[ADDED] smoke and some small changes

src/entities/Camera.h

@@ -12,7 +12,7 @@ namespace entities
 	class Camera
 	{
 	private:
-		const float SPEED = 0.02f;
+		const float SPEED = 0.52f;
 		
 		glm::vec3 position;
 		glm::vec3 rotation;

src/main.cpp

@@ -46,12 +46,19 @@ int main(void)
     });
 	
 	
-    models::RawModel raw_model = render_engine::LoadObjModel("res/Tree.obj");
-    models::ModelTexture texture = { render_engine::loader::LoadTexture("res/TreeTexture.png") };
+    models::RawModel raw_model = render_engine::LoadObjModel("res/House.obj");
+    models::ModelTexture texture = { render_engine::loader::LoadTexture("res/Texture.png") };
     texture.shine_damper = 10;
-    texture.reflectivity = 1;
+    texture.reflectivity = 0;
     models::TexturedModel model = { raw_model, texture };
-    entities::Entity entity(model, glm::vec3(0, -25, -50), glm::vec3(0, 0, 0), 1);
+
+    std::vector<entities::Entity> entities;
+    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);
+    }
 
     entities::Light light(glm::vec3(0, 0, -30), glm::vec3(1, 1, 1));
 	
@@ -66,16 +73,19 @@ int main(void)
 	{
         // Update
         const double delta = UpdateDelta();
-        entity.IncreaseRotation(glm::vec3(0, 1, 0));
         camera.Move(window);
 
 		// Render
         render_engine::renderer::Prepare();
         shader.Start();
+        shader.LoadSkyColor(render_engine::renderer::SKY_COLOR);
         shader.LoadLight(light);
         shader.LoadViewMatrix(camera);
 		
-        render_engine::renderer::Render(entity, shader);
+		for (entities::Entity& entity : entities)
+		{
+            render_engine::renderer::Render(entity, shader);
+		}
 
 		// Finish up
         shader.Stop();

src/models/Model.h

@@ -15,6 +15,7 @@ namespace models
 	{
 		GLuint vao_id;
 		int vertex_count;
+		glm::vec3 model_size;
 	};
 
 	/*

src/renderEngine/Loader.cpp

@@ -1,7 +1,10 @@
 #include <GL/glew.h>
+#include <glm/vec3.hpp>
 #include "../stb_image.h"
 #include "loader.h"
 
+#include <iostream>
+
 namespace render_engine
 {
 	namespace loader
@@ -9,6 +12,7 @@ namespace render_engine
 		static GLuint CreateVao();
 		static void StoreDataInAttributeList(int attribute_number, int coordinate_size, std::vector<float>& data);
 		static void BindIndicesBuffer(std::vector<unsigned int>& indices);
+		static glm::vec3 GetSizeModel(std::vector<float>& positions);
 
 		static std::vector<GLuint> vaos;
 		static std::vector<GLuint> vbos;
@@ -19,13 +23,16 @@ namespace render_engine
 		*/
 		models::RawModel LoadToVAO(std::vector<float>& positions, std::vector<float>& texture_coords, std::vector<float>& normals, std::vector<unsigned int>& indices)
 		{
-			GLuint vao_id = CreateVao();
+			const GLuint vao_id = CreateVao();
 			BindIndicesBuffer(indices);
 			StoreDataInAttributeList(0, 3, positions);
 			StoreDataInAttributeList(1, 2, texture_coords);
 			StoreDataInAttributeList(2, 3, normals);
 			glBindVertexArray(0);
-			return { vao_id, static_cast<int>(indices.size()) };
+			
+			const glm::vec3 model_size = GetSizeModel(positions);
+			
+			return { vao_id, static_cast<int>(indices.size()), model_size };
 		}
 
 		/*
@@ -41,6 +48,12 @@ namespace render_engine
 			glEnable(GL_TEXTURE_2D);
 			glBindTexture(GL_TEXTURE_2D, texture_id);
 			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imgData);
+
+			// Set mipmapping with a constant LOD
+			glGenerateMipmap(GL_TEXTURE_2D);
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -0.4f);
+
 			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 			
@@ -114,5 +127,67 @@ namespace render_engine
 			glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vbo_id);
 			glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(int) * indices.size(), &indices[0], GL_STATIC_DRAW);
 		}
+
+		static glm::vec3 GetSizeModel(std::vector<float>& positions)
+		{
+			float minX = 100;
+			float maxX = -100;
+
+			float minY = 100;
+			float maxY = -100;
+
+			float minZ = 100;
+			float maxZ = -100;
+			
+			for (int i = 0; i < positions.size(); ++i)
+			{
+				const int index = i % 3;
+				const float value = positions[i];
+				
+				switch (index)
+				{
+				case 0: // x
+					{
+						if (value < minX)
+						{
+							minX = value;
+						} else if (value > maxX)
+						{
+							maxX = value;
+						}
+						break;
+					}
+				case 1: // y
+					{
+						if (value < minY)
+						{
+							minY = value;
+						}
+						else if (value > maxY)
+						{
+							maxY = value;
+						}
+						break;
+					}
+				case 2: // z
+				{
+					if (value < minZ)
+					{
+						minZ = value;
+					}
+					else if (value > maxZ)
+					{
+						maxZ = value;
+					}
+					break;
+				}
+				}
+			}
+
+			const float sizeX = maxX - minX;
+			const float sizeY = maxY - minY;
+			const float sizeZ = maxZ - minZ;
+			return { sizeX, sizeY, sizeZ };
+		}
 	}
 }

src/renderEngine/Renderer.cpp

@@ -37,7 +37,7 @@ namespace render_engine
 		{
 			glEnable(GL_DEPTH_TEST);
 			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-			glClearColor(0.3f, 0.4f, 0.6f, 1.0f);
+			glClearColor(SKY_COLOR.r, SKY_COLOR.g, SKY_COLOR.b, 1.0f);
 		}
 
 		/*

src/renderEngine/Renderer.h

@@ -7,6 +7,8 @@ namespace render_engine
 {
 	namespace renderer
 	{
+		const glm::vec3 SKY_COLOR = { 0.3f, 0.4f, 0.6f };
+		
 		/*
 			Call this function when starting the program
 		 */

src/shaders/entity_shader.cpp

@@ -20,19 +20,25 @@ namespace shaders
 	out vec3 surface_normal;
 	out vec3 to_light_vector;
 	out vec3 to_camera_vector;
+	out float visibility;
 
 	uniform mat4 model_matrix;
 	uniform mat4 projection_matrix;
 	uniform mat4 view_matrix;
 	uniform vec3 light_position;
 
+	const float density = 0.0017;
+	const float gradient = 4;
+	
 	void main(void)
 	{
 		// Calculate the real position of the vertex (after rotation and scaling)
 		vec4 world_position = model_matrix * vec4(position, 1.0);
 
+		vec4 position_rel_to_cam = view_matrix * world_position;
+	
 		// Tell OpenGL where to render the vertex
-		gl_Position = projection_matrix * view_matrix * world_position;
+		gl_Position = projection_matrix * position_rel_to_cam;
 
 		// Pass the textureCoords directly to the fragment shader
 		pass_texture_coords = texture_coords;
@@ -40,6 +46,11 @@ namespace shaders
 		surface_normal = (model_matrix * vec4(normal, 0.0)).xyz;
 		to_light_vector = light_position - world_position.xyz;
 		to_camera_vector = (inverse(view_matrix) * vec4(0.0, 0.0, 0.0, 1.0)).xyz - world_position.xyz;
+
+		// Calculate the density/visibility of the vertex with the fog
+		float distance = length(position_rel_to_cam.xyz);
+		visibility = exp(-pow((distance * density), gradient));
+		visibility = clamp(visibility, 0.0, 1.0);
 	}
 	)";
 	
@@ -55,6 +66,7 @@ namespace shaders
 	in vec3 surface_normal;
 	in vec3 to_light_vector;
 	in vec3 to_camera_vector;
+	in float visibility;
 
 	// Final color of the pixel
 	out vec4 out_color;
@@ -65,6 +77,7 @@ namespace shaders
 	uniform vec3 light_color;
 	uniform float shine_damper;
 	uniform float reflectivity;
+	uniform vec3 sky_color;
 	
 	void main(void)
 	{
@@ -86,6 +99,7 @@ namespace shaders
 		vec3 specular = damped_specular * reflectivity * light_color;
 		
 		out_color = vec4(diffuse, 1.0) * texture(texture_sampler, pass_texture_coords) + vec4(specular, 1.0);
+		out_color = mix(vec4(sky_color, 1.0), out_color, visibility);
 	}
 	)";
 	
@@ -122,6 +136,11 @@ namespace shaders
 		LoadFloat(location_reflectivity, reflectivity);
 	}
 
+	void EntityShader::LoadSkyColor(glm::vec3 sky_color) const
+	{
+		LoadVector(location_sky_color, sky_color);
+	}
+
 	void EntityShader::SetAttributes() const
 	{
 		// Load the position VBO and textureCoords VBO from the VAO into the shader "in" variables
@@ -140,5 +159,6 @@ namespace shaders
 		location_light_color = GetUniformLocation("light_color");
 		location_shine_damper = GetUniformLocation("shine_damper");
 		location_reflectivity = GetUniformLocation("reflectivity");
+		location_sky_color = GetUniformLocation("sky_color");
 	}
 }

src/shaders/entity_shader.h

@@ -21,6 +21,7 @@ namespace shaders
 		GLuint location_light_color;
 		GLuint location_shine_damper;
 		GLuint location_reflectivity;
+		GLuint location_sky_color;
 		
 	public:
 		EntityShader();
@@ -32,6 +33,8 @@ namespace shaders
 		void LoadLight(entities::Light& light) const;
 		void LoadShineVariables(float shine_damper, float reflectivity) const;
 
+		void LoadSkyColor(glm::vec3 sky_color) const;
+			
 	protected:
 		void SetAttributes() const override;
 		void GetAllUniformLocations() override;