Initial commit, all code samples with working CMake script for VS/Windows.

src/1.getting_started/1.hello_window/hellowindow2.cpp

@@ -0,0 +1,80 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    std::cout << "Starting GLFW context, OpenGL 3.3" << std::endl;
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+    if (window == NULL)
+    {
+        std::cout << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return -1;
+    }
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    if (glewInit() != GLEW_OK)
+    {
+        std::cout << "Failed to initialize GLEW" << std::endl;
+        return -1;
+    }    
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    std::cout << key << std::endl;
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/1.hello_window/shader.frag

@@ -0,0 +1 @@
+swag_frag

src/1.getting_started/1.hello_window/shader.vs

@@ -0,0 +1 @@
+swag

src/1.getting_started/2.hello_triangle/hellotriangle2.cpp

@@ -0,0 +1,179 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// Shaders
+const GLchar* vertexShaderSource = "#version 330 core\n"
+    "layout (location = 0) in vec3 position;\n"
+    "void main()\n"
+    "{\n"
+    "gl_Position = vec4(position.x, position.y, position.z, 1.0);\n"
+    "}\0";
+const GLchar* fragmentShaderSource = "#version 330 core\n"
+    "out vec4 color;\n"
+    "void main()\n"
+    "{\n"
+    "color = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+    "}\n\0";
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    std::cout << "Starting GLFW context, OpenGL 3.3" << std::endl;
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+
+    // Build and compile our shader program
+    // Vertex shader
+    GLint vertexShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
+    glCompileShader(vertexShader);
+    // Check for compile time errors
+    GLint success;
+    GLchar infoLog[512];
+    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
+    if (!success)
+    {
+        glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+        std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" << infoLog << std::endl;
+    }
+    // Fragment shader
+    GLint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+    glCompileShader(fragmentShader);
+    // Check for compile time errors
+    glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
+    if (!success)
+    {
+        glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+        std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n" << infoLog << std::endl;
+    }
+    // Link shaders
+    GLint shaderProgram = glCreateProgram();
+    glAttachShader(shaderProgram, vertexShader);
+    glAttachShader(shaderProgram, fragmentShader);
+    glLinkProgram(shaderProgram);
+    // Check for linking errors
+    glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+    if (!success) {
+        glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+        std::cout << "ERROR::SHADER::PROGRAM::LINKING_FAILED\n" << infoLog << std::endl;
+    }
+    glDeleteShader(vertexShader);
+    glDeleteShader(fragmentShader);
+
+
+    // Set up vertex data (and buffer(s)) and attribute pointers
+    //GLfloat vertices[] = {
+    //  // First triangle
+    //   0.5f,  0.5f,  // Top Right
+    //   0.5f, -0.5f,  // Bottom Right
+    //  -0.5f,  0.5f,  // Top Left 
+    //  // Second triangle
+    //   0.5f, -0.5f,  // Bottom Right
+    //  -0.5f, -0.5f,  // Bottom Left
+    //  -0.5f,  0.5f   // Top Left
+    //}; 
+    GLfloat vertices[] = {
+         0.5f,  0.5f, 0.0f,  // Top Right
+         0.5f, -0.5f, 0.0f,  // Bottom Right
+        -0.5f, -0.5f, 0.0f,  // Bottom Left
+        -0.5f,  0.5f, 0.0f   // Top Left 
+    };
+    GLuint indices[] = {  // Note that we start from 0!
+        0, 1, 3,  // First Triangle
+        1, 2, 3   // Second Triangle
+    };
+    GLuint VBO, VAO, EBO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    glGenBuffers(1, &EBO);
+    // Bind the Vertex Array Object first, then bind and set vertex buffer(s) and attribute pointer(s).
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+
+    glBindBuffer(GL_ARRAY_BUFFER, 0); // Note that this is allowed, the call to glVertexAttribPointer registered VBO as the currently bound vertex buffer object so afterwards we can safely unbind
+
+    glBindVertexArray(0); // Unbind VAO (it's always a good thing to unbind any buffer/array to prevent strange bugs), remember: do NOT unbind the EBO, keep it bound to this VAO
+
+
+    // Uncommenting this call will result in wireframe polygons.
+    //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        // Draw our first triangle
+        glUseProgram(shaderProgram);
+        glBindVertexArray(VAO);
+        //glDrawArrays(GL_TRIANGLES, 0, 6);
+        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+        glBindVertexArray(0);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    glDeleteBuffers(1, &EBO);
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/3.shaders/basic.frag

@@ -0,0 +1,9 @@
+#version 330 core
+in vec3 ourColor;
+
+out vec4 color;
+
+void main()
+{
+    color = vec4(ourColor, 1.0f);
+}

src/1.getting_started/3.shaders/basic.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec3 color;
+
+out vec3 ourColor;
+
+void main()
+{
+    gl_Position = vec4(position, 1.0f);
+    ourColor = color;
+}

src/1.getting_started/3.shaders/shaders-using-object.cpp

@@ -0,0 +1,110 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+// Other includes
+#include <learnopengl/shader.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+
+    // Build and compile our shader program
+    Shader ourShader("basic.vs", "basic.frag");
+
+
+    // Set up vertex data (and buffer(s)) and attribute pointers
+    GLfloat vertices[] = {
+        // Positions         // Colors
+        0.5f, -0.5f, 0.0f,   1.0f, 0.0f, 0.0f,  // Bottom Right
+       -0.5f, -0.5f, 0.0f,   0.0f, 1.0f, 0.0f,  // Bottom Left
+        0.0f,  0.5f, 0.0f,   0.0f, 0.0f, 1.0f   // Top 
+    };
+    GLuint VBO, VAO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    // Bind the Vertex Array Object first, then bind and set vertex buffer(s) and attribute pointer(s).
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    // Position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+    // Color attribute
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(1);
+
+    glBindVertexArray(0); // Unbind VAO
+
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        // Draw the triangle
+        ourShader.Use();
+        glBindVertexArray(VAO);
+        glDrawArrays(GL_TRIANGLES, 0, 3);
+        glBindVertexArray(0);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/4.textures/texture.frag

@@ -0,0 +1,15 @@
+#version 330 core
+in vec3 ourColor;
+in vec2 TexCoord;
+
+out vec4 color;
+
+// Texture samplers
+uniform sampler2D ourTexture1;
+uniform sampler2D ourTexture2;
+
+void main()
+{
+	// Linearly interpolate between both textures (second texture is only slightly combined)
+	color = mix(texture(ourTexture1, TexCoord), texture(ourTexture2, TexCoord), 0.2);
+}

src/1.getting_started/4.textures/texture.vs

@@ -0,0 +1,16 @@
+#version 330 core
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec3 color;
+layout (location = 2) in vec2 texCoord;
+
+out vec3 ourColor;
+out vec2 TexCoord;
+
+void main()
+{
+	gl_Position = vec4(position, 1.0f);
+	ourColor = color;
+	// We swap the y-axis by substracing our coordinates from 1. This is done because most images have the top y-axis inversed with OpenGL's top y-axis.
+	// TexCoord = texCoord;
+	TexCoord = vec2(texCoord.x, 1.0 - texCoord.y);
+}

src/1.getting_started/4.textures/textures_combined.cpp

@@ -0,0 +1,177 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+// Other Libs
+#include <SOIL.h>
+
+// Other includes
+#include <learnopengl/shader.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+
+    // Build and compile our shader program
+    Shader ourShader("texture.vs", "texture.frag");
+
+
+    // Set up vertex data (and buffer(s)) and attribute pointers
+    GLfloat vertices[] = {
+        // Positions          // Colors           // Texture Coords
+         0.5f,  0.5f, 0.0f,   1.0f, 0.0f, 0.0f,   1.0f, 1.0f, // Top Right
+         0.5f, -0.5f, 0.0f,   0.0f, 1.0f, 0.0f,   1.0f, 0.0f, // Bottom Right
+        -0.5f, -0.5f, 0.0f,   0.0f, 0.0f, 1.0f,   0.0f, 0.0f, // Bottom Left
+        -0.5f,  0.5f, 0.0f,   1.0f, 1.0f, 0.0f,   0.0f, 1.0f  // Top Left 
+    };
+    GLuint indices[] = {  // Note that we start from 0!
+        0, 1, 3, // First Triangle
+        1, 2, 3  // Second Triangle
+    };
+    GLuint VBO, VAO, EBO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    glGenBuffers(1, &EBO);
+
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
+
+    // Position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+    // Color attribute
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(1);
+    // TexCoord attribute
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(2);
+
+    glBindVertexArray(0); // Unbind VAO
+
+
+    // Load and create a texture 
+    GLuint texture1;
+    GLuint texture2;
+    // ====================
+    // Texture 1
+    // ====================
+    glGenTextures(1, &texture1);
+    glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);	// Set texture wrapping to GL_REPEAT
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    int width, height;
+    unsigned char* image = SOIL_load_image("../../../resources/textures/container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
+    // ===================
+    // Texture 2
+    // ===================
+    glGenTextures(1, &texture2);
+    glBindTexture(GL_TEXTURE_2D, texture2);
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    image = SOIL_load_image("../../../resources/textures/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+
+        // Bind Textures using texture units
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, texture1);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture1"), 0);
+        glActiveTexture(GL_TEXTURE1);
+        glBindTexture(GL_TEXTURE_2D, texture2);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture2"), 1);
+
+        // Activate shader
+        ourShader.Use();       
+        
+        // Draw container
+        glBindVertexArray(VAO);
+        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+        glBindVertexArray(0);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    glDeleteBuffers(1, &EBO);
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/5.transformations/transform.frag

@@ -0,0 +1,12 @@
+#version 330 core
+in vec2 TexCoord;
+
+out vec4 color;
+
+uniform sampler2D ourTexture1;
+uniform sampler2D ourTexture2;
+
+void main()
+{
+    color = mix(texture(ourTexture1, TexCoord), texture(ourTexture2, TexCoord), 0.2);
+}

src/1.getting_started/5.transformations/transform.vs

@@ -0,0 +1,13 @@
+#version 330 core
+layout (location = 0) in vec3 position;
+layout (location = 2) in vec2 texCoord;
+
+out vec2 TexCoord;
+
+uniform mat4 transform;
+
+void main()
+{
+    gl_Position = transform * vec4(position, 1.0f);
+    TexCoord = vec2(texCoord.x, 1.0 - texCoord.y);
+}

src/1.getting_started/5.transformations/transformations.cpp

@@ -0,0 +1,190 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+// Other Libs
+#include <SOIL.h>
+// GLM Mathematics
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+// Other includes
+#include <learnopengl/shader.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+
+    // Build and compile our shader program
+    Shader ourShader("transform.vs", "transform.frag");
+
+
+    // Set up vertex data (and buffer(s)) and attribute pointers
+    GLfloat vertices[] = {
+        // Positions          // Colors           // Texture Coords
+         0.5f,  0.5f, 0.0f,   1.0f, 0.0f, 0.0f,   1.0f, 1.0f, // Top Right
+         0.5f, -0.5f, 0.0f,   0.0f, 1.0f, 0.0f,   1.0f, 0.0f, // Bottom Right
+        -0.5f, -0.5f, 0.0f,   0.0f, 0.0f, 1.0f,   0.0f, 0.0f, // Bottom Left
+        -0.5f,  0.5f, 0.0f,   1.0f, 1.0f, 0.0f,   0.0f, 1.0f  // Top Left 
+    };
+    GLuint indices[] = {  // Note that we start from 0!
+        0, 1, 3, // First Triangle
+        1, 2, 3  // Second Triangle
+    };
+    GLuint VBO, VAO, EBO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    glGenBuffers(1, &EBO);
+
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
+
+    // Position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+    // Color attribute
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(1);
+    // TexCoord attribute
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(2);
+
+    glBindVertexArray(0); // Unbind VAO
+
+
+    // Load and create a texture 
+    GLuint texture1;
+    GLuint texture2;
+    // ====================
+    // Texture 1
+    // ====================
+    glGenTextures(1, &texture1);
+    glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);	// Set texture wrapping to GL_REPEAT
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    int width, height;
+    unsigned char* image = SOIL_load_image("../../../resources/textures/container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
+    // ===================
+    // Texture 2
+    // ===================
+    glGenTextures(1, &texture2);
+    glBindTexture(GL_TEXTURE_2D, texture2);
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    image = SOIL_load_image("../../../resources/textures/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+
+        // Bind Textures using texture units
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, texture1);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture1"), 0);
+        glActiveTexture(GL_TEXTURE1);
+        glBindTexture(GL_TEXTURE_2D, texture2);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture2"), 1);
+
+        // Activate shader
+        ourShader.Use();       
+
+        // Create transformations
+        glm::mat4 transform;
+        transform = glm::translate(transform, glm::vec3(0.5f, -0.5f, 0.0f));
+        transform = glm::rotate(transform, (GLfloat)glfwGetTime() * 50.0f, glm::vec3(0.0f, 0.0f, 1.0f));
+
+        // Get matrix's uniform location and set matrix
+        GLint transformLoc = glGetUniformLocation(ourShader.Program, "transform");
+        glUniformMatrix4fv(transformLoc, 1, GL_FALSE, glm::value_ptr(transform));
+        
+        // Draw container
+        glBindVertexArray(VAO);
+        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+        glBindVertexArray(0);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    glDeleteBuffers(1, &EBO);
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/6.coordinate_systems/coordinate_systems.frag

@@ -0,0 +1,12 @@
+#version 330 core
+in vec2 TexCoord;
+
+out vec4 color;
+
+uniform sampler2D ourTexture1;
+uniform sampler2D ourTexture2;
+
+void main()
+{
+    color = mix(texture(ourTexture1, TexCoord), texture(ourTexture2, TexCoord), 0.2);
+}

src/1.getting_started/6.coordinate_systems/coordinate_systems.vs

@@ -0,0 +1,15 @@
+#version 330 core
+layout (location = 0) in vec3 position;
+layout (location = 2) in vec2 texCoord;
+
+out vec2 TexCoord;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(position, 1.0f);
+    TexCoord = vec2(texCoord.x, 1.0 - texCoord.y);
+}

src/1.getting_started/6.coordinate_systems/coordinate_systems_multiple_objects.cpp

@@ -0,0 +1,244 @@
+#include <iostream>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+// Other Libs
+#include <SOIL.h>
+// GLM Mathematics
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+// Other includes
+#include <learnopengl/shader.h>
+
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+
+// Window dimensions
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+// The MAIN function, from here we start the application and run the game loop
+int main()
+{
+    // Init GLFW
+    glfwInit();
+    // Set all the required options for GLFW
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+
+    // Create a GLFWwindow object that we can use for GLFW's functions
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+
+    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
+    glewExperimental = GL_TRUE;
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, WIDTH, HEIGHT);
+
+    // Setup OpenGL options
+    glEnable(GL_DEPTH_TEST);
+
+
+    // Build and compile our shader program
+    Shader ourShader("coordinate_systems.vs", "coordinate_systems.frag");
+
+
+    // Set up vertex data (and buffer(s)) and attribute pointers
+    GLfloat vertices[] = {
+        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+         0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+        -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+
+        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
+    };
+    // World space positions of our cubes
+    glm::vec3 cubePositions[] = {
+        glm::vec3( 0.0f,  0.0f,  0.0f),
+        glm::vec3( 2.0f,  5.0f, -15.0f),
+        glm::vec3(-1.5f, -2.2f, -2.5f),
+        glm::vec3(-3.8f, -2.0f, -12.3f),
+        glm::vec3( 2.4f, -0.4f, -3.5f),
+        glm::vec3(-1.7f,  3.0f, -7.5f),
+        glm::vec3( 1.3f, -2.0f, -2.5f),
+        glm::vec3( 1.5f,  2.0f, -2.5f),
+        glm::vec3( 1.5f,  0.2f, -1.5f),
+        glm::vec3(-1.3f,  1.0f, -1.5f)
+    };
+    GLuint VBO, VAO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    // Position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+    // TexCoord attribute
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(2);
+
+    glBindVertexArray(0); // Unbind VAO
+
+
+    // Load and create a texture 
+    GLuint texture1;
+    GLuint texture2;
+    // ====================
+    // Texture 1
+    // ====================
+    glGenTextures(1, &texture1);
+    glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);	// Set texture wrapping to GL_REPEAT
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    int width, height;
+    unsigned char* image = SOIL_load_image("../../../resources/textures/container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
+    // ===================
+    // Texture 2
+    // ===================
+    glGenTextures(1, &texture2);
+    glBindTexture(GL_TEXTURE_2D, texture2);
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    image = SOIL_load_image("../../../resources/textures/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+
+    // Game loop
+    while (!glfwWindowShouldClose(window))
+    {
+        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
+        glfwPollEvents();
+
+        // Render
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+
+        // Bind Textures using texture units
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, texture1);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture1"), 0);
+        glActiveTexture(GL_TEXTURE1);
+        glBindTexture(GL_TEXTURE_2D, texture2);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture2"), 1);
+
+        // Activate shader
+        ourShader.Use();
+
+        // Create transformations
+        glm::mat4 view;
+        glm::mat4 projection;
+        view = glm::translate(view, glm::vec3(0.0f, 0.0f, -3.0f));
+        projection = glm::perspective(45.0f, (GLfloat)WIDTH / (GLfloat)HEIGHT, 0.1f, 100.0f);
+        // Get their uniform location
+        GLint modelLoc = glGetUniformLocation(ourShader.Program, "model");
+        GLint viewLoc = glGetUniformLocation(ourShader.Program, "view");
+        GLint projLoc = glGetUniformLocation(ourShader.Program, "projection");
+        // Pass the matrices to the shader
+        glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
+        // Note: currently we set the projection matrix each frame, but since the projection matrix rarely changes it's often best practice to set it outside the main loop only once.
+        glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
+
+        glBindVertexArray(VAO);
+        for (GLuint i = 0; i < 10; i++)
+        {
+            // Calculate the model matrix for each object and pass it to shader before drawing
+            glm::mat4 model;
+            model = glm::translate(model, cubePositions[i]);
+            GLfloat angle = 20.0f * i;
+            model = glm::rotate(model, angle, glm::vec3(1.0f, 0.3f, 0.5f));
+            glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
+
+            glDrawArrays(GL_TRIANGLES, 0, 36);
+        }
+        glBindVertexArray(0);
+
+        // Swap the screen buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    // Terminate GLFW, clearing any resources allocated by GLFW.
+    glfwTerminate();
+    return 0;
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}

src/1.getting_started/7.camera/camera_with_class.cpp

@@ -0,0 +1,298 @@
+// Std. Includes
+#include <string>
+
+// GLEW
+#define GLEW_STATIC
+#include <GL/glew.h>
+
+// GLFW
+#include <GLFW/glfw3.h>
+
+// GL includes
+#include <learnopengl/shader.h>
+#include <learnopengl/camera.h>
+
+// GLM Mathemtics
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+// Other Libs
+#include <SOIL.h>
+
+// Properties
+GLuint screenWidth = 800, screenHeight = 600;
+
+// Function prototypes
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+void mouse_callback(GLFWwindow* window, double xpos, double ypos);
+void Do_Movement();
+
+// Camera
+Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
+bool keys[1024];
+GLfloat lastX = 400, lastY = 300;
+bool firstMouse = true;
+
+GLfloat deltaTime = 0.0f;
+GLfloat lastFrame = 0.0f;
+
+// The MAIN function, from here we start our application and run our Game loop
+int main()
+{
+    // Init GLFW
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+    glfwWindowHint(GLFW_SAMPLES, 4);
+
+    GLFWwindow* window = glfwCreateWindow(screenWidth, screenHeight, "LearnOpenGL", nullptr, nullptr); // Windowed
+    glfwMakeContextCurrent(window);
+
+    // Set the required callback functions
+    glfwSetKeyCallback(window, key_callback);
+    glfwSetCursorPosCallback(window, mouse_callback);
+    glfwSetScrollCallback(window, scroll_callback);
+
+    // Options
+    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+    // Initialize GLEW to setup the OpenGL Function pointers
+    glewExperimental = GL_TRUE;
+    glewInit();
+
+    // Define the viewport dimensions
+    glViewport(0, 0, screenWidth, screenHeight);
+
+    // Setup some OpenGL options
+    glEnable(GL_DEPTH_TEST);
+
+    // Setup and compile our shaders
+    Shader ourShader("coordinate_systems.vs", "coordinate_systems.frag");
+
+    // Set up our vertex data (and buffer(s)) and attribute pointers
+    GLfloat vertices[] = {
+        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+         0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+        -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+
+        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+         0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+        -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
+        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
+    };
+    glm::vec3 cubePositions[] = {
+        glm::vec3(0.0f, 0.0f, 0.0f), 
+        glm::vec3(2.0f, 5.0f, -15.0f), 
+        glm::vec3(-1.5f, -2.2f, -2.5f),  
+        glm::vec3(-3.8f, -2.0f, -12.3f),  
+        glm::vec3(2.4f, -0.4f, -3.5f),  
+        glm::vec3(-1.7f, 3.0f, -7.5f),  
+        glm::vec3(1.3f, -2.0f, -2.5f),  
+        glm::vec3(1.5f, 2.0f, -2.5f), 
+        glm::vec3(1.5f, 0.2f, -1.5f), 
+        glm::vec3(-1.3f, 1.0f, -1.5f)  
+    };
+
+    GLuint VBO, VAO;
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    // Bind our Vertex Array Object first, then bind and set our buffers and pointers.
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+    // Position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0);
+    glEnableVertexAttribArray(0);
+    // TexCoord attribute
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
+    glEnableVertexAttribArray(2);
+
+    glBindVertexArray(0); // Unbind VAO
+
+    // Load and create a texture 
+    GLuint texture1;
+    GLuint texture2;
+    // --== TEXTURE 1 == --
+    glGenTextures(1, &texture1);
+    glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    int width, height;
+    unsigned char* image = SOIL_load_image("../../../resources/textures/container.jpg", &width, &height, 0, SOIL_LOAD_RGB); 
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
+    // --== TEXTURE 2 == --
+    glGenTextures(1, &texture2);
+    glBindTexture(GL_TEXTURE_2D, texture2); 
+    // Set our texture parameters
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);	
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    // Set texture filtering
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // Load, create texture and generate mipmaps
+    image = SOIL_load_image("../../../resources/textures/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB); 
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    SOIL_free_image_data(image);
+    glBindTexture(GL_TEXTURE_2D, 0); 
+    
+    // Game loop
+    while(!glfwWindowShouldClose(window))
+    {
+        // Set frame time
+        GLfloat currentFrame = glfwGetTime();
+        deltaTime = currentFrame - lastFrame;
+        lastFrame = currentFrame;
+
+        // Check and call events
+        glfwPollEvents();
+        Do_Movement();
+
+        // Clear the colorbuffer
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        // Draw our first triangle
+        ourShader.Use();
+
+        // Bind Textures using texture units
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, texture1);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture1"), 0);
+        glActiveTexture(GL_TEXTURE1);
+        glBindTexture(GL_TEXTURE_2D, texture2);
+        glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture2"), 1);
+        
+        // Create camera transformation
+        glm::mat4 view;
+        view = camera.GetViewMatrix();
+        glm::mat4 projection;	
+        projection = glm::perspective(camera.Zoom, (float)screenWidth/(float)screenHeight, 0.1f, 1000.0f);
+        // Get the uniform locations
+        GLint modelLoc = glGetUniformLocation(ourShader.Program, "model");
+        GLint viewLoc = glGetUniformLocation(ourShader.Program, "view");
+        GLint projLoc = glGetUniformLocation(ourShader.Program, "projection");
+        // Pass the matrices to the shader
+        glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
+        glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
+        
+        glBindVertexArray(VAO);
+        for(GLuint i = 0; i < 10; i++)
+        {
+            // Calculate the model matrix for each object and pass it to shader before drawing
+            glm::mat4 model;
+            model = glm::translate(model, cubePositions[i]);
+            GLfloat angle = 20.0f * i; 
+            model = glm::rotate(model, angle, glm::vec3(1.0f, 0.3f, 0.5f));
+            glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
+
+            glDrawArrays(GL_TRIANGLES, 0, 36);			
+        }
+        glBindVertexArray(0);
+        // Swap the buffers
+        glfwSwapBuffers(window);
+    }
+    // Properly de-allocate all resources once they've outlived their purpose
+    glDeleteVertexArrays(1, &VAO);
+    glDeleteBuffers(1, &VBO);
+    glfwTerminate();
+    return 0;
+}
+
+// Moves/alters the camera positions based on user input
+void Do_Movement()
+{
+    // Camera controls
+    if(keys[GLFW_KEY_W])
+        camera.ProcessKeyboard(FORWARD, deltaTime);
+    if(keys[GLFW_KEY_S])
+        camera.ProcessKeyboard(BACKWARD, deltaTime);
+    if(keys[GLFW_KEY_A])
+        camera.ProcessKeyboard(LEFT, deltaTime);
+    if(keys[GLFW_KEY_D])
+        camera.ProcessKeyboard(RIGHT, deltaTime);
+}
+
+// Is called whenever a key is pressed/released via GLFW
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
+{
+    //cout << key << endl;
+    if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+
+    if(action == GLFW_PRESS)
+        keys[key] = true;
+    else if(action == GLFW_RELEASE)
+        keys[key] = false;	
+}
+
+void mouse_callback(GLFWwindow* window, double xpos, double ypos)
+{
+    if(firstMouse)
+    {
+        lastX = xpos;
+        lastY = ypos;
+        firstMouse = false;
+    }
+
+    GLfloat xoffset = xpos - lastX;
+    GLfloat yoffset = lastY - ypos;  // Reversed since y-coordinates go from bottom to left
+    
+    lastX = xpos;
+    lastY = ypos;
+
+    camera.ProcessMouseMovement(xoffset, yoffset);
+}	
+
+
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+    camera.ProcessMouseScroll(yoffset);
+}

src/1.getting_started/7.camera/coordinate_systems.frag

@@ -0,0 +1,12 @@
+#version 330 core
+in vec2 TexCoord;
+
+out vec4 color;
+
+uniform sampler2D ourTexture1;
+uniform sampler2D ourTexture2;
+
+void main()
+{
+    color = mix(texture(ourTexture1, TexCoord), texture(ourTexture2, TexCoord), 0.2);
+}

src/1.getting_started/7.camera/coordinate_systems.vs

@@ -0,0 +1,15 @@
+#version 330 core
+layout (location = 0) in vec3 position;
+layout (location = 2) in vec2 texCoord;
+
+out vec2 TexCoord;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(position, 1.0f);
+    TexCoord = vec2(texCoord.x, 1.0 - texCoord.y);
+}