C++ cLuaState::WalkToValue方法代码示例

bool cPrefabPiecePool::ReadConnectorsCubesetVer1(
	const AString & a_FileName,
	cLuaState & a_LuaState,
	const AString & a_PieceName,
	cPrefab * a_Prefab,
	bool a_LogWarnings
)
{
	// Get the Connectors subtable:
	auto conns = a_LuaState.WalkToValue("Connectors");
	if (!conns.IsValid())
	{
		CONDWARNING(a_LogWarnings, "Cannot load piece %s from file %s, it has no connectors definition.", a_PieceName.c_str(), a_FileName.c_str());
		return false;
	}

	// Iterate over all items in the Connectors table:
	int idx = 1;
	bool res = true;
	while (true)
	{
		lua_pushinteger(a_LuaState, idx);  // stk: [Connectors] [idx]
		lua_gettable(a_LuaState, -2);      // stk: [Connectors] [conn]
		if (!lua_istable(a_LuaState, -1))
		{
			// The connector is not present, we've iterated over all items
			lua_pop(a_LuaState, 1);  // stk: [Connectors]
			break;
		}
		int Type = 0, RelX = 0, RelY = 0, RelZ = 0;
		AString DirectionStr;
		cPiece::cConnector::eDirection Direction = cPiece::cConnector::dirYM;
		if (
			!a_LuaState.GetNamedValue("Type",      Type) ||
			!a_LuaState.GetNamedValue("RelX",      RelX) ||
			!a_LuaState.GetNamedValue("RelY",      RelY) ||
			!a_LuaState.GetNamedValue("RelZ",      RelZ) ||
			!a_LuaState.GetNamedValue("Direction", DirectionStr) ||
			!cPiece::cConnector::StringToDirection(DirectionStr, Direction)
		)
		{
			CONDWARNING(a_LogWarnings, "Piece %s in file %s has a malformed Connector at index %d ({%d, %d, %d}, type %d, direction %s). Skipping the connector.",
				a_PieceName.c_str(), a_FileName.c_str(), idx, RelX, RelY, RelZ, Type, DirectionStr.c_str()
			);
			res = false;
			lua_pop(a_LuaState, 1);  // stk: [Connectors]
			idx += 1;
			continue;
		}
		a_Prefab->AddConnector(RelX, RelY, RelZ, Direction, Type);
		lua_pop(a_LuaState, 1);  // stk: [Connectors]
		idx += 1;
	}
	return res;
}

bool cPrefabPiecePool::ApplyPieceMetadataCubesetVer1(
	const AString & a_FileName,
	cLuaState & a_LuaState,
	const AString & a_PieceName,
	cPrefab * a_Prefab,
	bool a_LogWarnings
)
{
	// Push the Metadata table on top of the Lua stack:
	auto md = a_LuaState.WalkToValue("Metadata");
	if (!md.IsValid())
	{
		return false;
	}

	// Get the values:
	int AddWeightIfSame = 0, DefaultWeight = 100, MoveToGround = 0, ShouldExpandFloor = 0;
	AString DepthWeight, MergeStrategy;
	a_LuaState.GetNamedValue("AddWeightIfSame",   AddWeightIfSame);
	a_LuaState.GetNamedValue("DefaultWeight",     DefaultWeight);
	a_LuaState.GetNamedValue("DepthWeight",       DepthWeight);
	a_LuaState.GetNamedValue("MergeStrategy",     MergeStrategy);
	a_LuaState.GetNamedValue("MoveToGround",      MoveToGround);
	a_LuaState.GetNamedValue("ShouldExpandFloor", ShouldExpandFloor);

	// Apply the values:
	a_Prefab->SetAddWeightIfSame(AddWeightIfSame);
	a_Prefab->SetDefaultWeight(DefaultWeight);
	a_Prefab->ParseDepthWeight(DepthWeight.c_str());
	auto msmap = GetMergeStrategyMap();
	auto strategy = msmap.find(MergeStrategy);
	if (strategy == msmap.end())
	{
		CONDWARNING(a_LogWarnings, "Unknown merge strategy (\"%s\") specified for piece %s in file %s. Using msSpongePrint instead.",
			MergeStrategy.c_str(), a_PieceName.c_str(), a_FileName.c_str()
		);
		a_Prefab->SetMergeStrategy(cBlockArea::msSpongePrint);
	}
	else
	{
		a_Prefab->SetMergeStrategy(strategy->second);
	}
	a_Prefab->SetMoveToGround(MoveToGround != 0);
	a_Prefab->SetExtendFloor(ShouldExpandFloor != 0);

	return true;
}

bool cPrefabPiecePool::LoadFromCubesetFileVer1(const AString & a_FileName, cLuaState & a_LuaState, bool a_LogWarnings)
{
	// Load the metadata:
	ApplyPoolMetadataCubesetVer1(a_FileName, a_LuaState, a_LogWarnings);

	// Push the Cubeset.Pieces global value on the stack:
	lua_getglobal(a_LuaState, "_G");
	cLuaState::cStackValue stk(a_LuaState);
	auto pieces = a_LuaState.WalkToValue("Cubeset.Pieces");
	if (!pieces.IsValid() || !lua_istable(a_LuaState, -1))
	{
		CONDWARNING(a_LogWarnings, "The cubeset file %s doesn't contain any pieces", a_FileName.c_str());
		return false;
	}

	// Iterate over all items in the Cubeset.Pieces value:
	int idx = 1;
	bool res = true;
	while (true)
	{
		lua_pushinteger(a_LuaState, idx);  // stk: [Pieces] [idx]
		lua_gettable(a_LuaState, -2);      // stk: [Pieces] [PieceItem]
		if (!lua_istable(a_LuaState, -1))
		{
			// The PieceItem is not present, we've iterated over all items
			lua_pop(a_LuaState, 1);  // stk: [Pieces]
			break;
		}
		if (!LoadCubesetPieceVer1(a_FileName, a_LuaState, idx, a_LogWarnings))
		{
			res = false;
		}
		lua_pop(a_LuaState, 1);  // stk: [Pieces]
		idx += 1;
	}
	return res;
}

bool cPrefabPiecePool::ApplyPoolMetadataCubesetVer1(
	const AString & a_FileName,
	cLuaState & a_LuaState,
	bool a_LogWarnings
)
{
	// Push the Cubeset.Metadata table on top of the Lua stack:
	lua_getglobal(a_LuaState, "_G");
	auto md = a_LuaState.WalkToValue("Cubeset.Metadata");
	if (!md.IsValid())
	{
		CONDWARNING(a_LogWarnings, "Cannot load cubeset from file %s: Cubeset.Metadata table is missing", a_FileName.c_str());
		return false;
	}

	// Set the metadata values to defaults:
	m_MinDensity = 100;
	m_MaxDensity = 100;
	m_VillageRoadBlockType = E_BLOCK_GRAVEL;
	m_VillageRoadBlockMeta = 0;
	m_VillageWaterRoadBlockType = E_BLOCK_PLANKS;
	m_VillageWaterRoadBlockMeta = 0;

	// Read the metadata values:
	a_LuaState.GetNamedValue("IntendedUse",               m_IntendedUse);
	a_LuaState.GetNamedValue("MaxDensity",                m_MaxDensity);
	a_LuaState.GetNamedValue("MinDensity",                m_MinDensity);
	a_LuaState.GetNamedValue("VillageRoadBlockType",      m_VillageRoadBlockType);
	a_LuaState.GetNamedValue("VillageRoadBlockMeta",      m_VillageRoadBlockMeta);
	a_LuaState.GetNamedValue("VillageWaterRoadBlockType", m_VillageWaterRoadBlockType);
	a_LuaState.GetNamedValue("VillageWaterRoadBlockMeta", m_VillageWaterRoadBlockMeta);
	AString allowedBiomes;
	if (a_LuaState.GetNamedValue("AllowedBiomes", allowedBiomes))
	{
		auto biomes = StringSplitAndTrim(allowedBiomes, ",");
		for (const auto & biome: biomes)
		{
			EMCSBiome b = StringToBiome(biome);
			if (b == biInvalidBiome)
			{
				CONDWARNING(a_LogWarnings, "Invalid biome (\"%s\") specified in AllowedBiomes in cubeset file %s. Skipping the biome.",
					biome.c_str(), a_FileName.c_str()
				);
				continue;
			}
			m_AllowedBiomes.insert(b);
		}
	}
	else
	{
		// All biomes are allowed:
		for (int b = biFirstBiome; b <= biMaxBiome; b++)
		{
			m_AllowedBiomes.insert(static_cast<EMCSBiome>(b));
		}
		for (int b = biFirstVariantBiome; b <= biMaxVariantBiome; b++)
		{
			m_AllowedBiomes.insert(static_cast<EMCSBiome>(b));
		}
	}
	return true;
}

bool cPrefabPiecePool::ReadPieceMetadataCubesetVer1(
	const AString & a_FileName,
	cLuaState & a_LuaState,
	const AString & a_PieceName,
	cPrefab * a_Prefab,
	bool a_LogWarnings
)
{
	// Push the Metadata table on top of the Lua stack:
	auto md = a_LuaState.WalkToValue("Metadata");
	if (!md.IsValid())
	{
		return false;
	}

	// Get the values:
	int AddWeightIfSame = 0, DefaultWeight = 100, MoveToGround = 0;
	AString DepthWeight, MergeStrategy, VerticalLimit, VerticalStrategy;
	a_LuaState.GetNamedValue("AddWeightIfSame",  AddWeightIfSame);
	a_LuaState.GetNamedValue("DefaultWeight",    DefaultWeight);
	a_LuaState.GetNamedValue("DepthWeight",      DepthWeight);
	a_LuaState.GetNamedValue("MergeStrategy",    MergeStrategy);
	a_LuaState.GetNamedValue("MoveToGround",     MoveToGround);
	a_LuaState.GetNamedValue("VerticalLimit",    VerticalLimit);
	a_LuaState.GetNamedValue("VerticalStrategy", VerticalStrategy);

	// Apply the values:
	a_Prefab->SetAddWeightIfSame(AddWeightIfSame);
	a_Prefab->SetDefaultWeight(DefaultWeight);
	a_Prefab->ParseDepthWeight(DepthWeight.c_str());
	auto msmap = GetMergeStrategyMap();
	auto strategy = msmap.find(MergeStrategy);
	if (strategy == msmap.end())
	{
		CONDWARNING(a_LogWarnings, "Unknown merge strategy (\"%s\") specified for piece %s in file %s. Using msSpongePrint instead.",
			MergeStrategy.c_str(), a_PieceName.c_str(), a_FileName.c_str()
		);
		a_Prefab->SetMergeStrategy(cBlockArea::msSpongePrint);
	}
	else
	{
		a_Prefab->SetMergeStrategy(strategy->second);
	}
	a_Prefab->SetMoveToGround(MoveToGround != 0);

	AString ExpandFloorStrategyStr;
	if (!a_LuaState.GetNamedValue("ExpandFloorStrategy", ExpandFloorStrategyStr))
	{
		// Check the older variant for ExpandFloorStrategy, ShouldExpandFloor:
		int ShouldExpandFloor;
		if (a_LuaState.GetNamedValue("ShouldExpandFloor", ShouldExpandFloor))
		{
			LOG("Piece \"%s\" in file \"%s\" is using the old \"ShouldExpandFloor\" attribute. Use the new \"ExpandFloorStrategy\" attribute instead for more options.",
				a_PieceName.c_str(), a_FileName.c_str()
			);
			a_Prefab->SetExtendFloorStrategy((ShouldExpandFloor != 0) ? cPrefab::efsRepeatBottomTillNonAir : cPrefab::efsNone);
		}
	}
	else
	{
		auto lcExpandFloorStrategyStr = StrToLower(ExpandFloorStrategyStr);
		if (lcExpandFloorStrategyStr == "repeatbottomtillnonair")
		{
			a_Prefab->SetExtendFloorStrategy(cPrefab::efsRepeatBottomTillNonAir);
		}
		else if (lcExpandFloorStrategyStr == "repeatbottomtillsolid")
		{
			a_Prefab->SetExtendFloorStrategy(cPrefab::efsRepeatBottomTillSolid);
		}
		else
		{
			if (lcExpandFloorStrategyStr != "none")
			{
				LOGWARNING("Piece \"%s\" in file \"%s\" is using an unknown \"ExpandFloorStrategy\" attribute value: \"%s\"",
					a_PieceName.c_str(), a_FileName.c_str(), ExpandFloorStrategyStr.c_str()
				);
			}
			a_Prefab->SetExtendFloorStrategy(cPrefab::efsNone);
		}
	}
	if (!VerticalLimit.empty())
	{
		if (!a_Prefab->SetVerticalLimitFromString(VerticalLimit, a_LogWarnings))
		{
			CONDWARNING(a_LogWarnings, "Unknown VerticalLimit (\"%s\") specified for piece %s in file %s. Using no limit instead.",
				VerticalLimit.c_str(), a_PieceName.c_str(), a_FileName.c_str()
			);
		}
	}
	a_Prefab->SetVerticalStrategyFromString(VerticalStrategy, a_LogWarnings);

	return true;
}