Working on entity Lua API.

docs/lua-api-core.md

@@ -18,11 +18,11 @@ Adds a listener to a specific type of event.
 
 Example:
 ```lua
-openminer:add_listener(EventType.OnBlockPlaced, function(pos, player, world, client, server)
+openminer:add_listener(EventType.OnBlockPlaced, function(pos, block, player, world, client, server)
 	server:send_chat_message(0, "Block placed at " .. pos.x .. ";" .. pos.y .. ";" .. pos.z .. " by Client" .. player:client_id(), client);
 end)
 
-openminer:add_listener(EventType.OnBlockDigged, function(pos, player, world, client, server)
+openminer:add_listener(EventType.OnBlockDigged, function(pos, block, player, world, client, server)
 	server:send_chat_message(0, "Block digged at " .. pos.x .. ";" .. pos.y .. ";" .. pos.z .. " by Client" .. player:client_id(), client);
 end)
 
@@ -35,7 +35,7 @@ end)
 
 Possible events:
 
-- `OnBlockPlaced`: `funcion(pos, player, world, client, server)`
+- `OnBlockPlaced`: `funcion(pos, block, player, world, client, server)`
-- `OnBlockDigged`: `funcion(pos, player, world, client, server)`
+- `OnBlockDigged`: `funcion(pos, block, player, world, client, server)`
 - `OnBlockActivated`: `function(pos, block, player, world, client, server)`
 

mods/default/init.lua

@@ -34,11 +34,11 @@ dofile("trees.lua")
 dofile("biomes.lua")
 dofile("dimensions.lua")
 
--- openminer:add_listener(EventType.OnBlockPlaced, function(pos, player, world, client, server)
+-- openminer:add_listener(EventType.OnBlockPlaced, function(pos, block, player, world, client, server)
 -- 	server:send_chat_message(0, "Block placed at " .. pos.x .. ";" .. pos.y .. ";" .. pos.z .. " by Client" .. player:client_id(), client);
 -- end)
 
--- openminer:add_listener(EventType.OnBlockDigged, function(pos, player, world, client, server)
+-- openminer:add_listener(EventType.OnBlockDigged, function(pos, block, player, world, client, server)
 -- 	server:send_chat_message(0, "Block digged at " .. pos.x .. ";" .. pos.y .. ";" .. pos.z .. " by Client" .. player:client_id(), client);
 -- end)
 
@@ -141,3 +141,49 @@ function show_inventory(client, screen_width, screen_height, gui_scale)
 	gui:show(client)
 end
 
+mod:entity {
+	id = "item_drop",
+
+	properties = {
+		visual = {
+			type = "inventorycube",
+			size = 0.25,
+			origin = {0.125, 0.125, 0.125},
+		},
+
+		is_rotatable = true,
+
+		animation = {
+			{
+				type = "rotation",
+				axis = {0, 0, 1},
+				angle = 0.5
+			},
+			{
+				type = "translation",
+				delta = {0, 0, -0.0005},
+				min = -0.2,
+				max = 0,
+				loop = true
+			}
+		},
+
+		hitbox = {0, 0, 0, 0.25, 0.25, 0.25},
+	},
+
+	on_collision = function(entity, other)
+		if other:type() == "player" then
+			other:inventory():add_item(entity:properties():itemstack())
+		end
+	end,
+}
+
+openminer:add_listener(EventType.OnBlockDigged, function(pos, block, player, world, client, server)
+	mod:spawn_entity("item_drop", {
+		position = {pos.x, pos.y, pos.z},
+		dimension = world:dimension():id(),
+
+		itemstack = {block:string_id(), 1}
+	})
+end)
+

source/common/core/Registry.cpp

@@ -117,6 +117,19 @@ Dimension &Registry::registerSerializedDimension(sf::Packet &packet) {
 	return m_dimensions.back();
 }
 
+entt::entity Registry::registerEntity(const std::string &stringID) {
+	auto it = m_entities.find(stringID);
+	if (it == m_entities.end()) {
+		entt::entity entity = m_entityRegistry.create();
+		m_entities.emplace(stringID, entity);
+		return entity;
+	}
+	else
+		gkError() << "Redefinition of entity '" + stringID + "', keeping the first one";
+
+	return static_cast<entt::entity>(0);
+}
+
 const Block &Registry::getBlockFromStringID(const std::string &stringID) {
 	if (stringID.empty()) return getBlock(0);
 	auto it = m_blocksID.find(stringID);
@@ -166,6 +179,21 @@ const Biome &Registry::getBiomeFromStringID(const std::string &stringID) {
 	return getBiome(it->second);
 }
 
+entt::entity Registry::getEntityFromStringID(const std::string &stringID) {
+	if (stringID.empty()) {
+		gkError() << "Failed to get entity from empty string ID";
+		return (entt::entity)0;
+	}
+
+	auto it = m_entities.find(stringID);
+	if (it == m_entities.end()) {
+		gkError() << "Failed to get entity '" + stringID + "': Not found";
+		return (entt::entity)0;
+	}
+
+	return it->second;
+}
+
 const Recipe *Registry::getRecipe(const Inventory &inventory) const {
 	for (auto &recipe : m_recipes) {
 		if (recipe->isMatching(inventory))

source/common/core/Registry.hpp

@@ -31,6 +31,8 @@
 #include <unordered_map>
 #include <vector>
 
+#include <entt/entt.hpp>
+
 #include "Biome.hpp"
 #include "Block.hpp"
 #include "Dimension.hpp"
@@ -82,6 +84,9 @@ class Registry : public ISerializable {
 		Dimension &registerDimension(const std::string &stringID, const std::string &label);
 		Dimension &registerSerializedDimension(sf::Packet &packet);
 
+		entt::registry &entityRegistry() { return m_entityRegistry; }
+		entt::entity registerEntity(const std::string &stringID);
+
 		const Block &getBlock(u16 id) const { return *m_blocks.at(id).get(); }
 		const Item &getItem(u16 id) const { return m_items.at(id); }
 		const Sky &getSky(u16 id) const { return m_skies.at(id); }
@@ -94,6 +99,7 @@ class Registry : public ISerializable {
 		const Sky &getSkyFromStringID(const std::string &stringID);
 		const Tree &getTreeFromStringID(const std::string &stringID);
 		const Biome &getBiomeFromStringID(const std::string &stringID);
+		entt::entity getEntityFromStringID(const std::string &stringID);
 
 		const Recipe *getRecipe(const Inventory &inventory) const;
 
@@ -127,6 +133,10 @@ class Registry : public ISerializable {
 		std::unordered_map<std::string, u16> m_biomesID;
 		std::unordered_map<std::string, u16> m_dimensionsID;
 
+		std::unordered_map<std::string, entt::entity> m_entities;
+
+		entt::registry m_entityRegistry;
+
 		enum class DataType {
 			Block,
 			Item,

source/common/scene/component/DrawableDef.hpp

@@ -44,6 +44,7 @@ class DrawableDef : public ISerializable {
 		InventoryCubeDef &addInventoryCube();
 
 		// FIXME
+		InventoryCubeDef &getInventoryCubeDef() { return m_cubes.back(); }
 		const InventoryCubeDef &getInventoryCubeDef() const { return m_cubes.back(); }
 
 		void serialize(sf::Packet &packet) const override;

source/server/core/ServerApplication.hpp

@@ -65,9 +65,6 @@ class ServerApplication {
 		gk::GameClock m_clock;
 		gk::EventHandler *m_eventHandler = nullptr;
 
-		ScriptEngine m_scriptEngine;
-		ServerModLoader m_modLoader{m_scriptEngine};
-
 		Registry m_registry;
 
 		u16 m_port = 4242;
@@ -75,6 +72,9 @@ class ServerApplication {
 		WorldController m_worldController{m_registry, m_clock};
 		PlayerList m_players;
 
+		ScriptEngine m_scriptEngine;
+		ServerModLoader m_modLoader{m_scriptEngine, m_registry, m_worldController};
+
 		Server m_server;
 		ServerCommandHandler m_serverCommandHandler{m_scriptEngine, m_server, m_worldController, m_players, m_registry};
 };

source/server/lua/LuaMod.cpp

@@ -43,6 +43,7 @@ void LuaMod::commit() {
 			case DefinitionType::Tree:            m_biomeLoader.loadTree(it.second);             break;
 			case DefinitionType::Biome:           m_biomeLoader.loadBiome(it.second);            break;
 			case DefinitionType::Dimension:       m_dimensionLoader.loadDimension(it.second);    break;
+			case DefinitionType::Entity:          m_entityLoader.loadEntity(it.second);          break;
 			default: break;
 		}
 
@@ -62,7 +63,8 @@ void LuaMod::initUsertype(sol::state &lua) {
 		"sky",             &LuaMod::registerSky,
 		"tree",            &LuaMod::registerTree,
 		"biome",           &LuaMod::registerBiome,
-		"dimension",       &LuaMod::registerDimension
+		"dimension",       &LuaMod::registerDimension,
+		"entity",          &LuaMod::registerEntity
 	);
 }
 
@@ -98,3 +100,11 @@ void LuaMod::registerDimension(const sol::table &table) {
 	m_defs.emplace(DefinitionType::Dimension, table);
 }
 
+void LuaMod::registerEntity(const sol::table &table) {
+	m_defs.emplace(DefinitionType::Entity, table);
+}
+
+void LuaMod::spawnEntity(const std::string &entityID, const sol::table &table) {
+	m_entityLoader.spawnEntity(entityID, table);
+}
+

source/server/lua/LuaMod.hpp

@@ -32,17 +32,19 @@
 #include "LuaBiomeLoader.hpp"
 #include "LuaBlockLoader.hpp"
 #include "LuaDimensionLoader.hpp"
+#include "LuaEntityLoader.hpp"
 #include "LuaItemLoader.hpp"
 #include "LuaRecipeLoader.hpp"
 #include "LuaSkyLoader.hpp"
 
+class Registry;
+class WorldController;
+
 // This class is meant to be used ONLY in Lua
 class LuaMod {
 	public:
-		// FIXME: Check if this name has already been used
+		LuaMod(const std::string &id, Registry &registry, WorldController &worldController)
-		//        Check if this name matches [a-zA-Z0-9]+
+			: m_id(id), m_registry(registry), m_worldController(worldController) {}
-		//        Check if this name != "group"
-		LuaMod(const std::string &id) : m_id(id) {}
 
 		void commit();
 
@@ -61,6 +63,9 @@ class LuaMod {
 		void registerTree(const sol::table &table);
 		void registerBiome(const sol::table &table);
 		void registerDimension(const sol::table &table);
+		void registerEntity(const sol::table &table);
+
+		void spawnEntity(const std::string &entityID, const sol::table &table);
 
 		enum class DefinitionType {
 			Block,
@@ -71,18 +76,24 @@ class LuaMod {
 			Tree,
 			Biome,
 			Dimension,
+			Entity,
 		};
 
 		std::queue<std::pair<DefinitionType, sol::table>> m_defs;
 
 		std::string m_id;
 
+		// TODO: Add registry instance to loaders in order to avoid using singleton
+		Registry &m_registry;
+		WorldController &m_worldController;
+
 		LuaBlockLoader m_blockLoader{*this};
 		LuaItemLoader m_itemLoader{*this};
 		LuaRecipeLoader m_recipeLoader;
 		LuaSkyLoader m_skyLoader{*this};
 		LuaBiomeLoader m_biomeLoader{*this};
 		LuaDimensionLoader m_dimensionLoader{*this};
+		LuaEntityLoader m_entityLoader{*this, m_worldController};
 };
 
 #endif // LUAMOD_HPP_

source/server/lua/ServerModLoader.cpp

@@ -77,7 +77,7 @@ LuaMod &ServerModLoader::registerMod(const std::string &name) {
 	if (it != m_mods.end())
 		throw std::runtime_error("The mod '" + name + "' has already been loaded. Mod name must be unique.");
 
-	m_mods.emplace(name, name);
+	m_mods.emplace(name, LuaMod{name, m_registry, m_worldController});
 
 	return m_mods.at(name);
 }

source/server/lua/ServerModLoader.hpp

@@ -32,11 +32,14 @@
 
 #include "LuaMod.hpp"
 
+class Registry;
 class ScriptEngine;
+class WorldController;
 
 class ServerModLoader {
 	public:
-		ServerModLoader(ScriptEngine &scriptEngine) : m_scriptEngine(scriptEngine) {}
+		ServerModLoader(ScriptEngine &scriptEngine, Registry &registry, WorldController &worldController)
+			: m_scriptEngine(scriptEngine), m_registry(registry), m_worldController(worldController) {}
 
 		void loadMods();
 
@@ -44,6 +47,8 @@ class ServerModLoader {
 
 	private:
 		ScriptEngine &m_scriptEngine;
+		Registry &m_registry;
+		WorldController &m_worldController;
 
 		std::unordered_map<std::string, LuaMod> m_mods;
 };

source/server/lua/loader/LuaEntityLoader.cpp

@@ -0,0 +1,162 @@
+/*
+ * =====================================================================================
+ *
+ *  OpenMiner
+ *
+ *  Copyright (C) 2018-2020 Unarelith, Quentin Bazin <openminer@unarelith.net>
+ *  Copyright (C) 2019-2020 the OpenMiner contributors (see CONTRIBUTORS.md)
+ *
+ *  This file is part of OpenMiner.
+ *
+ *  OpenMiner is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  OpenMiner 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with OpenMiner; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * =====================================================================================
+ */
+#include <gk/core/Debug.hpp>
+
+#include "AnimationComponent.hpp"
+#include "DrawableDef.hpp"
+#include "LuaEntityLoader.hpp"
+#include "LuaMod.hpp"
+#include "NetworkComponent.hpp"
+#include "PositionComponent.hpp"
+#include "Registry.hpp"
+#include "RotationComponent.hpp"
+
+void LuaEntityLoader::loadEntity(const sol::table &table) const {
+	std::string stringID = m_mod.id() + ":" + table["id"].get<std::string>();
+
+	entt::registry &registry = Registry::getInstance().entityRegistry();
+	entt::entity entity = Registry::getInstance().registerEntity(stringID);
+
+	// TODO: Create a struct to store these functions
+	sol::unsafe_function onSpawn = table["on_spawn"];
+	sol::unsafe_function onCollision = table["on_collision"];
+
+	sol::optional<sol::table> properties = table["properties"];
+	if (properties != sol::nullopt) {
+		sol::optional<sol::table> visual = properties.value()["visual"];
+		if (visual != sol::nullopt) {
+			std::string type = visual.value()["type"];
+			if (type == "inventorycube") {
+				auto &drawable = registry.emplace<DrawableDef>(entity);
+				auto &cube = drawable.addInventoryCube();
+
+				cube.size = visual.value()["size"].get_or(1.0f);
+
+				sol::optional<sol::table> origin = visual.value()["origin"];
+				if (origin != sol::nullopt) {
+					cube.origin = {origin.value()[1], origin.value()[2], origin.value()[3]};
+				}
+			}
+			else
+				gkError() << "For entity '" + stringID + "': Visual type '" + type + "' unknown";
+		}
+
+		bool isRotatable = properties.value()["is_rotatable"].get_or(false);
+		if (isRotatable)
+			registry.emplace<RotationComponent>(entity);
+
+		sol::optional<sol::table> animation = properties.value()["animation"];
+		if (animation != sol::nullopt) {
+			auto &animationComponent = registry.emplace<AnimationComponent>(entity);
+			for (auto &it : animation.value()) {
+				sol::table anim = it.second.as<sol::table>();
+				std::string type = anim["type"];
+				if (type == "rotation") {
+					sol::table axis = anim["axis"];
+					animationComponent.addRotation(axis[1], axis[2], axis[3], anim["angle"]);
+				}
+				else if (type == "translation") {
+					sol::table delta = anim["delta"];
+					animationComponent.addTranslation(delta[1], delta[2], delta[3], anim["min"], anim["max"], anim["loop"].get_or(true));
+				}
+				else
+					gkError() << "For entity '" + stringID + "': Animation type '" + type + "' unknown";
+			}
+		}
+
+		sol::optional<sol::table> hitboxTable = properties.value()["hitbox"];
+		if (hitboxTable != sol::nullopt) {
+			registry.emplace<gk::FloatBox>(entity,
+				hitboxTable.value()[1], hitboxTable.value()[2], hitboxTable.value()[3],
+				hitboxTable.value()[4], hitboxTable.value()[5], hitboxTable.value()[6]
+			);
+		}
+	}
+}
+
+#include "WorldController.hpp"
+
+void LuaEntityLoader::spawnEntity(const std::string &entityID, const sol::table &table) const {
+	gk::Vector3f pos;
+	u16 dim;
+
+	sol::optional<sol::table> position = table["position"];
+	sol::optional<u16> dimension = table["dimension"];
+	if (position != sol::nullopt && dimension != sol::nullopt) {
+		pos = {position.value()[1], position.value()[2], position.value()[3]};
+		dim = dimension.value();
+	}
+	else {
+		gkError() << "In mod '" + m_mod.id() + "': Cannot spawn entity '" + entityID + "' without a position and a dimension";
+		return;
+	}
+
+	ItemStack stack;
+	sol::optional<sol::table> itemStack = table["itemstack"];
+	if (itemStack != sol::nullopt) {
+		stack.setItem(itemStack.value()[1]);
+		stack.setAmount(itemStack.value()[2].get_or(1));
+	}
+
+	// Create entity copy here
+	entt::registry &registry = Registry::getInstance().entityRegistry();
+	entt::entity entityModel = Registry::getInstance().getEntityFromStringID(entityID);
+	if (entityModel != (entt::entity)0) {
+		ServerWorld &world = m_worldController.getWorld(dim);
+		entt::registry &sceneRegistry = world.scene().registry();
+		entt::entity entity = sceneRegistry.create();
+
+		sceneRegistry.emplace<PositionComponent>(entity, pos.x, pos.y, pos.z, dim);
+		sceneRegistry.emplace<NetworkComponent>(entity, entity);
+
+		if (registry.has<RotationComponent>(entityModel))
+			sceneRegistry.emplace<RotationComponent>(entity);
+
+		auto *drawable = registry.try_get<DrawableDef>(entityModel);
+		if (drawable) {
+			auto &drawableDef = sceneRegistry.emplace<DrawableDef>(entity, *drawable);
+			if (stack.amount()) {
+				auto &cube = drawableDef.getInventoryCubeDef();
+				cube.blockID = stack.item().stringID();
+			}
+		}
+
+		auto *animation = registry.try_get<AnimationComponent>(entityModel);
+		if (animation)
+			sceneRegistry.emplace<AnimationComponent>(entity, *animation);
+
+		auto *hitbox = registry.try_get<gk::FloatBox>(entityModel);
+		if (hitbox)
+			sceneRegistry.emplace<gk::FloatBox>(entity, *hitbox);
+
+		if (stack.amount())
+			sceneRegistry.emplace<ItemStack>(entity, stack);
+	}
+	else
+		gkError() << "In mod '" + m_mod.id() + "': Cannot find entity with id '" + entityID + "'";
+}
+

source/server/lua/loader/LuaEntityLoader.hpp

@@ -0,0 +1,48 @@
+/*
+ * =====================================================================================
+ *
+ *  OpenMiner
+ *
+ *  Copyright (C) 2018-2020 Unarelith, Quentin Bazin <openminer@unarelith.net>
+ *  Copyright (C) 2019-2020 the OpenMiner contributors (see CONTRIBUTORS.md)
+ *
+ *  This file is part of OpenMiner.
+ *
+ *  OpenMiner is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  OpenMiner 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with OpenMiner; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * =====================================================================================
+ */
+#ifndef LUAENTITYLOADER_HPP_
+#define LUAENTITYLOADER_HPP_
+
+#include <sol.hpp>
+
+class LuaMod;
+class WorldController;
+
+class LuaEntityLoader {
+	public:
+		LuaEntityLoader(LuaMod &mod, WorldController &worldController)
+			: m_mod(mod), m_worldController(worldController) {}
+
+		void loadEntity(const sol::table &table) const;
+		void spawnEntity(const std::string &entityID, const sol::table &table) const;
+
+	private:
+		LuaMod &m_mod;
+		WorldController &m_worldController;
+};
+
+#endif // LUAENTITYLOADER_HPP_

source/server/network/ServerCommandHandler.cpp

@@ -264,8 +264,9 @@ void ServerCommandHandler::setupCallbacks() {
 			ServerWorld &world = getWorldForClient(client.id);
 			world.setData(x, y, z, block >> 16);
 			world.setBlock(x, y, z, block & 0xffff);
+			const Block &blockDef = Registry::getInstance().getBlock(block & 0xffff);
 
-			m_scriptEngine.luaCore().onEvent(LuaEventType::OnBlockPlaced, glm::ivec3{x, y, z}, *player, world, client, *this);
+			m_scriptEngine.luaCore().onEvent(LuaEventType::OnBlockPlaced, glm::ivec3{x, y, z}, blockDef, *player, world, client, *this);
 
 			Network::Packet answer;
 			answer << Network::Command::BlockUpdate << x << y << z << block;
@@ -282,10 +283,11 @@ void ServerCommandHandler::setupCallbacks() {
 			packet >> x >> y >> z;
 
 			ServerWorld &world = getWorldForClient(client.id);
-			world.onBlockDigged(x, y, z, Registry::getInstance().getBlock(world.getBlock(x, y, z)), *player);
+			const Block &blockDef = Registry::getInstance().getBlock(world.getBlock(x, y, z));
+			world.onBlockDigged(x, y, z, blockDef, *player);
 			world.setBlock(x, y, z, 0);
 
-			m_scriptEngine.luaCore().onEvent(LuaEventType::OnBlockDigged, glm::ivec3{x, y, z}, *player, world, client, *this);
+			m_scriptEngine.luaCore().onEvent(LuaEventType::OnBlockDigged, glm::ivec3{x, y, z}, blockDef, *player, world, client, *this);
 
 			Network::Packet answer;
 			answer << Network::Command::BlockUpdate << x << y << z << u32(0);