Got libraries installed and started working the boilerplate code. This code currently sucks, but it is more to make sure everything is working before I put a bunch of time into making a good system.

README.md

@@ -1,3 +1,5 @@
 # learn-opengl
 
-I want to learn more about opengl, so here we go
+I want to learn more about opengl, so here we go.
+
+Learning from https://learnopengl.com

learn-opengl.code-workspace

@@ -0,0 +1,8 @@
+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings": {}
+}

learning.cpp

@@ -0,0 +1,112 @@
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+const char *VERTEX_SHADER = "#version 330 core\n"
+    "layout (location = 0) in vec3 aPos;\n"
+    "void main(){\n"
+    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+    "}\0";
+const char *FRAG_SHADER = "#version 330 core\n"
+    "out vec4 FragColor;\n"
+    "void main(){\n"
+    "FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+    "}\0";
+
+void resizeWindow(GLFWwindow *window, int width, int height){
+    glViewport(0, 0, width, height);
+}
+
+void processInput(GLFWwindow *window){
+    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS){
+        glfwSetWindowShouldClose(window, true);
+    }
+}
+
+int main(){
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    GLFWwindow* window = glfwCreateWindow(800, 600, "Learning OpenGL", NULL, NULL);
+    if (window == NULL){
+        write(1, "Failed to create GLFW window\n", 29);
+        glfwTerminate();
+        return -1;
+    }
+    glfwMakeContextCurrent(window);
+    if (!gladLoadGLLoader((GLADloadproc) glfwGetProcAddress)){
+        write(1, "Failed to initialize GLAD\n", 26);
+        return -1;
+    }
+
+    glViewport(0, 0, 800, 600);
+    glfwSetFramebufferSizeCallback(window, resizeWindow);
+
+    float vertices[] = {
+        -0.5f, -0.5f, 0.0f,
+        0.5f, -0.5f, 0.0f,
+        0.0f,  0.5f, 0.0f
+    };
+    unsigned int VBO;
+    glGenBuffers(1, &VBO);
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+    
+    unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertexShader, 1, &VERTEX_SHADER, NULL);
+    glCompileShader(vertexShader);
+    int success;
+    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
+    if (!success){
+        char infoLog[512];
+        glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+        std::cout << "ERROR: Vertex shader compilation failed\n" << infoLog;
+    }
+
+    unsigned int fragmentShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(fragmentShader, 1, &FRAG_SHADER, NULL);
+    glCompileShader(fragmentShader);
+    glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
+    if (!success){
+        char infoLog[512];
+        glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+        std::cout << "ERROR: Fragment shader compilation failed\n" << infoLog;
+    }
+
+    unsigned int shader;
+    shader = glCreateProgram();
+    glAttachShader(shader, vertexShader);
+    glAttachShader(shader, fragmentShader);
+    glLinkProgram(shader);
+    glGetProgramiv(shader, GL_LINK_STATUS, &success);
+    if (!success){
+        char infoLog[512];
+        glGetProgramInfoLog(shader, 512, NULL, infoLog);
+        std::cout << "ERROR: Failed to link shader\n" << infoLog;
+    }
+    glDeleteShader(vertexShader);
+    glDeleteShader(fragmentShader);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+    glEnableVertexAttribArray(0);
+
+    while (!glfwWindowShouldClose(window)){
+        processInput(window);
+
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+
+    glfwTerminate();
+    return 0;
+}

makefile

@@ -0,0 +1,4 @@
+all:
+	gcc -Wall learning.cpp -o learning lib/glad.o -lglfw -lGL -lX11 -lpthread -lXrandr -lXi -ldl
+clean:
+	rm -f learning

shaders/default.frag

@@ -0,0 +1,6 @@
+#version 330 core
+out vec4 FragColor;
+
+void main(){
+    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+} 

shaders/default.vert

@@ -0,0 +1,6 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+void main(){
+    gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}