Code re-work: model loading

src/2.lighting/5.1.light_casters_directional/light_casters_directional.cpp

@@ -65,8 +65,8 @@ int main()
     // -----------------------------
     glEnable(GL_DEPTH_TEST);
 
-    // build and compile our shader zprogram
-    // ------------------------------------
+    // build and compile shaders
+    // -------------------------
     Shader lightingShader("5.1.light_casters.vs", "5.1.light_casters.fs");
     Shader lampShader("1.lamp.vs", "1.lamp.fs");
 

src/3.model_loading/1.model_loading/1.model_loading.fs

@@ -1,10 +1,11 @@
 #version 330 core
+out vec4 FragColor;
+
 in vec2 TexCoords;
-out vec4 color;
 
 uniform sampler2D texture_diffuse1;
 
 void main()
 {    
-    color = texture(texture_diffuse1, TexCoords);
+    FragColor = texture(texture_diffuse1, TexCoords);
 }

src/3.model_loading/1.model_loading/1.model_loading.vs

@@ -0,0 +1,16 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexCoords;
+
+out vec2 TexCoords;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    TexCoords = aTexCoords;    
+    gl_Position = projection * view * model * vec4(aPos, 1.0f);
+}

src/3.model_loading/1.model_loading/model_loading.cpp

@@ -0,0 +1,181 @@
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#include <stb_image.h>
+
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+#include <learnopengl/filesystem.h>
+#include <learnopengl/shader_m.h>
+#include <learnopengl/camera.h>
+#include <learnopengl/model.h>
+
+#include <iostream>
+
+void framebuffer_size_callback(GLFWwindow* window, int width, int height);
+void mouse_callback(GLFWwindow* window, double xpos, double ypos);
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+void processInput(GLFWwindow *window);
+
+// camera
+Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
+float lastX = 800.0f / 2.0;
+float lastY = 600.0 / 2.0;
+bool firstMouse = true;
+
+float deltaTime = 0.0f;	// time between current frame and last frame
+float lastFrame = 0.0f;
+
+int main()
+{
+    // glfw: initialize and configure
+    // ------------------------------
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    // glfw window creation
+    // --------------------
+    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    glfwMakeContextCurrent(window);
+    if (window == NULL)
+    {
+        std::cout << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return -1;
+    }
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+    glfwSetCursorPosCallback(window, mouse_callback);
+    glfwSetScrollCallback(window, scroll_callback);
+
+    // tell GLFW to capture our mouse
+    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+    // glad: load all OpenGL function pointers
+    // ---------------------------------------
+    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+    {
+        std::cout << "Failed to initialize GLAD" << std::endl;
+        return -1;
+    }
+
+    // configure global opengl state
+    // -----------------------------
+    glEnable(GL_DEPTH_TEST);
+
+    // build and compile shaders
+    // -------------------------
+    Shader ourShader("1.model_loading.vs", "1.model_loading.fs");
+
+    // load models
+    // -----------
+    Model ourModel(FileSystem::getPath("resources/objects/nanosuit/nanosuit.obj"));
+
+    
+    // draw in wireframe
+    //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+    // render loop
+    // -----------
+    while (!glfwWindowShouldClose(window))
+    {
+        // per-frame time logic
+        // --------------------
+        float currentFrame = glfwGetTime();
+        deltaTime = currentFrame - lastFrame;
+        lastFrame = currentFrame;
+
+        // input
+        // -----
+        processInput(window);
+
+        // render
+        // ------
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        // don't forget to enable shader before setting uniforms
+        ourShader.use();
+
+        // view/projection transformations
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 view = camera.GetViewMatrix();
+        ourShader.setMat4("projection", projection);
+        ourShader.setMat4("view", view);
+
+        // render the loaded model
+        glm::mat4 model;
+        model = glm::translate(model, glm::vec3(0.0f, -1.75f, 0.0f)); // translate it down so it's at the center of the scene
+        model = glm::scale(model, glm::vec3(0.2f, 0.2f, 0.2f));	// it's a bit too big for our scene, so scale it down
+        ourShader.setMat4("model", model);
+        ourModel.Draw(ourShader);
+
+
+        // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
+        // -------------------------------------------------------------------------------
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+
+    // glfw: terminate, clearing all previously allocated GLFW resources.
+    // ------------------------------------------------------------------
+    glfwTerminate();
+    return 0;
+}
+
+// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
+// ---------------------------------------------------------------------------------------------------------
+void processInput(GLFWwindow *window)
+{
+    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, true);
+
+    float cameraSpeed = 2.5 * deltaTime;
+    if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
+        camera.ProcessKeyboard(FORWARD, deltaTime);
+    if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
+        camera.ProcessKeyboard(BACKWARD, deltaTime);
+    if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
+        camera.ProcessKeyboard(LEFT, deltaTime);
+    if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
+        camera.ProcessKeyboard(RIGHT, deltaTime);
+}
+
+// glfw: whenever the window size changed (by OS or user resize) this callback function executes
+// ---------------------------------------------------------------------------------------------
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    // make sure the viewport matches the new window dimensions; note that width and 
+    // height will be significantly larger than specified on retina displays.
+    glViewport(0, 0, width, height);
+}
+
+
+// glfw: whenever the mouse moves, this callback is called
+// -------------------------------------------------------
+void mouse_callback(GLFWwindow* window, double xpos, double ypos)
+{
+    if (firstMouse)
+    {
+        lastX = xpos;
+        lastY = ypos;
+        firstMouse = false;
+    }
+
+    float xoffset = xpos - lastX;
+    float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top
+
+    lastX = xpos;
+    lastY = ypos;
+
+    camera.ProcessMouseMovement(xoffset, yoffset);
+}
+
+// glfw: whenever the mouse scroll wheel scrolls, this callback is called
+// ----------------------------------------------------------------------
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+    camera.ProcessMouseScroll(yoffset);
+}

src/3.model_loading/1.model_loading/model_rendered.cpp

@@ -1,172 +0,0 @@
-// 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>
-#include <learnopengl/model.h>
-
-// GLM Mathemtics
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtc/type_ptr.hpp>
-
-// Other Libs
-#include <SOIL.h>
-#include <learnopengl/filesystem.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);
-
-    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 shader("shader.vs", "shader.frag");
-
-    // Load models
-    Model ourModel(FileSystem::getPath("resources/objects/nanosuit/nanosuit.obj").c_str());
-
-    // Draw in wireframe
-    //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-
-    // 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(0.05f, 0.05f, 0.05f, 1.0f);
-        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-        shader.Use();   // <-- Don't forget this one!
-        // Transformation matrices
-        glm::mat4 projection = glm::perspective(camera.Zoom, (float)screenWidth/(float)screenHeight, 0.1f, 100.0f);
-        glm::mat4 view = camera.GetViewMatrix();
-        glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
-        glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
-
-        // Draw the loaded model
-        glm::mat4 model;
-        model = glm::translate(model, glm::vec3(0.0f, -1.75f, 0.0f)); // Translate it down a bit so it's at the center of the scene
-        model = glm::scale(model, glm::vec3(0.2f, 0.2f, 0.2f));	// It's a bit too big for our scene, so scale it down
-        glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
-        ourModel.Draw(shader);       
-
-        // Swap the buffers
-        glfwSwapBuffers(window);
-    }
-
-    glfwTerminate();
-    return 0;
-}
-
-#pragma region "User input"
-
-// 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)
-{
-    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; 
-    
-    lastX = xpos;
-    lastY = ypos;
-
-    camera.ProcessMouseMovement(xoffset, yoffset);
-}	
-
-void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
-{
-    camera.ProcessMouseScroll(yoffset);
-}
-
-#pragma endregion

src/3.model_loading/1.model_loading/shader.vs

@@ -1,16 +0,0 @@
-#version 330 core
-layout (location = 0) in vec3 position;
-// layout (location = 1) in vec3 normal;
-layout (location = 2) in vec2 texCoords;
-
-out vec2 TexCoords;
-
-uniform mat4 model;
-uniform mat4 view;
-uniform mat4 projection;
-
-void main()
-{
-    gl_Position = projection * view * model * vec4(position, 1.0f);
-    TexCoords = texCoords;
-}