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(svn r10485) -Codechange: add a callback mechanism to determine whether building an industry is allowed at a given location.

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This commit is contained in:
rubidium
2007-07-09 13:21:49 +00:00
parent c29b4a7720
commit bb8923c336
5 changed files with 109 additions and 17 deletions
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90
src/newgrf_industries.cpp
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@@ -7,6 +7,9 @@
#include "debug.h"
#include "functions.h"
#include "macros.h"
#include "variables.h"
#include "landscape.h"
#include "table/strings.h"
#include "industry.h"
#include "industry_map.h"
#include "newgrf.h"
@@ -14,6 +17,8 @@
#include "newgrf_spritegroup.h"
#include "newgrf_industries.h"
#include "newgrf_commons.h"
#include "newgrf_text.h"
#include "newgrf_town.h"
#include "date.h"
/* Since the industry IDs defined by the GRF file don't necessarily correlate
@@ -116,7 +121,7 @@ uint32 GetIndustryIDAtOffset(TileIndex new_tile, TileIndex old_tile, const Indus
uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
const Industry *industry = object->u.industry.ind;
TileIndex tile = object->u.industry.tile;
TileIndex tile = object->u.industry.tile;
const IndustrySpec *indspec = GetIndustrySpec(industry->type);
switch (variable) {
@@ -130,8 +135,9 @@ uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte par
return 0;
}
}
/* TODO: somehow determine whether we're in water or not */
case 0x43: return GetClosestWaterDistance(tile, true); // Manhattan distance of closes dry/water tile
/* Manhattan distance of closes dry/water tile */
case 0x43: return GetClosestWaterDistance(tile, (object->u.industry_location.spec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
/* Get industry ID at offset param */
case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), tile, industry);
@@ -260,6 +266,84 @@ uint16 GetIndustryCallback(uint16 callback, uint32 param1, uint32 param2, Indust
return group->g.callback.result;
}
uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
TileIndex tile = object->u.industry_location.tile;
if (object->scope == VSG_SCOPE_PARENT) {
return TownGetVariable(variable, parameter, available, ClosestTownFromTile(tile, (uint)-1));
}
switch (variable) {
case 0x62: // Land info of nearby tiles
case 0x64: break; // Distance of nearest industry of given type
/* Location where to build the industry */
case 0x80: return tile;
case 0x81: return GB(tile, 8, 8);
/* Pointer to the town the industry is associated with */
case 0x82: return ClosestTownFromTile(tile, (uint)-1)->index;
case 0x83:
case 0x84:
case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
/* Number of the layout */
case 0x86: return object->u.industry_location.itspec_index;
/* Ground type */
case 0x87: return GetTerrainType(tile);
/* Town zone */
case 0x88: return GetTownRadiusGroup(ClosestTownFromTile(tile, (uint)-1), tile);
/* Manhattan distance of the closest town */
case 0x89: return min(DistanceManhattan(ClosestTownFromTile(tile, (uint)-1)->xy, tile), 255);
/* Lowest height of the tile */
case 0x8A: return GetTileZ(tile);
/* Distance to the nearest water/land tile */
case 0x8B: return GetClosestWaterDistance(tile, (object->u.industry_location.spec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
/* Square of Euclidian distance from town */
case 0x8D: return min(DistanceSquare(ClosestTownFromTile(tile, (uint)-1)->xy, tile), 65535);
}
DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
*available = false;
return (uint32)-1;
}
bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index)
{
const IndustrySpec *indspec = GetIndustrySpec(type);
ResolverObject object;
const SpriteGroup *group;
NewIndustryResolver(&object, tile, NULL);
object.GetVariable = IndustryLocationGetVariable;
object.callback = CBID_INDUSTRY_LOCATION;
object.u.industry_location.tile = tile;
object.u.industry_location.spec = indspec;
object.u.industry_location.itspec_index = itspec_index;
group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
if (group == NULL || group->type != SGT_CALLBACK) return false;
switch (group->g.callback.result) {
case 0x400: return true;
case 0x401: _error_message = STR_0239_SITE_UNSUITABLE;
case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST;
case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT;
default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + group->g.callback.result);
}
return false;
}
static int32 DerefIndProd(uint field, bool use_register)
{
return use_register ? (int32)GetRegister(field) : field;