include/fggl/debug/logging.hpp

@@ -21,8 +21,12 @@
 
 #include <string_view>
 
+
+
 namespace fggl::debug {
 
+	std::string demangle(const char* name);
+
 	using FmtType = const std::string_view;
 	enum class Level;
 

include/fggl/display/glfw/module.hpp

@@ -29,18 +29,18 @@ namespace fggl::display {
 
 	struct GLFW {
 		constexpr static const char *name = "fggl::display::glfw";
-		constexpr static const std::array<modules::ModuleService, 1> provides = {
+		constexpr static const std::array<modules::ServiceName, 1> provides = {
 			WindowService::service
 		};
-		constexpr static const std::array<modules::ModuleService, 2> depends = {
+		constexpr static const std::array<modules::ServiceName, 2> depends = {
 			fggl::input::Input::service,
 			fggl::gfx::WindowGraphics::service
 		};
 
-		static bool factory(modules::ModuleService name, modules::Services &serviceManager);
+		static bool factory(modules::ServiceName name, modules::Services &serviceManager);
 	};
 
-	bool GLFW::factory(modules::ModuleService service, modules::Services &services) {
+	bool GLFW::factory(modules::ServiceName service, modules::Services &services) {
 		if (service == WindowService::service) {
 			auto input = services.get<input::Input>();
 			auto graphics = services.get<gfx::WindowGraphics>();

include/fggl/display/window.hpp

@@ -21,8 +21,10 @@
 
 #include "fggl/modules/module.hpp"
 #include "fggl/math/types.hpp"
+
 #include "fggl/gfx/interfaces.hpp"
 
+//! Classes responsible for interacting with display managers
 namespace fggl::display {
 
 	class Window {
@@ -30,12 +32,6 @@ namespace fggl::display {
 			virtual ~Window() = default;
 			virtual void activate() const = 0;
 
-			template<typename T, typename ...Args>
-			void make_graphics(Args... args) {
-				activate();
-				m_graphics = std::make_unique<T>(*this, args...);
-			}
-
 			// window-related getters
 			[[nodiscard]]
 			virtual math::vec2i frameSize() const = 0;
@@ -59,12 +55,12 @@ namespace fggl::display {
 			virtual bool isFullscreen() const = 0;
 
 		protected:
-			std::unique_ptr<gfx::Graphics> m_graphics;
+			gfx::Graphics* m_graphics;
 	};
 
 	class WindowService {
 		public:
-			constexpr static const modules::ModuleService
+			constexpr static const auto
 				service = modules::make_service("fggl::display::WindowService");
 
 			virtual Window *create() = 0;

include/fggl/ds/graph.hpp

+/*
+ * This file is part of FGGL.
+ *
+ * FGGL 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 3 of the License, or (at your option) any
+ * later version.
+ *
+ * FGGL 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 FGGL.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+//
+// Created by webpigeon on 25/03/23.
+//
+
+#ifndef FGGL_DS_GRAPH_HPP
+#define FGGL_DS_GRAPH_HPP
+
+#include <map>
+#include <vector>
+#include <queue>
+#include <stack>
+#include <set>
+
+namespace fggl::ds {
+
+	template<typename T>
+	class DirectedGraph {
+		public:
+
+			/**
+			 * Add a single edge to the graph.
+			 *
+			 * If the entry does not already exist, this will create the entry before adding the dependencies to it.
+			 * If the entry already exists, this will append the provided dependencies to its existing list.
+			 *
+			 * @param start the entry which depends something else
+			 * @param end the thing it depends on
+			 */
+			inline void addEdge(const T start, const T end) {
+				m_edges[start].push_back(end);
+				m_edges[end];
+			}
+
+			/**
+			 * Add a single vertex to the graph.
+			 */
+			 inline void addVertex(const T vertex) {
+				 m_edges[vertex];
+			 }
+
+			/**
+			 * Add a series of dependencies for an entry.
+			 *
+			 * If the entry does not already exist, this will create the entry before adding the dependencies to it.
+			 * If the entry already exists, this will append the provided dependencies to its existing list.
+			 *
+			 * @param name the entry having dependencies added
+			 * @param dependencies the things it depends on
+			 */
+			void addEdges(const T name, const std::vector<T> &dependencies) {
+				auto existing = m_edges.find(name);
+				if (existing == m_edges.end()) {
+					m_edges[name] = dependencies;
+				} else {
+					existing->second.insert(existing->second.end(), dependencies.begin(), dependencies.end());
+				}
+			}
+
+			/**
+			 * Clear all currently stored dependencies.
+			 *
+			 * This method will result in the dependency graph being empty, with no known modules.
+			 */
+			inline void clear() {
+				m_edges.clear();
+			}
+
+			inline auto begin() const {
+				return m_edges.begin();
+			}
+
+			inline auto end() const {
+				return m_edges.end();
+			}
+
+			bool getOrder(std::stack<T> &stack) {
+				std::set<T> visited{};
+
+				for (const auto &module : m_edges) {
+					if (!visited.contains(module.first)) {
+						sortUtil(module.first, visited, stack);
+					}
+				}
+
+				return true;
+			}
+
+			bool getOrderPartial(T first, std::stack<T> &stack) {
+				std::set<T> visited{};
+				sortUtil(first, visited, stack);
+				return true;
+			}
+
+			bool getOrderRev(std::queue<T> &stack) {
+				std::set<T> visited{};
+
+				for (const auto &module : m_edges) {
+					if (!visited.contains(module.first)) {
+						sortUtilRev(module.first, visited, stack);
+					}
+				}
+
+				return true;
+			}
+
+			bool getOrderPartialRev(T first, std::queue<T>& queue) {
+				std::set<T> visited{};
+				sortUtilRev(first, visited, queue);
+				return true;
+			}
+
+		private:
+			std::map<T, std::vector<T>> m_edges;
+
+			void sortUtil(T idx, std::set<T> &visited, std::stack<T> &stack) {
+				visited.emplace(idx);
+
+				for (auto dep : m_edges.at(idx)) {
+					if (!visited.contains(dep))
+						sortUtil(dep, visited, stack);
+				}
+
+				stack.push(idx);
+			}
+
+			void sortUtilRev(T idx, std::set<T> &visited, std::queue<T> &stack) {
+				visited.emplace(idx);
+
+				for (auto dep : m_edges.at(idx)) {
+					if (!visited.contains(dep))
+						sortUtilRev(dep, visited, stack);
+				}
+
+				stack.push(idx);
+			}
+	};
+
+} // namespace fggl::ds
+
+#endif //FGGL_DS_GRAPH_HPP

include/fggl/entity/entity.hpp

@@ -20,6 +20,8 @@
 #define FGGL_ENTITY_ENTITY_HPP
 
 #include <cstdint>
+#include <map>
+#include <vector>
 
 #include "fggl/debug/logging.hpp"
 #include "fggl/vendor/entt.hpp"
@@ -41,14 +43,15 @@ namespace fggl::entity {
 
 			template<typename Component, typename... Args>
 			inline Component &add(EntityID entity, Args &&... args) {
-				return m_registry.emplace<Component>(entity, std::forward<Args>(args)...);
+				return m_registry.get_or_emplace<Component>(entity, std::forward<Args>(args)...);
 			}
 
 			template<typename Component>
 			Component &get(EntityID entity) {
 				#ifndef NDEBUG
 				if (!has<Component>(entity)) {
-					debug::error("Entity {} has no component of type {}", (uint64_t) entity, typeid(Component).name());
+					debug::error("Entity {} has no component of type {}", (uint64_t) entity, debug::demangle(typeid(Component).name()));
+					assert(false && "Entity was missing component - use tryGet or fix definition");
 				}
 				#endif
 				return m_registry.get<Component>(entity);
@@ -65,8 +68,9 @@ namespace fggl::entity {
 			}
 
 			template<typename Component>
-			const Component *tryGet(EntityID entity) const {
-				return m_registry.try_get<Component>(entity);
+			const Component *tryGet(EntityID entity, const Component* defaultValue = nullptr) const {
+				auto* comp = m_registry.try_get<Component>(entity);
+				return comp == nullptr ? defaultValue : comp;
 			}
 
 			template<typename ...Components>
@@ -74,21 +78,74 @@ namespace fggl::entity {
 				return m_registry.view<Components...>();
 			}
 
+			EntityID findByName(const std::string& name) const {
+				auto itr = m_names.find(name);
+				if ( itr == m_names.end() ){
+					return INVALID;
+				}
+				return m_registry.valid(itr->second) ? itr->second : INVALID;
+			}
+
+			inline void setName(const std::string& name, EntityID eid ) {
+				if ( eid == INVALID ) {
+					m_names.erase(name);
+				} else {
+					assert(m_registry.valid(eid));
+					m_names[name] = eid;
+				}
+			}
+
 			template<typename ...Components>
 			bool has(EntityID idx) const {
 				return m_registry.template all_of<Components...>(idx);
 			}
 
-			inline bool exists(EntityID idx) {
+			bool hasTag(EntityID entity, fggl::util::GUID tag) {
+				const auto mapItr = m_tags.find( tag );
+				if ( mapItr == m_tags.end() || !m_registry.valid(entity) ) {
+					return false;
+				}
+				return std::find(mapItr->second.begin(), mapItr->second.end(), entity) != mapItr->second.end();
+			}
+
+			void addTag(const EntityID entity, const fggl::util::GUID tag) {
+				assert( m_registry.valid(entity) );
+				auto& tagged = m_tags[ tag ];
+				tagged.push_back( entity );
+			}
+
+			void removeTag(const EntityID entity, const fggl::util::GUID tag) {
+				auto mapItr = m_tags.find(tag);
+				if ( mapItr == m_tags.end() ) {
+					return;
+				}
+				std::remove_if( mapItr->second.begin(), mapItr->second.end(), [entity](auto other) { return other == entity;} );
+			}
+
+			inline std::vector<EntityID> findByTag(const char* tag) {
+				return findByTag( util::make_guid_rt(tag) );
+			}
+
+			std::vector<EntityID> findByTag(const fggl::util::GUID tag){
+				auto mapItr = m_tags.find(tag);
+				if ( mapItr == m_tags.end() ) {
+					return {};
+				}
+				return mapItr->second;
+			}
+
+			inline bool exists(EntityID idx) const {
 				return m_registry.valid(idx);
 			}
 
-			inline bool alive(EntityID idx) {
+			inline bool alive(EntityID idx) const {
 				return m_registry.valid(idx);
 			}
 
 		private:
 			entt::registry m_registry;
+			std::map<std::string, EntityID> m_names;
+			std::map<fggl::util::GUID, std::vector<EntityID>> m_tags;
 	};
 
 	struct Entity {

include/fggl/entity/gridworld/zone.hpp

@@ -34,17 +34,21 @@ namespace fggl::entity::grid {
 	template<typename T, uint32_t width, uint32_t height>
 	struct Grid {
 		public:
+
 			Grid() = default;
 
 			inline T& get(GridPos pos) {
+				assert(inBounds(pos));
 				return m_cells[getCellIndex(pos)];
 			}
 
 			const T& get(GridPos pos) const {
+				assert(inBounds(pos));
 				return m_cells[getCellIndex(pos)];
 			}
 
 			inline void set(GridPos pos, T value) {
+				assert(inBounds(pos));
 				m_cells[getCellIndex(pos)] = value;
 			}
 
@@ -54,10 +58,9 @@ namespace fggl::entity::grid {
 			}
 
 		private:
-			constexpr static math::vec2i size = math::vec2i(width, height);
+			constexpr static math::vec2i size = math::vec2ui(width, height);
 			std::array<T, size.x * size.y> m_cells;
 
-
 			inline uint32_t getCellIndex(GridPos pos) const {
 				assert( inBounds(pos));
 				return pos.y * size.x + pos.x;
@@ -94,39 +97,46 @@ namespace fggl::entity::grid {
 	template<uint32_t width, uint32_t height>
 	struct Area2D {
 		public:
+			constexpr static std::array<math::vec2i, 4> DIRECTIONS{{ {-1, 0}, {0, -1}, {1, 0}, {0, 1} }};
 			inline explicit Area2D(TileSet& tiles) : m_tiles(tiles) {
 				clear();
 			}
 
+			[[nodiscard]]
+			inline bool inBounds(GridPos pos) const {
+				return 0 <= pos.x && pos.x <= width
+				    && 0 <= pos.y && pos.y <= height;
+			}
+
 			void clear() {
 				WallState noWall;
 
-				for (auto x = 0U; x<width; ++x) {
-					for (auto y=0U; y<height; ++y) {
-						m_floors.set({x, y}, 0);
-						m_walls.set({x, y}, noWall);
+				for (auto xPos = 0U; xPos<width; ++xPos) {
+					for (auto yPos=0U; yPos<height; ++yPos) {
+						m_floors.set({xPos, yPos}, 0);
+						m_walls.set({xPos, yPos}, noWall);
 					}
 				}
 			}
 
-			inline FloorTile& floorAt(uint32_t x, uint32_t y) {
-				return m_tiles.m_floors.at( m_floors.get({x, y}) );
+			inline FloorTile& floorAt(uint32_t xPos, uint32_t yPos) {
+				return m_tiles.m_floors.at( m_floors.get({xPos, yPos}) );
 			}
 
-			inline void setFloorAt(uint32_t x, uint32_t y, uint32_t floor) {
-				m_floors.set({x, y}, floor);
+			inline void setFloorAt(uint32_t xPos, uint32_t yPos, uint32_t floor) {
+				m_floors.set({xPos, yPos}, floor);
 			}
 
-			inline WallTile& wallAt(uint32_t x, uint32_t y, bool north) {
+			inline WallTile& wallAt(uint32_t xPos, uint32_t yPos, bool north) {
 				if (north) {
-					return m_tiles.m_walls.at(m_walls.get({x, y}).north);
+					return m_tiles.m_walls.at(m_walls.get({xPos, yPos}).north);
 				} else {
-					return m_tiles.m_walls.at(m_walls.get({x, y}).west);
+					return m_tiles.m_walls.at(m_walls.get({xPos, yPos}).west);
 				}
 			}
 
-			inline void setWallAt(uint32_t x, uint32_t y, bool north, uint32_t wall) {
-				auto& state = m_walls.get({x, y});
+			inline void setWallAt(uint32_t xPos, uint32_t yPos, bool north, uint32_t wall) {
+				auto& state = m_walls.get({xPos, yPos});
 				if (north) {
 					state.north = wall;
 				} else {
@@ -135,26 +145,30 @@ namespace fggl::entity::grid {
 			}
 
 			inline bool canMove(GridPos pos) const {
-				return m_tiles.m_floors[m_floors.getCell(pos)] != 0;
+				if ( !inBounds(pos) ) {
+					return false;
+				}
+				return m_tiles.m_floors[m_floors.get(pos)].moveCost != FloorTile::IMPOSSIBLE;
 			}
 
 			inline bool canMove(GridPos pos, math::vec2i dir) const {
 				return canMove(pos + dir) && !blocked(pos, dir);
 			}
 
-			inline bool blocked(GridPos pos, math::vec2i dir) const {
-				if ( dir.x == -1 || dir.y == -1 ) {
-					return m_walls.getCell(pos) != 0;
-				} else {
-					m_walls.getCell(pos + dir) != 0;
-				}
-			}
+			inline bool blocked(GridPos pos, math::vec2i dir) const;
 
 			EntityManager& entities() {
 				return m_entities;
 			}
 
-			void neighbours(math::vec2i pos, std::vector<math::vec2i> &neighbours) const;
+			inline void neighbours(math::vec2i pos, std::vector<math::vec2i> &neighbours) const {
+				for (auto direction : DIRECTIONS) {
+					if ( canMove(pos, direction) ) {
+						auto result = pos + direction;
+						neighbours.push_back(result);
+					}
+				}
+			}
 		private:
 			TileSet& m_tiles;
 			Grid<uint32_t, width, height> m_floors;
@@ -162,6 +176,29 @@ namespace fggl::entity::grid {
 			EntityManager m_entities;
 	};
 
+	template<uint32_t width, uint32_t height>
+	bool Area2D<width, height>::blocked(GridPos pos, math::vec2i dir) const {
+		auto targetPos = pos;
+		if ( dir.x == 1 || dir.y == 1 ) {
+			targetPos = pos + dir;
+		}
+
+		if ( !inBounds(targetPos) ) {
+			return true;
+		}
+
+		auto& wallObj = m_walls.get(targetPos);
+		if ( dir.y != 0 ) {
+			return wallObj.north != 0;
+		}
+
+		if (dir.x != 0) {
+			return wallObj.west != 0;
+		}
+
+		return true;
+	}
+
 } // namespace fggl::entity::gridworld
 
 #endif //FGGL_ENTITY_GRIDWORLD_ZONE_HPP

include/fggl/entity/loader/loader.hpp

@@ -31,8 +31,10 @@
 
 namespace fggl::entity {
 
-	constexpr auto PROTOTYPE_ASSET = assets::AssetType::make("entity_prototype");
-	using FactoryFunc = std::function<void(const ComponentSpec &config, EntityManager &, const EntityID &)>;
+	constexpr auto ENTITY_PROTOTYPE = assets::make_asset_type("entity/prototype");
+	constexpr auto ENTITY_SCENE = assets::make_asset_type("entity/scene");
+
+	using FactoryFunc = std::function<void(const ComponentSpec &config, EntityManager &, const EntityID &, modules::Services &svc)>;
 	using CustomiseFunc = std::function<void(EntityManager &, const EntityID &)>;
 
 	struct FactoryInfo {
@@ -42,37 +44,47 @@ namespace fggl::entity {
 
 	class EntityFactory {
 		public:
-			constexpr static const modules::ModuleService service = modules::make_service("fggl::entity:Factory");
+			constexpr static const modules::ServiceName service = modules::make_service("fggl::entity:Factory");
+
+			inline EntityFactory(modules::Services &services) : m_services(services) {}
 
 			EntityID create(const EntityType &spec, EntityManager &manager, const CustomiseFunc &customise = nullptr) {
-				try {
-					std::vector<CustomiseFunc> finishers;
+				std::vector<CustomiseFunc> finishers;
 
-					// set up the components for the entity
-					auto entity = setupComponents(spec, manager, finishers);
-					if (entity == entity::INVALID) {
-						debug::error("Error attempting to create entity with type {}", std::to_string(spec.get()));
-						return entity::INVALID;
-					}
+				// build the setup
+				auto entity = setupComponents(spec, manager, finishers);
+				if ( entity == entity::INVALID ) {
+					debug::error("EntityFactory: failed to build from prototype {}", std::to_string(spec.get()));
+					return entity::INVALID;
+				}
 
-					// allow the caller to perform any setup needed
-					if (customise != nullptr) {
-						customise(manager, entity);
-					}
+				// if requested, allow the user to customize the creation
+				if ( customise != nullptr ) {
+					customise(manager, entity);
+				}
 
-					// finally, we run any cleanup/init setups required by the component factories
-					for (auto &finisher : finishers) {
-						finisher(manager, entity);
-					}
+				// run finishers for components
+				for ( auto& finisher : finishers ) {
+					finisher( manager, entity );
+				}
+
+				// use metadata to finalise
+				processTags(manager, entity, spec);
+
+				return entity;
+			}
+
+			void processTags(EntityManager& manager, EntityID id, EntityType spec) {
+				auto type = m_prototypes.at(spec);
+				for ( auto& tag : type.tags ) {
+					manager.addTag(id, tag);
+				}
+			}
 
-					return entity;
-				} catch (std::out_of_range &ex) {
-					#ifndef NDEBUG
-					debug::log(debug::Level::error,
-							   "EntityFactory: Unknown entity type '{}'",
-							   fggl::util::guidToString(spec));
-					#endif
-					return fggl::entity::INVALID;
+			void log_known_types() const {
+				debug::debug("dumping known types:");
+				for(const auto& [k,v] : m_factories) {
+					debug::debug("\ttype: {}", k);
 				}
 			}
 
@@ -90,19 +102,34 @@ namespace fggl::entity {
 				m_factories.erase(configNode);
 			}
 
+			inline FactoryInfo& getInfo(ComponentID comp) {
+				return m_factories.at(comp);
+			}
+
 		private:
+			modules::Services m_services;
 			std::map<ComponentID, FactoryInfo> m_factories;
 			std::map<EntityType, EntitySpec> m_prototypes;
 
 			entity::EntityID setupComponents(EntityType entityType,
 											 EntityManager &manager,
 											 std::vector<CustomiseFunc> &finishers) {
+				assert(entityType != NO_PARENT && "setup components called with NO_PARENT?!");
+
 				auto entity = manager.create();
 				std::vector<ComponentID> loadedComps;
 
 				auto currentType = entityType;
 				while (currentType != NO_PARENT) {
-					auto &entitySpec = m_prototypes.at(currentType);
+					const auto& specEntry = m_prototypes.find( currentType );
+					if ( specEntry == m_prototypes.end() ) {
+						debug::warning("Asked to setup {}, for {} but was not a known prototype", specEntry->first, entityType);
+						return entity::INVALID;
+					}
+
+					auto entitySpec = specEntry->second;
+					debug::debug("constructing {} for {} ({} comps)", currentType, entityType, entitySpec.components.size());
+					assert( entitySpec.ordering.size() == entitySpec.components.size() && "ordering incorrect size, bad things happend!" );
 
 					for (auto &component : entitySpec.ordering) {
 						// skip comps loaded by children
@@ -115,17 +142,14 @@ namespace fggl::entity {
 							loadedComps.push_back(component);
 
 							auto &info = m_factories.at(component);
-							info.factory(data, manager, entity);
+							info.factory(data, manager, entity, m_services);
 
 							if (info.finalise != nullptr) {
 								finishers.push_back(info.finalise);
 							}
 						} catch (std::out_of_range &ex) {
-							#ifndef NDEBUG
-							debug::log(debug::Level::error,
-									   "EntityFactory: Unknown component factory type '{}'",
-									   fggl::util::guidToString(component));
-							#endif
+							debug::error( "EntityFactory: Unknown component factory type '{}'", component );
+							log_known_types();
 							manager.destroy(entity);
 							return entity::INVALID;
 						}
@@ -149,7 +173,8 @@ namespace fggl::entity {
 			}
 	};
 
-	assets::AssetRefRaw load_prototype(EntityFactory *factory, const assets::AssetGUID &guid, assets::AssetData data);
+	assets::AssetRefRaw load_prototype(assets::Loader* loader, const assets::AssetID &guid, const assets::LoaderContext& data, EntityFactory* factory);
+	assets::AssetRefRaw load_scene(assets::Loader* loader, const assets::AssetID& asset, const assets::LoaderContext& data, void* ptr);
 
 } // namespace fggl::entity
 

include/fggl/entity/loader/spec.hpp

@@ -51,8 +51,14 @@ namespace fggl::entity {
 
 	struct EntitySpec {
 		EntityType parent = NO_PARENT;
+		std::vector<util::GUID> tags;
 		std::vector<ComponentID> ordering;
 		std::map<ComponentID, ComponentSpec> components;
+
+		inline void addComp(ComponentID cmp, const ComponentSpec& spec) {
+			components[cmp] = spec;
+			ordering.push_back(cmp);
+		}
 	};
 
 } // namespace fggl::entity

include/fggl/entity/module.hpp

@@ -22,19 +22,23 @@
 #include "fggl/modules/module.hpp"
 #include "fggl/assets/loader.hpp"
 
+#include "fggl/assets/packed/adapter.hpp"
 #include "fggl/entity/loader/loader.hpp"
 
 namespace fggl::entity {
 
+	constexpr auto MIME_SCENE = assets::from_mime("x-fggl/scene");
+
 	struct ECS {
 		constexpr static const char *name = "fggl::entity::ECS";
-		constexpr static const std::array<modules::ModuleService, 1> provides = {
+		constexpr static const std::array<modules::ServiceName, 1> provides = {
 			EntityFactory::service
 		};
-		constexpr static const std::array<modules::ModuleService, 1> depends = {
-			assets::Loader::service
+		constexpr static const std::array<modules::ServiceName, 2> depends = {
+			assets::Loader::service,
+			assets::CheckinAdapted::service
 		};
-		static bool factory(modules::ModuleService name, modules::Services &serviceManager);
+		static bool factory(modules::ServiceName name, modules::Services &serviceManager);
 	};
 
 	void install_component_factories(EntityFactory *factory);

include/fggl/gfx/camera.hpp

@@ -27,6 +27,10 @@ namespace fggl::gfx {
 		float fov = glm::radians(45.0f);
 		float nearPlane = 0.1f;
 		float farPlane = 100.0f;
+
+		inline math::mat4 perspective() const {
+			return glm::perspective(fov, aspectRatio, nearPlane, farPlane);
+		}
 	};
 
 	inline math::mat4 calc_proj_matrix(const Camera &camera) {

include/fggl/gfx/interfaces.hpp

@@ -23,6 +23,7 @@
 #include "fggl/entity/entity.hpp"
 #include "fggl/modules/module.hpp"
 
+//! Classes responsible for rendering content
 namespace fggl::gfx {
 
 	struct Bounds {
@@ -34,7 +35,7 @@ namespace fggl::gfx {
 
 	class Graphics {
 		public:
-			constexpr static const modules::ModuleService service = modules::make_service("fggl::gfx::Graphics");
+			constexpr static const auto service = modules::make_service("fggl::gfx::Graphics");
 
 			virtual ~Graphics() = default;
 			virtual void clear() = 0;
@@ -43,7 +44,7 @@ namespace fggl::gfx {
 			virtual Bounds canvasBounds() = 0;
 			virtual void draw2D(const Paint &paint) = 0;
 
-			virtual void drawScene(entity::EntityManager &) = 0;
+			virtual void drawScene(entity::EntityManager &, bool debugMode = false) = 0;
 	};
 
 } // namespace fggl::gfx

include/fggl/gfx/ogl/backend.hpp

@@ -24,7 +24,6 @@
  * FGGL OpenGL 4.x rendering backend.
  */
 namespace fggl::gfx {
-
 }
 
 #endif

include/fggl/gfx/ogl/renderer.hpp

@@ -30,21 +30,7 @@
 
 namespace fggl::gfx {
 
-	enum GlRenderType {
-		triangles = GL_TRIANGLES,
-		triangle_strip = GL_TRIANGLE_STRIP
-	};
-
-	struct GlRenderToken {
-		constexpr static const char name[] = "RenderToken";
-		GLuint vao;
-		GLuint buffs[2];
-		GLuint idxOffset;
-		GLsizei idxSize;
-		GLuint pipeline;
-		GLuint restartVertex;
-		GlRenderType renderType = triangles;
-	};
+	using GlFunctionLoader = GLADloadproc;
 
 	/**
 	 * Class responsible for managing the OpenGL context.
@@ -55,7 +41,7 @@ namespace fggl::gfx {
 	 */
 	class OpenGL4Backend : public Graphics {
 		public:
-			explicit OpenGL4Backend(data::Storage *storage, gui::FontLibrary *fonts);
+			explicit OpenGL4Backend(data::Storage *storage, gui::FontLibrary *fonts, assets::AssetManager *assets, GlFunctionLoader loader);
 			~OpenGL4Backend() override = default;
 
 			// copy bad
@@ -91,12 +77,12 @@ namespace fggl::gfx {
 			 *
 			 * @param world the world to render
 			 */
-			void drawScene(entity::EntityManager &world) override;
+			void drawScene(entity::EntityManager &world, bool debugMode=false) override;
 
 			/**
 			 * Get the 2D canvas bounds.
 			 *
-			 * @return
+			 * @return the canvas bounds
 			 */
 			inline Bounds canvasBounds() override {
 				return m_canvasRenderer->bounds();
@@ -107,7 +93,7 @@ namespace fggl::gfx {
 			std::unique_ptr<ogl4::CanvasRenderer> m_canvasRenderer;
 			std::unique_ptr<ogl4::DebugRenderer> m_debugRenderer;
 			std::unique_ptr<ShaderCache> m_cache;
-			GLuint m_canvasPipeline;
+			std::shared_ptr<ogl::Shader> m_canvasPipeline;
 			data::Storage *m_storage;
 			gui::FontLibrary *m_fontLibrary;
 	};

include/fggl/gfx/ogl/shader.hpp

@@ -17,6 +17,8 @@
 
 #include <cstdio>
 #include <fggl/gfx/ogl/backend.hpp>
+#include "fggl/gfx/ogl/types.hpp"
+
 #include <fggl/data/storage.hpp>
 
 #include <filesystem>
@@ -63,15 +65,17 @@ namespace fggl::gfx {
 
 	class ShaderCache {
 		public:
+			using ShaderPtr = std::shared_ptr<ogl::Shader>;
+
 			ShaderCache(fggl::data::Storage *storage);
 			~ShaderCache() = default;
 
-			GLuint load(const ShaderConfig &config);
-			GLuint load(const ShaderSources &sources, bool allowBinaryCache);
+			ShaderPtr load(const ShaderConfig &config);
+			ShaderPtr load(const ShaderSources &sources, bool allowBinaryCache);
 
-			GLuint getOrLoad(const ShaderConfig &config);
+			ShaderPtr getOrLoad(const ShaderConfig &config);
 
-			GLuint get(const std::string &name);
+			ShaderPtr get(const std::string &name);
 
 			/**
 			 * Fallback pipelines.
@@ -83,7 +87,7 @@ namespace fggl::gfx {
 
 		private:
 			fggl::data::Storage* m_storage;
-			std::unordered_map<std::string, GLuint> m_shaders;
+			std::unordered_map<std::string, ShaderPtr> m_shaders;
 
 			// extensions
 			void setupIncludes();

include/fggl/gfx/ogl/types.hpp

@@ -27,6 +27,7 @@
 
 #include "fggl/gfx/ogl/common.hpp"
 #include "fggl/math/types.hpp"
+#include "fggl/data/texture.hpp"
 
 namespace fggl::gfx::ogl {
 
@@ -68,11 +69,15 @@ namespace fggl::gfx::ogl {
 			inline Location uniform(const std::string_view &name) const {
 				auto location = glGetUniformLocation(m_obj, name.data());
 				if (location == -1) {
-					std::cerr << "error: " << name << " does not exist" << std::endl;
+					debug::warning("uniform {} does not exist", name);
 				}
 				return location;
 			}
 
+			inline GLuint shaderID() {
+				return m_obj;
+			}
+
 			// primatives
 			inline void setUniformF(Location name, GLfloat value) {
 				glProgramUniform1f(m_obj, name, value);
@@ -168,14 +173,14 @@ namespace fggl::gfx::ogl {
 
 	enum class PixelFormat {
 		UNSIGNED_BYTE = GL_UNSIGNED_BYTE,
-		BYTE,
-		UNSIGNED_SHORT,
-		SHORT,
-		UNSIGNED_INT,
-		INT,
-		HALF_FLOAT,
-		FLOAT,
-
+		BYTE = GL_BYTE,
+		UNSIGNED_SHORT = GL_UNSIGNED_SHORT,
+		SHORT = GL_SHORT,
+		UNSIGNED_INT = GL_UNSIGNED_INT,
+		INT = GL_INT,
+		//HALF_FLOAT = GL_HALF_FLOAT,
+		FLOAT = GL_FLOAT,
+/*
 		UNSIGNED_BYTE_3_3_2,
 		UNSIGNED_BYTE_2_3_3_REV,
 		UNSIGNED_SHORT_5_6_5,
@@ -187,7 +192,7 @@ namespace fggl::gfx::ogl {
 		UNSIGNED_INT_8_8_8_8,
 		UNSIGNED_INT_8_8_8_8_REV,
 		UNSIGNED_INT_10_10_10_10_2,
-		UNSIGNED_INT_10_10_10_10_2_REV,
+		UNSIGNED_INT_10_10_10_10_2_REV,*/
 	};
 
 	enum class InternalImageFormat {
@@ -201,27 +206,181 @@ namespace fggl::gfx::ogl {
 
 	enum class ImageFormat {
 		R = GL_RED,
-		RG,
-		RGB,
-		RGBA,
-		R_INT,
-		RG_INT,
-		RGB_INT,
-		RGBA_INT,
-		BGR,
-		BGRA,
-		BGR_INT,
-		BGRA_INT,
-		STENTICL_INDEX,
-		DEPTH_COMPONENT,
-		DEPTH_STENCIL
+		RG = GL_RG,
+		RGB = GL_RGB,
+		RGBA = GL_RGBA,
+		R_INT = GL_RED_INTEGER,
+		RG_INT = GL_RG_INTEGER,
+		RGB_INT = GL_RGB_INTEGER,
+		RGBA_INT = GL_RGBA_INTEGER,
+		BGR = GL_BGR,
+		BGRA = GL_BGRA,
+		BGR_INT = GL_BGR_INTEGER,
+		BGRA_INT = GL_BGRA_INTEGER,
+		STENTICL_INDEX = GL_STENCIL_INDEX,
+		DEPTH_COMPONENT = GL_DEPTH_COMPONENT,
+		DEPTH_STENCIL = GL_DEPTH_STENCIL
 	};
 
-	struct Image {
+	struct PixelDataArray {
 		PixelFormat type;
+		union {
+			unsigned char *uc;
+			char *c;
+			std::uint16_t *us;
+			std::int16_t *s;
+			float *f;
+			std::int32_t *i;
+			std::uint32_t *ui;
+		};
+		bool owning;
+
+		inline PixelDataArray(PixelFormat fmt, std::size_t size) : type(fmt), owning(true) {
+			switch (type) {
+				case PixelFormat::UNSIGNED_BYTE:
+					uc = new unsigned char[size];
+					break;
+				case PixelFormat::BYTE:
+					c = new char[size];
+					break;
+				case PixelFormat::UNSIGNED_SHORT:
+					us = new std::uint16_t[size];
+					break;
+				case PixelFormat::SHORT:
+					s = new std::int16_t[size];
+					break;
+				case PixelFormat::FLOAT:
+					f = new float[size];
+					break;
+				case PixelFormat::INT:
+					i = new std::int32_t[size];
+					break;
+				case PixelFormat::UNSIGNED_INT:
+					ui = new std::uint32_t[size];
+					break;
+			}
+		}
+
+		inline explicit PixelDataArray(unsigned char* data) : type(PixelFormat::UNSIGNED_BYTE), uc(data), owning(false) {}
+		inline explicit PixelDataArray(char* data) : type(PixelFormat::BYTE), c(data), owning(false) {}
+
+		// no copy
+		PixelDataArray(const PixelDataArray&) = delete;
+		PixelDataArray& operator=(const PixelDataArray&) = delete;
+
+		// move ok
+		PixelDataArray(PixelDataArray&& other) : type(other.type), owning(other.owning) {
+			switch (type) {
+				case PixelFormat::UNSIGNED_BYTE:
+					uc = other.uc;
+					other.uc = nullptr;
+					break;
+				case PixelFormat::BYTE:
+					c = other.c;
+					other.c = nullptr;
+					break;
+				case PixelFormat::UNSIGNED_SHORT:
+					us = other.us;
+					other.us = nullptr;
+					break;
+				case PixelFormat::SHORT:
+					s = other.s;
+					other.s = nullptr;
+					break;
+				case PixelFormat::FLOAT:
+					f = other.f;
+					other.f = nullptr;
+					break;
+				case PixelFormat::INT:
+					i = other.i;
+					other.i = nullptr;
+					break;
+				case PixelFormat::UNSIGNED_INT:
+					ui = other.ui;
+					other.ui = nullptr;
+					break;
+			}
+		}
+
+		inline ~PixelDataArray() {
+			if (owning) {
+				switch (type) {
+				case PixelFormat::UNSIGNED_BYTE: delete[] uc;
+					uc = nullptr;
+					break;
+				case PixelFormat::BYTE: delete[] c;
+					c = nullptr;
+					break;
+				case PixelFormat::UNSIGNED_SHORT: delete[] us;
+					us = nullptr;
+					break;
+				case PixelFormat::SHORT: delete[] s;
+					s = nullptr;
+					break;
+				case PixelFormat::FLOAT: delete[] f;
+					f = nullptr;
+					break;
+				case PixelFormat::INT: delete[] i;
+					i = nullptr;
+					break;
+				case PixelFormat::UNSIGNED_INT:
+					delete[] ui;
+					ui = nullptr;
+					break;
+				}
+			}
+		}
+
+		void* data() {
+			switch (type) {
+				case PixelFormat::UNSIGNED_BYTE:
+					return uc;
+				case PixelFormat::BYTE:
+					return c;
+				case PixelFormat::UNSIGNED_SHORT:
+					return us;
+				case PixelFormat::SHORT:
+					return s;
+				case PixelFormat::FLOAT:
+					return f;
+				case PixelFormat::INT:
+					return i;
+				case PixelFormat::UNSIGNED_INT:
+					return ui;
+			}
+
+			// unknown type?
+			return nullptr;
+		}
+
+	};
+
+	struct Image {
 		ImageFormat format;
 		math::vec2i size;
-		void *data;
+		PixelDataArray data;
+
+		//Image() = default;
+
+		inline Image(ImageFormat fmt, PixelFormat pxFmt, math::vec2i asize) :
+			format(fmt),
+			size(asize),
+			data(pxFmt, asize.x * asize.y){}
+
+		inline Image(ImageFormat fmt, math::vec2i asize, PixelDataArray&& adata) :
+			format(fmt),
+			size(asize),
+			data(std::move(adata)) {}
+
+		Image(const Image&) = delete;
+
+		inline PixelFormat type() const {
+			return data.type;
+		}
+
+		void* dataPtr() {
+			return data.data();
+		}
 	};
 
 	class Texture {
@@ -238,8 +397,7 @@ namespace fggl::gfx::ogl {
 				//bind();
 				glBindTexture((GLenum) m_type, m_obj);
 				if (iFmt == InternalImageFormat::DepthComponent) {
-					glTexImage2D((GLenum)
-									 m_type,
+					glTexImage2D((GLenum)m_type,
 								 0,
 								 (GLint) iFmt,
 								 size.x,
@@ -254,6 +412,25 @@ namespace fggl::gfx::ogl {
 				}
 			}
 
+			void setData(InternalImageFormat iFmt, Image &image, PixelFormat extFormat) {
+				//bind();
+				glBindTexture((GLenum) m_type, m_obj);
+				glTexImage2D((GLenum) m_type,
+					0,
+					(GLint) iFmt,
+					image.size.x,
+					image.size.y,
+					0,
+					(GLenum) image.format,
+					(GLenum) extFormat,
+					image.dataPtr());
+
+				if ( m_type == TextureType::Tex2D ) {
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+				}
+			}
+
 			void setData(InternalImageFormat iFmt, Image &image) {
 				//bind();
 				glBindTexture((GLenum) m_type, m_obj);
@@ -264,8 +441,47 @@ namespace fggl::gfx::ogl {
 							 image.size.y,
 							 0,
 							 (GLenum) image.format,
-							 (GLenum) image.type,
-							 image.data);
+							 (GLenum) image.type(),
+							 image.dataPtr());
+
+				if ( m_type == TextureType::Tex2D ) {
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+				}
+			}
+
+			void setData(InternalImageFormat iFmt, const data::Texture2D *image) {
+
+				ImageFormat imageFormat;
+				if (image->channels == 1) {
+					imageFormat = ImageFormat::R;
+				} else if ( image->channels == 2) {
+					imageFormat = ImageFormat::RG;
+				} else if ( image->channels == 3) {
+					imageFormat = ImageFormat::RGB;
+				} else if ( image->channels == 4) {
+					imageFormat = ImageFormat::RGBA;
+				} else {
+					// unknown image format -> channels mapping, having a bad day!
+					return;
+				}
+
+				//bind();
+				glBindTexture((GLenum) m_type, m_obj);
+				glTexImage2D((GLenum) m_type,
+							 0,
+							 (GLint) iFmt,
+							 image->size.x,
+							 image->size.y,
+							 0,
+							 (GLenum) imageFormat,
+							 GL_UNSIGNED_BYTE,
+							 image->data);
+
+				if ( m_type == TextureType::Tex2D ) {
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+					glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+				}
 			}
 
 			void setDataPart(math::vec2i offset, Image &image) {
@@ -276,8 +492,8 @@ namespace fggl::gfx::ogl {
 							 image.size.x,
 							 image.size.y,
 							 (GLenum) image.format,
-							 (GLenum) image.type,
-							 image.data);
+							 (GLenum) image.type(),
+							 image.dataPtr());
 			}
 
 			void wrapMode(Wrapping wrap);
@@ -302,6 +518,8 @@ namespace fggl::gfx::ogl {
 			void release();
 	};
 
+	constexpr std::size_t NO_RESTART_IDX = 0;
+
 	enum class BuffAttrF {
 		HALF_FLOAT = GL_HALF_FLOAT,
 		FLOAT = GL_FLOAT,
@@ -323,7 +541,7 @@ namespace fggl::gfx::ogl {
 		UINT_PACKED_F = GL_UNSIGNED_INT_10F_11F_11F_REV
 	};
 
-	enum class Primative {
+	enum class Primitive {
 		POINT = GL_POINT,
 		LINE = GL_LINES,
 		LINE_STRIP = GL_LINE_STRIP,
@@ -459,7 +677,7 @@ namespace fggl::gfx::ogl {
 		std::size_t offset;
 	};
 
-	// type intrincs to make interface nicer
+	// type intrinsics to make interface nicer
 	template<typename T>
 	struct attr_type {
 		const static BuffAttrF attr;
@@ -508,8 +726,8 @@ namespace fggl::gfx::ogl {
 			void setAttribute(const ArrayBuffer &buffer, GLuint idx, AttributeI &attr, bool normalized);
 			void setAttributeI(const ArrayBuffer &buffer, GLuint idx, AttributeI &attr);
 
-			void drawElements(const ElementBuffer &buff, Primative drawType, std::size_t size);
-			void draw(Primative drawType, int first, std::size_t count);
+			void drawElements(const ElementBuffer &buff, Primitive drawType, std::size_t size);
+			void draw(Primitive drawType, int first, std::size_t count);
 	};
 
 	// paranoid functions

include/fggl/gfx/ogl4/canvas.hpp

@@ -30,7 +30,7 @@ namespace fggl::gfx::ogl4 {
 	class CanvasRenderer {
 		public:
 			CanvasRenderer(gui::FontLibrary *fonts);
-			void render(GLuint shader, const gfx::Paint &paint);
+			void render(ogl::Shader& shader, const gfx::Paint &paint);
 
 			inline gfx::Bounds bounds() const {
 				return m_bounds;
@@ -44,8 +44,8 @@ namespace fggl::gfx::ogl4 {
 			gui::FontLibrary *m_fonts;
 			ogl::Texture m_fontTex;
 
-			void renderShapes(const Paint &paint, GLuint shader);
-			void renderText(const Paint &, GLuint shader);
+			void renderShapes(const Paint &paint, ogl::Shader& shader);
+			void renderText(const Paint &, ogl::Shader& shader);
 	};
 
 } // namespace fggl::gfx::ogl4

include/fggl/gfx/ogl4/debug.hpp

@@ -25,13 +25,13 @@ namespace fggl::gfx::ogl4 {
 
 	class DebugRenderer : public dd::RenderInterface {
 		public:
-			explicit DebugRenderer(GLuint shader);
+			explicit DebugRenderer(std::shared_ptr<ogl::Shader> shader);
 			~DebugRenderer() override = default;
 			void drawLineList(const dd::DrawVertex *lines, int count, bool depthEnabled) override;
 
 			math::mat4 mvpMatrix;
 		private:
-			ogl::Shader m_lineShader;
+			std::shared_ptr<ogl::Shader> m_lineShader;
 			ogl::Location m_lineShaderMVP;
 			ogl::VertexArray m_lineVao;
 			ogl::ArrayBuffer m_lineVbo;

include/fggl/gfx/ogl4/fallback.hpp

@@ -19,6 +19,8 @@
 #ifndef FGGL_GFX_OGL4_FALLBACK_HPP
 #define FGGL_GFX_OGL4_FALLBACK_HPP
 
+#include "fggl/assets/types.hpp"
+
 /**
  * Fallback shaders.
  *
@@ -58,6 +60,14 @@ namespace fggl::gfx::ogl4 {
 			fragColour = vec4(colour.xyz, texture(tex, texPos).r);
 		})glsl";
 
+	constexpr const GLuint TEX_CHECKER = 0x11FF11FF; //FIXME pixel order is reversed?!
+	constexpr const GLuint TEX_WHITE = 0xFF0000FF;
+
+	constexpr const assets::AssetID FALLBACK_TEX = assets::make_asset_id("fallback", "FALLBACK_TEX");
+	constexpr const assets::AssetID FALLBACK_MAT = assets::make_asset_id("fallback", "FALLBACK_MAT");
+	constexpr const assets::AssetID SOLID_TEX = assets::make_asset_id("fallback", "SOLID_TEX");
+	constexpr const math::vec3 FALLBACK_COLOUR {1.0F, 0.0F, 1.0F};
+
 } // namespace fggl::gfx::ogl4
 
 #endif //FGGL_GFX_OGL4_FALLBACK_HPP

include/fggl/gfx/ogl4/meshes.hpp

+/*
+ * This file is part of FGGL.
+ *
+ * FGGL 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 3 of the License, or (at your option) any
+ * later version.
+ *
+ * FGGL 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 FGGL.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+//
+// Created by webpigeon on 22/10/22.
+//
+
+#ifndef FGGL_GFX_OGL4_MESHES_HPP
+#define FGGL_GFX_OGL4_MESHES_HPP
+
+#include "fggl/mesh/components.hpp"
+#include "fggl/entity/entity.hpp"
+#include "fggl/assets/manager.hpp"
+
+#include "fggl/gfx/ogl/types.hpp"
+#include "fggl/gfx/ogl4/fallback.hpp"
+
+#include "fggl/gfx/camera.hpp"
+#include "fggl/gfx/phong.hpp"
+
+namespace fggl::gfx::ogl4 {
+
+	struct DrawType {
+		ogl::Primitive mode;
+		std::size_t restartIndex = ogl::NO_RESTART_IDX;
+	};
+
+	struct Material {
+		math::vec3 m_diffCol{1.0F, 1.0F, 1.0F};
+		math::vec3 m_specCol{1.0F, 1.0F, 1.0F};
+
+		ogl::Texture* m_diffuse;
+		ogl::Texture* m_normals;
+		ogl::Texture* m_specular;
+	};
+
+	struct MeshData {
+		std::shared_ptr<ogl::VertexArray> vao;
+		std::shared_ptr<ogl::ElementBuffer> elements;
+		std::shared_ptr<ogl::ArrayBuffer> vertexData;
+		std::size_t elementCount;
+		DrawType drawInfo;
+		Material* material;
+
+		void draw(std::shared_ptr<ogl::Shader> shader) const;
+	};
+
+
+	struct StaticMesh {
+		constexpr static auto name = "StaticMultiMesh";
+
+		std::shared_ptr<ogl::Shader> pipeline;
+		MeshData mesh;
+
+		inline void draw() const {
+			mesh.draw(pipeline);
+		}
+	};
+
+	struct StaticMultiMesh {
+		constexpr static auto name = "StaticMultiMesh";
+
+		std::shared_ptr<ogl::Shader> pipeline;
+		std::vector<MeshData> meshes;
+
+		void draw() const;
+	};
+
+	void setup_material(const std::shared_ptr<ogl::Shader>& shader, const PhongMaterial* material);
+	void setup_lighting(const std::shared_ptr<ogl::Shader>& shader, const math::mat4& viewMatrix, const math::Transform& camTransform, const math::Transform& transform, math::vec3 lightPos);
+
+	void setup_lighting(const std::shared_ptr<ogl::Shader>& shader, const DirectionalLight* light);
+
+	template<typename T>
+	void forward_pass(const entity::EntityID& camera, const fggl::entity::EntityManager& world, const assets::AssetManager* assets) {
+
+		// enable required OpenGL state
+		glEnable(GL_CULL_FACE);
+		glCullFace(GL_BACK);
+
+		// enable depth testing
+		glEnable(GL_DEPTH_TEST);
+
+		// prep the fallback textures
+		auto *fallbackTex = assets->template get<ogl::Texture>(FALLBACK_TEX);
+		fallbackTex->bind(0);
+		fallbackTex->bind(1);
+
+		// set-up camera matrices
+		const auto &camTransform = world.get<fggl::math::Transform>(camera);
+		const auto &camComp = world.get<fggl::gfx::Camera>(camera);
+
+		const math::mat4 projectionMatrix = camComp.perspective();
+		const math::mat4 viewMatrix = glm::lookAt(camTransform.origin(), camComp.target, camTransform.up());
+
+		std::shared_ptr<ogl::Shader> shader = nullptr;
+		ogl::Location mvpMatrixUniform = 0;
+		ogl::Location mvMatrixUniform = 0;
+
+		auto entityView = world.find<T>();
+
+		// find directional light in scene
+		const DirectionalLight* light = nullptr;
+		auto lightEnts = world.find<DirectionalLight>();
+		if ( !lightEnts.empty() ) {
+			light = world.tryGet<DirectionalLight>(lightEnts[0]);
+		}
+
+		for (const auto &entity : entityView) {
+			// ensure that the model pipeline actually exists...
+			const auto &model = world.get<T>(entity);
+			if (model.pipeline == nullptr) {
+				debug::warning("shader was null, aborting render");
+				continue;
+			}
+
+			// check if we switched shaders
+			if (shader == nullptr || shader->shaderID() != model.pipeline->shaderID()) {
+				// new shader - need to re-send the view and projection matrices
+				shader = model.pipeline;
+				shader->use();
+				if (shader->hasUniform("projection")) {
+					shader->setUniformMtx(shader->uniform("view"), viewMatrix);
+					shader->setUniformMtx(shader->uniform("projection"), projectionMatrix);
+				}
+				mvpMatrixUniform = shader->uniform("MVPMatrix");
+				mvMatrixUniform = shader->uniform("MVMatrix");
+
+				if ( shader->hasUniform("diffuseTexture") ) {
+					shader->setUniformI(shader->uniform("diffuseTexture"), 0);
+				}
+
+				if ( shader->hasUniform("specularTexture") ) {
+					shader->setUniformI(shader->uniform("specularTexture"), 1);
+				}
+			}
+
+			// set model transform
+			const auto &transform = world.get<math::Transform>(entity);
+			shader->setUniformMtx(mvpMatrixUniform, projectionMatrix * viewMatrix * transform.model());
+			shader->setUniformMtx(mvMatrixUniform, viewMatrix * transform.model());
+
+			// setup lighting mode
+			if ( light != nullptr ) {
+				setup_lighting(shader, light);
+			}
+			setup_material(shader, world.tryGet<PhongMaterial>(entity, &DEFAULT_MATERIAL));
+
+			// actually draw it
+			model.draw();
+		}
+	}
+
+	template<typename T>
+	void forward_pass_normals(const entity::EntityID& camera, const fggl::entity::EntityManager& world, const std::shared_ptr<ogl::Shader>& shader) {
+		// enable required OpenGL state
+		glEnable(GL_CULL_FACE);
+		glCullFace(GL_BACK);
+
+		// enable depth testing
+		glEnable(GL_DEPTH_TEST);
+
+		// set-up camera matrices
+		const auto &camTransform = world.get<fggl::math::Transform>(camera);
+		const auto &camComp = world.get<fggl::gfx::Camera>(camera);
+
+		const math::mat4 projectionMatrix = camComp.perspective();
+		const math::mat4 viewMatrix = glm::lookAt(camTransform.origin(), camComp.target, camTransform.up());
+
+		ogl::Location modelUniform = shader->uniform("model");
+		ogl::Location viewUniform = shader->uniform("view");
+		ogl::Location projUniform = shader->uniform("projection");
+
+		shader->use();
+		shader->setUniformMtx(projUniform, projectionMatrix);
+		shader->setUniformMtx(viewUniform, viewMatrix);
+
+		auto entities = world.find<T>();
+		for (const auto &entity : entities) {
+
+			// ensure that the model pipeline actually exists...
+			const auto &model = world.get<T>(entity);
+
+			// set model transform
+			const auto &transform = world.get<math::Transform>(entity);
+			shader->setUniformMtx(modelUniform, transform.model());
+
+			// render model
+			model.draw();
+		}
+	}
+
+	MeshData upload_mesh(const mesh::Mesh3D& meshComponent, assets::AssetManager* manager);
+	std::vector<MeshData> upload_multi_mesh(const mesh::MultiMesh3D& meshComponent, assets::AssetManager* manager);
+
+} // namespace fggl::gfx::ogl4
+
+#endif //FGGL_GFX_OGL4_MESHES_HPP

include/fggl/gfx/ogl4/models.hpp

@@ -26,9 +26,31 @@
 #include "fggl/gfx/ogl/backend.hpp"
 #include "fggl/gfx/ogl/types.hpp"
 
+#include "fggl/data/model.hpp"
+#include "fggl/mesh/mesh.hpp"
+
+#include "fggl/assets/manager.hpp"
+
+#define FGGL_ALLOW_DEFERRED_UPLOAD
+
 namespace fggl::gfx::ogl4 {
 
-	const std::size_t NO_RESTART_IDX = 0;
+
+	struct StaticModelGPU {
+		std::shared_ptr<ogl::VertexArray> vao;
+		std::shared_ptr<ogl::ElementBuffer> elements;
+		std::shared_ptr<ogl::ArrayBuffer> vertices;
+		std::size_t elementCount;
+		ogl::Primitive drawType = ogl::Primitive::TRIANGLE;
+		std::size_t restartIndex = ogl::NO_RESTART_IDX;
+	};
+
+	struct StaticModelInstance {
+		constexpr static auto name = "ogl::static::model";
+		std::string modelName;
+		StaticModelGPU* model = nullptr;
+		std::shared_ptr<ogl::Shader> pipeline;
+	};
 
 	struct StaticModel {
 		constexpr static auto name = "StaticModel";
@@ -41,15 +63,16 @@ namespace fggl::gfx::ogl4 {
 		std::shared_ptr<ogl::ArrayBuffer> vertexData;
 		std::size_t elementCount;
 
-		ogl::Primative drawType;
-		std::size_t restartIndex = NO_RESTART_IDX;
+		ogl::Primitive drawType;
+		std::size_t restartIndex = ogl::NO_RESTART_IDX;
 	};
 
 	class StaticModelRenderer {
 		public:
-			inline StaticModelRenderer(gfx::ShaderCache *cache)
-				: m_shaders(cache), m_phong(nullptr), m_vao(), m_vertexList(), m_indexList() {
-				m_phong = std::make_shared<ogl::Shader>(cache->get("phong"));
+			inline StaticModelRenderer(gfx::ShaderCache *cache, assets::AssetManager *assets)
+				: m_assets(assets), m_shaders(cache), m_phong(nullptr), m_vao(), m_vertexList(), m_indexList() {
+
+				m_phong = cache->get("redbook/debug");
 			}
 
 			~StaticModelRenderer() = default;
@@ -60,22 +83,31 @@ namespace fggl::gfx::ogl4 {
 			StaticModelRenderer &operator=(const StaticModelRenderer &other) = delete;
 			StaticModelRenderer &operator=(StaticModelRenderer &&other) = delete;
 
-			void render(entity::EntityManager &world) {
-				resolveModels(world);
-				renderModelsForward(world);
+			StaticModel* uploadMesh(assets::AssetID guid, const data::Mesh& mesh, bool allowCache=true);
+			StaticModelGPU* uploadMesh2(const assets::AssetID& meshName, const data::Mesh& mesh);
+
+			void render(entity::EntityManager &world, bool debugMode = false) {
+				#ifdef FGGL_ALLOW_DEFERRED_UPLOAD
+					resolveModels(world);
+				#endif
+				renderModelsForward(world, debugMode);
 			}
 
 		private:
-			/**
-			 * Attach any missing rendering components to models.
-			 */
-			void resolveModels(entity::EntityManager &world);
+
+			#ifdef FGGL_ALLOW_DEFERRED_UPLOAD
+				/**
+				 * Attach any missing rendering components to models.
+				 */
+				void resolveModels(entity::EntityManager &world);
+			#endif
 
 			/**
 			 * Render all visible objects according to their render tokens.
 			 */
-			void renderModelsForward(const entity::EntityManager &world);
+			void renderModelsForward(const entity::EntityManager &world, bool debugMode);
 
+			assets::AssetManager *m_assets;
 			gfx::ShaderCache *m_shaders;
 			std::shared_ptr<ogl::Shader> m_phong;
 			ogl::VertexArray m_vao;