newgrf_canal.cpp
Go to the documentation of this file.00001
00002
00005 #include "stdafx.h"
00006 #include "core/overflowsafe_type.hpp"
00007 #include "tile_type.h"
00008 #include "debug.h"
00009 #include "newgrf_commons.h"
00010 #include "newgrf_spritegroup.h"
00011 #include "newgrf_canal.h"
00012 #include "tile_map.h"
00013 #include "water_map.h"
00014
00015
00017 WaterFeature _water_feature[CF_END];
00018
00019
00020
00021
00022 static uint32 CanalGetRandomBits(const ResolverObject *object)
00023 {
00024
00025 return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
00026 }
00027
00028
00029 static uint32 CanalGetTriggers(const ResolverObject *object)
00030 {
00031 return 0;
00032 }
00033
00034
00035 static void CanalSetTriggers(const ResolverObject *object, int triggers)
00036 {
00037 return;
00038 }
00039
00040
00041 static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00042 {
00043 TileIndex tile = object->u.canal.tile;
00044
00045 switch (variable) {
00046 case 0x80:
00047 return GetTileZ(tile) / TILE_HEIGHT;
00048
00049 case 0x81:
00050 return GetTerrainType(tile);
00051
00052 case 0x83:
00053 return GetWaterTileRandomBits(tile);
00054 }
00055
00056 DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
00057
00058 *available = false;
00059 return 0;
00060 }
00061
00062
00063 static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const SpriteGroup *group)
00064 {
00065 if (group->g.real.num_loaded == 0) return NULL;
00066
00067 return group->g.real.loaded[0];
00068 }
00069
00070
00071 static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
00072 {
00073 res->GetRandomBits = &CanalGetRandomBits;
00074 res->GetTriggers = &CanalGetTriggers;
00075 res->SetTriggers = &CanalSetTriggers;
00076 res->GetVariable = &CanalGetVariable;
00077 res->ResolveReal = &CanalResolveReal;
00078
00079 res->u.canal.tile = tile;
00080
00081 res->callback = CBID_NO_CALLBACK;
00082 res->callback_param1 = 0;
00083 res->callback_param2 = 0;
00084 res->last_value = 0;
00085 res->trigger = 0;
00086 res->reseed = 0;
00087 res->count = 0;
00088 res->grffile = grffile;
00089 }
00090
00091
00092 SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
00093 {
00094 ResolverObject object;
00095 const SpriteGroup *group;
00096
00097 NewCanalResolver(&object, tile, _water_feature[feature].grffile);
00098
00099 group = Resolve(_water_feature[feature].group, &object);
00100 if (group == NULL || group->type != SGT_RESULT) return 0;
00101
00102 return group->g.result.sprite;
00103 }