add Ecs demo usage

examples/Ecs/example.passlist

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+passlist "Forward Passlist"
+{
+    attachment "DepthBuffer"
+    {
+        format "PreferredDepthStencil"
+    }
+
+    pass "DepthPrepass"
+    {
+        impl "Depth"
+        {
+            MatPass "DepthPass"
+        }
+
+        depthstenciloutput "DepthBuffer"
+    }
+
+    attachment "ForwardOutput"
+    {
+        format "RGBA16F"
+    }
+
+    pass "ForwardPass"
+    {
+        impl "Forward"
+        output "Output" "ForwardOutput"
+        depthstencilinput "DepthBuffer"
+        depthstenciloutput "DepthBuffer"
+        flag "LightShadowing"
+    }
+
+    attachment "Gamma"
+    {
+        format "RGBA8"
+    }
+
+    pass "Gamma correction"
+    {
+        impl "PostProcess"
+        {
+            Shader "PostProcess.GammaCorrection"
+        }
+
+        input "Input" "ForwardOutput"
+        output "Output" "Gamma"
+    }
+
+    attachment "ImguiOutput"
+    {
+        format "RGBA8"
+    }
+	
+	pass "Imgui"
+	{
+        impl "Imgui"
+        input "Input" "Gamma"
+        output "Output" "ImguiOutput"
+	}
+
+    output "ImguiOutput"
+}

examples/Ecs/main.cpp

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+
+#include <Nazara/Core.hpp>
+#include <Nazara/Graphics.hpp>
+#include <Nazara/Platform.hpp>
+#include <Nazara/Renderer.hpp>
+#include <Nazara/Utility.hpp>
+
+#include <NazaraImgui/NazaraImgui.hpp>
+
+NAZARA_REQUEST_DEDICATED_GPU()
+
+struct MyImguiWindow
+	: private Nz::ImguiHandler
+{
+	MyImguiWindow()
+	{
+		Nz::Imgui::Instance()->AddHandler(this);
+	}
+
+	~MyImguiWindow()
+	{
+		Nz::Imgui::Instance()->RemoveHandler(this);
+	}
+
+	void OnRenderImgui() override
+	{
+		ImGui::Begin("Handler Window");
+		ImGui::InputFloat4("position", values);
+		ImGui::End();
+	}
+
+	float values[4] = { 0 };
+};
+
+#if 1
+int main(int argc, char* argv[])
+#else
+int WinMain(int argc, char* argv[])
+#endif
+{
+	NazaraUnused(argc);
+	NazaraUnused(argv);
+
+	Nz::Application<Nz::Graphics, Nz::Imgui> nazara;
+	auto& windowing = nazara.AddComponent<Nz::AppWindowingComponent>();
+	std::shared_ptr<Nz::RenderDevice> device = Nz::Graphics::Instance()->GetRenderDevice();
+
+	auto& ecs = nazara.AddComponent<Nz::AppEntitySystemComponent>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
+
+	auto& renderer = world.AddSystem<Nz::RenderSystem>();
+
+	std::string windowTitle = "Nazara Imgui Demo";
+	Nz::Window& window = windowing.CreateWindow(Nz::VideoMode(1280, 720, 32), windowTitle);
+	auto& swapchain = renderer.CreateSwapchain(window);
+
+	// Init imgui now that the window is created
+	Nz::Imgui::Instance()->Init(window);
+	ImGui::EnsureContextOnThisThread();
+
+	// configure camera
+	auto camera = world.CreateEntity();
+	auto passList = Nz::PipelinePassList::LoadFromFile("example.passlist");
+	camera.emplace<Nz::NodeComponent>();
+
+	auto& cameraComponent = camera.emplace<Nz::CameraComponent>(&swapchain, passList, Nz::ProjectionType::Perspective);
+	cameraComponent.UpdateFOV(70.f);
+	cameraComponent.UpdateClearColor(Nz::Color(0.46f, 0.48f, 0.84f, 1.f));
+
+	// Load test texture
+	Nz::TextureParams texParams;
+	texParams.renderDevice = Nz::Graphics::Instance()->GetRenderDevice();
+	texParams.loadFormat = Nz::PixelFormat::RGBA8;
+	auto logo = Nz::Texture::LoadFromFile("LogoMini.png", texParams);
+
+	// connect basic handler
+	window.GetEventHandler().OnQuit.Connect([&window](const auto* handler) {
+		NazaraUnused(handler);
+		window.Close();
+	});
+	
+	MyImguiWindow mywindow;
+	float val = 0.f;
+	float color[4] = { 1,0,0,1 };
+
+	Nz::MillisecondClock updateClock;
+
+	nazara.AddUpdaterFunc(Nz::ApplicationBase::Interval{ Nz::Time::Milliseconds(16) }, [&](Nz::Time elapsed) {
+		if (!window.IsOpen())
+			return;
+
+		window.ProcessEvents();
+
+		Nz::Imgui::Instance()->Update(elapsed.AsMilliseconds() / 1000.f);
+
+		if (ImGui::BeginMainMenuBar())
+		{
+			if (ImGui::BeginMenu("Test"))
+			{
+				if (ImGui::MenuItem("Test", "Ctrl+O"))
+					printf("test\n");
+				ImGui::EndMenu();
+			}
+			ImGui::EndMainMenuBar();
+		}
+		if (ImGui::BeginPopupModal("toto"))
+		{
+			ImGui::EndPopup();
+		}
+		ImGui::Begin("Loop Window");
+		ImGui::Image(logo.get());
+		ImGui::ImageButton(logo.get());
+		ImGui::SliderFloat("test", &val, 0, 10);
+		ImGui::ColorPicker4("Color", color, ImGuiColorEditFlags_PickerHueWheel | ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_InputRGB);
+
+		ImGui::InputFloat4("value from 2nd window", mywindow.values, "%.3f", ImGuiInputTextFlags_ReadOnly);
+		ImGui::End();
+
+		Nz::Imgui::Instance()->Render();
+	});
+
+	return nazara.Run();
+}

examples/Ecs/xmake.lua

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+
+target("NzImgui-ecs-demo")
+	set_group("Examples")
+	add_files("main.cpp")
+	add_packages("nazara")
+	add_deps("NazaraImgui")
+	set_rundir(".")