[ADD] automatic loading of models

src/scenes/in_Game_Scene.cpp

@@ -10,46 +10,73 @@
 #include "../renderEngine/renderer.h"
 #include "../shaders/entity_shader.h"
 #include "../toolbox/toolbox.h"
+#include <deque>
+
+#define MAX_MODEL_DEQUE_SIZE 6 // max amount of models to load at the same time
+#define UPCOMING_MODEL_AMOUNT 4 // how much models should be loaded in front of us
 
 
 namespace scene
 {
-	std::vector<entities::Entity> entities;
-	std::vector<entities::Light> lights;
+	std::deque<entities::Entity> entites;
+	std::deque<entities::Light> lights;
+	entities::Light sun;
+
 	models::RawModel raw_model;
 	models::ModelTexture texture;
-	shaders::EntityShader *shader;
-	shaders::GuiShader *gui_shader;
+	shaders::EntityShader* shader;
+	shaders::GuiShader* gui_shader;
 	entities::Camera camera(glm::vec3(0, 0, 0), glm::vec3(0, 0, 0));
 	std::vector<gui::GuiTexture*> guis;
 
-	
+	models::TexturedModel model;
+
+
 	In_Game_Scene::In_Game_Scene()
 	{
 		shader = new shaders::EntityShader;
-		shader->Init();	
+		shader->Init();
 		render_engine::renderer::Init(*shader);
 
 		gui_shader = new shaders::GuiShader();
 		gui_shader->Init();
 	}
 
+	void load_chunk(int model_pos)
+	{
+		std::cout << "loading model chunk" << std::endl;
+		if (entites.size() >= MAX_MODEL_DEQUE_SIZE)
+		{
+			entites.pop_back();
+		}
+		int z_offset = model_pos * (model.raw_model.model_size.x * 20); // how much "in the distance" we should load the model
+		entites.push_front(entities::Entity(model, glm::vec3(0, -50, -50 - z_offset), glm::vec3(0, 90, 0), 20));
+
+
+	}
+
+
 	scene::Scenes scene::In_Game_Scene::start(GLFWwindow* window)
 	{
 		raw_model = render_engine::LoadObjModel("res/House.obj");
 		texture = { render_engine::loader::LoadTexture("res/Texture.png") };
 		texture.shine_damper = 10;
 		texture.reflectivity = 0;
-		models::TexturedModel model = { raw_model, texture };
-		
-		int z = 0;
+		model = { raw_model, texture };
+
+		/*int z = 0;
+
 		for (int i = 0; i < 5; ++i)
 		{
 			entities.push_back(entities::Entity(model, glm::vec3(0, -50, -50 - z), glm::vec3(0, 90, 0), 20));
 			z += (raw_model.model_size.x * 20);
+		}*/
+		for (int i = 0; i <= UPCOMING_MODEL_AMOUNT; i++)
+		{
+			load_chunk(i);
 		}
 
-		lights.push_back(entities::Light(glm::vec3(0, 1000, -7000), glm::vec3(5, 5, 5)));
+		sun = entities::Light(glm::vec3(0, 1000, -7000), glm::vec3(5, 5, 5));
 		lights.push_back(entities::Light(glm::vec3(0, 0, -30), glm::vec3(2, 0, 2), glm::vec3(0.0001f, 0.0001f, 0.0001f)));
 		lights.push_back(entities::Light(glm::vec3(0, 0, -200), glm::vec3(0, 2, 0), glm::vec3(0.0001f, 0.0001f, 0.0001f)));
 
@@ -58,11 +85,11 @@ namespace scene
 		button.SetHoverTexture(render_engine::loader::LoadTexture("res/Texture.png"));
 		button.SetClickedTexture(render_engine::loader::LoadTexture("res/Mayo.png"));
 		button.SetOnClickAction([]()
-		{
-			std::cout << "I got clicked on!" << std::endl;
-		});
+			{
+				std::cout << "I got clicked on!" << std::endl;
+			});
 		guis.push_back(&button);
-	
+
 
 		while (return_value == scene::Scenes::INGAME)
 		{
@@ -90,9 +117,14 @@ namespace scene
 		shader->LoadViewMatrix(camera);
 
 		// Renders each entity in the entities list
-		for (entities::Entity& entity : entities)
+		/*for (entities::Entity& entity : entities)
 		{
 			render_engine::renderer::Render(entity, *shader);
+		}*/
+
+		for (entities::Entity& model_entity : entites)
+		{
+			render_engine::renderer::Render(model_entity, *shader);
 		}
 
 		// Render GUI items
@@ -105,6 +137,17 @@ namespace scene
 	void scene::In_Game_Scene::update(GLFWwindow* window)
 	{
 		camera.Move(window);
+
+		// calculate where the next house model should be loaded
+		static int last_model_pos = 0;
+		int model_pos = -round(camera.GetPosition().z / (model.raw_model.model_size.x * 20)); // how much models we have passed, minus because we are moving in the negative z axis
+
+		// if we have passed a model, load a new one and delete the one behind us
+		if (last_model_pos != model_pos)
+		{
+			load_chunk(model_pos + UPCOMING_MODEL_AMOUNT);
+		}
+		last_model_pos = model_pos;
 	}
 
 	void scene::In_Game_Scene::onKey(GLFWwindow* window, int key, int scancode, int action, int mods)