Remove unused MapBlock functionality

src/clientiface.cpp

@@ -311,7 +311,7 @@ void RemoteClient::GetNextBlocks (
 				block->resetUsageTimer();
 
 				// Check whether the block exists (with data)
-				if (block->isDummy() || !block->isGenerated())
+				if (!block->isGenerated())
 					block_not_found = true;
 
 				/*

src/emerge.cpp

@@ -596,7 +596,7 @@ EmergeAction EmergeThread::getBlockOrStartGen(
 
 	// 1). Attempt to fetch block from memory
 	*block = m_map->getBlockNoCreateNoEx(pos);
-	if (*block && !(*block)->isDummy()) {
+	if (*block) {
 		if ((*block)->isGenerated())
 			return EMERGE_FROM_MEMORY;
 	} else {

src/main.cpp

@@ -1131,6 +1131,7 @@ static bool recompress_map_database(const GameParams &game_params, const Setting
 		iss.str(data);
 		iss.clear();
 
+		{
 			MapBlock mb(nullptr, v3s16(0,0,0), &server);
 			u8 ver = readU8(iss);
 			mb.deSerialize(iss, ver, true);
@@ -1139,6 +1140,7 @@ static bool recompress_map_database(const GameParams &game_params, const Setting
 			oss.clear();
 			writeU8(oss, serialize_as_ver);
 			mb.serialize(oss, serialize_as_ver, true, -1);
+		}
 
 		db->saveBlock(*it, oss.str());
 

src/map.cpp

@@ -158,10 +158,9 @@ MapNode Map::getNode(v3s16 p, bool *is_valid_position)
 	}
 
 	v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-	bool is_valid_p;
+	MapNode node = block->getNodeNoCheck(relpos);
-	MapNode node = block->getNodeNoCheck(relpos, &is_valid_p);
 	if (is_valid_position != NULL)
-		*is_valid_position = is_valid_p;
+		*is_valid_position = true;
 	return node;
 }
 
@@ -172,10 +171,9 @@ static void set_node_in_block(MapBlock *block, v3s16 relpos, MapNode n)
 		const NodeDefManager *nodedef = block->getParent()->getNodeDefManager();
 		v3s16 blockpos = block->getPos();
 		v3s16 p = blockpos * MAP_BLOCKSIZE + relpos;
-		bool temp_bool;
 		errorstream<<"Not allowing to place CONTENT_IGNORE"
 				<<" while trying to replace \""
-				<<nodedef->get(block->getNodeNoCheck(relpos, &temp_bool)).name
+				<<nodedef->get(block->getNodeNoCheck(relpos)).name
 				<<"\" at "<<PP(p)<<" (block "<<PP(blockpos)<<")"<<std::endl;
 		return;
 	}
@@ -200,12 +198,10 @@ void Map::addNodeAndUpdate(v3s16 p, MapNode n,
 
 	v3s16 blockpos = getNodeBlockPos(p);
 	MapBlock *block = getBlockNoCreate(blockpos);
-	if (block->isDummy())
-		throw InvalidPositionException();
 	v3s16 relpos = p - blockpos * MAP_BLOCKSIZE;
 
 	// This is needed for updating the lighting
-	MapNode oldnode = block->getNodeUnsafe(relpos);
+	MapNode oldnode = block->getNodeNoCheck(relpos);
 
 	// Remove node metadata
 	if (remove_metadata) {
@@ -1515,8 +1511,6 @@ MapBlock * ServerMap::createBlock(v3s16 p)
 
 	MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
 	if (block) {
-		if(block->isDummy())
-			block->unDummify();
 		return block;
 	}
 	// Create blank
@@ -1529,7 +1523,7 @@ MapBlock * ServerMap::emergeBlock(v3s16 p, bool create_blank)
 {
 	{
 		MapBlock *block = getBlockNoCreateNoEx(p);
-		if (block && !block->isDummy())
+		if (block)
 			return block;
 	}
 
@@ -1756,13 +1750,6 @@ bool ServerMap::saveBlock(MapBlock *block, MapDatabase *db, int compression_leve
 {
 	v3s16 p3d = block->getPos();
 
-	// Dummy blocks are not written
-	if (block->isDummy()) {
-		warningstream << "saveBlock: Not writing dummy block "
-			<< PP(p3d) << std::endl;
-		return true;
-	}
-
 	// Format used for writing
 	u8 version = SER_FMT_VER_HIGHEST_WRITE;
 
@@ -1962,7 +1949,7 @@ void MMVManip::initialEmerge(v3s16 blockpos_min, v3s16 blockpos_max,
 			TimeTaker timer2("emerge load", &emerge_load_time);
 
 			block = m_map->getBlockNoCreateNoEx(p);
-			if (!block || block->isDummy())
+			if (!block)
 				block_data_inexistent = true;
 			else
 				block->copyTo(*this);

src/mapblock.cpp

@@ -66,13 +66,13 @@ static const char *modified_reason_strings[] = {
 	MapBlock
 */
 
-MapBlock::MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef, bool dummy):
+MapBlock::MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef):
 		m_parent(parent),
 		m_pos(pos),
 		m_pos_relative(pos * MAP_BLOCKSIZE),
-		m_gamedef(gamedef)
+		m_gamedef(gamedef),
+		data(new MapNode[nodecount])
 {
-	if (!dummy)
 	reallocate();
 }
 
@@ -102,11 +102,6 @@ MapNode MapBlock::getNodeParent(v3s16 p, bool *is_valid_position)
 	if (!isValidPosition(p))
 		return m_parent->getNode(getPosRelative() + p, is_valid_position);
 
-	if (!data) {
-		if (is_valid_position)
-			*is_valid_position = false;
-		return {CONTENT_IGNORE};
-	}
 	if (is_valid_position)
 		*is_valid_position = true;
 	return data[p.Z * zstride + p.Y * ystride + p.X];
@@ -161,11 +156,6 @@ void MapBlock::actuallyUpdateDayNightDiff()
 	// Running this function un-expires m_day_night_differs
 	m_day_night_differs_expired = false;
 
-	if (!data) {
-		m_day_night_differs = false;
-		return;
-	}
-
 	bool differs = false;
 
 	/*
@@ -209,12 +199,6 @@ void MapBlock::actuallyUpdateDayNightDiff()
 
 void MapBlock::expireDayNightDiff()
 {
-	if (!data) {
-		m_day_night_differs = false;
-		m_day_night_differs_expired = false;
-		return;
-	}
-
 	m_day_night_differs_expired = true;
 }
 
@@ -339,9 +323,6 @@ void MapBlock::serialize(std::ostream &os_compressed, u8 version, bool disk, int
 	if(!ser_ver_supported(version))
 		throw VersionMismatchException("ERROR: MapBlock format not supported");
 
-	if (!data)
-		throw SerializationError("ERROR: Not writing dummy block.");
-
 	FATAL_ERROR_IF(version < SER_FMT_VER_LOWEST_WRITE, "Serialisation version error");
 
 	std::ostringstream os_raw(std::ios_base::binary);
@@ -446,10 +427,6 @@ void MapBlock::serialize(std::ostream &os_compressed, u8 version, bool disk, int
 
 void MapBlock::serializeNetworkSpecific(std::ostream &os)
 {
-	if (!data) {
-		throw SerializationError("ERROR: Not writing dummy block.");
-	}
-
 	writeU8(os, 2); // version
 }
 
@@ -861,12 +838,6 @@ std::string analyze_block(MapBlock *block)
 
 	desc<<"lighting_complete: "<<block->getLightingComplete()<<", ";
 
-	if(block->isDummy())
-	{
-		desc<<"Dummy, ";
-	}
-	else
-	{
 	bool full_ignore = true;
 	bool some_ignore = false;
 	bool full_air = true;
@@ -906,7 +877,6 @@ std::string analyze_block(MapBlock *block)
 		desc<<ss.str().substr(0, ss.str().size()-2);
 
 	desc<<"}, ";
-	}
 
 	return desc.str().substr(0, desc.str().size()-2);
 }

src/mapblock.h

@@ -73,7 +73,7 @@ class VoxelManipulator;
 class MapBlock
 {
 public:
-	MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef, bool dummy=false);
+	MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef);
 	~MapBlock();
 
 	/*virtual u16 nodeContainerId() const
@@ -88,11 +88,8 @@ public:
 
 	void reallocate()
 	{
-		delete[] data;
-		data = new MapNode[nodecount];
 		for (u32 i = 0; i < nodecount; i++)
 			data[i] = MapNode(CONTENT_IGNORE);
-
 		raiseModified(MOD_STATE_WRITE_NEEDED, MOD_REASON_REALLOCATE);
 	}
 
@@ -140,17 +137,6 @@ public:
 	//// Flags
 	////
 
-	inline bool isDummy() const
-	{
-		return !data;
-	}
-
-	inline void unDummify()
-	{
-		assert(isDummy()); // Pre-condition
-		reallocate();
-	}
-
 	// is_underground getter/setter
 	inline bool getIsUnderground()
 	{
@@ -242,8 +228,7 @@ public:
 
 	inline bool isValidPosition(s16 x, s16 y, s16 z)
 	{
-		return data
+		return x >= 0 && x < MAP_BLOCKSIZE
-			&& x >= 0 && x < MAP_BLOCKSIZE
 			&& y >= 0 && y < MAP_BLOCKSIZE
 			&& z >= 0 && z < MAP_BLOCKSIZE;
 	}
@@ -274,7 +259,7 @@ public:
 		return getNode(p.X, p.Y, p.Z, &is_valid);
 	}
 
-	inline void setNode(s16 x, s16 y, s16 z, MapNode & n)
+	inline void setNode(s16 x, s16 y, s16 z, MapNode n)
 	{
 		if (!isValidPosition(x, y, z))
 			throw InvalidPositionException();
@@ -283,7 +268,7 @@ public:
 		raiseModified(MOD_STATE_WRITE_NEEDED, MOD_REASON_SET_NODE);
 	}
 
-	inline void setNode(v3s16 p, MapNode & n)
+	inline void setNode(v3s16 p, MapNode n)
 	{
 		setNode(p.X, p.Y, p.Z, n);
 	}
@@ -292,46 +277,23 @@ public:
 	//// Non-checking variants of the above
 	////
 
-	inline MapNode getNodeNoCheck(s16 x, s16 y, s16 z, bool *valid_position)
+	inline MapNode getNodeNoCheck(s16 x, s16 y, s16 z)
-	{
-		*valid_position = data != nullptr;
-		if (!*valid_position)
-			return {CONTENT_IGNORE};
-
-		return data[z * zstride + y * ystride + x];
-	}
-
-	inline MapNode getNodeNoCheck(v3s16 p, bool *valid_position)
-	{
-		return getNodeNoCheck(p.X, p.Y, p.Z, valid_position);
-	}
-
-	////
-	//// Non-checking, unsafe variants of the above
-	//// MapBlock must be loaded by another function in the same scope/function
-	//// Caller must ensure that this is not a dummy block (by calling isDummy())
-	////
-
-	inline const MapNode &getNodeUnsafe(s16 x, s16 y, s16 z)
 	{
 		return data[z * zstride + y * ystride + x];
 	}
 
-	inline const MapNode &getNodeUnsafe(v3s16 &p)
+	inline MapNode getNodeNoCheck(v3s16 p)
 	{
-		return getNodeUnsafe(p.X, p.Y, p.Z);
+		return getNodeNoCheck(p.X, p.Y, p.Z);
 	}
 
-	inline void setNodeNoCheck(s16 x, s16 y, s16 z, MapNode & n)
+	inline void setNodeNoCheck(s16 x, s16 y, s16 z, MapNode n)
 	{
-		if (!data)
-			throw InvalidPositionException();
-
 		data[z * zstride + y * ystride + x] = n;
 		raiseModified(MOD_STATE_WRITE_NEEDED, MOD_REASON_SET_NODE_NO_CHECK);
 	}
 
-	inline void setNodeNoCheck(v3s16 p, MapNode & n)
+	inline void setNodeNoCheck(v3s16 p, MapNode n)
 	{
 		setNodeNoCheck(p.X, p.Y, p.Z, n);
 	}
@@ -432,12 +394,12 @@ public:
 	//// Node Timers
 	////
 
-	inline NodeTimer getNodeTimer(const v3s16 &p)
+	inline NodeTimer getNodeTimer(v3s16 p)
 	{
 		return m_node_timers.get(p);
 	}
 
-	inline void removeNodeTimer(const v3s16 &p)
+	inline void removeNodeTimer(v3s16 p)
 	{
 		m_node_timers.remove(p);
 	}
@@ -473,23 +435,6 @@ private:
 
 	void deSerialize_pre22(std::istream &is, u8 version, bool disk);
 
-	/*
-		Used only internally, because changes can't be tracked
-	*/
-
-	inline MapNode &getNodeRef(s16 x, s16 y, s16 z)
-	{
-		if (!isValidPosition(x, y, z))
-			throw InvalidPositionException();
-
-		return data[z * zstride + y * ystride + x];
-	}
-
-	inline MapNode &getNodeRef(v3s16 &p)
-	{
-		return getNodeRef(p.X, p.Y, p.Z);
-	}
-
 public:
 	/*
 		Public member variables
@@ -536,11 +481,7 @@ private:
 
 	IGameDef *m_gamedef;
 
-	/*
+	MapNode *const data;
-		If NULL, block is a dummy block.
-		Dummy blocks are used for caching not-found-on-disk blocks.
-	*/
-	MapNode *data = nullptr;
 
 	/*
 		- On the server, this is used for telling whether the
@@ -624,12 +565,12 @@ inline bool blockpos_over_max_limit(v3s16 p)
 /*
 	Returns the position of the block where the node is located
 */
-inline v3s16 getNodeBlockPos(const v3s16 &p)
+inline v3s16 getNodeBlockPos(v3s16 p)
 {
 	return getContainerPos(p, MAP_BLOCKSIZE);
 }
 
-inline void getNodeBlockPosWithOffset(const v3s16 &p, v3s16 &block, v3s16 &offset)
+inline void getNodeBlockPosWithOffset(v3s16 p, v3s16 &block, v3s16 &offset)
 {
 	getContainerPosWithOffset(p, MAP_BLOCKSIZE, block, offset);
 }

src/reflowscan.cpp

@@ -85,13 +85,12 @@ inline MapBlock *ReflowScan::lookupBlock(int x, int y, int z)
 inline bool ReflowScan::isLiquidFlowableTo(int x, int y, int z)
 {
 	// Tests whether (x,y,z) is a node to which liquid might flow.
-	bool valid_position;
 	MapBlock *block = lookupBlock(x, y, z);
 	if (block) {
 		int dx = (MAP_BLOCKSIZE + x) % MAP_BLOCKSIZE;
 		int dy = (MAP_BLOCKSIZE + y) % MAP_BLOCKSIZE;
 		int dz = (MAP_BLOCKSIZE + z) % MAP_BLOCKSIZE;
-		MapNode node = block->getNodeNoCheck(dx, dy, dz, &valid_position);
+		MapNode node = block->getNodeNoCheck(dx, dy, dz);
 		if (node.getContent() != CONTENT_IGNORE) {
 			const ContentFeatures &f = m_ndef->get(node);
 			// NOTE: No need to check for flowing nodes with lower liquid level
@@ -115,8 +114,6 @@ inline bool ReflowScan::isLiquidHorizontallyFlowable(int x, int y, int z)
 
 void ReflowScan::scanColumn(int x, int z)
 {
-	bool valid_position;
-
 	// Is the column inside a loaded block?
 	MapBlock *block = lookupBlock(x, 0, z);
 	if (!block)
@@ -129,7 +126,7 @@ void ReflowScan::scanColumn(int x, int z)
 	// Get the state from the node above the scanned block
 	bool was_ignore, was_liquid;
 	if (above) {
-		MapNode node = above->getNodeNoCheck(dx, 0, dz, &valid_position);
+		MapNode node = above->getNodeNoCheck(dx, 0, dz);
 		was_ignore = node.getContent() == CONTENT_IGNORE;
 		was_liquid = m_ndef->get(node).isLiquid();
 	} else {
@@ -141,7 +138,7 @@ void ReflowScan::scanColumn(int x, int z)
 
 	// Scan through the whole block
 	for (s16 y = MAP_BLOCKSIZE - 1; y >= 0; y--) {
-		MapNode node = block->getNodeNoCheck(dx, y, dz, &valid_position);
+		MapNode node = block->getNodeNoCheck(dx, y, dz);
 		const ContentFeatures &f = m_ndef->get(node);
 		bool is_ignore = node.getContent() == CONTENT_IGNORE;
 		bool is_liquid = f.isLiquid();
@@ -179,7 +176,7 @@ void ReflowScan::scanColumn(int x, int z)
 	// Check the node below the current block
 	MapBlock *below = lookupBlock(x, -1, z);
 	if (below) {
-		MapNode node = below->getNodeNoCheck(dx, MAP_BLOCKSIZE - 1, dz, &valid_position);
+		MapNode node = below->getNodeNoCheck(dx, MAP_BLOCKSIZE - 1, dz);
 		const ContentFeatures &f = m_ndef->get(node);
 		bool is_ignore = node.getContent() == CONTENT_IGNORE;
 		bool is_liquid = f.isLiquid();

src/serverenvironment.cpp

@@ -258,7 +258,6 @@ void LBMManager::applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp)
 	v3s16 pos;
 	MapNode n;
 	content_t c;
-	bool pos_valid; // dummy, we know it's valid
 	auto it = getLBMsIntroducedAfter(stamp);
 	for (; it != m_lbm_lookup.end(); ++it) {
 		// Cache previous version to speedup lookup which has a very high performance
@@ -269,7 +268,7 @@ void LBMManager::applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp)
 		for (pos.X = 0; pos.X < MAP_BLOCKSIZE; pos.X++)
 			for (pos.Y = 0; pos.Y < MAP_BLOCKSIZE; pos.Y++)
 				for (pos.Z = 0; pos.Z < MAP_BLOCKSIZE; pos.Z++) {
-					n = block->getNodeNoCheck(pos, &pos_valid);
+					n = block->getNodeNoCheck(pos);
 					c = n.getContent();
 
 					// If content_t are not matching perform an LBM lookup
@@ -850,7 +849,7 @@ public:
 	}
 	void apply(MapBlock *block, int &blocks_scanned, int &abms_run, int &blocks_cached)
 	{
-		if(m_aabms.empty() || block->isDummy())
+		if(m_aabms.empty())
 			return;
 
 		// Check the content type cache first
@@ -884,7 +883,7 @@ public:
 		for(p0.Y=0; p0.Y<MAP_BLOCKSIZE; p0.Y++)
 		for(p0.Z=0; p0.Z<MAP_BLOCKSIZE; p0.Z++)
 		{
-			const MapNode &n = block->getNodeUnsafe(p0);
+			const MapNode &n = block->getNodeNoCheck(p0);
 			content_t c = n.getContent();
 			// Cache content types as we go
 			if (!block->contents_cached && !block->do_not_cache_contents) {
@@ -920,7 +919,7 @@ public:
 						if (block->isValidPosition(p1)) {
 							// if the neighbor is found on the same map block
 							// get it straight from there
-							const MapNode &n = block->getNodeUnsafe(p1);
+							const MapNode &n = block->getNodeNoCheck(p1);
 							c = n.getContent();
 						} else {
 							// otherwise consult the map
@@ -1589,7 +1588,7 @@ ServerEnvironment::BlockStatus ServerEnvironment::getBlockStatus(v3s16 blockpos)
 		return BS_ACTIVE;
 
 	const MapBlock *block = m_map->getBlockNoCreateNoEx(blockpos);
-	if (block && !block->isDummy())
+	if (block)
 		return BS_LOADED;
 
 	if (m_map->isBlockInQueue(blockpos))

src/voxelalgorithms.cpp

@@ -256,8 +256,6 @@ void unspread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
 	// Data of the current neighbor
 	mapblock_v3 neighbor_block_pos;
 	relative_v3 neighbor_rel_pos;
-	// A dummy boolean
-	bool is_valid_position;
 	// Direction of the brightest neighbor of the node
 	direction source_dir;
 	while (from_nodes.next(current_light, current)) {
@@ -266,8 +264,7 @@ void unspread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
 		// There is no brightest neighbor
 		source_dir = 6;
 		// The current node
-		const MapNode &node = current.block->getNodeNoCheck(
+		const MapNode &node = current.block->getNodeNoCheck(current.rel_position);
-			current.rel_position, &is_valid_position);
 		ContentLightingFlags f = nodemgr->getLightingFlags(node);
 		// If the node emits light, it behaves like it had a
 		// brighter neighbor.
@@ -294,8 +291,7 @@ void unspread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
 				neighbor_block = current.block;
 			}
 			// Get the neighbor itself
-			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos,
+			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos);
-				&is_valid_position);
 			ContentLightingFlags neighbor_f = nodemgr->getLightingFlags(
 				neighbor.getContent());
 			u8 neighbor_light = neighbor.getLightRaw(bank, neighbor_f);
@@ -361,8 +357,6 @@ void spread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
 	// Position of the current neighbor.
 	mapblock_v3 neighbor_block_pos;
 	relative_v3 neighbor_rel_pos;
-	// A dummy boolean.
-	bool is_valid_position;
 	while (light_sources.next(spreading_light, current)) {
 		spreading_light--;
 		for (direction i = 0; i < 6; i++) {
@@ -384,8 +378,7 @@ void spread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
 				neighbor_block = current.block;
 			}
 			// Get the neighbor itself
-			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos,
+			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos);
-				&is_valid_position);
 			ContentLightingFlags f = nodemgr->getLightingFlags(neighbor);
 			if (f.light_propagates) {
 				// Light up the neighbor, if it has less light than it should.
@@ -445,10 +438,7 @@ bool is_sunlight_above(Map *map, v3s16 pos, const NodeDefManager *ndef)
 			sunlight = !node_block->getIsUnderground();
 		}
 	} else {
-		bool is_valid_position;
+		MapNode above = source_block->getNodeNoCheck(source_rel_pos);
-		MapNode above = source_block->getNodeNoCheck(source_rel_pos,
-			&is_valid_position);
-		if (is_valid_position) {
 		if (above.getContent() == CONTENT_IGNORE) {
 			// Trust heuristics
 			if (source_block->getIsUnderground()) {
@@ -463,7 +453,6 @@ bool is_sunlight_above(Map *map, v3s16 pos, const NodeDefManager *ndef)
 			}
 		}
 	}
-	}
 	return sunlight;
 }
 
@@ -504,14 +493,11 @@ void update_lighting_nodes(Map *map,
 			mapblock_v3 block_pos;
 			getNodeBlockPosWithOffset(p, block_pos, rel_pos);
 			MapBlock *block = map->getBlockNoCreateNoEx(block_pos);
-			if (block == NULL || block->isDummy()) {
+			if (block == NULL) {
 				continue;
 			}
 			// Get the new node
-			MapNode n = block->getNodeNoCheck(rel_pos, &is_valid_position);
+			MapNode n = block->getNodeNoCheck(rel_pos);
-			if (!is_valid_position) {
-				break;
-			}
 
 			// Light of the old node
 			u8 old_light = it->second.getLight(bank, ndef->getLightingFlags(it->second));
@@ -530,9 +516,8 @@ void update_lighting_nodes(Map *map,
 					new_light = f.light_source;
 					for (const v3s16 &neighbor_dir : neighbor_dirs) {
 						v3s16 p2 = p + neighbor_dir;
-						bool is_valid;
+						MapNode n2 = map->getNode(p2, &is_valid_position);
-						MapNode n2 = map->getNode(p2, &is_valid);
+						if (is_valid_position) {
-						if (is_valid) {
 							u8 spread = n2.getLight(bank, ndef->getLightingFlags(n2));
 							// If it is sure that the neighbor won't be
 							// unlighted, its light can spread to this node.
@@ -636,8 +621,7 @@ void update_lighting_nodes(Map *map,
 			const std::vector<ChangingLight> &lights = light_sources.lights[i];
 			for (std::vector<ChangingLight>::const_iterator it = lights.begin();
 					it < lights.end(); ++it) {
-				MapNode n = it->block->getNodeNoCheck(it->rel_position,
+				MapNode n = it->block->getNodeNoCheck(it->rel_position);
-					&is_valid_position);
 				n.setLight(bank, i, ndef->getLightingFlags(n));
 				it->block->setNodeNoCheck(it->rel_position, n);
 			}
@@ -696,7 +680,6 @@ void update_block_border_lighting(Map *map, MapBlock *block,
 	std::map<v3s16, MapBlock*> &modified_blocks)
 {
 	const NodeDefManager *ndef = map->getNodeDefManager();
-	bool is_valid_position;
 	for (LightBank bank : banks) {
 		// Since invalid light is not common, do not allocate
 		// memory if not needed.
@@ -729,8 +712,7 @@ void update_block_border_lighting(Map *map, MapBlock *block,
 				for (s32 x = a.MinEdge.X; x <= a.MaxEdge.X; x++)
 				for (s32 z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++)
 				for (s32 y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
-					MapNode n = b->getNodeNoCheck(x, y, z,
+					MapNode n = b->getNodeNoCheck(x, y, z);
-						&is_valid_position);
 					ContentLightingFlags f = ndef->getLightingFlags(n);
 					u8 light = n.getLight(bank, f);
 					// Sunlight is fixed
@@ -758,8 +740,7 @@ void update_block_border_lighting(Map *map, MapBlock *block,
 			const std::vector<ChangingLight> &lights = light_sources.lights[i];
 			for (std::vector<ChangingLight>::const_iterator it = lights.begin();
 					it < lights.end(); ++it) {
-				MapNode n = it->block->getNodeNoCheck(it->rel_position,
+				MapNode n = it->block->getNodeNoCheck(it->rel_position);
-					&is_valid_position);
 				n.setLight(bank, i, ndef->getLightingFlags(n));
 				it->block->setNodeNoCheck(it->rel_position, n);
 			}
@@ -842,8 +823,7 @@ void is_sunlight_above_block(Map *map, mapblock_v3 pos,
 	// sunlight may be even slower.
 	MapBlock *source_block = map->emergeBlock(source_block_pos, false);
 	// Trust only generated blocks.
-	if (source_block == NULL || source_block->isDummy()
+	if (source_block == NULL || !source_block->isGenerated()) {
-			|| !source_block->isGenerated()) {
 		// But if there is no block above, then use heuristics
 		bool sunlight = true;
 		MapBlock *node_block = map->getBlockNoCreateNoEx(pos);
@@ -856,14 +836,11 @@ void is_sunlight_above_block(Map *map, mapblock_v3 pos,
 		for (s16 x = 0; x < MAP_BLOCKSIZE; x++)
 			light[z][x] = sunlight;
 	} else {
-		// Dummy boolean, the position is valid.
-		bool is_valid_position;
 		// For each column:
 		for (s16 z = 0; z < MAP_BLOCKSIZE; z++)
 		for (s16 x = 0; x < MAP_BLOCKSIZE; x++) {
 			// Get the bottom block.
-			MapNode above = source_block->getNodeNoCheck(x, 0, z,
+			MapNode above = source_block->getNodeNoCheck(x, 0, z);
-				&is_valid_position);
 			ContentLightingFlags above_f = ndef->getLightingFlags(above);
 			light[z][x] = above.getLight(LIGHTBANK_DAY, above_f) == LIGHT_SUN;
 		}
@@ -886,13 +863,11 @@ bool propagate_block_sunlight(Map *map, const NodeDefManager *ndef,
 	bool modified = false;
 	// Get the block.
 	MapBlock *block = map->getBlockNoCreateNoEx(data->target_block);
-	if (block == NULL || block->isDummy()) {
+	if (block == NULL) {
 		// The work is done if the block does not contain data.
 		data->data.clear();
 		return false;
 	}
-	// Dummy boolean
-	bool is_valid;
 	// For each changing column of nodes:
 	size_t index;
 	for (index = 0; index < data->data.size(); index++) {
@@ -904,7 +879,7 @@ bool propagate_block_sunlight(Map *map, const NodeDefManager *ndef,
 			// Propagate sunlight.
 			// For each node downwards:
 			for (; current_pos.Y >= 0; current_pos.Y--) {
-				MapNode n = block->getNodeNoCheck(current_pos, &is_valid);
+				MapNode n = block->getNodeNoCheck(current_pos);
 				ContentLightingFlags f = ndef->getLightingFlags(n);
 				if (n.getLightRaw(LIGHTBANK_DAY, f) < LIGHT_SUN
 						&& f.sunlight_propagates) {
@@ -923,7 +898,7 @@ bool propagate_block_sunlight(Map *map, const NodeDefManager *ndef,
 			// Propagate shadow.
 			// For each node downwards:
 			for (; current_pos.Y >= 0; current_pos.Y--) {
-				MapNode n = block->getNodeNoCheck(current_pos, &is_valid);
+				MapNode n = block->getNodeNoCheck(current_pos);
 				ContentLightingFlags f = ndef->getLightingFlags(n);
 				if (n.getLightRaw(LIGHTBANK_DAY, f) == LIGHT_SUN) {
 					// The sunlight is no longer valid.
@@ -987,8 +962,6 @@ void finish_bulk_light_update(Map *map, mapblock_v3 minblock,
 	std::map<v3s16, MapBlock*> *modified_blocks)
 {
 	const NodeDefManager *ndef = map->getNodeDefManager();
-	// dummy boolean
-	bool is_valid;
 
 	// --- STEP 1: Do unlighting
 
@@ -1007,14 +980,14 @@ void finish_bulk_light_update(Map *map, mapblock_v3 minblock,
 	for (blockpos.Y = minblock.Y; blockpos.Y <= maxblock.Y; blockpos.Y++)
 	for (blockpos.Z = minblock.Z; blockpos.Z <= maxblock.Z; blockpos.Z++) {
 		MapBlock *block = map->getBlockNoCreateNoEx(blockpos);
-		if (!block || block->isDummy())
+		if (!block)
 			// Skip not existing blocks
 			continue;
 		// For each node in the block:
 		for (relpos.X = 0; relpos.X < MAP_BLOCKSIZE; relpos.X++)
 		for (relpos.Z = 0; relpos.Z < MAP_BLOCKSIZE; relpos.Z++)
 		for (relpos.Y = 0; relpos.Y < MAP_BLOCKSIZE; relpos.Y++) {
-			MapNode node = block->getNodeNoCheck(relpos.X, relpos.Y, relpos.Z, &is_valid);
+			MapNode node = block->getNodeNoCheck(relpos.X, relpos.Y, relpos.Z);
 			ContentLightingFlags f = ndef->getLightingFlags(node);
 
 			// For each light bank
@@ -1041,8 +1014,7 @@ void finish_bulk_light_update(Map *map, mapblock_v3 minblock,
 			const std::vector<ChangingLight> &lights = relight[b].lights[i];
 			for (std::vector<ChangingLight>::const_iterator it = lights.begin();
 					it < lights.end(); ++it) {
-				MapNode n = it->block->getNodeNoCheck(it->rel_position,
+				MapNode n = it->block->getNodeNoCheck(it->rel_position);
-					&is_valid);
 				n.setLight(bank, i, ndef->getLightingFlags(n));
 				it->block->setNodeNoCheck(it->rel_position, n);
 			}
@@ -1064,8 +1036,6 @@ void blit_back_with_light(Map *map, MMVManip *vm,
 	// Will hold sunlight data.
 	bool lights[MAP_BLOCKSIZE][MAP_BLOCKSIZE];
 	SunlightPropagationData data;
-	// Dummy boolean.
-	bool is_valid;
 
 	// --- STEP 1: reset everything to sunlight
 
@@ -1105,7 +1075,7 @@ void blit_back_with_light(Map *map, MMVManip *vm,
 	for (blockpos.Y = minblock.Y; blockpos.Y <= maxblock.Y; blockpos.Y++)
 	for (blockpos.Z = minblock.Z; blockpos.Z <= maxblock.Z; blockpos.Z++) {
 		MapBlock *block = map->getBlockNoCreateNoEx(blockpos);
-		if (!block || block->isDummy())
+		if (!block)
 			// Skip not existing blocks.
 			continue;
 		v3s16 offset = block->getPosRelative();
@@ -1117,7 +1087,7 @@ void blit_back_with_light(Map *map, MMVManip *vm,
 			for (relpos.Y = a.MinEdge.Y; relpos.Y <= a.MaxEdge.Y; relpos.Y++) {
 
 				// Get old and new node
-				MapNode oldnode = block->getNodeNoCheck(relpos, &is_valid);
+				MapNode oldnode = block->getNodeNoCheck(relpos);
 				ContentLightingFlags oldf = ndef->getLightingFlags(oldnode);
 				MapNode newnode = vm->getNodeNoExNoEmerge(relpos + offset);
 				ContentLightingFlags newf = ndef->getLightingFlags(newnode);
@@ -1164,10 +1134,6 @@ void blit_back_with_light(Map *map, MMVManip *vm,
 void fill_with_sunlight(MapBlock *block, const NodeDefManager *ndef,
 	bool light[MAP_BLOCKSIZE][MAP_BLOCKSIZE])
 {
-	if (block->isDummy())
-		return;
-	// dummy boolean
-	bool is_valid;
 	// For each column of nodes:
 	for (s16 z = 0; z < MAP_BLOCKSIZE; z++)
 	for (s16 x = 0; x < MAP_BLOCKSIZE; x++) {
@@ -1175,7 +1141,7 @@ void fill_with_sunlight(MapBlock *block, const NodeDefManager *ndef,
 		bool lig = light[z][x];
 		// For each node, downwards:
 		for (s16 y = MAP_BLOCKSIZE - 1; y >= 0; y--) {
-			MapNode n = block->getNodeNoCheck(x, y, z, &is_valid);
+			MapNode n = block->getNodeNoCheck(x, y, z);
 			// Ignore IGNORE nodes, these are not generated yet.
 			if (n.getContent() == CONTENT_IGNORE)
 				continue;
@@ -1197,7 +1163,7 @@ void fill_with_sunlight(MapBlock *block, const NodeDefManager *ndef,
 void repair_block_light(Map *map, MapBlock *block,
 	std::map<v3s16, MapBlock*> *modified_blocks)
 {
-	if (!block || block->isDummy())
+	if (!block)
 		return;
 	const NodeDefManager *ndef = map->getNodeDefManager();
 	// First queue is for day light, second is for night light.
@@ -1206,8 +1172,6 @@ void repair_block_light(Map *map, MapBlock *block,
 	// Will hold sunlight data.
 	bool lights[MAP_BLOCKSIZE][MAP_BLOCKSIZE];
 	SunlightPropagationData data;
-	// Dummy boolean.
-	bool is_valid;
 
 	// --- STEP 1: reset everything to sunlight
 
@@ -1245,7 +1209,7 @@ void repair_block_light(Map *map, MapBlock *block,
 		for (relpos.Y = a.MinEdge.Y; relpos.Y <= a.MaxEdge.Y; relpos.Y++) {
 
 			// Get node
-			MapNode node = block->getNodeNoCheck(relpos, &is_valid);
+			MapNode node = block->getNodeNoCheck(relpos);
 			ContentLightingFlags f = ndef->getLightingFlags(node);
 			// For each light bank
 			for (size_t b = 0; b < 2; b++) {