

HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid);

void InitializeBuildingCounts();
void IncreaseBuildingCount(Town *t, HouseID house_id);
void DecreaseBuildingCount(Town *t, HouseID house_id);
void AfterLoadCountBuildings();

void DrawNewHouseTile(TileInfo *ti, HouseID house_id);
void AnimateNewHouseTile(TileIndex tile);
void ChangeHouseAnimationFrame(TileIndex tile, uint16 callback_result);

uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile);

bool CanDeleteHouse(TileIndex tile);

bool NewHouseTileLoop(TileIndex tile);

enum HouseTrigger {
	/* The tile of the house has been triggered during the tileloop. */
	HOUSE_TRIGGER_TILE_LOOP     = 0x01,
	/*
	 * The top tile of a (multitile) building has been triggered during and all
	 * the tileloop other tiles of the same building get the same random value.
	 */
	HOUSE_TRIGGER_TILE_LOOP_TOP = 0x02,
};
void TriggerHouse(TileIndex t, HouseTrigger trigger);

#endif /* NEWGRF_HOUSE_H */