Custom OpenGL Engine Demo

This project is a graphical scene developed using the EDK API, based on OpenGL.

It started as a way to learn how a renderer fits together, and it has grown into a small playground where I can spawn objects, light them, debug them and walk around an endless world.

These features are being developed with the goal of evolving into a fully custom graphics engine in the future ^^.

The terrain is generated by code instead of being modeled by hand. That means the world can be as big as I want, and I can change how it looks just by changing parameters.

Infinite terrain: as the first-person camera moves, new terrain appears ahead and the one left behind is removed, so the world never ends.

Terrain editor: a set of controls to tweak the generation and see the result right away.

Terrain can also be modified in execution time, there's a list of variables that define the form of the generation. As well as an internal seed system, that is defined at the beginning that makes every execution a different terrain

The Prop Manager is the piece that owns every object in the scene. Instead of hardcoding what gets drawn, props can be created and destroyed at runtime, and each one keeps its own transform and material.

This is what makes the rest of the demo possible: lights, normals and terrain all work on top of the same set of props.

Once a prop exists, you can edit it live:

Lighting is where the scene starts to feel like a 3D world and not just flat shapes. I tested the lights on two different kinds of geometry, because each one shows different things.

On an OBJ model, the light has to deal with imported geometry and its normals. On a sphere, the smooth gradient makes it easy to see if the shading is correct.

When lighting looks wrong, the first thing to check is the normals. To make that easy, the demo can draw them as lines, so I can see exactly where each normal points.

This works in every Gameobject in the scene, obj, props, skybox, and terrain

We also worked on a particle generator. Particles are spawned and assigned a lifespan and a direction. We can also control their spawn rate and direction mode.

Distinguishing between directional particles and explosive particles.

This demo is a stepping stone. The plan is to keep replacing pieces built on top of the EDK API with my own, until it becomes a fully custom graphics engine.

Thanks for reading!