Removing big memory hog from renderer

Editor/src/UI/widgets.h

@@ -125,26 +125,12 @@ public:
 
 class Viewport : EditorWindow {
 public:
-    Viewport (Scene& scene) : EditorWindow("SceneView") {
+    Viewport (Framebuffer& fb) : EditorWindow("SceneView") {
-       Framebuffer framebuffer = Framebuffer((int)ImGui::GetWindowWidth(),(int)ImGui::GetWindowHeight());
-
-      
-       Renderer renderer = Renderer();
-       renderer.Prepare(scene);
-       renderer.Render(&framebuffer, scene);
-
-      
-       
-   
-   
       ImGui::Image(
-            (void*)(intptr_t)framebuffer.GetColourAttachment(),
+            (void*)(intptr_t)fb.GetColourAttachment(),
             ImVec2{ (float)ImGui::GetWindowWidth(),(float)ImGui::GetWindowHeight() }
         );
         
-
-        
-        
         //ImGuizmo::SetDrawlist();
         //ImGuizmo::SetRect(ImGui::GetWindowPos().x, ImGui::GetWindowPos().y, ImGui::GetWindowWidth(), ImGui::GetWindowHeight());
         //ImGuizmo::Enable(true);

Editor/src/app.cpp

@@ -14,17 +14,28 @@
 #include "AssetManagement/AssetManager.h"
 #include "UI/MainMenuBar.h"
 
+
 const unsigned int MS_PER_UPDATE = 2;
 void CreateTestProject(std::unique_ptr<Project>& project, Scene& scene);
 
 class Editor : public Application {
 public:
-    Editor() : Application("Editor") {}
+    Editor() : Application("Editor"){
+    }
 
     void Run() override
     {
+
         auto NativeEditorWindow = NativeWindow(1200, 700);
-        //auto renderer =  Renderer();
+
+        framebuffer = new Framebuffer(800, 600);
+        auto renderer =  Renderer(RendererConfig{ 
+            1200, // Screen Width
+            700, // Screen Height
+            glm::vec3{0,0,0}, // Clear Color
+            true // Depth testing  
+            });
+
         auto GuiRenderer = GUIRenderer(NativeEditorWindow);
 
         Selected = (entt::entity)-1;
@@ -33,10 +44,11 @@ public:
 
         ActiveScene.Start();
 
+        renderer.setCurrentFrameBuffer(*framebuffer);
+
+       
         double previous = glfwGetTime();
         double lag = 0.0;
-
-
         while (!NativeEditorWindow.WindowShouldClose())
         {
 
@@ -53,8 +65,13 @@ public:
                 lag -= MS_PER_UPDATE;
             }
 
-           // renderer.Render(framebuffer, ActiveScene);
+            // submit DrawCommands for all render3DComponents
+            auto group = ActiveScene.getReg().view<TransformComponent, Render3DComponent>();
+            group.each([&renderer](auto enity, TransformComponent& t, Render3DComponent& renderComponent) {
+                renderer.Submit(renderComponent, t);
+            });
 
+            renderer.Render();
 
             GuiRenderer.Begin();
             RenderGUI();
@@ -66,6 +83,8 @@ public:
 
         }
 
+
+        delete framebuffer;
         ActiveScene.Stop();
 
     }
@@ -86,7 +105,7 @@ public:
         }
 
         {
-            Viewport sceneview = Viewport(ActiveScene);
+            Viewport sceneview = Viewport(*framebuffer);
         }
 
         {
@@ -108,7 +127,7 @@ public:
         }
 
         {
-            AssetFinder assetsView = AssetFinder();
+          //  AssetFinder assetsView = AssetFinder();
         }
         
         
@@ -127,6 +146,8 @@ private:
     std::unique_ptr<Project> CurrentProject;
     Scene ActiveScene;
     entt::entity  Selected;
+    Framebuffer* framebuffer ;
+
 
 };
 

YoggieEngine/src/Graphics/Primitives/DrawCommand.h

@@ -0,0 +1,12 @@
+#pragma once
+#include "Scene/Components.h"
+namespace YoggieEngine {
+	struct DrawCommand {
+		unsigned int VAO_identifier;
+		unsigned int num_elements;
+		unsigned int IBO_identifier;
+		TransformComponent transform;
+		Shader shader;
+		// Material
+	};
+};

YoggieEngine/src/Graphics/Renderer.cpp

@@ -1,24 +1,34 @@
 #include <YoggieEngine.h>
+
 #include "Renderer.h"
 #include "../Scene/Components.h"
-#include "../Graphics/Memory/VertexArray.h"
 #include "../Graphics/Memory/Buffer.h"
+#include "../Graphics/Memory/VertexArray.h"
+#include "../Graphics/Primitives/DrawCommand.h"
 
 namespace YoggieEngine {
 float Angle = 0.0;
 Camera cam = Camera(glm::vec3(12.0f, 0.0f, 0.0f), glm::vec3(0.0f, 0.0f, 0.0f), 90.0f);
 glm::mat4 projection = glm::perspective(glm::radians(cam.Zoom), (800.0f / 600.0f), 0.001f, 100.0f);
 
-Renderer::Renderer(){
+Renderer::Renderer(RendererConfig& config)
-	glEnable(GL_DEPTH_TEST);
+	: m_framebuffer(Framebuffer(config.ScreenWidth, config.ScreenHeight))
+{	
 	
 }
 
 Renderer::~Renderer(){}
 
-void Renderer::Prepare(Scene& scene ) {
+
-	auto group = scene.getReg().view<Render3DComponent>();
+void Renderer::Submit( Render3DComponent& renderComponent, TransformComponent& transform) {
-	group.each([](auto enity, Render3DComponent& renderComponent) {
+	
+	if (renderComponent.VAO == 0 || renderComponent.IBO == 0) 
+	{
+		if (renderComponent.VAO != 0)
+			glDeleteVertexArrays(1, &(renderComponent.VAO));
+		if (renderComponent.IBO != 0)
+			glDeleteBuffers(1, &(renderComponent.IBO));
+
 		VertexArray va = VertexArray();
 		Buffer vertexBuffer = Buffer();
 		Buffer elementBuffer = Buffer();
@@ -46,64 +56,80 @@ void Renderer::Prepare(Scene& scene ) {
 
 		renderComponent.VAO = va.getID();
 		renderComponent.IBO = elementBuffer.getBufferID();
-	});
+	}
+
+	DrawCommand dc = { renderComponent.VAO, renderComponent.mesh.elements.size(), renderComponent.IBO, transform, renderComponent.shader };
+	commands.push_back(dc);
+	
 }
 
-
+void Renderer::Render()
-
-void Renderer::Render(Scene& scene)
 {
-	auto group = scene.getReg().view<TransformComponent, Render3DComponent>();
+	glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer.GetId());
-	group.each([&](auto entity , TransformComponent& trans, Render3DComponent& renderComponent) 
-		{
-		glBindVertexArray(renderComponent.VAO);
-		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, renderComponent.IBO);
 
-		renderComponent.shader.Use();
+	if (m_depthTest) {
+		glEnable(GL_DEPTH_TEST);
+	}
 
-		auto lights = scene.getReg().view<LightComponent>();
+	glClearColor(m_clearColor.r, m_clearColor.g, m_clearColor.b, 1.0f);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	
+	std::cout << "Draw commands this frame:"  << commands.size() << std::endl;
+
+
+	for (const DrawCommand& command : commands)
+	{
+		glBindVertexArray(command.VAO_identifier);
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, command.IBO_identifier);
+
+		command.shader.Use();
+
+		glm::mat4 rotation = glm::rotate(glm::mat4(1.0f), command.transform.Rotation.x, glm::vec3(1.0f, 0.0f, 0.0f));
+		rotation *= glm::rotate(glm::mat4(1.0f), command.transform.Rotation.y, glm::vec3(0.0f, 1.0f, 0.0f));
+		rotation *= glm::rotate(glm::mat4(1.0f), command.transform.Rotation.z, glm::vec3(0.0f, 0.0f, 1.0f));
+
+
+		glm::mat4 modelMatrix = glm::translate(glm::mat4(1.0f), command.transform.Position) * glm::scale(glm::mat4(1.0f), command.transform.Scale) * rotation;
+
+
+		command.shader.setUniformVec3("Color", glm::vec3(1.0f, 0.0f, 0.0f));
+		command.shader.setUniformMat4("M", modelMatrix);
+		command.shader.setUniformMat4("V", cam.GetViewMatrix());
+		command.shader.setUniformMat4("P", projection);
+
+		glDrawElements(GL_TRIANGLES, static_cast<unsigned int>(command.num_elements),
+			GL_UNSIGNED_INT, NULL);
+
+		glBindVertexArray(0);
+
+	}
+
+
+	/*
+	* Lighting pass 
+	* 	auto lights = scene.getReg().view<LightComponent>();
 		lights.each([&](auto entity, LightComponent& light) {
 		  	renderComponent.shader.setUniformVec3("lighting.color", light.Color);
 			renderComponent.shader.setUniformFloat("lighting.strength", light.Strength);
 		});
+	* 
+	*/
 	
-
+	commands.clear();
-		glm::mat4 rotation = glm::rotate(glm::mat4(1.0f), trans.Rotation.x, glm::vec3(1.0f, 0.0f, 0.0f));
-		rotation *= glm::rotate(glm::mat4(1.0f), trans.Rotation.y, glm::vec3(0.0f, 1.0f, 0.0f));
-		rotation *= glm::rotate(glm::mat4(1.0f), trans.Rotation.z, glm::vec3(0.0f, 0.0f, 1.0f));
-
-
-		glm::mat4 modelMatrix = glm::translate(glm::mat4(1.0f), trans.Position) * glm::scale(glm::mat4(1.0f), trans.Scale) *rotation;
-
-
-		renderComponent.shader.setUniformVec3("Color", renderComponent.color);
-		renderComponent.shader.setUniformMat4("M", modelMatrix);
-		renderComponent.shader.setUniformMat4("V", cam.GetViewMatrix());
-		renderComponent.shader.setUniformMat4("P", projection);
-
-		//std::cout << "Draw " << renderComponent.mesh.elements.size() << " elements" << std::endl;
-		glDrawElements(GL_TRIANGLES, static_cast<unsigned int>(renderComponent.mesh.elements.size()) ,
-			GL_UNSIGNED_INT, NULL);
-
-		glBindVertexArray(0);
-	});
-
-}
-
-void Renderer::Render(Framebuffer* framebuffer, Scene& scene)
-{
-	if (framebuffer == nullptr)
-		return;
-
-	glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->GetId());
-
-	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-	Render(scene);
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
 
 
+void Renderer::setCurrentFrameBuffer(const Framebuffer& fb)
+{
+	m_framebuffer = fb;
+}
+
+void Renderer::setClearColor(const glm::vec3& ClearColor)
+{
+	m_clearColor = ClearColor;
+}
+
+
 }

YoggieEngine/src/Graphics/Renderer.h

@@ -1,23 +1,38 @@
 #pragma once
 #include "GLFW/glfw3.h"
-
+#include <vector>
 #include "../PerfCounter.h"
 
 #include "Renderable.h"
 #include "Memory/Framebuffer.h"
 #include "../Scene/Components.h"
 #include"../Scene/Scene.h"
+#include "Graphics/Primitives/DrawCommand.h"
 
 namespace YoggieEngine {
 
+	struct RendererConfig {
+		int ScreenWidth, ScreenHeight;
+		glm::vec3 ClearColor;
+		bool DepthTest; 
+	};
+
 	class Renderer {
 	public:
-		Renderer();
+		Renderer(RendererConfig& config);
 		~Renderer();
 
-		void Prepare(Scene& scene);
-		void Render(Scene& scene );
 
-		void Render(Framebuffer* framebuffer, Scene& scene);
+		void Submit(Render3DComponent& renderComponent, TransformComponent& transform); // Collects DrawCommands
+		void Render();	// Draw to screen (usingthe drawCalls 
+	
+		void setCurrentFrameBuffer(const Framebuffer& fb);
+		void setClearColor(const glm::vec3& ClearColor);
+
+	private:
+		Framebuffer m_framebuffer;
+		glm::vec3 m_clearColor;
+		bool m_depthTest;
+		std::vector<DrawCommand> commands;
 	};
 }