author | celestar |
Tue, 19 Jun 2007 07:21:01 +0000 | |
branch | gamebalance |
changeset 9913 | e79cd19772dd |
parent 9912 | 1ac8aac92385 |
child 9629 | 66dde6412125 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file newgrf_commons.cpp Implementation of the class OverrideManagerBase |
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* and its descendance, present and futur |
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*/ |
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#include "stdafx.h" |
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#include "openttd.h" |
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#include "variables.h" |
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#include "landscape.h" |
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#include "town.h" |
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#include "industry.h" |
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#include "newgrf.h" |
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#include "newgrf_commons.h" |
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/** Constructor of generic class |
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* @param offset end of original data for this entity. i.e: houses = 110 |
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* @param maximum of entities this manager can deal with. i.e: houses = 512 |
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* @param invalid is the ID used to identify an invalid entity id |
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*/ |
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OverrideManagerBase::OverrideManagerBase(uint16 offset, uint16 maximum, uint16 invalid) |
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{ |
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max_offset = offset; |
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max_new_entities = maximum; |
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invalid_ID = invalid; |
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mapping_ID = CallocT<EntityIDMapping>(max_new_entities); |
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entity_overrides = MallocT<uint16>(max_offset); |
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memset(entity_overrides, invalid, sizeof(entity_overrides)); |
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} |
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/** Destructor of the generic class. |
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* Frees allocated memory of constructor |
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*/ |
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OverrideManagerBase::~OverrideManagerBase() |
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{ |
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free(mapping_ID); |
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free(entity_overrides); |
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} |
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/** Since the entity IDs defined by the GRF file does not necessarily correlate |
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* to those used by the game, the IDs used for overriding old entities must be |
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* translated when the entity spec is set. |
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* @param local_id id in grf file |
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* @param entity_type original entity type |
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*/ |
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void OverrideManagerBase::Add(uint8 local_id, uint entity_type) |
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{ |
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assert(entity_type < max_offset); |
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entity_overrides[entity_type] = local_id; |
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} |
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/** Resets the mapping, which is used while initializing game */ |
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void OverrideManagerBase::ResetMapping() |
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{ |
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memset(mapping_ID, 0, (max_new_entities - 1) * sizeof(EntityIDMapping)); |
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} |
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/** Resets the override, which is used while initializing game */ |
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void OverrideManagerBase::ResetOverride() |
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{ |
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for (uint16 i = 0; i < max_offset; i++) { |
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entity_overrides[i] = invalid_ID; |
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} |
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} |
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/** Return the ID (if ever available) of a previously inserted entity. |
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* @param grf_local_id ID of this enity withing the grfID |
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* @param grfid ID of the grf file |
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* @return the ID of the candidate, of the Invalid flag item ID |
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*/ |
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uint16 OverrideManagerBase::GetID(uint8 grf_local_id, uint32 grfid) |
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{ |
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const EntityIDMapping *map; |
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for (uint16 id = max_offset; id < max_new_entities; id++) { |
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map = &mapping_ID[id]; |
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if (map->entity_id == grf_local_id && map->grfid == grfid) { |
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return id; |
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} |
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} |
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return invalid_ID; |
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} |
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/** Reserves a place in the mapping array for an entity to be installed |
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* @param grf_local_id is an arbitrary id given by the grf's author. Also known as setid |
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* @param grfid is the id of the grf file itself |
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* @param substitute_id is the original entity from which data is copied for the new one |
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* @return the proper usable slot id, or invalid marker if none is found |
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*/ |
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uint16 OverrideManagerBase::AddEntityID(byte grf_local_id, uint32 grfid, byte substitute_id) |
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{ |
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uint16 id = this->GetID(grf_local_id, grfid); |
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EntityIDMapping *map; |
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/* Look to see if this entity has already been added. This is done |
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* separately from the loop below in case a GRF has been deleted, and there |
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* are any gaps in the array. |
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*/ |
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if (id != invalid_ID) { |
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return id; |
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} |
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/* This entity hasn't been defined before, so give it an ID now. */ |
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for (id = max_offset; id < max_new_entities; id++) { |
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map = &mapping_ID[id]; |
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if (map->entity_id == 0 && map->grfid == 0) { |
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map->entity_id = grf_local_id; |
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map->grfid = grfid; |
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map->substitute_id = substitute_id; |
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return id; |
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} |
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} |
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return invalid_ID; |
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} |
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/** Gives the substitute of the entity, as specified by the grf file |
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* @param entity_id of the entity being queried |
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* @return mapped id |
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*/ |
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uint16 OverrideManagerBase::GetSubstituteID(byte entity_id) |
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{ |
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return mapping_ID[entity_id].substitute_id; |
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} |
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127 |
|
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/** Install the specs into the HouseSpecs array |
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* It will find itself the proper slot onwhich it will go |
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* @param hs HouseSpec read from the grf file, ready for inclusion |
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*/ |
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void HouseOverrideManager::SetEntitySpec(const HouseSpec *hs) |
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{ |
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HouseID house_id = this->AddEntityID(hs->local_id, hs->grffile->grfid, hs->substitute_id); |
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135 |
|
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if (house_id == invalid_ID) { |
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grfmsg(1, "House.SetEntitySpec: Too many houses allocated. Ignoring."); |
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return; |
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139 |
} |
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140 |
|
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memcpy(&_house_specs[house_id], hs, sizeof(*hs)); |
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142 |
|
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143 |
/* Now add the overrides. */ |
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for (int i = 0; i != max_offset; i++) { |
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HouseSpec *overridden_hs = GetHouseSpecs(i); |
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146 |
|
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if (entity_overrides[i] != hs->local_id) continue; |
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148 |
|
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overridden_hs->override = house_id; |
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entity_overrides[i] = invalid_ID; |
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151 |
} |
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} |
9912
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|
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/** Method to find an entity ID and to mark it as reserved for the Industry to be included. |
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* @param grf_local_id ID used by the grf file for pre-installation work (equivalent of TTDPatch's setid |
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* @param grfid ID of the current grf file |
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* @param substitute_id industry from which data has been copied |
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* @return a free entity id (slotid) if ever one has been found, or Invalid_ID marker otherwise |
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159 |
*/ |
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uint16 IndustryOverrideManager::AddEntityID(byte grf_local_id, uint32 grfid, byte substitute_id) |
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161 |
{ |
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/* This entity hasn't been defined before, so give it an ID now. */ |
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for (uint16 id = 0; id < max_new_entities; id++) { |
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/* Get the real live industry */ |
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const IndustrySpec *inds = GetIndustrySpec(id); |
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166 |
|
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/* This industry must be one that is not available(enabled), mostly because of climate. |
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* And it must not already be used by a grf (grffile == NULL). |
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* So reseve this slot here, as it is the chosen one */ |
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if (!inds->enabled && inds->grf_prop.grffile == NULL) { |
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EntityIDMapping *map = &mapping_ID[id]; |
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172 |
|
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if (map->entity_id == 0 && map->grfid == 0) { |
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/* winning slot, mark it as been used */ |
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map->entity_id = grf_local_id; |
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map->grfid = grfid; |
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map->substitute_id = substitute_id; |
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return id; |
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179 |
} |
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180 |
} |
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181 |
} |
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182 |
|
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183 |
return invalid_ID; |
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184 |
} |
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185 |
|
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186 |
/** Method to install the new indistry data in its proper slot |
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* The slot assigment is internal of this method, since it requires |
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188 |
* checking what is available |
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189 |
* @param inds Industryspec that comes from the grf decoding process |
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190 |
*/ |
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191 |
void IndustryOverrideManager::SetEntitySpec(const IndustrySpec *inds) |
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192 |
{ |
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193 |
/* First step : We need to find if this industry is already specified in the savegame data */ |
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194 |
IndustryType ind_id = this->GetID(inds->grf_prop.local_id, inds->grf_prop.grffile->grfid); |
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195 |
|
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196 |
if (ind_id == invalid_ID) { // not found? So this is the introduction of a new industry |
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197 |
/* Second step is dealing with the override. */ |
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198 |
if (inds->grf_prop.override != invalid_ID && _industry_specs[inds->grf_prop.override].grf_prop.override == invalid_ID) { |
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199 |
/* this is an override, which means it will take the place of the industry it is |
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200 |
* designed to replace. Before we conclude that the override is allowed, |
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201 |
* we first need to verify that the slot is not holding another override |
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202 |
* If it's the case,it will be considered as a normal substitute */ |
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203 |
ind_id = inds->grf_prop.override; |
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204 |
} else { |
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205 |
/* It has already been overriden, so you've lost your place old boy. |
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206 |
* Or it is a simple substitute. |
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207 |
* In both case, we need to find a free available slot */ |
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208 |
ind_id = this->AddEntityID(inds->grf_prop.local_id, inds->grf_prop.grffile->grfid, inds->grf_prop.subst_id); |
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209 |
} |
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210 |
} |
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211 |
|
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212 |
if (ind_id == invalid_ID) { |
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213 |
grfmsg(1, "Industry.SetEntitySpec: Too many industries allocated. Ignoring."); |
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214 |
return; |
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215 |
} |
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216 |
|
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217 |
/* Now that we know we can use the given id, copy the spech to its final destination*/ |
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218 |
memcpy(&_industry_specs[ind_id], inds, sizeof(*inds)); |
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219 |
/* and mark it as usable*/ |
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220 |
_industry_specs[ind_id].enabled = true; |
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221 |
} |
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|
222 |
|
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223 |
/** Function used by houses (and soon industries) to get information |
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224 |
* on type of "terrain" the tile it is queries sits on. |
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225 |
* @param tile TileIndex of the tile been queried |
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226 |
* @return value corresponding to the grf expected format: |
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227 |
* Terrain type: 0 normal, 1 desert, 2 rainforest, 4 on or above snowline */ |
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228 |
uint32 GetTerrainType(TileIndex tile) |
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229 |
{ |
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switch (_opt.landscape) { |
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case LT_TROPIC: return GetTropicZone(tile) == TROPICZONE_DESERT ? 1 : 2; |
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case LT_ARCTIC: return GetTileZ(tile) >= GetSnowLine() ? 4 : 0; |
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default: return 0; |
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} |
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} |
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|
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TileIndex GetNearbyTile(byte parameter, TileIndex tile) |
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{ |
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int8 x = GB(parameter, 0, 4); |
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int8 y = GB(parameter, 4, 4); |
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|
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if (x >= 8) x -= 16; |
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if (y >= 8) y -= 16; |
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|
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return tile + TileDiffXY(x, y); |
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} |