luansapelli / learn-opengl-hello-world

This project is a simple triangle rendered on the screen. It is the "hello world" of OpenGL.

Learn OpenGL - Hello World

Introduction

This is a simple project to learn OpenGL. It is based on the LearnOpenGL tutorial. The project is written in C++ and uses the GLFW library for window management and the GLAD library to load OpenGL functions.

I used my own boilerplate code to setup the project. It is available here.

This project is a simple triangle rendered on the screen. It is the "hello world" of OpenGL.

What I learned

• How to setup a project using GLFW and GLAD
• How to create a window and a OpenGL context
• What VBO and VAO are and how to create them
• What is a shader and how to create and use them
• How to render a triangle on the screen

Final result

Exercises

• Try to draw 2 triangles next to each other using glDrawArrays by adding more vertices to your data.
• Now create the same 2 triangles using two different VAOs and VBOs for their data.
• Create two shader programs where the second program uses a different fragment shader that outputs the color yellow; draw both triangles again where one outputs the color yellow.