From 6a76c226e10e92c3e3339096f07f8ab065e2098b Mon Sep 17 00:00:00 2001
From: Kahrl <kahrl@gmx.net>
Date: Thu, 12 Jan 2012 06:10:39 +0100
Subject: The huge item definition and item namespace unification patch
 (itemdef), see http://c55.me/minetest/wiki/doku.php?id=changes:itemdef

---
 src/itemdef.cpp | 502 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 502 insertions(+)
 create mode 100644 src/itemdef.cpp

(limited to 'src/itemdef.cpp')

diff --git a/src/itemdef.cpp b/src/itemdef.cpp
new file mode 100644
index 000000000..aa888bbdf
--- /dev/null
+++ b/src/itemdef.cpp
@@ -0,0 +1,502 @@
+/*
+Minetest-c55
+Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2011 Kahrl <kahrl@gmx.net>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "itemdef.h"
+
+#include "gamedef.h"
+#include "nodedef.h"
+#include "materials.h"
+#include "inventory.h"
+#ifndef SERVER
+#include "mapblock_mesh.h"
+#include "mesh.h"
+#include "tile.h"
+#endif
+#include "log.h"
+#include "utility.h"
+#include <map>
+#include <set>
+
+/*
+	ItemDefinition
+*/
+ItemDefinition::ItemDefinition()
+{
+	resetInitial();
+}
+
+ItemDefinition::ItemDefinition(const ItemDefinition &def)
+{
+	resetInitial();
+	*this = def;
+}
+
+ItemDefinition& ItemDefinition::operator=(const ItemDefinition &def)
+{
+	if(this == &def)
+		return *this;
+
+	reset();
+
+	type = def.type;
+	name = def.name;
+	description = def.description;
+	inventory_image = def.inventory_image;
+	wield_image = def.wield_image;
+	wield_scale = def.wield_scale;
+	stack_max = def.stack_max;
+	usable = def.usable;
+	liquids_pointable = def.liquids_pointable;
+	if(def.tool_digging_properties)
+	{
+		tool_digging_properties = new ToolDiggingProperties(
+				*def.tool_digging_properties);
+	}
+#ifndef SERVER
+	inventory_texture = def.inventory_texture;
+	if(def.wield_mesh)
+	{
+		wield_mesh = def.wield_mesh;
+		wield_mesh->grab();
+	}
+#endif
+	return *this;
+}
+
+ItemDefinition::~ItemDefinition()
+{
+	reset();
+}
+
+void ItemDefinition::resetInitial()
+{
+	// Initialize pointers to NULL so reset() does not delete undefined pointers
+	tool_digging_properties = NULL;
+#ifndef SERVER
+	inventory_texture = NULL;
+	wield_mesh = NULL;
+#endif
+	reset();
+}
+
+void ItemDefinition::reset()
+{
+	type = ITEM_NONE;
+	name = "";
+	description = "";
+	inventory_image = "";
+	wield_image = "";
+	wield_scale = v3f(1.0, 1.0, 1.0);
+	stack_max = 99;
+	usable = false;
+	liquids_pointable = false;
+	if(tool_digging_properties)
+	{
+		delete tool_digging_properties;
+		tool_digging_properties = NULL;
+	}
+
+#ifndef SERVER
+	inventory_texture = NULL;
+	if(wield_mesh)
+	{
+		wield_mesh->drop();
+		wield_mesh = NULL;
+	}
+#endif
+}
+
+void ItemDefinition::serialize(std::ostream &os) const
+{
+	writeU8(os, 0); // version
+	writeU8(os, type);
+	os<<serializeString(name);
+	os<<serializeString(description);
+	os<<serializeString(inventory_image);
+	os<<serializeString(wield_image);
+	writeV3F1000(os, wield_scale);
+	writeS16(os, stack_max);
+	writeU8(os, usable);
+	writeU8(os, liquids_pointable);
+	std::string tool_digging_properties_s = "";
+	if(tool_digging_properties)
+	{
+		std::ostringstream tmp_os(std::ios::binary);
+		tool_digging_properties->serialize(tmp_os);
+		tool_digging_properties_s = tmp_os.str();
+	}
+	os<<serializeString(tool_digging_properties_s);
+}
+
+void ItemDefinition::deSerialize(std::istream &is)
+{
+	// Reset everything
+	reset();
+
+	// Deserialize
+	int version = readU8(is);
+	if(version != 0)
+		throw SerializationError("unsupported ItemDefinition version");
+	type = (enum ItemType)readU8(is);
+	name = deSerializeString(is);
+	description = deSerializeString(is);
+	inventory_image = deSerializeString(is);
+	wield_image = deSerializeString(is);
+	wield_scale = readV3F1000(is);
+	stack_max = readS16(is);
+	usable = readU8(is);
+	liquids_pointable = readU8(is);
+	std::string tool_digging_properties_s = deSerializeString(is);
+	if(!tool_digging_properties_s.empty())
+	{
+		std::istringstream tmp_is(tool_digging_properties_s, std::ios::binary);
+		tool_digging_properties = new ToolDiggingProperties;
+		tool_digging_properties->deSerialize(tmp_is);
+	}
+}
+
+/*
+	CItemDefManager
+*/
+
+// SUGG: Support chains of aliases?
+
+class CItemDefManager: public IWritableItemDefManager
+{
+public:
+	CItemDefManager()
+	{
+		clear();
+	}
+	virtual ~CItemDefManager()
+	{
+	}
+	virtual const ItemDefinition& get(const std::string &name_) const
+	{
+		// Convert name according to possible alias
+		std::string name = getAlias(name_);
+		// Get the definition
+		std::map<std::string, ItemDefinition*>::const_iterator i;
+		i = m_item_definitions.find(name);
+		if(i == m_item_definitions.end())
+			i = m_item_definitions.find("unknown");
+		assert(i != m_item_definitions.end());
+		return *(i->second);
+	}
+	virtual std::string getAlias(const std::string &name) const
+	{
+		std::map<std::string, std::string>::const_iterator i;
+		i = m_aliases.find(name);
+		if(i != m_aliases.end())
+			return i->second;
+		return name;
+	}
+	virtual std::set<std::string> getAll() const
+	{
+		std::set<std::string> result;
+		for(std::map<std::string, ItemDefinition*>::const_iterator
+				i = m_item_definitions.begin();
+				i != m_item_definitions.end(); i++)
+		{
+			result.insert(i->first);
+		}
+		for(std::map<std::string, std::string>::const_iterator
+				i = m_aliases.begin();
+				i != m_aliases.end(); i++)
+		{
+			result.insert(i->first);
+		}
+		return result;
+	}
+	virtual bool isKnown(const std::string &name_) const
+	{
+		// Convert name according to possible alias
+		std::string name = getAlias(name_);
+		// Get the definition
+		std::map<std::string, ItemDefinition*>::const_iterator i;
+		return m_item_definitions.find(name) != m_item_definitions.end();
+	}
+	void clear()
+	{
+		for(std::map<std::string, ItemDefinition*>::const_iterator
+				i = m_item_definitions.begin();
+				i != m_item_definitions.end(); i++)
+		{
+			delete i->second;
+		}
+		m_item_definitions.clear();
+		m_aliases.clear();
+
+		// Add the four builtin items:
+		//   "" is the hand
+		//   "unknown" is returned whenever an undefined item is accessed
+		//   "air" is the air node
+		//   "ignore" is the ignore node
+
+		ItemDefinition* hand_def = new ItemDefinition;
+		hand_def->name = "";
+		hand_def->wield_image = "wieldhand.png";
+		hand_def->tool_digging_properties = new ToolDiggingProperties;
+		m_item_definitions.insert(std::make_pair("", hand_def));
+
+		ItemDefinition* unknown_def = new ItemDefinition;
+		unknown_def->name = "unknown";
+		m_item_definitions.insert(std::make_pair("unknown", unknown_def));
+
+		ItemDefinition* air_def = new ItemDefinition;
+		air_def->type = ITEM_NODE;
+		air_def->name = "air";
+		m_item_definitions.insert(std::make_pair("air", air_def));
+
+		ItemDefinition* ignore_def = new ItemDefinition;
+		ignore_def->type = ITEM_NODE;
+		ignore_def->name = "ignore";
+		m_item_definitions.insert(std::make_pair("ignore", ignore_def));
+	}
+	virtual void registerItem(const ItemDefinition &def)
+	{
+		infostream<<"ItemDefManager: registering \""<<def.name<<"\""<<std::endl;
+		// Ensure that the "" item (the hand) always has ToolDiggingProperties
+		if(def.name == "")
+			assert(def.tool_digging_properties != NULL);
+
+		m_item_definitions[def.name] = new ItemDefinition(def);
+
+		// Remove conflicting alias if it exists
+		bool alias_removed = (m_aliases.erase(def.name) != 0);
+		if(alias_removed)
+			infostream<<"ItemDefManager: erased alias "<<def.name
+					<<" because item was defined"<<std::endl;
+	}
+	virtual void registerAlias(const std::string &name,
+			const std::string &convert_to)
+	{
+		if(m_item_definitions.find(name) == m_item_definitions.end())
+		{
+			infostream<<"ItemDefManager: setting alias "<<name
+				<<" -> "<<convert_to<<std::endl;
+			m_aliases[name] = convert_to;
+		}
+	}
+
+	virtual void updateTexturesAndMeshes(IGameDef *gamedef)
+	{
+#ifndef SERVER
+		infostream<<"ItemDefManager::updateTexturesAndMeshes(): Updating "
+				<<"textures and meshes in item definitions"<<std::endl;
+
+		ITextureSource *tsrc = gamedef->getTextureSource();
+		INodeDefManager *nodedef = gamedef->getNodeDefManager();
+		IrrlichtDevice *device = tsrc->getDevice();
+		video::IVideoDriver *driver = device->getVideoDriver();
+
+		for(std::map<std::string, ItemDefinition*>::iterator
+				i = m_item_definitions.begin();
+				i != m_item_definitions.end(); i++)
+		{
+			ItemDefinition *def = i->second;
+
+			bool need_node_mesh = false;
+
+			// Create an inventory texture
+			def->inventory_texture = NULL;
+			if(def->inventory_image != "")
+			{
+				def->inventory_texture = tsrc->getTextureRaw(def->inventory_image);
+			}
+			else if(def->type == ITEM_NODE)
+			{
+				need_node_mesh = true;
+			}
+
+			// Create a wield mesh
+			if(def->wield_mesh != NULL)
+			{
+				def->wield_mesh->drop();
+				def->wield_mesh = NULL;
+			}
+			if(def->type == ITEM_NODE && def->wield_image == "")
+			{
+				need_node_mesh = true;
+			}
+			else if(def->wield_image != "" || def->inventory_image != "")
+			{
+				// Extrude the wield image into a mesh
+
+				std::string imagename;
+				if(def->wield_image != "")
+					imagename = def->wield_image;
+				else
+					imagename = def->inventory_image;
+
+				def->wield_mesh = createExtrudedMesh(
+						tsrc->getTextureRaw(imagename),
+						driver,
+						def->wield_scale * v3f(40.0, 40.0, 4.0));
+				if(def->wield_mesh == NULL)
+				{
+					infostream<<"ItemDefManager: WARNING: "
+						<<"updateTexturesAndMeshes(): "
+						<<"Unable to create extruded mesh for item "
+						<<def->name<<std::endl;
+				}
+			}
+
+			if(need_node_mesh)
+			{
+				/*
+					Get node properties
+				*/
+				content_t id = nodedef->getId(def->name);
+				const ContentFeatures &f = nodedef->get(id);
+
+				/*
+				 	Make a mesh from the node
+				*/
+				MeshMakeData mesh_make_data;
+				MapNode mesh_make_node(
+					id,
+					(f.param_type == CPT_LIGHT) ? 0xee : 0,
+					0);
+				mesh_make_data.fillSingleNode(1000, &mesh_make_node);
+				scene::IMesh *node_mesh =
+					makeMapBlockMesh(&mesh_make_data, gamedef);
+				setMeshColor(node_mesh, video::SColor(255, 255, 255, 255));
+
+				/*
+					Scale and translate the mesh so it's a unit cube
+					centered on the origin
+				*/
+				scaleMesh(node_mesh, v3f(1.0/BS, 1.0/BS, 1.0/BS));
+				translateMesh(node_mesh, v3f(-1.0, -1.0, -1.0));
+
+				/*
+					Draw node mesh into a render target texture
+				*/
+				if(def->inventory_texture == NULL && node_mesh != NULL)
+				{
+					core::dimension2d<u32> dim(64,64);
+					std::string rtt_texture_name = "INVENTORY_"
+						+ def->name + "_RTT";
+					v3f camera_position(0, 1.0, -1.5);
+					camera_position.rotateXZBy(45);
+					v3f camera_lookat(0, 0, 0);
+					core::CMatrix4<f32> camera_projection_matrix;
+					// Set orthogonal projection
+					camera_projection_matrix.buildProjectionMatrixOrthoLH(
+							1.65, 1.65, 0, 100);
+
+					video::SColorf ambient_light(0.2,0.2,0.2);
+					v3f light_position(10, 100, -50);
+					video::SColorf light_color(0.5,0.5,0.5);
+					f32 light_radius = 1000;
+
+					def->inventory_texture = generateTextureFromMesh(
+						node_mesh, device, dim, rtt_texture_name,
+						camera_position,
+						camera_lookat,
+						camera_projection_matrix,
+						ambient_light,
+						light_position,
+						light_color,
+						light_radius);
+					// Note: might have returned NULL
+				}
+
+				/*
+					Use the node mesh as the wield mesh
+				*/
+				if(def->wield_mesh == NULL && node_mesh != NULL)
+				{
+					// Scale to proper wield mesh proportions
+					scaleMesh(node_mesh, v3f(30.0, 30.0, 30.0)
+							* def->wield_scale);
+					def->wield_mesh = node_mesh;
+					def->wield_mesh->grab();
+				}
+
+
+				if(node_mesh != NULL)
+					node_mesh->drop();
+			}
+		}
+#endif
+	}
+	void serialize(std::ostream &os)
+	{
+		writeU8(os, 0); // version
+		u16 count = m_item_definitions.size();
+		writeU16(os, count);
+		for(std::map<std::string, ItemDefinition*>::const_iterator
+				i = m_item_definitions.begin();
+				i != m_item_definitions.end(); i++)
+		{
+			ItemDefinition *def = i->second;
+			// Serialize ItemDefinition and write wrapped in a string
+			std::ostringstream tmp_os(std::ios::binary);
+			def->serialize(tmp_os);
+			os<<serializeString(tmp_os.str());
+		}
+		writeU16(os, m_aliases.size());
+		for(std::map<std::string, std::string>::const_iterator
+			i = m_aliases.begin(); i != m_aliases.end(); i++)
+		{
+			os<<serializeString(i->first);
+			os<<serializeString(i->second);
+		}
+	}
+	void deSerialize(std::istream &is)
+	{
+		// Clear everything
+		clear();
+		// Deserialize
+		int version = readU8(is);
+		if(version != 0)
+			throw SerializationError("unsupported ItemDefManager version");
+		u16 count = readU16(is);
+		for(u16 i=0; i<count; i++)
+		{
+			// Deserialize a string and grab an ItemDefinition from it
+			std::istringstream tmp_is(deSerializeString(is), std::ios::binary);
+			ItemDefinition def;
+			def.deSerialize(tmp_is);
+			// Register
+			registerItem(def);
+		}
+		u16 num_aliases = readU16(is);
+		for(u16 i=0; i<num_aliases; i++)
+		{
+			std::string name = deSerializeString(is);
+			std::string convert_to = deSerializeString(is);
+			registerAlias(name, convert_to);
+		}
+	}
+private:
+	// Key is name
+	std::map<std::string, ItemDefinition*> m_item_definitions;
+	// Aliases
+	std::map<std::string, std::string> m_aliases;
+};
+
+IWritableItemDefManager* createItemDefManager()
+{
+	return new CItemDefManager();
+}
+
-- 
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