X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fnodedef.cpp;h=41956ca2eee094922e514bee6376f4c93c411dd7;hb=b38afc9311e235d2b90d61dbbcf1a18e549073a7;hp=e38061e30d1b9231b6a850235db91b6ef400e9ad;hpb=fd845f27f5b3e3c6587c472be76235567a7b934d;p=dragonfireclient.git

diff --git a/src/nodedef.cpp b/src/nodedef.cpp
index e38061e30..41956ca2e 100644
--- a/src/nodedef.cpp
+++ b/src/nodedef.cpp
@@ -1,6 +1,6 @@
 /*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
@@ -27,7 +27,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "log.h"
 #include "settings.h"
 #include "nameidmapping.h"
+#include "util/numeric.h"
 #include "util/serialize.h"
+//#include "profiler.h" // For TimeTaker
 
 /*
 	NodeBox
@@ -44,12 +46,17 @@ void NodeBox::reset()
 	wall_side = aabb3f(-BS/2, -BS/2, -BS/2, -BS/2+BS/16., BS/2, BS/2);
 }
 
-void NodeBox::serialize(std::ostream &os) const
+void NodeBox::serialize(std::ostream &os, u16 protocol_version) const
 {
-	writeU8(os, 1); // version
-	writeU8(os, type);
+	int version = protocol_version >= 21 ? 2 : 1;
+	writeU8(os, version);
 
-	if(type == NODEBOX_FIXED)
+	if (version == 1 && type == NODEBOX_LEVELED)
+		writeU8(os, NODEBOX_FIXED);
+	else
+		writeU8(os, type);
+
+	if(type == NODEBOX_FIXED || type == NODEBOX_LEVELED)
 	{
 		writeU16(os, fixed.size());
 		for(std::vector<aabb3f>::const_iterator
@@ -74,14 +81,14 @@ void NodeBox::serialize(std::ostream &os) const
 void NodeBox::deSerialize(std::istream &is)
 {
 	int version = readU8(is);
-	if(version != 1)
+	if(version < 1 || version > 2)
 		throw SerializationError("unsupported NodeBox version");
 
 	reset();
 
 	type = (enum NodeBoxType)readU8(is);
 
-	if(type == NODEBOX_FIXED)
+	if(type == NODEBOX_FIXED || type == NODEBOX_LEVELED)
 	{
 		u16 fixed_count = readU16(is);
 		while(fixed_count--)
@@ -106,27 +113,32 @@ void NodeBox::deSerialize(std::istream &is)
 /*
 	TileDef
 */
-	
-void TileDef::serialize(std::ostream &os) const
+
+void TileDef::serialize(std::ostream &os, u16 protocol_version) const
 {
-	writeU8(os, 0); // version
+	if(protocol_version >= 17)
+		writeU8(os, 1); 
+	else
+		writeU8(os, 0);
 	os<<serializeString(name);
 	writeU8(os, animation.type);
 	writeU16(os, animation.aspect_w);
 	writeU16(os, animation.aspect_h);
 	writeF1000(os, animation.length);
+	if(protocol_version >= 17)
+		writeU8(os, backface_culling);
 }
 
 void TileDef::deSerialize(std::istream &is)
 {
 	int version = readU8(is);
-	if(version != 0)
-		throw SerializationError("unsupported TileDef version");
 	name = deSerializeString(is);
 	animation.type = (TileAnimationType)readU8(is);
 	animation.aspect_w = readU16(is);
 	animation.aspect_h = readU16(is);
 	animation.length = readF1000(is);
+	if(version >= 1)
+		backface_culling = readU8(is);
 }
 
 /*
@@ -173,7 +185,7 @@ void ContentFeatures::reset()
 	has_after_destruct = false;
 	/*
 		Actual data
-		
+
 		NOTE: Most of this is always overridden by the default values given
 		      in builtin.lua
 	*/
@@ -199,10 +211,16 @@ void ContentFeatures::reset()
 	diggable = true;
 	climbable = false;
 	buildable_to = false;
+	rightclickable = true;
+	leveled = 0;
 	liquid_type = LIQUID_NONE;
 	liquid_alternative_flowing = "";
 	liquid_alternative_source = "";
 	liquid_viscosity = 0;
+	liquid_renewable = true;
+	freezemelt = "";
+	liquid_range = LIQUID_LEVEL_MAX+1;
+	drowning = 0;
 	light_source = 0;
 	damage_per_second = 0;
 	node_box = NodeBox();
@@ -214,9 +232,14 @@ void ContentFeatures::reset()
 	sound_dug = SimpleSoundSpec();
 }
 
-void ContentFeatures::serialize(std::ostream &os)
+void ContentFeatures::serialize(std::ostream &os, u16 protocol_version)
 {
-	writeU8(os, 5); // version
+	if(protocol_version < 14){
+		serializeOld(os, protocol_version);
+		return;
+	}
+
+	writeU8(os, 6); // version
 	os<<serializeString(name);
 	writeU16(os, groups.size());
 	for(ItemGroupList::const_iterator
@@ -228,10 +251,10 @@ void ContentFeatures::serialize(std::ostream &os)
 	writeF1000(os, visual_scale);
 	writeU8(os, 6);
 	for(u32 i=0; i<6; i++)
-		tiledef[i].serialize(os);
+		tiledef[i].serialize(os, protocol_version);
 	writeU8(os, CF_SPECIAL_COUNT);
 	for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
-		tiledef_special[i].serialize(os);
+		tiledef_special[i].serialize(os, protocol_version);
 	}
 	writeU8(os, alpha);
 	writeU8(os, post_effect_color.getAlpha());
@@ -253,22 +276,32 @@ void ContentFeatures::serialize(std::ostream &os)
 	os<<serializeString(liquid_alternative_flowing);
 	os<<serializeString(liquid_alternative_source);
 	writeU8(os, liquid_viscosity);
+	writeU8(os, liquid_renewable);
 	writeU8(os, light_source);
 	writeU32(os, damage_per_second);
-	node_box.serialize(os);
-	selection_box.serialize(os);
+	node_box.serialize(os, protocol_version);
+	selection_box.serialize(os, protocol_version);
 	writeU8(os, legacy_facedir_simple);
 	writeU8(os, legacy_wallmounted);
 	serializeSimpleSoundSpec(sound_footstep, os);
 	serializeSimpleSoundSpec(sound_dig, os);
 	serializeSimpleSoundSpec(sound_dug, os);
+	writeU8(os, rightclickable);
+	writeU8(os, drowning);
+	writeU8(os, leveled);
+	writeU8(os, liquid_range);
+	// Stuff below should be moved to correct place in a version that otherwise changes
+	// the protocol version
 }
 
 void ContentFeatures::deSerialize(std::istream &is)
 {
 	int version = readU8(is);
-	if(version != 5)
-		throw SerializationError("unsupported ContentFeatures version");
+	if(version != 6){
+		deSerializeOld(is, version);
+		return;
+	}
+
 	name = deSerializeString(is);
 	groups.clear();
 	u32 groups_size = readU16(is);
@@ -307,6 +340,7 @@ void ContentFeatures::deSerialize(std::istream &is)
 	liquid_alternative_flowing = deSerializeString(is);
 	liquid_alternative_source = deSerializeString(is);
 	liquid_viscosity = readU8(is);
+	liquid_renewable = readU8(is);
 	light_source = readU8(is);
 	damage_per_second = readU32(is);
 	node_box.deSerialize(is);
@@ -316,9 +350,15 @@ void ContentFeatures::deSerialize(std::istream &is)
 	deSerializeSimpleSoundSpec(sound_footstep, is);
 	deSerializeSimpleSoundSpec(sound_dig, is);
 	deSerializeSimpleSoundSpec(sound_dug, is);
+	rightclickable = readU8(is);
+	drowning = readU8(is);
+	leveled = readU8(is);
+	liquid_range = readU8(is);
 	// If you add anything here, insert it primarily inside the try-catch
 	// block to not need to increase the version.
 	try{
+		// Stuff below should be moved to correct place in a version that
+		// otherwise changes the protocol version
 	}catch(SerializationError &e) {};
 }
 
@@ -331,15 +371,28 @@ class CNodeDefManager: public IWritableNodeDefManager
 public:
 	void clear()
 	{
+		m_content_features.clear();
 		m_name_id_mapping.clear();
 		m_name_id_mapping_with_aliases.clear();
+		m_group_to_items.clear();
+		m_next_id = 0;
+
+		u32 initial_length = 0;
+		initial_length = MYMAX(initial_length, CONTENT_UNKNOWN + 1);
+		initial_length = MYMAX(initial_length, CONTENT_AIR + 1);
+		initial_length = MYMAX(initial_length, CONTENT_IGNORE + 1);
+		m_content_features.resize(initial_length);
 
-		for(u16 i=0; i<=MAX_CONTENT; i++)
+		// Set CONTENT_UNKNOWN
 		{
-			ContentFeatures &f = m_content_features[i];
-			f.reset(); // Reset to defaults
+			ContentFeatures f;
+			f.name = "unknown";
+			// Insert directly into containers
+			content_t c = CONTENT_UNKNOWN;
+			m_content_features[c] = f;
+			addNameIdMapping(c, f.name);
 		}
-		
+
 		// Set CONTENT_AIR
 		{
 			ContentFeatures f;
@@ -357,6 +410,7 @@ class CNodeDefManager: public IWritableNodeDefManager
 			m_content_features[c] = f;
 			addNameIdMapping(c, f.name);
 		}
+
 		// Set CONTENT_IGNORE
 		{
 			ContentFeatures f;
@@ -376,16 +430,6 @@ class CNodeDefManager: public IWritableNodeDefManager
 			addNameIdMapping(c, f.name);
 		}
 	}
-	// CONTENT_IGNORE = not found
-	content_t getFreeId()
-	{
-		for(u32 i=0; i<=0xffff; i++){
-			const ContentFeatures &f = m_content_features[i];
-			if(f.name == "")
-				return i;
-		}
-		return CONTENT_IGNORE;
-	}
 	CNodeDefManager()
 	{
 		clear();
@@ -396,16 +440,15 @@ class CNodeDefManager: public IWritableNodeDefManager
 	virtual IWritableNodeDefManager* clone()
 	{
 		CNodeDefManager *mgr = new CNodeDefManager();
-		for(u16 i=0; i<=MAX_CONTENT; i++)
-		{
-			mgr->set(i, get(i));
-		}
+		*mgr = *this;
 		return mgr;
 	}
 	virtual const ContentFeatures& get(content_t c) const
 	{
-		assert(c <= MAX_CONTENT);
-		return m_content_features[c];
+		if(c < m_content_features.size())
+			return m_content_features[c];
+		else
+			return m_content_features[CONTENT_UNKNOWN];
 	}
 	virtual const ContentFeatures& get(const MapNode &n) const
 	{
@@ -429,6 +472,7 @@ class CNodeDefManager: public IWritableNodeDefManager
 	virtual void getIds(const std::string &name, std::set<content_t> &result)
 			const
 	{
+		//TimeTaker t("getIds", NULL, PRECISION_MICRO);
 		if(name.substr(0,6) != "group:"){
 			content_t id = CONTENT_IGNORE;
 			if(getId(name, id))
@@ -436,61 +480,93 @@ class CNodeDefManager: public IWritableNodeDefManager
 			return;
 		}
 		std::string group = name.substr(6);
-		for(u16 id=0; id<=MAX_CONTENT; id++)
-		{
-			const ContentFeatures &f = m_content_features[id];
-			if(f.name == "") // Quickly discard undefined nodes
-				continue;
-			if(itemgroup_get(f.groups, group) != 0)
-				result.insert(id);
+
+		std::map<std::string, GroupItems>::const_iterator
+			i = m_group_to_items.find(group);
+		if (i == m_group_to_items.end())
+			return;
+
+		const GroupItems &items = i->second;
+		for (GroupItems::const_iterator j = items.begin();
+			j != items.end(); ++j) {
+			if ((*j).second != 0)
+				result.insert((*j).first);
 		}
+		//printf("getIds: %dus\n", t.stop());
 	}
 	virtual const ContentFeatures& get(const std::string &name) const
 	{
-		content_t id = CONTENT_IGNORE;
+		content_t id = CONTENT_UNKNOWN;
 		getId(name, id);
 		return get(id);
 	}
-	// IWritableNodeDefManager
-	virtual void set(content_t c, const ContentFeatures &def)
+	// returns CONTENT_IGNORE if no free ID found
+	content_t allocateId()
 	{
-		verbosestream<<"registerNode: registering content id \""<<c
-				<<"\": name=\""<<def.name<<"\""<<std::endl;
-		assert(c <= MAX_CONTENT);
-		// Don't allow redefining CONTENT_IGNORE (but allow air)
-		if(def.name == "ignore" || c == CONTENT_IGNORE){
-			infostream<<"registerNode: WARNING: Ignoring "
-					<<"CONTENT_IGNORE redefinition"<<std::endl;
-			return;
-		}
-		// Check that the special contents are not redefined as different id
-		// because it would mess up everything
-		if((def.name == "ignore" && c != CONTENT_IGNORE) ||
-			(def.name == "air" && c != CONTENT_AIR)){
-			errorstream<<"registerNode: IGNORING ERROR: "
-					<<"trying to register built-in type \""
-					<<def.name<<"\" as different id"<<std::endl;
-			return;
+		for(content_t id = m_next_id;
+				id >= m_next_id; // overflow?
+				++id){
+			while(id >= m_content_features.size()){
+				m_content_features.push_back(ContentFeatures());
+			}
+			const ContentFeatures &f = m_content_features[id];
+			if(f.name == ""){
+				m_next_id = id + 1;
+				return id;
+			}
 		}
-		m_content_features[c] = def;
-		if(def.name != "")
-			addNameIdMapping(c, def.name);
+		// If we arrive here, an overflow occurred in id.
+		// That means no ID was found
+		return CONTENT_IGNORE;
 	}
+	// IWritableNodeDefManager
 	virtual content_t set(const std::string &name,
 			const ContentFeatures &def)
 	{
+		assert(name != "");
 		assert(name == def.name);
-		u16 id = CONTENT_IGNORE;
+
+		// Don't allow redefining ignore (but allow air and unknown)
+		if(name == "ignore"){
+			infostream<<"NodeDefManager: WARNING: Ignoring "
+					<<"CONTENT_IGNORE redefinition"<<std::endl;
+			return CONTENT_IGNORE;
+		}
+
+		content_t id = CONTENT_IGNORE;
 		bool found = m_name_id_mapping.getId(name, id);  // ignore aliases
 		if(!found){
-			// Get some id
-			id = getFreeId();
-			if(id == CONTENT_IGNORE)
+			// Get new id
+			id = allocateId();
+			if(id == CONTENT_IGNORE){
+				infostream<<"NodeDefManager: WARNING: Absolute "
+						<<"limit reached"<<std::endl;
 				return CONTENT_IGNORE;
-			if(name != "")
-				addNameIdMapping(id, name);
+			}
+			assert(id != CONTENT_IGNORE);
+			addNameIdMapping(id, name);
+		}
+		m_content_features[id] = def;
+		verbosestream<<"NodeDefManager: registering content id \""<<id
+				<<"\": name=\""<<def.name<<"\""<<std::endl;
+
+		// Add this content to the list of all groups it belongs to
+		// FIXME: This should remove a node from groups it no longer
+		// belongs to when a node is re-registered
+		for (ItemGroupList::const_iterator i = def.groups.begin();
+			i != def.groups.end(); ++i) {
+			std::string group_name = i->first;
+			
+			std::map<std::string, GroupItems>::iterator
+				j = m_group_to_items.find(group_name);
+			if (j == m_group_to_items.end()) {
+				m_group_to_items[group_name].push_back(
+						std::make_pair(id, i->second));
+			} else {
+				GroupItems &items = j->second;
+				items.push_back(std::make_pair(id, i->second));
+			}
 		}
-		set(id, def);
 		return id;
 	}
 	virtual content_t allocateDummy(const std::string &name)
@@ -526,20 +602,21 @@ class CNodeDefManager: public IWritableNodeDefManager
 		bool new_style_water = g_settings->getBool("new_style_water");
 		bool new_style_leaves = g_settings->getBool("new_style_leaves");
 		bool opaque_water = g_settings->getBool("opaque_water");
-		
-		for(u16 i=0; i<=MAX_CONTENT; i++)
+
+		for(u32 i=0; i<m_content_features.size(); i++)
 		{
 			ContentFeatures *f = &m_content_features[i];
-			
+
 			// Figure out the actual tiles to use
 			TileDef tiledef[6];
 			for(u32 j=0; j<6; j++)
 			{
 				tiledef[j] = f->tiledef[j];
 				if(tiledef[j].name == "")
-					tiledef[j].name = "unknown_block.png";
+					tiledef[j].name = "unknown_node.png";
 			}
 
+			bool is_liquid = false;
 			switch(f->drawtype){
 			default:
 			case NDT_NORMAL:
@@ -556,21 +633,25 @@ class CNodeDefManager: public IWritableNodeDefManager
 					f->solidness = 0;
 				} else {
 					f->solidness = 1;
-					if(f->alpha == 255)
-						f->solidness = 2;
 					f->backface_culling = false;
 				}
+				is_liquid = true;
 				break;
 			case NDT_FLOWINGLIQUID:
 				assert(f->liquid_type == LIQUID_FLOWING);
 				f->solidness = 0;
 				if(opaque_water)
 					f->alpha = 255;
+				is_liquid = true;
 				break;
 			case NDT_GLASSLIKE:
 				f->solidness = 0;
 				f->visual_solidness = 1;
 				break;
+			case NDT_GLASSLIKE_FRAMED:
+				f->solidness = 0;
+				f->visual_solidness = 1;
+				break;
 			case NDT_ALLFACES:
 				f->solidness = 0;
 				f->visual_solidness = 1;
@@ -588,9 +669,12 @@ class CNodeDefManager: public IWritableNodeDefManager
 					}
 				}
 				break;
+			case NDT_PLANTLIKE:
+				f->solidness = 0;
+				f->backface_culling = false;
+				break;
 			case NDT_TORCHLIKE:
 			case NDT_SIGNLIKE:
-			case NDT_PLANTLIKE:
 			case NDT_FENCELIKE:
 			case NDT_RAILLIKE:
 			case NDT_NODEBOX:
@@ -598,16 +682,22 @@ class CNodeDefManager: public IWritableNodeDefManager
 				break;
 			}
 
+			u8 material_type;
+			if (is_liquid)
+				material_type = (f->alpha == 255) ? TILE_MATERIAL_LIQUID_OPAQUE : TILE_MATERIAL_LIQUID_TRANSPARENT;
+			else
+				material_type = (f->alpha == 255) ? TILE_MATERIAL_BASIC : TILE_MATERIAL_ALPHA;
+
 			// Tiles (fill in f->tiles[])
 			for(u16 j=0; j<6; j++){
 				// Texture
-				f->tiles[j].texture = tsrc->getTexture(tiledef[j].name);
+				f->tiles[j].texture = tsrc->getTexture(
+						tiledef[j].name,
+						&f->tiles[j].texture_id);
 				// Alpha
 				f->tiles[j].alpha = f->alpha;
-				if(f->alpha == 255)
-					f->tiles[j].material_type = MATERIAL_ALPHA_SIMPLE;
-				else
-					f->tiles[j].material_type = MATERIAL_ALPHA_VERTEX;
+				// Material type
+				f->tiles[j].material_type = material_type;
 				// Material flags
 				f->tiles[j].material_flags = 0;
 				if(f->backface_culling)
@@ -618,10 +708,9 @@ class CNodeDefManager: public IWritableNodeDefManager
 				if(f->tiles[j].material_flags &
 						MATERIAL_FLAG_ANIMATION_VERTICAL_FRAMES)
 				{
-					// Get raw texture size to determine frame count by
+					// Get texture size to determine frame count by
 					// aspect ratio
-					video::ITexture *t = tsrc->getTextureRaw(tiledef[j].name);
-					v2u32 size = t->getOriginalSize();
+					v2u32 size = f->tiles[j].texture->getOriginalSize();
 					int frame_height = (float)size.X /
 							(float)tiledef[j].animation.aspect_w *
 							(float)tiledef[j].animation.aspect_h;
@@ -644,14 +733,13 @@ class CNodeDefManager: public IWritableNodeDefManager
 			// Special tiles (fill in f->special_tiles[])
 			for(u16 j=0; j<CF_SPECIAL_COUNT; j++){
 				// Texture
-				f->special_tiles[j].texture =
-						tsrc->getTexture(f->tiledef_special[j].name);
+				f->special_tiles[j].texture = tsrc->getTexture(
+						f->tiledef_special[j].name,
+						&f->special_tiles[j].texture_id);
 				// Alpha
 				f->special_tiles[j].alpha = f->alpha;
-				if(f->alpha == 255)
-					f->special_tiles[j].material_type = MATERIAL_ALPHA_SIMPLE;
-				else
-					f->special_tiles[j].material_type = MATERIAL_ALPHA_VERTEX;
+				// Material type
+				f->special_tiles[j].material_type = material_type;
 				// Material flags
 				f->special_tiles[j].material_flags = 0;
 				if(f->tiledef_special[j].backface_culling)
@@ -662,10 +750,9 @@ class CNodeDefManager: public IWritableNodeDefManager
 				if(f->special_tiles[j].material_flags &
 						MATERIAL_FLAG_ANIMATION_VERTICAL_FRAMES)
 				{
-					// Get raw texture size to determine frame count by
+					// Get texture size to determine frame count by
 					// aspect ratio
-					video::ITexture *t = tsrc->getTextureRaw(f->tiledef_special[j].name);
-					v2u32 size = t->getOriginalSize();
+					v2u32 size = f->special_tiles[j].texture->getOriginalSize();
 					int frame_height = (float)size.X /
 							(float)f->tiledef_special[j].animation.aspect_w *
 							(float)f->tiledef_special[j].animation.aspect_h;
@@ -688,14 +775,15 @@ class CNodeDefManager: public IWritableNodeDefManager
 		}
 #endif
 	}
-	void serialize(std::ostream &os)
+	void serialize(std::ostream &os, u16 protocol_version)
 	{
 		writeU8(os, 1); // version
 		u16 count = 0;
 		std::ostringstream os2(std::ios::binary);
-		for(u16 i=0; i<=MAX_CONTENT; i++)
+		for(u32 i=0; i<m_content_features.size(); i++)
 		{
-			if(i == CONTENT_IGNORE || i == CONTENT_AIR)
+			if(i == CONTENT_IGNORE || i == CONTENT_AIR
+					|| i == CONTENT_UNKNOWN)
 				continue;
 			ContentFeatures *f = &m_content_features[i];
 			if(f->name == "")
@@ -704,8 +792,10 @@ class CNodeDefManager: public IWritableNodeDefManager
 			// Wrap it in a string to allow different lengths without
 			// strict version incompatibilities
 			std::ostringstream wrapper_os(std::ios::binary);
-			f->serialize(wrapper_os);
+			f->serialize(wrapper_os, protocol_version);
 			os2<<serializeString(wrapper_os.str());
+
+			assert(count + 1 > count); // must not overflow
 			count++;
 		}
 		writeU16(os, count);
@@ -719,24 +809,43 @@ class CNodeDefManager: public IWritableNodeDefManager
 			throw SerializationError("unsupported NodeDefinitionManager version");
 		u16 count = readU16(is);
 		std::istringstream is2(deSerializeLongString(is), std::ios::binary);
+		ContentFeatures f;
 		for(u16 n=0; n<count; n++){
 			u16 i = readU16(is2);
-			if(i > MAX_CONTENT){
-				errorstream<<"ContentFeatures::deSerialize(): "
-						<<"Too large content id: "<<i<<std::endl;
-				continue;
-			}
-			/*// Do not deserialize special types
-			if(i == CONTENT_IGNORE || i == CONTENT_AIR)
-				continue;*/
-			ContentFeatures *f = &m_content_features[i];
+
 			// Read it from the string wrapper
 			std::string wrapper = deSerializeString(is2);
 			std::istringstream wrapper_is(wrapper, std::ios::binary);
-			f->deSerialize(wrapper_is);
-			verbosestream<<"deserialized "<<f->name<<std::endl;
-			if(f->name != "")
-				addNameIdMapping(i, f->name);
+			f.deSerialize(wrapper_is);
+
+			// Check error conditions
+			if(i == CONTENT_IGNORE || i == CONTENT_AIR
+					|| i == CONTENT_UNKNOWN){
+				infostream<<"NodeDefManager::deSerialize(): WARNING: "
+					<<"not changing builtin node "<<i
+					<<std::endl;
+				continue;
+			}
+			if(f.name == ""){
+				infostream<<"NodeDefManager::deSerialize(): WARNING: "
+					<<"received empty name"<<std::endl;
+				continue;
+			}
+			u16 existing_id;
+			bool found = m_name_id_mapping.getId(f.name, existing_id);  // ignore aliases
+			if(found && i != existing_id){
+				infostream<<"NodeDefManager::deSerialize(): WARNING: "
+					<<"already defined with different ID: "
+					<<f.name<<std::endl;
+				continue;
+			}
+
+			// All is ok, add node definition with the requested ID
+			if(i >= m_content_features.size())
+				m_content_features.resize((u32)(i) + 1);
+			m_content_features[i] = f;
+			addNameIdMapping(i, f.name);
+			verbosestream<<"deserialized "<<f.name<<std::endl;
 		}
 	}
 private:
@@ -747,13 +856,19 @@ class CNodeDefManager: public IWritableNodeDefManager
 	}
 private:
 	// Features indexed by id
-	ContentFeatures m_content_features[MAX_CONTENT+1];
+	std::vector<ContentFeatures> m_content_features;
 	// A mapping for fast converting back and forth between names and ids
 	NameIdMapping m_name_id_mapping;
 	// Like m_name_id_mapping, but only from names to ids, and includes
 	// item aliases too. Updated by updateAliases()
 	// Note: Not serialized.
 	std::map<std::string, content_t> m_name_id_mapping_with_aliases;
+	// A mapping from groups to a list of content_ts (and their levels)
+	// that belong to it.  Necessary for a direct lookup in getIds().
+	// Note: Not serialized.
+	std::map<std::string, GroupItems> m_group_to_items;
+	// Next possibly free id
+	content_t m_next_id;
 };
 
 IWritableNodeDefManager* createNodeDefManager()
@@ -761,3 +876,122 @@ IWritableNodeDefManager* createNodeDefManager()
 	return new CNodeDefManager();
 }
 
+/*
+	Serialization of old ContentFeatures formats
+*/
+
+void ContentFeatures::serializeOld(std::ostream &os, u16 protocol_version)
+{
+	if(protocol_version == 13)
+	{
+		writeU8(os, 5); // version
+		os<<serializeString(name);
+		writeU16(os, groups.size());
+		for(ItemGroupList::const_iterator
+				i = groups.begin(); i != groups.end(); i++){
+			os<<serializeString(i->first);
+			writeS16(os, i->second);
+		}
+		writeU8(os, drawtype);
+		writeF1000(os, visual_scale);
+		writeU8(os, 6);
+		for(u32 i=0; i<6; i++)
+			tiledef[i].serialize(os, protocol_version);
+		writeU8(os, CF_SPECIAL_COUNT);
+		for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
+			tiledef_special[i].serialize(os, protocol_version);
+		}
+		writeU8(os, alpha);
+		writeU8(os, post_effect_color.getAlpha());
+		writeU8(os, post_effect_color.getRed());
+		writeU8(os, post_effect_color.getGreen());
+		writeU8(os, post_effect_color.getBlue());
+		writeU8(os, param_type);
+		writeU8(os, param_type_2);
+		writeU8(os, is_ground_content);
+		writeU8(os, light_propagates);
+		writeU8(os, sunlight_propagates);
+		writeU8(os, walkable);
+		writeU8(os, pointable);
+		writeU8(os, diggable);
+		writeU8(os, climbable);
+		writeU8(os, buildable_to);
+		os<<serializeString(""); // legacy: used to be metadata_name
+		writeU8(os, liquid_type);
+		os<<serializeString(liquid_alternative_flowing);
+		os<<serializeString(liquid_alternative_source);
+		writeU8(os, liquid_viscosity);
+		writeU8(os, light_source);
+		writeU32(os, damage_per_second);
+		node_box.serialize(os, protocol_version);
+		selection_box.serialize(os, protocol_version);
+		writeU8(os, legacy_facedir_simple);
+		writeU8(os, legacy_wallmounted);
+		serializeSimpleSoundSpec(sound_footstep, os);
+		serializeSimpleSoundSpec(sound_dig, os);
+		serializeSimpleSoundSpec(sound_dug, os);
+	}
+	else
+	{
+		throw SerializationError("ContentFeatures::serialize(): Unsupported version requested");
+	}
+}
+
+void ContentFeatures::deSerializeOld(std::istream &is, int version)
+{
+	if(version == 5) // In PROTOCOL_VERSION 13
+	{
+		name = deSerializeString(is);
+		groups.clear();
+		u32 groups_size = readU16(is);
+		for(u32 i=0; i<groups_size; i++){
+			std::string name = deSerializeString(is);
+			int value = readS16(is);
+			groups[name] = value;
+		}
+		drawtype = (enum NodeDrawType)readU8(is);
+		visual_scale = readF1000(is);
+		if(readU8(is) != 6)
+			throw SerializationError("unsupported tile count");
+		for(u32 i=0; i<6; i++)
+			tiledef[i].deSerialize(is);
+		if(readU8(is) != CF_SPECIAL_COUNT)
+			throw SerializationError("unsupported CF_SPECIAL_COUNT");
+		for(u32 i=0; i<CF_SPECIAL_COUNT; i++)
+			tiledef_special[i].deSerialize(is);
+		alpha = readU8(is);
+		post_effect_color.setAlpha(readU8(is));
+		post_effect_color.setRed(readU8(is));
+		post_effect_color.setGreen(readU8(is));
+		post_effect_color.setBlue(readU8(is));
+		param_type = (enum ContentParamType)readU8(is);
+		param_type_2 = (enum ContentParamType2)readU8(is);
+		is_ground_content = readU8(is);
+		light_propagates = readU8(is);
+		sunlight_propagates = readU8(is);
+		walkable = readU8(is);
+		pointable = readU8(is);
+		diggable = readU8(is);
+		climbable = readU8(is);
+		buildable_to = readU8(is);
+		deSerializeString(is); // legacy: used to be metadata_name
+		liquid_type = (enum LiquidType)readU8(is);
+		liquid_alternative_flowing = deSerializeString(is);
+		liquid_alternative_source = deSerializeString(is);
+		liquid_viscosity = readU8(is);
+		light_source = readU8(is);
+		damage_per_second = readU32(is);
+		node_box.deSerialize(is);
+		selection_box.deSerialize(is);
+		legacy_facedir_simple = readU8(is);
+		legacy_wallmounted = readU8(is);
+		deSerializeSimpleSoundSpec(sound_footstep, is);
+		deSerializeSimpleSoundSpec(sound_dig, is);
+		deSerializeSimpleSoundSpec(sound_dug, is);
+	}
+	else
+	{
+		throw SerializationError("unsupported ContentFeatures version");
+	}
+}
+