add more related repos to the README

https://www.shadertoy.com/view/4djSRW (hash without sine)

README.md

@@ -13,7 +13,15 @@ The private repo had over 900 commits, before the first public release.
 - [Github](https://github.com/MadeOfJelly/MushMachine)
 - [Setup](docs/setup.md)
 - [Example Game Setup](docs/basic_game.md)
+- [mm_template](https://github.com/MadeOfJelly/mm_template) (a GitHub Template for quick starting MM game dev)
 - The [Docs Directory](docs/) contains Documentation loosely based on the Source structure.
+- Engine Extensions:
+  - [Box2D integration](https://github.com/Green-Sky/mushmachine_box2d)
+  - [fx_draw (simple line drawing rendertask)](https://github.com/Green-Sky/fx_draw)
+- Projects using the Engine:
+  - [miniTD](https://github.com/Green-Sky/miniTD)
+  - [LiteParticles2DDemo](https://github.com/MadeOfJelly/mm_lite_particles2d_demo)
+  - [mm_fireworks](https://github.com/Green-Sky/mm_fireworks)
 
 ## Platforms
 - PC (Linux, Windows and maybe APPLE(compiles))

external/tracy/CMakeLists.txt

@@ -1,29 +1,38 @@
 cmake_minimum_required(VERSION 3.2 FATAL_ERROR)
 
-add_library(tracy_client
+if(NOT EMSCRIPTEN)
-	"${CMAKE_CURRENT_LIST_DIR}/tracy/Tracy.hpp"
+	add_library(tracy_client
-	"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyLua.hpp"
+		"${CMAKE_CURRENT_LIST_DIR}/tracy/Tracy.hpp"
-	"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyVulkan.hpp"
+		"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyLua.hpp"
-	"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyOpenGL.hpp"
+		"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyVulkan.hpp"
+		"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyOpenGL.hpp"
 
-	"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyClient.cpp"
+		"${CMAKE_CURRENT_LIST_DIR}/tracy/TracyClient.cpp"
-)
+	)
 
-target_compile_features(tracy_client PUBLIC cxx_std_17)
+	if(TRACY_ENABLE)
+		target_compile_definitions(tracy_client PUBLIC TRACY_ENABLE)
+		#target_compile_definitions(tracy_client PUBLIC TRACY_NO_SYSTEM_TRACING)
+		message("Enabled TRACY")
+	endif()
 
-if(TRACY_ENABLE)
+	target_compile_features(tracy_client PUBLIC cxx_std_17)
-	target_compile_definitions(tracy_client PUBLIC TRACY_ENABLE)
+
-	#target_compile_definitions(tracy_client PUBLIC TRACY_NO_SYSTEM_TRACING)
+	target_include_directories(tracy_client PUBLIC "${CMAKE_CURRENT_LIST_DIR}")
-	message("Enabled TRACY")
+
+	if(UNIX)
+		target_link_libraries(tracy_client dl)
+	endif()
+
+	if(WIN32)
+		target_link_libraries(tracy_client ws2_32 dbghelp)
+	endif()
+else() # EMSCRIPTEN
+	add_library(tracy_client INTERFACE)
+
+	target_compile_features(tracy_client INTERFACE cxx_std_17)
+
+	target_include_directories(tracy_client INTERFACE "${CMAKE_CURRENT_LIST_DIR}")
 endif()
 
-target_include_directories(tracy_client PUBLIC "${CMAKE_CURRENT_LIST_DIR}")
-
-if(UNIX)
-	target_link_libraries(tracy_client dl)
-endif()
-
-if(WIN32)
-	target_link_libraries(tracy_client ws2_32 dbghelp)
-endif()
 

framework/imgui/src/mm/imgui/imgui_entt_entity_editor.hpp

@@ -85,8 +85,8 @@ private:
 
 	bool entityHasComponent(Registry& registry, EntityType& entity, ComponentTypeID type_id)
 	{
-		ComponentTypeID type[] = { type_id };
+		const auto storage_it = registry.storage(type_id);
-		return registry.runtime_view(std::cbegin(type), std::cend(type)).contains(entity);
+		return storage_it != registry.storage().end() && storage_it->second.contains(entity);
 	}
 
 public:
@@ -243,7 +243,16 @@ public:
 				}
 			});
 		} else {
-			auto view = registry.runtime_view(comp_list.begin(), comp_list.end());
+			entt::basic_runtime_view<entt::basic_sparse_set<EntityType>> view{};
+			for (const auto type : comp_list) {
+				auto storage_it = registry.storage(type);
+				if (storage_it != registry.storage().end()) {
+					view.iterate(registry.storage(type)->second);
+				}
+			}
+
+			// TODO: add support for exclude
+
 			ImGui::Text("%lu Entities Matching:", view.size_hint());
 
 			if (ImGui::BeginChild("entity list")) {
@@ -297,7 +306,8 @@ public:
 
 // MIT License
 
-// Copyright (c) 2020 Erik Scholz, Gnik Droy
+// Copyright (c) 2019-2022 Erik Scholz
+// Copyright (c) 2020 Gnik Droy
 
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal

framework/imgui/src/mm/imgui/widgets/camera.cpp

@@ -16,20 +16,20 @@ void Camera3D(MM::Scene& scene) {
 
 	ImGui::Indent();
 
-	auto* camera = scene.try_ctx<MM::OpenGL::Camera3D>();
+	if (!scene.ctx().contains<MM::OpenGL::Camera3D>()) {
-	if (!camera) {
 		ImGui::TextUnformatted("NO CAMERA!");
 		return;
 	}
+	auto& camera = scene.ctx().at<MM::OpenGL::Camera3D>();
 
 	static bool follow_entity = false;
 	static MM::Entity tracking = entt::null;
 
-	ImGui::InputFloat("screenRatio", &camera->screenRatio);
+	ImGui::InputFloat("screenRatio", &camera.screenRatio);
-	ImGui::InputFloat("nearPlane", &camera->nearPlane);
+	ImGui::InputFloat("nearPlane", &camera.nearPlane);
-	ImGui::InputFloat("farPlane", &camera->farPlane);
+	ImGui::InputFloat("farPlane", &camera.farPlane);
 
-	if (camera->ortho) {
+	if (camera.ortho) {
 		ImGui::TextUnformatted("orthographic mode");
 		ImGui::Checkbox("follow entity", &follow_entity);
 
@@ -39,39 +39,39 @@ void Camera3D(MM::Scene& scene) {
 			MM::ImGuiWidgets::Entity(tracking, scene);
 			if (scene.valid(tracking)) {
 				if (scene.all_of<MM::Components::Position2D>(tracking)) {
-					camera->translation = {scene.get<MM::Components::Position2D>(tracking).pos, 0.f};
+					camera.translation = {scene.get<MM::Components::Position2D>(tracking).pos, 0.f};
 				} else if (scene.all_of<MM::Components::Position3D>(tracking)) { // "3d" fallback
-					camera->translation = scene.get<MM::Components::Position3D>(tracking).pos;
+					camera.translation = scene.get<MM::Components::Position3D>(tracking).pos;
 				} else {
 					ImGui::TextUnformatted("error: Entity has neither Position2D nor Position3D");
 				}
 			}
 		} else {
-			ImGui::DragFloat2("translation", &camera->translation.x, 0.1f);
+			ImGui::DragFloat2("translation", &camera.translation.x, 0.1f);
 		}
 
 
-		ImGui::DragFloat("h_vp_size", &camera->horizontalViewPortSize, 0.1f);
+		ImGui::DragFloat("h_vp_size", &camera.horizontalViewPortSize, 0.1f);
 
 		// TODO: aspect ratio
 
 		// TODO: check for change
-		camera->setOrthographic();
+		camera.setOrthographic();
 	} else { // perspective
 		ImGui::TextUnformatted("perspective mode");
 
-		ImGui::DragFloat3("translation", &camera->translation.x, 0.1f);
+		ImGui::DragFloat3("translation", &camera.translation.x, 0.1f);
-		ImGui::SliderFloat("fov", &camera->fov, 0.1f, glm::pi<float>());
+		ImGui::SliderFloat("fov", &camera.fov, 0.1f, glm::pi<float>());
 
-		ImGui::SliderFloat("yaw", &camera->yaw, 0.0f, 2*glm::pi<float>());
+		ImGui::SliderFloat("yaw", &camera.yaw, 0.0f, 2*glm::pi<float>());
-		ImGui::SliderFloat("pitch", &camera->pitch, -glm::pi<float>()/2, glm::pi<float>()/2);
+		ImGui::SliderFloat("pitch", &camera.pitch, -glm::pi<float>()/2, glm::pi<float>()/2);
 
-		ImGui::InputFloat3("up", &camera->up.x);
+		ImGui::InputFloat3("up", &camera.up.x);
 
-		camera->setPerspective();
+		camera.setPerspective();
 	}
 
-	camera->updateView();
+	camera.updateView();
 
 	ImGui::Unindent();
 }

framework/imgui/src/mm/services/scene_tools.cpp

@@ -1,5 +1,4 @@
 #include "./scene_tools.hpp"
-#include "mm/components/velocity2d_rotation.hpp"
 
 #include <mm/engine.hpp>
 
@@ -32,10 +31,11 @@
 namespace MM::Services {
 
 	bool ImGuiSceneToolsService::enable(Engine& engine, std::vector<UpdateStrategies::TaskInfo>& task_array) {
-		if (!engine.tryService<MM::Services::SceneServiceInterface>()) {
+		// enable anyway
-			LOGIGS("error: no SceneServiceInterface");
+		//if (!engine.tryService<MM::Services::SceneServiceInterface>()) {
-			return false;
+			//LOGIGS("error: no SceneServiceInterface");
-		}
+			//return false;
+		//}
 
 		// setup entity editor defaults
 		{
@@ -71,14 +71,13 @@ namespace MM::Services {
 		};
 
 		menu_bar.menu_tree["Scene"]["TimeCtx"] = [this](Engine& e) {
-			MM::Components::TimeDelta* td_ptr = nullptr;
+			bool have_ctx = false;
 
 			if (auto* ssi_ptr = e.tryService<MM::Services::SceneServiceInterface>()) {
-				auto& scene = ssi_ptr->getScene();
+				have_ctx = ssi_ptr->getScene().ctx().contains<MM::Components::TimeDelta>();
-				td_ptr = scene.try_ctx<MM::Components::TimeDelta>();
 			}
 
-			ImGui::MenuItem("TimeDelta Context", NULL, &_show_time_delta_ctx, td_ptr);
+			ImGui::MenuItem("TimeDelta Context", NULL, &_show_time_delta_ctx, have_ctx);
 		};
 
 		// add task
@@ -102,6 +101,10 @@ namespace MM::Services {
 	}
 
 	void ImGuiSceneToolsService::renderImGui(Engine& engine) {
+		if (engine.tryService<MM::Services::SceneServiceInterface>() == nullptr) {
+			return; // no scene, nothing to see
+		}
+
 		auto& scene = engine.tryService<MM::Services::SceneServiceInterface>()->getScene();
 
 		if (_show_scene_metrics) {
@@ -153,10 +156,13 @@ namespace MM::Services {
 
 		if (_show_time_delta_ctx) {
 			if (ImGui::Begin("Scene TimeDelta Context", &_show_time_delta_ctx)) {
-				auto* td_ptr = scene.try_ctx<MM::Components::TimeDelta>();
+				if (scene.ctx().contains<MM::Components::TimeDelta>()) {
-				ImGui::Value("tickDelta", td_ptr->tickDelta);
+					auto& td = scene.ctx().at<MM::Components::TimeDelta>();
-				ImGui::SliderFloat("deltaFactor", &td_ptr->deltaFactor, 0.f, 10.f, "%.5f", ImGuiSliderFlags_Logarithmic);
+					ImGui::Value("tickDelta", td.tickDelta);
-
+					ImGui::SliderFloat("deltaFactor", &td.deltaFactor, 0.f, 10.f, "%.5f", ImGuiSliderFlags_Logarithmic);
+				} else {
+					ImGui::TextUnformatted("No TimeDelta");
+				}
 			}
 			ImGui::End();
 		}

framework/opengl_primitives/src/mm/opengl/buffer.cpp

@@ -6,20 +6,28 @@
 
 namespace MM::OpenGL {
 
-Buffer::Buffer(const void* data, std::size_t size, GLenum usage) : _size(size) {
+Buffer::Buffer(const void* data, std::size_t size, GLenum usage, GLenum target) : _size(size), _target(target) {
 	glGenBuffers(1, &_handle);
-	glBindBuffer(GL_ARRAY_BUFFER, _handle);
+	glBindBuffer(_target, _handle);
-	glBufferData(GL_ARRAY_BUFFER, size, data, usage);
+	glBufferData(_target, size, data, usage);
 }
 
 Buffer::~Buffer(void) {
-	glDeleteBuffers(1,&_handle);
+	glDeleteBuffers(1, &_handle);
+}
+
+void Buffer::bind(void) const {
+	glBindBuffer(_target, _handle);
 }
 
 void Buffer::bind(GLenum target) const {
 	glBindBuffer(target, _handle);
 }
 
+void Buffer::unbind(void) const {
+	glBindBuffer(_target, 0);
+}
+
 void Buffer::unbind(GLenum target) const {
 	glBindBuffer(target, 0);
 }
@@ -28,5 +36,9 @@ std::size_t Buffer::getSize(void) const {
 	return _size;
 }
 
+GLuint Buffer::getHandle(void) const {
+	return _handle;
+}
+
 } // MM::OpenGL
 

framework/opengl_primitives/src/mm/opengl/buffer.hpp

@@ -21,15 +21,20 @@ namespace MM::OpenGL {
 		private:
 			GLuint _handle = 0;
 			std::size_t _size = 0;
+			GLenum _target;
 
 		public:
-			Buffer(const void* data, std::size_t size, GLenum usage);
+			Buffer(const void* data, std::size_t size, GLenum usage, GLenum target = GL_ARRAY_BUFFER);
 			~Buffer(void);
 
+			void bind(void) const;
 			void bind(GLenum target) const;
+			void unbind(void) const;
 			void unbind(GLenum target) const;
 
 			std::size_t getSize(void) const;
+
+			GLuint getHandle(void) const;
 	};
 } // MM::OpenGL
 

framework/opengl_primitives/src/mm/opengl/shader.cpp

@@ -90,6 +90,7 @@ void Shader::setUniformMat3f(const std::string& name, const glm::mat3& matrix) {
 }
 
 // TODO: refactor this whole thing out
+// FIXME: hangs if trailing whitespace
 std::string Shader::parse(Engine& engine, const std::string& filePath) {
 	auto& fs = engine.getService<MM::Services::FilesystemService>();
 

framework/opengl_renderer/CMakeLists.txt

@@ -268,6 +268,27 @@ target_link_libraries(bloom
 	bloom_combine_render_task
 )
 
+############# lite_particles2d ###########
+
+add_library(lite_particles2d
+	src/mm/opengl/lite_particles2d_type.hpp
+	src/mm/opengl/lite_particles2d_type_loader.hpp
+	src/mm/opengl/lite_particles2d_type_loader.cpp
+
+	src/mm/opengl/components/lite_particles2d.hpp
+
+	src/mm/opengl/render_tasks/lite_particles2d.hpp
+	src/mm/opengl/render_tasks/lite_particles2d.cpp
+)
+
+target_include_directories(lite_particles2d PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/src")
+
+target_link_libraries(lite_particles2d
+	engine
+	opengl_renderer_s
+	common_components_serialize_json # glm serl
+)
+
 ########################
 
 if (BUILD_TESTING)

framework/opengl_renderer/src/mm/opengl/bloom.cpp

@@ -26,14 +26,16 @@ void setup_bloom(
 #ifdef MM_OPENGL_3_GLES
 	#if 0 // NOPE!!
 	// TODO: caps at 1, invest in half float?
-	const auto bloom_internal_format = GL_RGB565; // prolly fine
+	const auto bloom_internal_format = GL_RGB565; // prolly fine. NOPE its not. it causes green pixely halos
 	const auto bloom_format_type = GL_UNSIGNED_BYTE;
 	#else
-	const auto bloom_internal_format = GL_RGB16F;
+	//const auto bloom_internal_format = GL_RGBA16F;
+	const auto bloom_internal_format = GL_R11F_G11F_B10F;
 	const auto bloom_format_type = GL_FLOAT;
 	#endif
 #else
-	const auto bloom_internal_format = GL_RGB16F;
+	//const auto bloom_internal_format = GL_RGB16F;
+	const auto bloom_internal_format = GL_R11F_G11F_B10F;
 	const auto bloom_format_type = GL_FLOAT;
 #endif
 

framework/opengl_renderer/src/mm/opengl/components/lite_particles2d.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <glm/vec2.hpp>
+
+#include <queue> // tmp
+
+namespace MM::Components {
+
+	// not intended to be a component
+	// see LiteParticles2DUploadQueue
+	struct LiteParticle2D {
+		uint32_t type_id {0u}; // entt::hashed_string, ResourceManager
+
+		glm::vec2 pos {0.f, 0.f};
+		glm::vec2 vel {0.f, 0.f};
+
+		float age {0.f};
+	};
+
+	struct LiteParticles2DUploadQueue {
+		// TODO: vector
+		std::queue<LiteParticle2D> queue;
+	};
+
+} // MM::Components
+

framework/opengl_renderer/src/mm/opengl/lite_particles2d_type.hpp

@@ -0,0 +1,95 @@
+#pragma once
+
+#include <glm/vec4.hpp>
+
+#include <nlohmann/json.hpp>
+
+#include <mm/components/serialize/json_glm.hpp>
+#include <vector>
+
+namespace MM::OpenGL {
+
+	struct LiteParticles2DType {
+		struct Compute {
+			float age_delta;
+
+			glm::vec2 force_vec;
+
+			float turbulence;
+			float turbulence_noise_scale;
+			float turbulence_individuality;
+			float turbulence_time_scale;
+
+			float dampening;
+
+			static constexpr size_t _member_count = 8;
+		} compute;
+
+		struct Render {
+			glm::vec4 color_start;
+			glm::vec4 color_end;
+
+			float size_start;
+			float size_end;
+
+			static constexpr size_t _member_count = 10;
+		} render;
+
+		// naive, prob fine, not time critical
+		void upload(std::vector<float>& comp_vec, std::vector<float>& rend_vec) const {
+			{
+				comp_vec.push_back(compute.age_delta);
+
+				comp_vec.push_back(compute.force_vec.x);
+				comp_vec.push_back(compute.force_vec.y);
+
+				comp_vec.push_back(compute.turbulence);
+				comp_vec.push_back(compute.turbulence_noise_scale);
+				comp_vec.push_back(compute.turbulence_individuality);
+				comp_vec.push_back(compute.turbulence_time_scale);
+
+				comp_vec.push_back(compute.dampening);
+			}
+
+			{
+				rend_vec.push_back(render.color_start.r);
+				rend_vec.push_back(render.color_start.g);
+				rend_vec.push_back(render.color_start.b);
+				rend_vec.push_back(render.color_start.a);
+
+				rend_vec.push_back(render.color_end.r);
+				rend_vec.push_back(render.color_end.g);
+				rend_vec.push_back(render.color_end.b);
+				rend_vec.push_back(render.color_end.a);
+
+				rend_vec.push_back(render.size_start);
+				rend_vec.push_back(render.size_end);
+			}
+		}
+	};
+
+	NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(LiteParticles2DType::Compute,
+		age_delta,
+
+		force_vec,
+
+		turbulence,
+		turbulence_noise_scale,
+		turbulence_individuality,
+		turbulence_time_scale,
+
+		dampening
+	)
+
+	NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(LiteParticles2DType::Render,
+		color_start,
+		color_end,
+
+		size_start,
+		size_end
+	)
+
+	NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(LiteParticles2DType, compute, render)
+
+} // MM::OpenGL
+

framework/opengl_renderer/src/mm/opengl/lite_particles2d_type_loader.cpp

@@ -0,0 +1,39 @@
+#include "./lite_particles2d_type_loader.hpp"
+
+#include <mm/services/filesystem.hpp>
+
+#include <mm/logger.hpp>
+
+namespace MM::OpenGL {
+
+std::shared_ptr<LiteParticles2DType> LiteParticles2DTypeLoaderJson::load(const nlohmann::json& j) const {
+	auto new_type = std::make_shared<LiteParticles2DType>();
+
+	try {
+		*new_type = j;
+	} catch (...) {
+		SPDLOG_ERROR("failed parsing particle type json:\n{}", j.dump(2));
+		return nullptr;
+	}
+
+	return new_type;
+}
+
+std::shared_ptr<LiteParticles2DType> LiteParticles2DTypeLoaderFile::load(MM::Engine& engine, const std::string& path) const {
+	auto* fs = engine.tryService<MM::Services::FilesystemService>();
+	if (fs == nullptr) {
+		// TODO: error
+		return nullptr;
+	}
+
+	auto new_particle = LiteParticles2DTypeLoaderJson{}.load(fs->readJson(path.c_str()));
+
+	if (!new_particle) {
+		SPDLOG_ERROR("particle type file: '{}'", path);
+	}
+
+	return new_particle;
+}
+
+} // MM::OpenGL
+

framework/opengl_renderer/src/mm/opengl/lite_particles2d_type_loader.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "./lite_particles2d_type.hpp"
+
+#include <mm/engine_fwd.hpp>
+
+namespace MM::OpenGL {
+
+struct LiteParticles2DTypeLoaderJson final {
+	std::shared_ptr<LiteParticles2DType> load(const nlohmann::json& j) const;
+};
+
+struct LiteParticles2DTypeLoaderFile final {
+	std::shared_ptr<LiteParticles2DType> load(MM::Engine& engine, const std::string& path) const;
+};
+
+} // MM::OpenGL
+

framework/opengl_renderer/src/mm/opengl/render_tasks/batched_spritesheet.cpp

@@ -27,9 +27,6 @@
 namespace MM::OpenGL::RenderTasks {
 
 BatchedSpriteSheet::BatchedSpriteSheet(Engine& engine) {
-	default_cam.setOrthographic();
-	default_cam.updateView();
-
 	float vertices[] = {
 		-0.5f, 0.5f,
 		-0.5f, -0.5f,
@@ -70,6 +67,10 @@ void BatchedSpriteSheet::render(Services::OpenGLRenderer& rs, Engine& engine) {
 
 	auto& scene = ssi->getScene();
 
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	struct sp_data {
 		SpriteSheet sp;
 		struct instance_data {
@@ -116,12 +117,9 @@ void BatchedSpriteSheet::render(Services::OpenGLRenderer& rs, Engine& engine) {
 	_vertexBuffer->bind(GL_ARRAY_BUFFER);
 	_vao->bind();
 
-	auto* cam = scene.try_ctx<Camera3D>();
+	auto& cam = scene.ctx().at<Camera3D>();
-	if (!cam) {
-		cam = &default_cam;
-	}
 
-	auto vp = cam->getViewProjection();
+	auto vp = cam.getViewProjection();
 	_shader->setUniformMat4f("_VP", vp);
 
 	for (auto& sp_ent : batch_map) {

framework/opengl_renderer/src/mm/opengl/render_tasks/batched_spritesheet.hpp

@@ -37,8 +37,6 @@ namespace MM::OpenGL::RenderTasks {
 		public:
 			glm::vec4 default_color {1.f, 1.f, 1.f, 1.f};
 
-			OpenGL::Camera3D default_cam;
-
 			BatchedSpriteSheet(Engine& engine);
 			~BatchedSpriteSheet(void);
 

framework/opengl_renderer/src/mm/opengl/render_tasks/composition.cpp

@@ -125,6 +125,7 @@ R"(
 #endif
 
 #include "/shaders/builtin/tonemapping.glsl"
+#include "/shaders/builtin/hashing.glsl"
 
 uniform sampler2D color_tex;
 uniform sampler2D bloom_tex;
@@ -157,6 +158,9 @@ void main() {
 	_out_color = tonemapACESFilm(comp); // looks right
 	//_out_color = pow(tonemapACESFilm(pow(comp, vec3(2.2))), vec3(1.0/2.2)); // insane saturation o.O
 	//_out_color = pow(tonemapACESFilm(comp), vec3(1.0/2.2)); // looks just wrong
+
+	// noise dither for 8bit displays
+	_out_color += (hash32(gl_FragCoord.xy) * vec3(2.0) - vec3(1.0)) / vec3(255.0);
 })")
 }
 

framework/opengl_renderer/src/mm/opengl/render_tasks/fast_sky_render_task.cpp

@@ -47,7 +47,6 @@ FastSky::FastSky(MM::Engine& engine) {
 
 	_vertexBuffer->unbind(GL_ARRAY_BUFFER);
 	_vao->unbind();
-
 }
 
 FastSky::~FastSky(void) {
@@ -56,6 +55,17 @@ FastSky::~FastSky(void) {
 void FastSky::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
 	ZoneScopedN("MM::OpenGL::RenderTasks::FastSky::render");
 
+	auto* ssi = engine.tryService<MM::Services::SceneServiceInterface>();
+	if (ssi == nullptr) {
+		return; // nothing to draw
+	}
+
+	auto& scene = ssi->getScene();
+
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	rs.targets[target_fbo]->bind(MM::OpenGL::FrameBufferObject::W);
 
 	glEnable(GL_DEPTH_TEST);
@@ -67,9 +77,8 @@ void FastSky::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
 	_vertexBuffer->bind(GL_ARRAY_BUFFER);
 	_vao->bind();
 
-	auto& scene = engine.tryService<MM::Services::SceneServiceInterface>()->getScene();
 	{
-		auto& cam = scene.ctx<MM::OpenGL::Camera3D>();
+		auto& cam = scene.ctx().at<MM::OpenGL::Camera3D>();
 		MM::OpenGL::Camera3D tmp_cam = cam;
 		// create cam with y up, bc shader says so
 		tmp_cam.up = {0, 1, 0};
@@ -80,9 +89,13 @@ void FastSky::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
 	}
 
 	{
-		auto* ctx_ptr =  scene.try_ctx<FastSkyContext>();
+		//auto* ctx_ptr =  scene.try_ctx<FastSkyContext>();
-		if (!ctx_ptr) {
+		//if (!ctx_ptr) {
-			ctx_ptr = &_default_context;
+			//ctx_ptr = &_default_context;
+		//}
+		auto* ctx_ptr = &_default_context;
+		if (scene.ctx().contains<FastSkyContext>()) {
+			ctx_ptr = &scene.ctx().at<FastSkyContext>();
 		}
 
 		_shader->setUniform1f("time", ctx_ptr->time);

framework/opengl_renderer/src/mm/opengl/render_tasks/lite_particles2d.cpp

@@ -0,0 +1,785 @@
+#include "./lite_particles2d.hpp"
+
+#include <mm/opengl/shader.hpp>
+#include <mm/opengl/shader_builder.hpp>
+#include <mm/opengl/buffer.hpp>
+#include <mm/opengl/instance_buffer.hpp>
+#include <mm/opengl/vertex_array_object.hpp>
+
+#include <mm/fs_const_archiver.hpp>
+
+#include <mm/services/scene_service_interface.hpp>
+#include <entt/entity/registry.hpp>
+#include <mm/components/time_delta.hpp>
+#include <mm/opengl/camera_3d.hpp>
+
+#include "../components/lite_particles2d.hpp"
+
+#include <mm/resource_manager.hpp>
+#include "../lite_particles2d_type.hpp"
+#include <mm/opengl/texture.hpp>
+#include <mm/opengl/texture_loader.hpp>
+
+#include <glm/common.hpp>
+
+#include <tracy/Tracy.hpp>
+#ifndef MM_OPENGL_3_GLES
+	#include <tracy/TracyOpenGL.hpp>
+#else
+	#define TracyGpuContext
+	#define TracyGpuCollect
+	#define TracyGpuZone(...)
+#endif
+
+#include <mm/logger.hpp>
+
+#include <vector>
+
+namespace MM::OpenGL::RenderTasks {
+
+// this was glsl code
+// TODO: refactor this
+// packing helper
+static uint16_t pack_float_16bit(const float a, const float pack_mult) {
+	uint32_t a_bits = uint32_t(abs(a*pack_mult));
+	return (a_bits & 0x7fffu) | (uint16_t(a>=0.0 ? 0u : 1u) << 15u);
+}
+
+const float pack_vel_multiplier = 1000.0;
+
+static float pack_vel(const glm::vec2 vel) {
+	// ez just mult and save as shorts
+	return glm::uintBitsToFloat(
+		(pack_float_16bit(vel.x, pack_vel_multiplier) << 16u)
+		| pack_float_16bit(vel.y, pack_vel_multiplier)
+	);
+}
+
+const float pack_age_multiplier = 10000.0;
+
+static float pack_age_type(const float age, const uint16_t type) {
+	return glm::uintBitsToFloat((pack_float_16bit(age, pack_age_multiplier) << 16u) | (type & 0xffffu));
+}
+
+LiteParticles2D::LiteParticles2D(Engine& engine) {
+	_particles_0_buffers[0] = std::make_unique<InstanceBuffer<glm::vec4>>();
+	_particles_0_buffers[1] = std::make_unique<InstanceBuffer<glm::vec4>>();
+
+	resetBuffers();
+
+	_tf_vao[0] = std::make_unique<VertexArrayObject>();
+	_tf_vao[1] = std::make_unique<VertexArrayObject>();
+
+	auto setup_tf_vao = [this](size_t i) {
+		_tf_vao[i]->bind();
+		_particles_0_buffers[i]->bind();
+		glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
+		_particles_0_buffers[i]->unbind();
+
+		glEnableVertexAttribArray(0);
+
+		_tf_vao[i]->unbind();
+	};
+
+	setup_tf_vao(0);
+	setup_tf_vao(1);
+
+
+	// rendering
+
+	_render_vao[0] = std::make_unique<VertexArrayObject>();
+	_render_vao[1] = std::make_unique<VertexArrayObject>();
+
+	auto setup_rend_vao = [this](size_t i) {
+		size_t next_index = i == 0 ? 1 : 0;
+
+		_render_vao[i]->bind();
+		// bc we computed into the other one 0->1
+		_particles_0_buffers[next_index]->bind();
+		glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
+		_particles_0_buffers[next_index]->unbind();
+
+		glEnableVertexAttribArray(0);
+
+		_render_vao[i]->unbind();
+	};
+
+	setup_rend_vao(0);
+	setup_rend_vao(1);
+
+	resetTypeBuffers();
+
+	setupShaderFiles();
+
+	_tf_shader = ShaderBuilder::start()
+		.addStageVertexF(engine, vertexPathTF)
+		.addTransformFeedbackVarying("_out_0")
+		.addStageFragmentF(engine, fragmentPathTF) // empty stage
+		.finish();
+	assert(static_cast<bool>(_tf_shader));
+
+	_points_shader = ShaderBuilder::start()
+		.addStageVertexF(engine, vertexPathPoints)
+		.addStageFragmentF(engine, fragmentPathPoints)
+		.finish();
+	assert(static_cast<bool>(_points_shader));
+
+	_last_time = clock::now();
+}
+
+LiteParticles2D::~LiteParticles2D(void) {
+}
+
+void LiteParticles2D::uploadParticles(Services::OpenGLRenderer&, Scene& scene) {
+	ZoneScopedN("MM::OpenGL::RenderTasks::LiteParticles2D::uploadParticles");
+
+	if (!scene.ctx().contains<Components::LiteParticles2DUploadQueue>()) {
+		// TODO: warn?
+		return; // nothing to upload
+	}
+
+	auto& queue = scene.ctx().at<Components::LiteParticles2DUploadQueue>();
+
+	while (!queue.queue.empty()) {
+		// get range
+		auto range_size = queue.queue.size();
+		size_t range_first = _particle_buffer_next_index;
+		if (_particle_buffer_next_index + (range_size - 1) >= _particle_buffer_size) { // wrap
+			range_size = _particle_buffer_size - range_first;
+		}
+
+		//std::cerr << "s:" << range_size << " f:" << range_first << "\n";
+
+		//assert(range_first <= range_last);
+		assert(range_size >= 1);
+
+		size_t curr_buff_index = first_particles_buffer ? 0 : 1;
+
+#ifdef MM_OPENGL_3_GLES
+		// i think invalidating the whole buffer, instead of only the range results in undefined behaviour, but webgl wont let me otherwise and it seems to work
+		const auto gl_access = GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT;
+#else
+		// turns out, amd desktop opengl drivers dont like invalidate buffer (everyone else seems to be ok)
+		const auto gl_access = GL_MAP_WRITE_BIT;
+#endif
+
+		auto* data_0 = _particles_0_buffers[curr_buff_index]->mapRange(range_first, range_size, gl_access);
+
+		for (size_t i = 0; i < range_size; i++) {
+			auto& p = queue.queue.front();
+
+			uint16_t type = 0u;
+			if (_type_map.count(p.type_id)) {
+				type = _type_map.at(p.type_id);
+			} else {
+				SPDLOG_ERROR("unknown type {}, defaulting to zero.", p.type_id);
+			}
+
+			data_0[i] = glm::vec4(
+				p.pos.x, p.pos.y,
+				pack_vel(p.vel),
+				pack_age_type(p.age, type)
+			);
+
+			queue.queue.pop();
+		}
+
+		_particles_0_buffers[curr_buff_index]->unmap();
+
+		_particle_buffer_next_index = (range_first + range_size) % (_particle_buffer_size);
+	}
+}
+
+void LiteParticles2D::computeParticles(Services::OpenGLRenderer&, Scene& scene) {
+	ZoneScopedN("MM::OpenGL::RenderTasks::LiteParticles2D::computeParticles");
+	using namespace entt::literals;
+	_tf_shader->bind();
+
+	{ // time
+		auto newNow = clock::now();
+		std::chrono::duration<double, std::ratio<1, 1>> deltaTime = newNow - _last_time;
+		_last_time = newNow;
+
+		float time_delta = deltaTime.count() * scene.ctx().at<MM::Components::TimeDelta>().deltaFactor;
+		_time += time_delta;
+		_tf_shader->setUniform1f("_time_delta", time_delta);
+		_tf_shader->setUniform1f("_time", _time);
+	}
+
+	auto& rm_t = MM::ResourceManager<Texture>::ref();
+	rm_t.get("MM::LiteParticles2DTypes::Compute"_hs)->bind(0);
+
+	//_tf_shader->setUniform3f("_env_vec", env_vec * env_force);
+	//_tf_shader->setUniform1f("_noise_force", noise_force);
+	//_tf_shader->setUniform1f("_dampening", dampening);
+
+	const size_t curr_index = first_particles_buffer ? 0 : 1;
+	const size_t next_index = first_particles_buffer ? 1 : 0;
+
+	// bind in particles
+	_tf_vao[curr_index]->bind();
+
+	// bind out particles
+	// the order is the same as given to the ShaderBuilder
+	_particles_0_buffers[next_index]->bindBase(0);
+
+	glEnable(GL_RASTERIZER_DISCARD); // compute only rn
+
+	glBeginTransformFeedback(GL_POINTS);
+	glDrawArrays(GL_POINTS, 0, _particle_buffer_size);
+	glEndTransformFeedback();
+
+	glDisable(GL_RASTERIZER_DISCARD);
+
+	// TODO: move this
+	glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, 0);
+	//glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 1, 0);
+
+	_tf_vao[curr_index]->unbind();
+	_tf_shader->unbind();
+
+	// TODO: do i need this??
+	glFlush();
+
+	first_particles_buffer = !first_particles_buffer;
+}
+
+void LiteParticles2D::renderParticles(Services::OpenGLRenderer& rs, Scene& scene) {
+	using namespace entt::literals;
+	ZoneScopedN("MM::OpenGL::RenderTasks::LiteParticles2D::renderParticles");
+
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
+	//glDisable(GL_DEPTH_TEST);
+	glDisable(GL_BLEND);
+	glEnable(GL_DEPTH_TEST);
+	glDepthMask(GL_FALSE); // dont write to depth
+	//glEnable(GL_BLEND);
+
+#ifndef MM_OPENGL_3_GLES
+	glEnable(GL_PROGRAM_POINT_SIZE);
+#endif
+
+	rs.targets[target_fbo]->bind(FrameBufferObject::RW);
+
+	_points_shader->bind();
+
+	auto& rm_t = MM::ResourceManager<Texture>::ref();
+	rm_t.get("MM::LiteParticles2DTypes::Render"_hs)->bind(0);
+
+	Camera3D& cam = scene.ctx().at<Camera3D>();
+	_points_shader->setUniformMat4f("_vp", cam.getViewProjection());
+
+	GLint view_port[4];
+	glGetIntegerv(GL_VIEWPORT, view_port);
+
+	// width
+	_points_shader->setUniform1f("_point_size", view_port[2]/cam.horizontalViewPortSize);
+
+	const size_t curr_index = first_particles_buffer; // 0->1 / 1->0 bc compute phase also switches
+	_render_vao[curr_index]->bind();
+
+	glDrawArrays(GL_POINTS, 0, _particle_buffer_size);
+
+	_render_vao[curr_index]->unbind();
+	_points_shader->unbind();
+
+	glDepthMask(GL_TRUE);
+}
+
+void LiteParticles2D::render(Services::OpenGLRenderer& rs, Engine& engine) {
+	ZoneScopedN("MM::OpenGL::RenderTasks::LiteParticles2D::render");
+
+	auto* scene_service = engine.tryService<MM::Services::SceneServiceInterface>();
+	if (scene_service == nullptr) {
+		return;
+	}
+
+	Scene& scene = scene_service->getScene();
+
+	uploadParticles(rs, scene);
+	computeParticles(rs, scene);
+	renderParticles(rs, scene);
+}
+
+void LiteParticles2D::setParticleBufferSize(uint32_t new_buffer_size) {
+	_particle_buffer_size = new_buffer_size;
+
+	resetBuffers();
+}
+
+void LiteParticles2D::resetBuffers(void) {
+	const auto gl_buffer_type = GL_DYNAMIC_COPY;
+	auto reset_buffer_0 = [this](size_t i) {
+		auto* data = _particles_0_buffers[i]->map(_particle_buffer_size, gl_buffer_type);
+		for (size_t x = 0; x < _particle_buffer_size; x++) {
+			data[x] = glm::vec4{
+				0.f, 0.f, // pos
+				0, // vel (pack, but 0 should mean 0)
+				pack_age_type(2.f, 0)
+			};
+		}
+		_particles_0_buffers[i]->unmap();
+	};
+
+	reset_buffer_0(0);
+	reset_buffer_0(1);
+
+	_particle_buffer_next_index = 0; // only matters if resize
+}
+
+void LiteParticles2D::resetTypeBuffers(void) {
+	using namespace entt::literals;
+
+	// clear
+	_type_map.clear();
+
+	// build data
+	std::vector<float> type_compute_upload_buffer {};
+	std::vector<float> type_render_upload_buffer {};
+
+	// TODO: replace with "default"
+	{ // 0
+		// TODO: propper 0 particle
+		LiteParticles2DType {
+			{
+				0.04f, //age_delta;
+
+				{0.f, 0.f}, //force_vec
+
+				5.f, //turbulence;
+				0.1f, //turbulence_noise_scale;
+				0.01f, //turbulence_individuality;
+				0.5f, //turbulence_time_scale;
+
+				1.0f, //dampening;
+			},
+			{
+				{1.8f, 3.f, 6.f, 1.f}, //color_start;
+				{2.3f, 1.2f, 0.5f, 1.f}, //color_end;
+
+				0.1f, //size_start;
+				0.02f //size_end;
+			}
+		}.upload(type_compute_upload_buffer, type_render_upload_buffer);
+	}
+	// defaults
+	_type_map[0u] = 0u;
+	_type_map[""_hs] = 0u;
+	_type_map["0"_hs] = 0u;
+	_type_map["default"_hs] = 0u;
+
+	auto& rm_lpt = MM::ResourceManager<LiteParticles2DType>::ref();
+	uint16_t curr_idx = 1; // 0 is reserved for now :P
+	rm_lpt.each([this, &curr_idx, &type_compute_upload_buffer, &type_render_upload_buffer](const auto type_id, const auto& res) {
+		_type_map[type_id] = curr_idx++;
+		res->upload(type_compute_upload_buffer, type_render_upload_buffer);
+	});
+	SPDLOG_INFO("have {} LiteParticles2D types.", curr_idx);
+
+	// upload / create textures
+	// HACK: refactor loader
+	auto& rm_t = MM::ResourceManager<Texture>::ref();
+	{ // compute
+		auto r = rm_t.reload<MM::OpenGL::TextureLoaderEmpty>(
+			"MM::LiteParticles2DTypes::Compute",
+			GL_R32F,
+			LiteParticles2DType::Compute::_member_count, curr_idx,
+			GL_RED,
+			GL_FLOAT
+		);
+		assert(r);
+
+		// and re-"create"
+		rm_t.get("MM::LiteParticles2DTypes::Compute"_hs)->bind(0); // hack
+		glTexImage2D(
+			GL_TEXTURE_2D,
+			0,
+			GL_R32F,
+			LiteParticles2DType::Compute::_member_count, curr_idx,
+			0,
+			GL_RED,
+			GL_FLOAT,
+			type_compute_upload_buffer.data()
+		);
+		// just in case
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	}
+
+	{ // render
+		auto r = rm_t.reload<MM::OpenGL::TextureLoaderEmpty>(
+			"MM::LiteParticles2DTypes::Render",
+			GL_R32F,
+			LiteParticles2DType::Render::_member_count, curr_idx,
+			GL_RED,
+			GL_FLOAT
+		);
+		assert(r);
+
+		// and re-"create"
+		rm_t.get("MM::LiteParticles2DTypes::Render"_hs)->bind(0); // hack
+		glTexImage2D(
+			GL_TEXTURE_2D,
+			0,
+			GL_R32F,
+			LiteParticles2DType::Render::_member_count, curr_idx,
+			0,
+			GL_RED,
+			GL_FLOAT,
+			type_render_upload_buffer.data()
+		);
+		// just in case
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	}
+}
+
+void LiteParticles2D::setupShaderFiles(void) {
+	FS_CONST_MOUNT_FILE(commonPathTF,
+R"(
+
+#include "/shaders/builtin/noise.glsl"
+
+// variants, based on offset, might be faster
+vec2 var_noise22(vec2 x) {
+	return vec2(noise12(x), noise12(x + 13037.0));
+}
+vec2 var_noise23(vec3 x) {
+	return vec2(noise13(x), noise13(x + 13037.0));
+}
+vec2 var_noise24(vec4 x) {
+	return vec2(noise14(x), noise14(x + 13037.0));
+}
+
+// packing helper
+uint pack_float_16bit(in float a, in float pack_mult) {
+	uint a_bits = uint(abs(a*pack_mult));
+
+	return (a_bits & 0x7fffu) | (uint(a>=0.0 ? 0u : 1u) << 15u);
+}
+
+float unpack_float_16bit(in uint a, in float pack_mult) {
+	return (float(a & 0x7fffu) / pack_mult) * ((a >> 15u) != 0u ? -1.0 : 1.0);
+}
+
+const float pack_vel_multiplier = 1000.0;
+
+float pack_vel(in vec2 vel) {
+	return uintBitsToFloat(
+		(pack_float_16bit(vel.x, pack_vel_multiplier) << 16u)
+		| pack_float_16bit(vel.y, pack_vel_multiplier)
+	);
+}
+
+vec2 unpack_vel(in float pack) {
+	uint pack_bits = floatBitsToUint(pack);
+	return vec2(
+		unpack_float_16bit(pack_bits >> 16u, pack_vel_multiplier),
+		unpack_float_16bit(pack_bits & 0xffffu, pack_vel_multiplier)
+	);
+}
+
+const float pack_age_multiplier = 10000.0;
+
+float pack_age_type(in float age, in uint type) {
+	return uintBitsToFloat(
+		(pack_float_16bit(age, pack_age_multiplier) << 16u)
+		| (type & 0xffffu)
+	);
+}
+
+)")
+	FS_CONST_MOUNT_FILE(vertexPathTF,
+GLSL_VERSION_STRING
+R"(
+#ifdef GL_ES
+	precision highp float;
+	precision highp int;
+#endif
+
+#include "./common.glsl"
+
+uniform float _time_delta;
+uniform float _time;
+
+uniform sampler2D _type_buffer;
+
+layout(location = 0) in vec4 _in_0;
+
+out vec4 _out_0;
+
+void set_out(in vec2 pos, in vec2 vel, in float age, in uint type) {
+	_out_0 = vec4(
+		pos.x, pos.y,
+		pack_vel(vel),
+		pack_age_type(age, type)
+	);
+}
+
+void get_in(out vec2 pos, out vec2 vel, out float age, out uint type) {
+	pos = _in_0.xy;
+	vel = unpack_vel(_in_0.z);
+
+	uint age_type_bits = floatBitsToUint(_in_0.w);
+	age = unpack_float_16bit(age_type_bits >> 16u, pack_age_multiplier);
+	type = age_type_bits & 0xffffu;
+}
+
+struct sim_config_type {
+	highp float age_delta;
+
+	//highp float gravity;
+	vec2 force_vec;
+
+	highp float turbulence;
+	highp float turbulence_noise_scale;
+	highp float turbulence_individuality;
+	highp float turbulence_time_scale;
+
+	highp float dampening;
+};
+
+vec2 fetch_vec2(in uint offset, in uint type) {
+	return vec2(
+		texelFetch(_type_buffer, ivec2(offset+0u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(offset+1u, type), 0).r
+	);
+}
+
+sim_config_type fetch_type_config(uint type) {
+	return sim_config_type(
+		texelFetch(_type_buffer, ivec2(0u, type), 0).r,
+		fetch_vec2(1u, type),
+		texelFetch(_type_buffer, ivec2(3u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(4u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(5u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(6u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(7u, type), 0).r
+	);
+}
+
+vec2 calc_turbulence_vec(
+	in vec2 pos,
+	in float turbulence,
+	in float turbulence_noise_scale,
+	in float turbulence_individuality,
+	in float turbulence_time_scale
+) {
+	vec2 turbulence_vec =
+		(
+			noise24(vec4(
+				pos * turbulence_noise_scale,
+				float(gl_VertexID & 0x0fff) * turbulence_individuality,
+				_time * turbulence_time_scale
+			))
+			- vec2(0.5)
+		)
+		* 2.0
+		* turbulence
+	;
+
+	return turbulence_vec;
+}
+
+void calc_particle_sim(
+// inout (particle mem)
+	inout vec2 pos,
+	inout vec2 vel,
+
+	inout float age,
+	inout uint type,
+
+// type specific config
+	in sim_config_type conf
+) {
+	vec2 turbulence_vec = calc_turbulence_vec(
+		pos,
+		conf.turbulence,
+		conf.turbulence_noise_scale,
+		conf.turbulence_individuality,
+		conf.turbulence_time_scale
+	);
+
+	vel = (vel + (
+		turbulence_vec +
+		//vec2(0.0, -10.0) * conf.gravity
+		conf.force_vec
+	) * _time_delta);
+
+	// TODO: this does not behave correctly
+	// TODO: experiment with formula
+	vel = mix(vel, vec2(0.0), conf.dampening * _time_delta);
+
+	pos = pos + (vel * _time_delta);
+
+	age = min(age + (conf.age_delta * _time_delta), 2.0);
+}
+
+void main() {
+	vec2 pos;
+	vec2 vel;
+	float age;
+	uint type;
+	get_in(pos, vel, age, type);
+
+	sim_config_type conf = fetch_type_config(type);
+
+	calc_particle_sim(
+		pos,
+		vel,
+		age,
+		type,
+
+		conf
+	);
+
+	set_out(pos, vel, age, type);
+})")
+
+	FS_CONST_MOUNT_FILE(fragmentPathTF,
+GLSL_VERSION_STRING
+R"(
+#ifdef GL_ES
+	precision mediump float;
+#endif
+
+// i am never executed
+
+out vec4 _out_color;
+
+void main() {
+	_out_color = vec4(1.0);
+})")
+
+	FS_CONST_MOUNT_FILE(vertexPathPoints,
+GLSL_VERSION_STRING
+R"(
+#ifdef GL_ES
+	precision highp float;
+	precision highp int;
+#endif
+
+#include "./common.glsl"
+
+uniform mat4 _vp;
+uniform float _point_size;
+
+uniform sampler2D _type_buffer;
+
+layout(location = 0) in vec4 _in_0;
+
+void get_in(out vec2 pos, out vec2 vel, out float age, out uint type) {
+	pos = _in_0.xy;
+	vel = unpack_vel(_in_0.z);
+
+	uint age_type_bits = floatBitsToUint(_in_0.w);
+	age = unpack_float_16bit(age_type_bits >> 16u, pack_age_multiplier);
+	type = age_type_bits & 0xffffu;
+}
+
+out vec4 _frag_color;
+flat out int _vertex_id;
+
+struct config_type {
+	highp vec4 color_start;
+	highp vec4 color_end;
+
+	highp float size_start;
+	highp float size_end;
+};
+
+vec4 fetch_vec4(in uint offset, in uint type) {
+	return vec4(
+		texelFetch(_type_buffer, ivec2(offset+0u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(offset+1u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(offset+2u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(offset+3u, type), 0).r
+	);
+}
+
+config_type fetch_config_type(uint type) {
+	return config_type(
+		fetch_vec4(0u, type),
+		fetch_vec4(4u, type),
+		texelFetch(_type_buffer, ivec2(8u, type), 0).r,
+		texelFetch(_type_buffer, ivec2(9u, type), 0).r
+	);
+}
+
+void main() {
+	vec2 in_pos;
+	vec2 in_vel;
+
+	float in_age;
+	uint in_type;
+
+	get_in(in_pos, in_vel, in_age, in_type);
+
+	// skip dead
+	if (in_age > 1.0) {
+		_frag_color = vec4(1.0, 0.0, 1.0, 0.0); // so it does not get rendered (alpha)
+		gl_Position.z = 100000000000.0; // clip (does not allways work <.<)
+		// gl_PointSize = 0.0; // ub
+		return;
+	}
+
+	config_type conf = fetch_config_type(in_type);
+
+	//_frag_color = mix(conf.color_start, conf.color_end, in_age);
+	_frag_color = mix(conf.color_start, conf.color_end, smoothstep(0.0, 1.0, in_age));
+
+	gl_Position = _vp * vec4(in_pos, 0.0, 1.0);
+
+	// TODO: fix before merge
+	gl_Position.z = -1.0; // hack for ortho ??
+
+	gl_PointSize = max(mix(conf.size_start, conf.size_end, in_age) * _point_size, 1.0);
+
+	_vertex_id = gl_VertexID;
+})")
+
+	FS_CONST_MOUNT_FILE(fragmentPathPoints,
+GLSL_VERSION_STRING
+R"(
+#ifdef GL_ES
+	precision mediump float;
+#endif
+
+in vec4 _frag_color;
+flat in int _vertex_id;
+
+out vec4 _out_color;
+
+bool should_discard(vec2 screen_pos, float alpha) {
+	const int dither[8 * 8] = int[8 * 8](
+		 0, 32,  8, 40,  2, 34, 10, 42,
+		48, 16, 56, 24, 50, 18, 58, 26,
+		12, 44,  4, 36, 14, 46,  6, 38,
+		60, 28, 52, 20, 62, 30, 54, 22,
+		 3, 35, 11, 43,  1, 33,  9, 41,
+		51, 19, 59, 27, 49, 17, 57, 25,
+		15, 47,  7, 39, 13, 45,  5, 37,
+		63, 31, 55, 23, 61, 29, 53, 21
+	);
+
+	int mat_value = dither[int(screen_pos.x)%8 + 8 * (int(screen_pos.y)%8)];
+	float n_mat_value = float(mat_value) * (1.0/64.0);
+
+	return n_mat_value < 1.0 - alpha;
+}
+
+void main() {
+	if (should_discard(vec2(gl_FragCoord.x + float(_vertex_id%8), gl_FragCoord.y + float(_vertex_id%7)), _frag_color.a)) {
+		discard;
+	}
+
+	_out_color = vec4(_frag_color.rgb, 1.0);
+})")
+
+}
+
+} // MM::OpenGL::RenderTasks
+

framework/opengl_renderer/src/mm/opengl/render_tasks/lite_particles2d.hpp

@@ -0,0 +1,83 @@
+#pragma once
+
+#include <mm/opengl/render_task.hpp>
+#include <mm/services/opengl_renderer.hpp>
+
+#include <glm/fwd.hpp>
+
+// TODO: make the renderer provide a time delta
+#include <chrono>
+#include <string>
+#include <unordered_map>
+
+// fwd
+namespace MM::OpenGL {
+	class Shader;
+	class Buffer;
+	class VertexArrayObject;
+
+	template<typename TInstance>
+	class InstanceBuffer;
+}
+
+namespace MM::OpenGL::RenderTasks {
+
+	class LiteParticles2D : public RenderTask {
+		private:
+			std::shared_ptr<Shader> _tf_shader;
+			std::shared_ptr<Shader> _points_shader;
+
+			std::unordered_map<uint32_t, uint16_t> _type_map {}; // maps id to "index" in type texture
+
+			// double buffered
+			bool first_particles_buffer {true};
+			std::unique_ptr<VertexArrayObject> _tf_vao[2];
+			std::unique_ptr<VertexArrayObject> _render_vao[2];
+
+			// vec2 pos (2 floats)
+			// half vec2 vel (1 float)
+			// fixedpoint age + uint16 type (1 float)
+			std::unique_ptr<MM::OpenGL::InstanceBuffer<glm::vec4>> _particles_0_buffers[2];
+
+			uint32_t _particle_buffer_size {10'000};
+			size_t _particle_buffer_next_index {0};
+
+			using clock = std::chrono::high_resolution_clock;
+			std::chrono::time_point<clock> _last_time;
+			float _time {0};
+
+		public:
+			// TODO: impl some environment controlled force
+			//glm::vec2 env_vec{0, 1};
+
+			LiteParticles2D(Engine& engine);
+			~LiteParticles2D(void);
+
+			const char* name(void) override { return "LiteParticles2D"; }
+
+			void uploadParticles(Services::OpenGLRenderer& rs, Scene& scene);
+			void computeParticles(Services::OpenGLRenderer& rs, Scene& scene);
+			void renderParticles(Services::OpenGLRenderer& rs, Scene& scene);
+			void render(Services::OpenGLRenderer& rs, Engine& engine) override;
+
+			void setParticleBufferSize(uint32_t new_buffer_size = 10'000);
+			void resetBuffers(void);
+			void resetTypeBuffers(void);
+
+		public:
+			const char* commonPathTF {"shader/lite_particles2d/common.glsl"};
+
+			const char* vertexPathTF {"shader/lite_particles2d/tf_vert.glsl"};
+			const char* fragmentPathTF {"shader/lite_particles2d/tf_frag.glsl"}; // "empty" bc of webgl (es)
+
+			const char* vertexPathPoints {"shader/lite_particles2d/point_vert.glsl"};
+			const char* fragmentPathPoints {"shader/lite_particles2d/point_frag.glsl"};
+
+			std::string target_fbo {"display"};
+
+		private:
+			void setupShaderFiles(void);
+	};
+
+} // MM::OpenGL::RenderTasks
+

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_rect.cpp

@@ -22,9 +22,6 @@
 namespace MM::OpenGL::RenderTasks {
 
 SimpleRect::SimpleRect(Engine& engine) {
-	default_cam.setOrthographic();
-	default_cam.updateView();
-
 	float vertices[] = {
 		-0.5f, 0.5f,
 		-0.5f, -0.5f,
@@ -63,6 +60,10 @@ void SimpleRect::render(Services::OpenGLRenderer& rs, Engine& engine) {
 
 	auto& scene = ssi->getScene();
 
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	rs.targets[target_fbo]->bind(FrameBufferObject::RW);
 
 	glEnable(GL_DEPTH_TEST);
@@ -71,12 +72,8 @@ void SimpleRect::render(Services::OpenGLRenderer& rs, Engine& engine) {
 	_shader->bind();
 	_vao->bind();
 
-	Camera3D* cam = scene.try_ctx<Camera3D>();
+	Camera3D& cam = scene.ctx().at<Camera3D>();
-	if (!cam) {
+	auto vp = cam.getViewProjection();
-		cam = &default_cam;
-	}
-
-	auto vp = cam->getViewProjection();
 
 	scene.view<const Components::Transform4x4>().each([this, &scene, &vp](entt::entity e, const auto& t) {
 		_shader->setUniformMat4f("_WVP", vp * t.trans);

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_rect.hpp

@@ -5,7 +5,6 @@
 
 #include <mm/opengl/camera_3d.hpp>
 
-//#include <glm/fwd.hpp>
 #include <glm/vec4.hpp>
 
 // fwd
@@ -26,8 +25,6 @@ namespace MM::OpenGL::RenderTasks {
 		public:
 			glm::vec4 default_color {1,1,1,1};
 
-			Camera3D default_cam;
-
 			SimpleRect(Engine& engine);
 			~SimpleRect(void);
 

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_sprite.cpp

@@ -28,9 +28,6 @@
 namespace MM::OpenGL::RenderTasks {
 
 SimpleSprite::SimpleSprite(Engine& engine) {
-	default_cam.setOrthographic();
-	default_cam.updateView();
-
 	float vertices[] = {
 		-0.5f, 0.5f,
 		-0.5f, -0.5f,
@@ -69,6 +66,10 @@ void SimpleSprite::render(Services::OpenGLRenderer& rs, Engine& engine) {
 
 	auto& scene = ssi->getScene();
 
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	rs.targets[target_fbo]->bind(FrameBufferObject::W);
 
 	glEnable(GL_DEPTH_TEST);
@@ -79,12 +80,8 @@ void SimpleSprite::render(Services::OpenGLRenderer& rs, Engine& engine) {
 	_vao->bind();
 
 
-	auto* cam = scene.try_ctx<Camera3D>();
+	Camera3D& cam = scene.ctx().at<Camera3D>();
-	if (!cam) {
+	auto vp = cam.getViewProjection();
-		cam = &default_cam;
-	}
-
-	auto vp = cam->getViewProjection();
 
 	scene.view<const Components::Transform4x4, Components::OpenGL::Texture>().each([this, &scene, &vp](entt::entity e, const auto& t, auto& tex) {
 		assert(tex.tex); // debug

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_sprite.hpp

@@ -26,8 +26,6 @@ namespace MM::OpenGL::RenderTasks {
 		public:
 			glm::vec4 default_color {1,1,1,1};
 
-			Camera3D default_cam;
-
 			SimpleSprite(Engine& engine);
 			~SimpleSprite(void);
 

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_spritesheet.cpp

@@ -30,9 +30,6 @@
 namespace MM::OpenGL::RenderTasks {
 
 SimpleSpriteSheet::SimpleSpriteSheet(Engine& engine) {
-	default_cam.setOrthographic();
-	default_cam.updateView();
-
 	float vertices[] = {
 		-0.5f, 0.5f,
 		-0.5f, -0.5f,
@@ -56,11 +53,6 @@ SimpleSpriteSheet::SimpleSpriteSheet(Engine& engine) {
 	setupShaderFiles();
 	_shader = Shader::createF(engine, vertexPath, fragmentPath);
 	assert(_shader != nullptr);
-
-	auto& scene = engine.tryService<MM::Services::SceneServiceInterface>()->getScene();
-	if (!scene.try_ctx<Camera3D>()) {
-		LOG_SSSR("warn: scene has no Camera!");
-	}
 }
 
 SimpleSpriteSheet::~SimpleSpriteSheet(void) {
@@ -76,6 +68,10 @@ void SimpleSpriteSheet::render(Services::OpenGLRenderer& rs, Engine& engine) {
 
 	auto& scene = ssi->getScene();
 
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	rs.targets[target_fbo]->bind(FrameBufferObject::W);
 
 	glEnable(GL_DEPTH_TEST);
@@ -85,12 +81,8 @@ void SimpleSpriteSheet::render(Services::OpenGLRenderer& rs, Engine& engine) {
 	_vertexBuffer->bind(GL_ARRAY_BUFFER);
 	_vao->bind();
 
-	auto* cam = scene.try_ctx<Camera3D>();
+	Camera3D& cam = scene.ctx().at<Camera3D>();
-	if (!cam) {
+	auto vp = cam.getViewProjection();
-		cam = &default_cam;
-	}
-
-	auto vp = cam->getViewProjection();
 
 	scene.view<const Components::Transform4x4, SpriteSheetRenderable>().each([this, &scene, &vp](entt::entity e, const auto& t, auto& spr) {
 		assert(spr.sp.tex); // debug

framework/opengl_renderer/src/mm/opengl/render_tasks/simple_spritesheet.hpp

@@ -26,8 +26,6 @@ namespace MM::OpenGL::RenderTasks {
 		public:
 			glm::vec4 default_color {1.f, 1.f, 1.f, 1.f};
 
-			Camera3D default_cam;
-
 			SimpleSpriteSheet(Engine& engine);
 			~SimpleSpriteSheet(void);
 

framework/opengl_renderer/src/mm/opengl/render_tasks/tilemap.cpp

@@ -75,6 +75,17 @@ Tilemap::~Tilemap(void) {
 void Tilemap::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
 	ZoneScopedN("MM::OpenGL::Renderers::TilemapRenderer::render");
 
+	auto* ssi = engine.tryService<MM::Services::SceneServiceInterface>();
+	if (ssi == nullptr) {
+		return; // nothing to draw
+	}
+
+	auto& scene = ssi->getScene();
+
+	if (!scene.ctx().contains<Camera3D>()) {
+		return; // nothing to draw
+	}
+
 	rs.targets[target_fbo]->bind(MM::OpenGL::FrameBufferObject::W);
 
 	glEnable(GL_DEPTH_TEST);
@@ -85,17 +96,13 @@ void Tilemap::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
 	_vertexBuffer->bind(GL_ARRAY_BUFFER);
 	_vao->bind();
 
-
+	MM::OpenGL::Camera3D& cam = scene.ctx().at<MM::OpenGL::Camera3D>();
-	auto& scene = engine.tryService<Services::SceneServiceInterface>()->getScene();
-
-	MM::OpenGL::Camera3D& cam = scene.ctx<MM::OpenGL::Camera3D>();
 	auto vp = cam.getViewProjection();
 
 	_shader->setUniform3f("_ambient_color", ambient_color);
 
 	scene.view<MM::Components::Transform4x4, OpenGL::TilemapRenderable>()
 		.each([&](auto, MM::Components::Transform4x4& t, OpenGL::TilemapRenderable& tilemap) {
-		//_shader->setUniformMat4f("_WVP", vp * t.getTransform4(tilemap.z + 500.f));
 		_shader->setUniformMat4f("_WVP", vp * t.trans);
 
 		// for each sprite layer

framework/opengl_renderer/src/mm/opengl/res/shaders_builtin.cpp

@@ -84,6 +84,312 @@ vec3 tonemapReinhard(vec3 x) {
 #endif
 )")
 	// ==================== tonemapping.glsl ==================== END
+
+	// ==================== hashing.glsl ==================== START
+	FS_CONST_MOUNT_FILE("/shaders/builtin/hashing.glsl",
+R"(
+#ifndef INCLUDE_BUILTIN_HASHING
+#define INCLUDE_BUILTIN_HASHING
+
+// https://www.shadertoy.com/view/4djSRW
+// Hash without Sine
+// MIT License...
+/* Copyright (c)2014 David Hoskins.
+   modified by Erik Scholz 2022
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.*/
+
+//----------------------------------------------------------------------------------------
+// 1 out, 1 in...
+float hash11(float p)
+{
+	p = fract(p * .1031);
+	p *= p + 33.33;
+	p *= p + p;
+	return fract(p);
+}
+
+//----------------------------------------------------------------------------------------
+// 1 out, 2 in...
+float hash12(vec2 p)
+{
+	vec3 p3  = fract(vec3(p.xyx) * .1031);
+	p3 += dot(p3, p3.yzx + 33.33);
+	return fract((p3.x + p3.y) * p3.z);
+}
+
+//----------------------------------------------------------------------------------------
+// 1 out, 3 in...
+float hash13(vec3 p3)
+{
+	p3  = fract(p3 * .1031);
+	p3 += dot(p3, p3.zyx + 31.32);
+	return fract((p3.x + p3.y) * p3.z);
+}
+
+//----------------------------------------------------------------------------------------
+// TODO: test properly
+// 1 out, 4 in...
+float hash14(vec4 p4)
+{
+	p4  = fract(p4 * .1031);
+	p4 += dot(p4, p4.zywx + 31.32);
+	return fract((p4.x + p4.y + p4.w) * p4.z);
+}
+
+//----------------------------------------------------------------------------------------
+// 2 out, 1 in...
+vec2 hash21(float p)
+{
+	vec3 p3 = fract(vec3(p) * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yzx + 33.33);
+	return fract((p3.xx+p3.yz)*p3.zy);
+}
+
+//----------------------------------------------------------------------------------------
+// 2 out, 2 in...
+vec2 hash22(vec2 p)
+{
+	vec3 p3 = fract(vec3(p.xyx) * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yzx+33.33);
+	return fract((p3.xx+p3.yz)*p3.zy);
+}
+
+//----------------------------------------------------------------------------------------
+// 2 out, 3 in...
+vec2 hash23(vec3 p3)
+{
+	p3 = fract(p3 * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yzx+33.33);
+	return fract((p3.xx+p3.yz)*p3.zy);
+}
+
+//----------------------------------------------------------------------------------------
+// TODO: test properly
+// 2 out, 4 in...
+vec2 hash24(vec4 p4)
+{
+	p4 = fract(p4 * vec4(.1031, .1030, .0973, .1337));
+	p4 += dot(p4, p4.ywzx+33.33);
+	return fract((p4.wx+p4.yz)*p4.zy);
+}
+
+//----------------------------------------------------------------------------------------
+// 3 out, 1 in...
+vec3 hash31(float p)
+{
+	vec3 p3 = fract(vec3(p) * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yzx+33.33);
+	return fract((p3.xxy+p3.yzz)*p3.zyx);
+}
+
+
+//----------------------------------------------------------------------------------------
+// 3 out, 2 in...
+vec3 hash32(vec2 p)
+{
+	vec3 p3 = fract(vec3(p.xyx) * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yxz+33.33);
+	return fract((p3.xxy+p3.yzz)*p3.zyx);
+}
+
+//----------------------------------------------------------------------------------------
+// 3 out, 3 in...
+vec3 hash33(vec3 p3)
+{
+	p3 = fract(p3 * vec3(.1031, .1030, .0973));
+	p3 += dot(p3, p3.yxz+33.33);
+	return fract((p3.xxy + p3.yxx)*p3.zyx);
+}
+
+//----------------------------------------------------------------------------------------
+// 4 out, 1 in...
+vec4 hash41(float p)
+{
+	vec4 p4 = fract(vec4(p) * vec4(.1031, .1030, .0973, .1099));
+	p4 += dot(p4, p4.wzxy+33.33);
+	return fract((p4.xxyz+p4.yzzw)*p4.zywx);
+}
+
+//----------------------------------------------------------------------------------------
+// 4 out, 2 in...
+vec4 hash42(vec2 p)
+{
+	vec4 p4 = fract(vec4(p.xyxy) * vec4(.1031, .1030, .0973, .1099));
+	p4 += dot(p4, p4.wzxy+33.33);
+	return fract((p4.xxyz+p4.yzzw)*p4.zywx);
+}
+
+//----------------------------------------------------------------------------------------
+// 4 out, 3 in...
+vec4 hash43(vec3 p)
+{
+	vec4 p4 = fract(vec4(p.xyzx)  * vec4(.1031, .1030, .0973, .1099));
+	p4 += dot(p4, p4.wzxy+33.33);
+	return fract((p4.xxyz+p4.yzzw)*p4.zywx);
+}
+
+//----------------------------------------------------------------------------------------
+// 4 out, 4 in...
+vec4 hash44(vec4 p4)
+{
+	p4 = fract(p4  * vec4(.1031, .1030, .0973, .1099));
+	p4 += dot(p4, p4.wzxy+33.33);
+	return fract((p4.xxyz+p4.yzzw)*p4.zywx);
+}
+
+#endif
+)")
+	// ==================== hashing.glsl ==================== END
+
+	// ==================== noise.glsl ==================== START
+	FS_CONST_MOUNT_FILE("/shaders/builtin/noise.glsl",
+R"(
+#ifndef INCLUDE_BUILTIN_NOISE
+#define INCLUDE_BUILTIN_NOISE
+
+#include "/shaders/builtin/hashing.glsl"
+
+// value noise based on Inigo Quilez value noise shaders.
+// https://www.youtube.com/c/InigoQuilez
+// https://iquilezles.org/
+// value noise 2d: https://www.shadertoy.com/view/lsf3WH
+// value noise 3d: https://www.shadertoy.com/view/4sfGzS
+
+float noise12(in vec2 p) {
+	vec2 i = floor(p);
+	vec2 f = fract(p);
+	vec2 u = f * f * (3.0 - 2.0 * f);
+
+	return mix(mix(	hash12(i + vec2(0.0, 0.0)),
+					hash12(i + vec2(1.0, 0.0)), u.x),
+				mix(hash12(i + vec2(0.0, 1.0)),
+					hash12(i + vec2(1.0, 1.0)), u.x), u.y);
+}
+
+vec2 noise22(in vec2 p) {
+	vec2 i = floor(p);
+	vec2 f = fract(p);
+	vec2 u = f * f * (3.0 - 2.0 * f);
+
+	return mix(mix(	hash22(i + vec2(0.0, 0.0)),
+					hash22(i + vec2(1.0, 0.0)), u.x),
+				mix(hash22(i + vec2(0.0, 1.0)),
+					hash22(i + vec2(1.0, 1.0)), u.x), u.y);
+}
+
+float noise13(in vec3 x) {
+	vec3 i = floor(x);
+	vec3 f = fract(x);
+	vec3 u  = f * f * (3.0 - 2.0 * f);
+
+	return mix(mix(mix(	hash13(i + vec3(0.0, 0.0, 0.0)),
+						hash13(i + vec3(1.0, 0.0, 0.0)), u.x),
+					mix(hash13(i + vec3(0.0, 1.0, 0.0)),
+						hash13(i + vec3(1.0, 1.0, 0.0)), u.x), u.y),
+				mix(mix(hash13(i + vec3(0.0, 0.0, 1.0)),
+						hash13(i + vec3(1.0, 0.0, 1.0)), u.x),
+					mix(hash13(i + vec3(0.0, 1.0, 1.0)),
+						hash13(i + vec3(1.0, 1.0, 1.0)), u.x), u.y), u.z);
+}
+
+float noise14(in vec4 x) {
+	vec4 i = floor(x);
+	vec4 f = fract(x);
+	vec4 u = f * f * (3.0 - 2.0 * f);
+
+	return
+		mix(mix(mix(mix(hash14(i + vec4(0.0, 0.0, 0.0, 0.0)),
+						hash14(i + vec4(1.0, 0.0, 0.0, 0.0)), u.x
+					),
+					mix(hash14(i + vec4(0.0, 1.0, 0.0, 0.0)),
+						hash14(i + vec4(1.0, 1.0, 0.0, 0.0)), u.x
+					), u.y
+				),
+				mix(mix(hash14(i + vec4(0.0, 0.0, 1.0, 0.0)),
+						hash14(i + vec4(1.0, 0.0, 1.0, 0.0)), u.x
+					),
+					mix(hash14(i + vec4(0.0, 1.0, 1.0, 0.0)),
+						hash14(i + vec4(1.0, 1.0, 1.0, 0.0)), u.x
+					), u.y
+				), u.z
+			),
+			mix(mix(mix(hash14(i + vec4(0.0, 0.0, 0.0, 1.0)),
+						hash14(i + vec4(1.0, 0.0, 0.0, 1.0)), u.x
+					),
+					mix(hash14(i + vec4(0.0, 1.0, 0.0, 1.0)),
+						hash14(i + vec4(1.0, 1.0, 0.0, 1.0)), u.x
+					), u.y
+				),
+				mix(mix(hash14(i + vec4(0.0, 0.0, 1.0, 1.0)),
+						hash14(i + vec4(1.0, 0.0, 1.0, 1.0)), u.x
+					),
+					mix(hash14(i + vec4(0.0, 1.0, 1.0, 1.0)),
+						hash14(i + vec4(1.0, 1.0, 1.0, 1.0)), u.x
+					), u.y
+				), u.z
+			), u.w
+		);
+}
+
+vec2 noise24(in vec4 x) {
+	vec4 i = floor(x);
+	vec4 f = fract(x);
+	vec4 u = f * f * (3.0 - 2.0 * f);
+
+	return
+		mix(mix(mix(mix(hash24(i + vec4(0.0, 0.0, 0.0, 0.0)),
+						hash24(i + vec4(1.0, 0.0, 0.0, 0.0)), u.x
+					),
+					mix(hash24(i + vec4(0.0, 1.0, 0.0, 0.0)),
+						hash24(i + vec4(1.0, 1.0, 0.0, 0.0)), u.x
+					), u.y
+				),
+				mix(mix(hash24(i + vec4(0.0, 0.0, 1.0, 0.0)),
+						hash24(i + vec4(1.0, 0.0, 1.0, 0.0)), u.x
+					),
+					mix(hash24(i + vec4(0.0, 1.0, 1.0, 0.0)),
+						hash24(i + vec4(1.0, 1.0, 1.0, 0.0)), u.x
+					), u.y
+				), u.z
+			),
+			mix(mix(mix(hash24(i + vec4(0.0, 0.0, 0.0, 1.0)),
+						hash24(i + vec4(1.0, 0.0, 0.0, 1.0)), u.x
+					),
+					mix(hash24(i + vec4(0.0, 1.0, 0.0, 1.0)),
+						hash24(i + vec4(1.0, 1.0, 0.0, 1.0)), u.x
+					), u.y
+				),
+				mix(mix(hash24(i + vec4(0.0, 0.0, 1.0, 1.0)),
+						hash24(i + vec4(1.0, 0.0, 1.0, 1.0)), u.x
+					),
+					mix(hash24(i + vec4(0.0, 1.0, 1.0, 1.0)),
+						hash24(i + vec4(1.0, 1.0, 1.0, 1.0)), u.x
+					), u.y
+				), u.z
+			), u.w
+		);
+}
+
+#endif
+)")
+	// ==================== noise.glsl ==================== END
 }
 
 } // MM::OpenGL

framework/opengl_renderer/src/mm/opengl/res/shaders_builtin.hpp

@@ -6,6 +6,8 @@ namespace MM::OpenGL {
 // file list:
 // - sampling.glsl
 // - tonemapping.glsl
+// - hashing.glsl
+// - noise.glsl
 void load_builtin_shaders_fs(void);
 
 } // MM::OpenGL

framework/opengl_renderer/test/CMakeLists.txt

@@ -168,7 +168,6 @@ target_link_libraries(hdr_bloom_pipeline_example
 	opengl_renderer_s
 	organizer_scene
 	clear_render_task
-	blit_fb_render_task
 	simple_rect_render_task
 
 	#bloom_extraction_render_task
@@ -187,3 +186,27 @@ target_link_libraries(hdr_bloom_pipeline_example
 
 add_test(NAME hdr_bloom_pipeline_example COMMAND hdr_bloom_pipeline_example)
 
+################# lite_particles2d (the test uses bloom)
+
+add_executable(lite_particles2d_test ./lite_particles2d.cpp)
+
+target_link_libraries(lite_particles2d_test
+	opengl_renderer_s
+	organizer_scene
+	clear_render_task
+	#simple_rect_render_task
+	lite_particles2d # not only rendertask
+
+	bloom
+	composition_render_task
+
+	#simple_velocity_system
+	#transform_system
+
+	random
+
+	gtest_main
+)
+
+add_test(NAME lite_particles2d_test COMMAND lite_particles2d_test)
+

framework/opengl_renderer/test/batched_spritesheet_render_task_test.cpp

@@ -68,7 +68,7 @@ TEST(batched_spritesheet_render_task, it) {
 	auto& rs = engine.addService<MM::Services::OpenGLRenderer>();
 	ASSERT_TRUE(engine.enableService<MM::Services::OpenGLRenderer>());
 
-	auto& cam = scene.set<MM::OpenGL::Camera3D>();
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
 	cam.horizontalViewPortSize = 5;
 	cam.setOrthographic();
 	cam.updateView();
@@ -87,8 +87,8 @@ TEST(batched_spritesheet_render_task, it) {
 
 
 	// setup systems
-	scene.set<float>(0.f); // accu
+	scene.ctx().emplace<float>(0.f); // accu
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<&update_spritesheet_animation>("update_spritesheet_animation");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");

framework/opengl_renderer/test/blur_render_task_test.cpp

@@ -129,9 +129,12 @@ TEST(blur_render_task, it) {
 	scene.on_update<MM::Components::Scale2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 	scene.on_update<MM::Components::Rotation2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>(); // in this example only rotation is touched
 
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
+	cam.setOrthographic();
+	cam.updateView();
 
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<MM::Systems::simple_rotational_velocity_patching>("simple_rotational_velocity_patching");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");

framework/opengl_renderer/test/builtins.cpp

@@ -37,6 +37,8 @@ R"(
 
 #include "/shaders/builtin/sampling.glsl"
 #include "/shaders/builtin/tonemapping.glsl"
+#include "/shaders/builtin/hashing.glsl"
+#include "/shaders/builtin/noise.glsl"
 
 void main() {
 }

framework/opengl_renderer/test/fast_sky_render_task_test.cpp

@@ -42,18 +42,18 @@ TEST(fast_sky_render_task, it) {
 	rs.addRenderTask<MM::OpenGL::RenderTasks::FastSky>(engine);
 
 	// setup systems
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<&MM::Systems::fast_sky_sun>("fast_sky_sun");
 
 	// HACK: instead you would switch to this scene
 	engine.getService<MM::Services::OrganizerSceneService>().updateOrganizerVertices(scene);
 
 
-	auto& cam = scene.set<MM::OpenGL::Camera3D>();
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
 	cam.setPerspective();
 	cam.updateView();
 
-	scene.set<MM::OpenGL::RenderTasks::FastSkyContext>();
+	scene.ctx().emplace<MM::OpenGL::RenderTasks::FastSkyContext>();
 
 	engine.run();
 }

framework/opengl_renderer/test/hdr_bloom_pipeline_example.cpp

@@ -119,46 +119,6 @@ static void setup_fbos(MM::Engine& engine) {
 
 	const float render_scale = 1.f;
 
-#if 0
-	rs.targets["clear_opaque"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("albedo"_hs), GL_COLOR_ATTACHMENT0)
-		.attachTexture(rm_t.get("opaque_depth"_hs), GL_DEPTH_ATTACHMENT)
-		.setResize(true)
-		.finish();
-	assert(rs.targets["clear_opaque"]);
-
-	rs.targets["clear_opaque_normal"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("normal"_hs), GL_COLOR_ATTACHMENT0)
-		.setResize(true)
-		.finish();
-	assert(rs.targets["clear_opaque"]);
-
-	rs.targets["opaque"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("albedo"_hs), GL_COLOR_ATTACHMENT0)
-		.attachTexture(rm_t.get("normal"_hs), GL_COLOR_ATTACHMENT1)
-		.attachTexture(rm_t.get("opaque_depth"_hs), GL_DEPTH_ATTACHMENT)
-		.setResize(true)
-		.finish();
-	assert(rs.targets["opaque"]);
-
-	rs.targets["tmp_read"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("normal"_hs), GL_COLOR_ATTACHMENT0)
-		.setResize(false)
-		.finish();
-	assert(rs.targets["tmp_read"]);
-
-	rs.targets["depth_read"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("opaque_depth"_hs), GL_DEPTH_ATTACHMENT)
-		.setResize(false)
-		.finish();
-	assert(rs.targets["depth_read"]);
-
-	rs.targets["deferred_shading"] = MM::OpenGL::FBOBuilder::start()
-		.attachTexture(rm_t.get("hdr_color"_hs), GL_COLOR_ATTACHMENT0)
-		.setResize(true)
-		.finish();
-	assert(rs.targets["deferred_shading"]);
-#endif
 	rs.targets["game_view"] = MM::OpenGL::FBOBuilder::start()
 		.attachTexture(rm_t.get("hdr_color"_hs), GL_COLOR_ATTACHMENT0)
 		.attachTexture(rm_t.get("depth"_hs), GL_DEPTH_ATTACHMENT)
@@ -230,9 +190,12 @@ TEST(hdr_bloom_pipeline, it) {
 	scene.on_update<MM::Components::Scale2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 	scene.on_update<MM::Components::Rotation2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>(); // in this example only rotation is touched
 
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
+	cam.setOrthographic();
+	cam.updateView();
 
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<MM::Systems::simple_rotational_velocity_patching>("simple_rotational_velocity_patching");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");

framework/opengl_renderer/test/lite_particles2d.cpp

@@ -0,0 +1,371 @@
+#include <gtest/gtest.h>
+
+#include <mm/engine.hpp>
+
+#include <mm/services/filesystem.hpp>
+#include <mm/services/sdl_service.hpp>
+#include <mm/services/organizer_scene.hpp>
+#include <mm/services/opengl_renderer.hpp>
+
+#include <mm/fs_const_archiver.hpp>
+
+#include <entt/entity/registry.hpp>
+#include <entt/entity/organizer.hpp>
+#include <entt/core/hashed_string.hpp>
+
+#include <mm/opengl/render_tasks/clear.hpp>
+#include <mm/opengl/render_tasks/lite_particles2d.hpp>
+#include <mm/opengl/bloom.hpp>
+#include <mm/opengl/render_tasks/composition.hpp>
+
+// ctx
+#include <mm/opengl/components/lite_particles2d.hpp>
+#include <mm/components/time_delta.hpp>
+#include <mm/opengl/camera_3d.hpp>
+
+// components
+#include <mm/components/position2d.hpp>
+
+#include <mm/resource_manager.hpp>
+#include <mm/opengl/texture_loader.hpp>
+#include <mm/opengl/lite_particles2d_type_loader.hpp>
+
+#include <mm/opengl/fbo_builder.hpp>
+
+#include <mm/random/srng.hpp>
+
+#include <glm/vec2.hpp>
+#include <glm/vec4.hpp>
+#include <glm/common.hpp>
+#include <glm/gtc/constants.hpp>
+#include <glm/trigonometric.hpp>
+
+#include <mm/scalar_range2.hpp>
+
+#include <vector>
+#include <string>
+
+using namespace entt::literals;
+
+namespace Components {
+
+// or what ever
+struct LiteParticles2DEmitter {
+	float age {0.f}; // this changes each tick, if >=1, spawn and reset to 0
+	float age_delta {1.f}; // times per sec
+
+	MM::ScalarRange2<uint16_t> particle_count {1u, 1u};
+
+	// particles data
+
+	std::string p_type {};
+
+	MM::ScalarRange2<float> p_pos_x {0.f, 0.f};
+	MM::ScalarRange2<float> p_pos_y {0.f, 0.f};
+
+	MM::ScalarRange2<float> p_dir {0.f, 0.f}; // 0-1, not rad
+	MM::ScalarRange2<float> p_dir_force {0.f, 0.f};
+
+	MM::ScalarRange2<float> p_age {0.f, 0.f};
+};
+
+} // Components
+
+namespace Systems {
+
+void lite_particles2d_emit(
+	entt::view<entt::get_t<
+		const MM::Components::Position2D,
+		Components::LiteParticles2DEmitter
+	>> view,
+	const MM::Components::TimeDelta& td,
+	MM::Components::LiteParticles2DUploadQueue& lp_uq,
+	MM::Random::SRNG& rng
+) {
+	view.each([&lp_uq, &td, &rng](const auto& pos, Components::LiteParticles2DEmitter& lpe) {
+		lpe.age += lpe.age_delta * td.tickDelta;
+
+		if (lpe.age < 1.f) {
+			return;
+		}
+
+		lpe.age = 0.f; // TODO: dont discard ?
+
+		const auto type = entt::hashed_string::value(lpe.p_type.c_str());
+
+		const size_t count = rng.range(lpe.particle_count);
+		for (size_t i = 0; i < count; i++) {
+			float dir = rng.range(lpe.p_dir) * glm::two_pi<float>();
+			lp_uq.queue.push(MM::Components::LiteParticle2D{
+				type, // type
+
+				//{rng.negOneToOne() * 30.f, rng.negOneToOne() * 30.f}, // pos
+				pos.pos + /*lpe.pos_offset +*/ glm::vec2{rng.range(lpe.p_pos_x), rng.range(lpe.p_pos_y)}, // pos
+				glm::vec2{glm::cos(dir), glm::sin(dir)} * rng.range(lpe.p_dir_force), // vel
+
+				rng.range(lpe.p_age) // age
+			});
+		}
+	});
+}
+
+} // Systems
+
+const char* argv0;
+
+static void setup_textures(MM::Engine& engine) {
+	auto& rm_t = MM::ResourceManager<MM::OpenGL::Texture>::ref();
+	auto [w, h] = engine.getService<MM::Services::SDLService>().getWindowSize();
+
+	// we dont have a gbuffer in this example
+	{ // gbuffer
+		// depth
+#ifdef MM_OPENGL_3_GLES
+		rm_t.reload<MM::OpenGL::TextureLoaderEmpty>(
+			"depth",
+			GL_DEPTH_COMPONENT24, // d16 is the onlyone for gles 2 (TODO: test for 3)
+			w, h,
+			GL_DEPTH_COMPONENT, GL_UNSIGNED_INT
+		);
+#else
+		rm_t.reload<MM::OpenGL::TextureLoaderEmpty>(
+			"depth",
+			GL_DEPTH_COMPONENT32F, // TODO: stencil?
+			w, h,
+			GL_DEPTH_COMPONENT, GL_FLOAT
+		);
+#endif
+	}
+
+	const float render_scale = 1.f;
+
+	// hdr color gles3 / webgl2
+	rm_t.reload<MM::OpenGL::TextureLoaderEmpty>(
+		"hdr_color",
+		GL_RGBA16F,
+		w * render_scale, h * render_scale,
+		GL_RGBA,
+		GL_HALF_FLOAT
+	);
+	{ // filter
+		rm_t.get("hdr_color"_hs)->bind(0);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	}
+}
+
+static void setup_fbos(MM::Engine& engine) {
+	auto& rs = engine.getService<MM::Services::OpenGLRenderer>();
+	auto& rm_t = MM::ResourceManager<MM::OpenGL::Texture>::ref();
+
+	const float render_scale = 1.f;
+
+	rs.targets["game_view"] = MM::OpenGL::FBOBuilder::start()
+		.attachTexture(rm_t.get("hdr_color"_hs), GL_COLOR_ATTACHMENT0)
+		.attachTexture(rm_t.get("depth"_hs), GL_DEPTH_ATTACHMENT)
+		.setResizeFactors(render_scale, render_scale)
+		.setResize(true)
+		.finish();
+	assert(rs.targets["game_view"]);
+}
+
+void setup_particles_types(MM::Engine& engine) {
+	auto& lpt_rm = MM::ResourceManager<MM::OpenGL::LiteParticles2DType>::ref();
+
+	lpt_rm.load<MM::OpenGL::LiteParticles2DTypeLoaderJson>("MM::spark1",
+R"({
+  "compute": {
+    "age_delta": 2.0,
+    "force_vec": { "x": 0.0, "y": -5.0 },
+    "turbulence": 1.0,
+    "turbulence_individuality": 1.0,
+    "turbulence_noise_scale": 1.0,
+    "turbulence_time_scale": 1.0,
+    "dampening": 1.0
+  },
+  "render": {
+    "color_start": {
+      "x": 6.0,
+      "y": 6.0,
+      "z": 1.8,
+      "w": 1.0
+    },
+    "color_end": {
+      "x": 1.5,
+      "y": 1.0,
+      "z": 0.3,
+      "w": 1.0
+    },
+    "size_start": 0.01,
+    "size_end": 0.002
+  }
+})"_json);
+
+	// mount into vfx
+	FS_CONST_MOUNT_FILE("/particles/lite_particles2d/fire1.json",
+R"({
+  "compute": {
+    "age_delta": 1.0,
+    "force_vec": { "x": 0.0, "y": 5.0 },
+    "turbulence": 5.0,
+    "turbulence_individuality": 1.0,
+    "turbulence_noise_scale": 1.0,
+    "turbulence_time_scale": 1.0,
+    "dampening": 0.0
+  },
+  "render": {
+    "color_start": {
+      "x": 3.0,
+      "y": 2.1,
+      "z": 1.5,
+      "w": 0.8
+    },
+    "color_end": {
+      "x": 3.0,
+      "y": 1.1,
+      "z": 1.0,
+      "w": 0.0
+    },
+    "size_start": 0.15,
+    "size_end": 0.4
+  }
+})");
+	// and load it
+	lpt_rm.load<MM::OpenGL::LiteParticles2DTypeLoaderFile>("MM::fire1", engine, "/particles/lite_particles2d/fire1.json");
+
+}
+
+TEST(lite_particles2d, it) {
+	MM::Engine engine;
+
+	auto& sdl_ss = engine.addService<MM::Services::SDLService>();
+	ASSERT_TRUE(engine.enableService<MM::Services::SDLService>());
+
+	sdl_ss.createGLWindow("lite_particles2d", 1280, 720);
+
+	engine.addService<MM::Services::OrganizerSceneService>();
+	ASSERT_TRUE(engine.enableService<MM::Services::OrganizerSceneService>());
+
+	bool provide_ret = engine.provide<MM::Services::SceneServiceInterface, MM::Services::OrganizerSceneService>();
+	ASSERT_TRUE(provide_ret);
+	auto& scene = engine.tryService<MM::Services::SceneServiceInterface>()->getScene();
+
+	engine.addService<MM::Services::FilesystemService>(argv0, "lite_particles2d");
+	ASSERT_TRUE(engine.enableService<MM::Services::FilesystemService>());
+
+	auto& rs = engine.addService<MM::Services::OpenGLRenderer>();
+	ASSERT_TRUE(engine.enableService<MM::Services::OpenGLRenderer>());
+
+	// load particle types
+	// before addRenderTask<LiteParticle2D>
+	// OR
+	// call LiteParticle2D::resetTypeBuffers()
+	setup_particles_types(engine);
+
+	{ // setup rendering
+		// TODO: split vertically
+		setup_textures(engine);
+		setup_fbos(engine);
+
+		// clear
+		auto& clear_opaque = rs.addRenderTask<MM::OpenGL::RenderTasks::Clear>(engine);
+		clear_opaque.target_fbo = "game_view";
+		// clears all color attachments
+		clear_opaque.r = 0.f;
+		clear_opaque.g = 0.f;
+		clear_opaque.b = 0.f;
+		clear_opaque.a = 1.f;
+		clear_opaque.mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
+
+		{ // render
+			//MM::OpenGL::RenderTasks::SimpleRect& bsrr_rend = rs.addRenderTask<MM::OpenGL::RenderTasks::SimpleRect>(engine);
+			//bsrr_rend.target_fbo = "game_view";
+			auto& lprt = rs.addRenderTask<MM::OpenGL::RenderTasks::LiteParticles2D>(engine);
+			lprt.target_fbo = "game_view";
+		}
+
+		// rn does rt too
+		MM::OpenGL::setup_bloom(engine);
+
+		// not part of setup_bloom
+		auto& comp = rs.addRenderTask<MM::OpenGL::RenderTasks::Composition>(engine);
+		comp.color_tex = "hdr_color";
+		comp.bloom_tex = "blur_tmp1";
+		comp.target_fbo = "display";
+	}
+
+
+	// setup scene
+
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
+	cam.horizontalViewPortSize = 30.f;
+	cam.setOrthographic();
+	cam.updateView();
+
+	scene.ctx().emplace<MM::Components::LiteParticles2DUploadQueue>();
+
+	scene.ctx().emplace<MM::Random::SRNG>(42u);
+
+	// setup v system
+	auto& org = scene.ctx().emplace<entt::organizer>();
+	org.emplace<Systems::lite_particles2d_emit>("lite_particles2d_emit");
+
+	// HACK: instead you would switch to this scene
+	engine.getService<MM::Services::OrganizerSceneService>().updateOrganizerVertices(scene);
+
+	{ // default
+		auto e = scene.create();
+		auto& p = scene.emplace<MM::Components::Position2D>(e);
+		p.pos.x = -10.f;
+
+		auto& lpe = scene.emplace<Components::LiteParticles2DEmitter>(e);
+		lpe.age_delta = 60.f;
+		lpe.particle_count = {1, 1};
+		lpe.p_type = "default";
+		lpe.p_dir = {-0.1f, +0.1f};
+		lpe.p_dir_force = {0.f, 8.f};
+		lpe.p_age = {0.f, 0.7f};
+	}
+
+	{ // sparks
+		auto e = scene.create();
+		auto& p = scene.emplace<MM::Components::Position2D>(e);
+		p.pos.x = 0.f;
+
+		auto& lpe = scene.emplace<Components::LiteParticles2DEmitter>(e);
+		lpe.age_delta = 1.f;
+		lpe.particle_count = {25, 40};
+		lpe.p_type = "MM::spark1";
+		lpe.p_dir = {0.f, 1.f};
+		lpe.p_dir_force = {0.f, 1.f}; // m/s
+		lpe.p_age = {0.f, 0.7f};
+	}
+
+	{ // fire
+		auto e = scene.create();
+		auto& p = scene.emplace<MM::Components::Position2D>(e);
+		p.pos.x = 10.f;
+
+		auto& lpe = scene.emplace<Components::LiteParticles2DEmitter>(e);
+		lpe.age_delta = 60.f;
+		lpe.particle_count = {1, 1};
+		lpe.p_type = "MM::fire1";
+		lpe.p_dir = {0.f, 1.f};
+		lpe.p_dir_force = {0.f, 1.f};
+		lpe.p_age = {0.f, 0.5f};
+	}
+
+	engine.run();
+}
+
+int main(int argc, char** argv) {
+	argv0 = argv[0];
+
+	::testing::InitGoogleTest(&argc, argv);
+
+	return RUN_ALL_TESTS();
+}
+

framework/opengl_renderer/test/simple_rect_render_task_test.cpp

@@ -62,8 +62,12 @@ TEST(simple_rect_render_task, it) {
 	scene.on_update<MM::Components::Scale2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 	scene.on_update<MM::Components::Rotation2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>(); // in this example only rotation is touched
 
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
+	cam.setOrthographic();
+	cam.updateView();
+
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<MM::Systems::simple_rotational_velocity_patching>("simple_rotational_velocity_patching");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");

framework/opengl_renderer/test/simple_sprite_render_task_test.cpp

@@ -65,9 +65,12 @@ TEST(simple_sprite_render_task, it) {
 	scene.on_update<MM::Components::Scale2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 	scene.on_update<MM::Components::Rotation2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>(); // in this example only rotation is touched
 
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
+	cam.setOrthographic();
+	cam.updateView();
 
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<MM::Systems::simple_rotational_velocity_patching>("simple_rotational_velocity_patching");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");

framework/opengl_renderer/test/simple_spritesheet_render_task_test.cpp

@@ -64,7 +64,7 @@ TEST(simple_spritesheet_render_task, it) {
 	auto& rs = engine.addService<MM::Services::OpenGLRenderer>();
 	ASSERT_TRUE(engine.enableService<MM::Services::OpenGLRenderer>());
 
-	auto& cam = scene.set<MM::OpenGL::Camera3D>();
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
 	cam.horizontalViewPortSize = 5;
 	cam.setOrthographic();
 	cam.updateView();
@@ -82,8 +82,8 @@ TEST(simple_spritesheet_render_task, it) {
 	scene.on_update<MM::Components::Scale2D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 
 	// setup systems
-	scene.set<float>(0.f); // accu
+	scene.ctx().emplace<float>(0.f); // accu
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<&update_spritesheet_animation>("update_spritesheet_animation");
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");
@@ -103,7 +103,7 @@ TEST(simple_spritesheet_render_task, it) {
 		auto e = scene.create();
 		auto& p = scene.emplace<MM::Components::Position2D>(e);
 		p.pos.x = -1.f;
-	
+
 		// zoffset is created by event
 
 		auto& s = scene.emplace<MM::Components::Scale2D>(e);

framework/opengl_renderer/test/tilemap_render_task_test.cpp

@@ -39,7 +39,7 @@ TEST(tilemap_render_task_test, it) {
 	ASSERT_TRUE(provide_ret);
 	auto& scene = engine.tryService<MM::Services::SceneServiceInterface>()->getScene();
 
-	auto& cam = scene.set<MM::OpenGL::Camera3D>();
+	auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
 	cam.translation = {2.f, -2.f, 0.f};
 	cam.horizontalViewPortSize = 20.f;
 	cam.setOrthographic();
@@ -63,7 +63,7 @@ TEST(tilemap_render_task_test, it) {
 	scene.on_update<MM::Components::Position2D_ZOffset>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 	scene.on_update<MM::Components::Position3D>().connect<&entt::registry::emplace_or_replace<MM::Components::DirtyTransformTag>>();
 
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<MM::Systems::position3d_from_2d>("position3d_from_2d");
 	org.emplace<MM::Systems::transform3d_translate>("transform3d_translate");
 	org.emplace<MM::Systems::transform_clear_dirty>("transform_clear_dirty");

framework/organizer_scene/src/mm/services/organizer_scene.cpp

@@ -52,7 +52,7 @@ bool OrganizerSceneService::enable(Engine& engine, std::vector<UpdateStrategies:
 	// default scene
 	if (!_scene) {
 		_scene = std::make_unique<Scene>();
-		_scene->set<MM::Engine&>(engine);
+		_scene->ctx().emplace<MM::Engine&>(engine);
 		updateOrganizerVertices(*_scene);
 	}
 
@@ -74,14 +74,14 @@ void OrganizerSceneService::sceneFixedUpdate(Engine&) {
 
 	size_t continuous_counter = 0;
 
-	auto& time_ctx = _scene->ctx_or_set<MM::Components::TimeDelta>(f_delta, initial_delta_factor);
+	auto& time_ctx = _scene->ctx().emplace<MM::Components::TimeDelta>(f_delta, initial_delta_factor);
 	time_ctx.tickDelta = f_delta * time_ctx.deltaFactor;
 
 	while (_accumulator >= f_delta){
 		_accumulator -= f_delta;
 		continuous_counter++;
 
-		for (auto&& v : _scene->ctx<std::vector<entt::organizer::vertex>>()) {
+		for (auto&& v : _scene->ctx().at<std::vector<entt::organizer::vertex>>()) {
 			v.callback()(v.data(), *_scene);
 		}
 
@@ -97,8 +97,8 @@ void OrganizerSceneService::changeSceneFixedUpdate(Engine& engine) {
 	if (_next_scene) {
 		LOG_OSS("changing scene...");
 		_scene = std::move(_next_scene);
-		if (!_scene->try_ctx<MM::Engine>()) {
+		if (!_scene->ctx().contains<MM::Engine>()) {
-			_scene->set<MM::Engine&>(engine); // make engine accessible from scene
+			_scene->ctx().emplace<MM::Engine&>(engine); // make engine accessible from scene
 		}
 		updateOrganizerVertices(*_scene);
 	}
@@ -119,14 +119,14 @@ void OrganizerSceneService::changeSceneNow(std::unique_ptr<Scene>&& new_scene) {
 }
 
 void OrganizerSceneService::updateOrganizerVertices(Scene& scene) {
-	scene.ctx_or_set<std::vector<entt::organizer::vertex>>() =
+	scene.ctx().emplace<std::vector<entt::organizer::vertex>>() =
-		scene.ctx_or_set<entt::organizer>().graph();
+		scene.ctx().emplace<entt::organizer>().graph();
 
-	if (!scene.try_ctx<MM::Components::TimeDelta>()) {
+	if (!scene.ctx().contains<MM::Components::TimeDelta>()) {
-		scene.set<MM::Components::TimeDelta>();
+		scene.ctx().emplace<MM::Components::TimeDelta>();
 	}
 
-	SPDLOG_DEBUG("graph:\n{}", scene.ctx<std::vector<entt::organizer::vertex>>());
+	SPDLOG_DEBUG("graph:\n{}", scene.ctx().at<std::vector<entt::organizer::vertex>>());
 }
 
 void OrganizerSceneService::resetTime(void) {

framework/resource_manager/src/mm/resource_manager.hpp

@@ -85,7 +85,8 @@ class ResourceManager {
 			discard(entt::hashed_string{id}.value());
 		}
 
-		void each(std::function<void(res_id_type, std::shared_ptr<Resource>)>& fn) {
+		template<typename FN>
+		void each(FN&& fn) {
 			for (auto& it : _storage) {
 				fn(it.first, it.second);
 			}

screens/mm_logo/src/mm/screens/mm_logo_screen.cpp

@@ -120,11 +120,11 @@ void create_mm_logo(MM::Engine& engine, MM::Services::ScreenDirector::Screen& sc
 		auto new_scene = std::make_unique<MM::Scene>();
 		auto& scene = *new_scene;
 
-		auto& org = scene.set<entt::organizer>();
+		auto& org = scene.ctx().emplace<entt::organizer>();
 
-		scene.set<MM::Engine&>(_engine); // alias
+		scene.ctx().emplace<MM::Engine&>(_engine); // alias
 
-		scene.set<Components::screen_timer>(0.f, screen_duration, next_screen);
+		scene.ctx().emplace<Components::screen_timer>(0.f, screen_duration, next_screen);
 
 		org.emplace<Systems::screen_timer_system>("screen_timer_system");
 
@@ -135,7 +135,7 @@ void create_mm_logo(MM::Engine& engine, MM::Services::ScreenDirector::Screen& sc
 		org.emplace<MM::Systems::transform3d_scale2d>("transform3d_scale2d");
 		//org.emplace<MM::Systems::transform_clear_dirty>("transform_clear_dirty");
 
-		auto& cam = scene.set<MM::OpenGL::Camera3D>();
+		auto& cam = scene.ctx().emplace<MM::OpenGL::Camera3D>();
 		cam.horizontalViewPortSize = 89.f;
 		cam.setOrthographic();
 		cam.updateView();

systems/player_velocity/test/player_velocity_test.cpp

@@ -29,7 +29,7 @@ TEST(player_velocity, basic_run) {
 	auto& scene = engine.getService<MM::Services::SceneServiceInterface>().getScene();
 
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<&MM::Systems::player_velocity2d>("player_velocity2d");
 
 	// HACK: instead you would switch to this scene

systems/simple_velocity/test/simple_velocity_test.cpp

@@ -11,13 +11,13 @@ TEST(simple_velocity_2d, basic_run) {
 	MM::Scene scene;
 
 	// setup v system
-	auto& org = scene.set<entt::organizer>();
+	auto& org = scene.ctx().emplace<entt::organizer>();
 	org.emplace<&MM::Systems::simple_positional_velocity>("simple_positional_velocity");
 	org.emplace<&MM::Systems::simple_rotational_velocity>("simple_rotational_velocity");
 	auto graph = org.graph();
 
 	// setup delta
-	auto& time_ctx = scene.ctx_or_set<MM::Components::TimeDelta>(1.f/60.f, 1.f);
+	auto& time_ctx = scene.ctx().emplace<MM::Components::TimeDelta>(1.f/60.f, 1.f);
 	time_ctx.tickDelta = 1.f/60.f * time_ctx.deltaFactor;
 
 	// setup test entity