newgrf_canal.cpp
Go to the documentation of this file.00001
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00012 #include "stdafx.h"
00013 #include "debug.h"
00014 #include "newgrf_commons.h"
00015 #include "newgrf_spritegroup.h"
00016 #include "newgrf_canal.h"
00017 #include "water_map.h"
00018
00019
00021 WaterFeature _water_feature[CF_END];
00022
00023
00024
00025
00026 static uint32 CanalGetRandomBits(const ResolverObject *object)
00027 {
00028
00029 return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
00030 }
00031
00032
00033 static uint32 CanalGetTriggers(const ResolverObject *object)
00034 {
00035 return 0;
00036 }
00037
00038
00039 static void CanalSetTriggers(const ResolverObject *object, int triggers)
00040 {
00041 return;
00042 }
00043
00044
00045 static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00046 {
00047 TileIndex tile = object->u.canal.tile;
00048
00049 switch (variable) {
00050
00051 case 0x80: return GetTileZ(tile) / TILE_HEIGHT;
00052
00053
00054 case 0x81: return GetTerrainType(tile);
00055
00056
00057 case 0x83: return GetWaterTileRandomBits(tile);
00058 }
00059
00060 DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
00061
00062 *available = false;
00063 return UINT_MAX;
00064 }
00065
00066
00067 static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
00068 {
00069 if (group->num_loaded == 0) return NULL;
00070
00071 return group->loaded[0];
00072 }
00073
00074
00075 static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
00076 {
00077 res->GetRandomBits = &CanalGetRandomBits;
00078 res->GetTriggers = &CanalGetTriggers;
00079 res->SetTriggers = &CanalSetTriggers;
00080 res->GetVariable = &CanalGetVariable;
00081 res->ResolveReal = &CanalResolveReal;
00082
00083 res->u.canal.tile = tile;
00084
00085 res->callback = CBID_NO_CALLBACK;
00086 res->callback_param1 = 0;
00087 res->callback_param2 = 0;
00088 res->last_value = 0;
00089 res->trigger = 0;
00090 res->reseed = 0;
00091 res->count = 0;
00092 res->grffile = grffile;
00093 }
00094
00095
00096 SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
00097 {
00098 ResolverObject object;
00099 const SpriteGroup *group;
00100
00101 NewCanalResolver(&object, tile, _water_feature[feature].grffile);
00102
00103 group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
00104 if (group == NULL) return 0;
00105
00106 return group->GetResult();
00107 }