newgrf_canal.cpp
Go to the documentation of this file.00001
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00012 #include "stdafx.h"
00013 #include "tile_type.h"
00014 #include "debug.h"
00015 #include "newgrf_commons.h"
00016 #include "newgrf_spritegroup.h"
00017 #include "newgrf_canal.h"
00018 #include "tile_map.h"
00019 #include "water_map.h"
00020
00021
00023 WaterFeature _water_feature[CF_END];
00024
00025
00026
00027
00028 static uint32 CanalGetRandomBits(const ResolverObject *object)
00029 {
00030
00031 return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
00032 }
00033
00034
00035 static uint32 CanalGetTriggers(const ResolverObject *object)
00036 {
00037 return 0;
00038 }
00039
00040
00041 static void CanalSetTriggers(const ResolverObject *object, int triggers)
00042 {
00043 return;
00044 }
00045
00046
00047 static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00048 {
00049 TileIndex tile = object->u.canal.tile;
00050
00051 switch (variable) {
00052
00053 case 0x80: return GetTileZ(tile) / TILE_HEIGHT;
00054
00055
00056 case 0x81: return GetTerrainType(tile);
00057
00058
00059 case 0x83: return GetWaterTileRandomBits(tile);
00060 }
00061
00062 DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
00063
00064 *available = false;
00065 return UINT_MAX;
00066 }
00067
00068
00069 static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
00070 {
00071 if (group->num_loaded == 0) return NULL;
00072
00073 return group->loaded[0];
00074 }
00075
00076
00077 static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
00078 {
00079 res->GetRandomBits = &CanalGetRandomBits;
00080 res->GetTriggers = &CanalGetTriggers;
00081 res->SetTriggers = &CanalSetTriggers;
00082 res->GetVariable = &CanalGetVariable;
00083 res->ResolveReal = &CanalResolveReal;
00084
00085 res->u.canal.tile = tile;
00086
00087 res->callback = CBID_NO_CALLBACK;
00088 res->callback_param1 = 0;
00089 res->callback_param2 = 0;
00090 res->last_value = 0;
00091 res->trigger = 0;
00092 res->reseed = 0;
00093 res->count = 0;
00094 res->grffile = grffile;
00095 }
00096
00097
00098 SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
00099 {
00100 ResolverObject object;
00101 const SpriteGroup *group;
00102
00103 NewCanalResolver(&object, tile, _water_feature[feature].grffile);
00104
00105 group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
00106 if (group == NULL) return 0;
00107
00108 return group->GetResult();
00109 }