newgrf_canal.cpp
00001
00002
00003 #include "stdafx.h"
00004 #include "openttd.h"
00005 #include "variables.h"
00006 #include "landscape.h"
00007 #include "debug.h"
00008 #include "newgrf.h"
00009 #include "newgrf_callbacks.h"
00010 #include "newgrf_commons.h"
00011 #include "newgrf_spritegroup.h"
00012 #include "newgrf_canal.h"
00013 #include "tile_map.h"
00014 #include "water_map.h"
00015
00016
00018 WaterFeature _water_feature[CF_END];
00019
00020
00021
00022
00023 static uint32 CanalGetRandomBits(const ResolverObject *object)
00024 {
00025
00026 return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
00027 }
00028
00029
00030 static uint32 CanalGetTriggers(const ResolverObject *object)
00031 {
00032 return 0;
00033 }
00034
00035
00036 static void CanalSetTriggers(const ResolverObject *object, int triggers)
00037 {
00038 return;
00039 }
00040
00041
00042 static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00043 {
00044 TileIndex tile = object->u.canal.tile;
00045
00046 switch (variable) {
00047 case 0x80:
00048 return GetTileZ(tile) / TILE_HEIGHT;
00049
00050 case 0x81:
00051 return GetTerrainType(tile);
00052
00053 case 0x83:
00054 return GetWaterTileRandomBits(tile);
00055 }
00056
00057 DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
00058
00059 *available = false;
00060 return 0;
00061 }
00062
00063
00064 static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const SpriteGroup *group)
00065 {
00066 if (group->g.real.num_loaded == 0) return NULL;
00067
00068 return group->g.real.loaded[0];
00069 }
00070
00071
00072 static void NewCanalResolver(ResolverObject *res, TileIndex tile)
00073 {
00074 res->GetRandomBits = &CanalGetRandomBits;
00075 res->GetTriggers = &CanalGetTriggers;
00076 res->SetTriggers = &CanalSetTriggers;
00077 res->GetVariable = &CanalGetVariable;
00078 res->ResolveReal = &CanalResolveReal;
00079
00080 res->u.canal.tile = tile;
00081
00082 res->callback = CBID_NO_CALLBACK;
00083 res->callback_param1 = 0;
00084 res->callback_param2 = 0;
00085 res->last_value = 0;
00086 res->trigger = 0;
00087 res->reseed = 0;
00088 }
00089
00090
00091 SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
00092 {
00093 ResolverObject object;
00094 const SpriteGroup *group;
00095
00096 NewCanalResolver(&object, tile);
00097
00098 group = Resolve(_water_feature[feature].group, &object);
00099 if (group == NULL || group->type != SGT_RESULT) return 0;
00100
00101 return group->g.result.sprite;
00102 }