scop is a small project in the 42 cursus that introduces us to the world of 3D rendering. Essentially, the following is required:

• Parse a .obj file and display it in perspective.
• Be able to apply textures to the object at the press of a key, with a smooth transition.
• No libraries to load the object, make the matrices, load shaders, textures...
• External libraries are only allowed to handle the window and the events (glfw...).

I overdid it a little. For fun and to explore 3D rendering, I added the following features as bonuses:

• Blinn-Phong lighting model: ambient, diffuse and specular lighting.
• Wavefront material support: load material properties and textures from file.
• Rendering an object that has multiple materials.
• Face-normals and vertex-normals visualization.
• Normal maps support: bump/map_bump directive in .mtl file.
• Wireframe mode.
• Light source in world that can be moved freely.
• FPS-style camera controls that are roll-stabilized, for natural movement.
• Cross-platform support (didn't have to do much, thanks Odin!).

This was my first time using a 3D API like OpenGL. I also used this project to try out Odin, since it looked like an interesting language and a good fit. tl;dr: Odin is great, and I'll use it again!

• WASD: Move camera horizontally
• ←↑↓→: Pan camera
• Space/Shift: Move camera up/down
• Z/X: Increase/decrease FOV
• R: Toggle rotation
• T: Toggle textures
• F: Move light to current position
• Tab: Toggle wireframe
• N: Show vertex normal vectors, if they are present
• </>: Adjust size of vertex normal vectors
• 1/2/3/4: Change active shader:
  1. Default shader
  2. Face-normals shader
  3. Vertex-normals shader
  4. For testing purposes (transparency shader)

You need Odin installed. Then, just run the build script for your platform (build.sh/build.bat).

This project was last built for and with Odin release dev-2025-02.