derezzed

WIP toy graphics engine

Features

• CMake build system
  • Engine builds as a static library
  • each app has its own CMakeLists.txt that links against the engine
• SDL3 for windowing, input, media, etc.
• Engine/header api-agnostic interfaces
  • OpenGL backend (can add more with some work)
• DOD focus (WIP)
• Demos

Dependencies

• Everything is vendored under vendor/.

Required:

• A C++23 compiler
• CMake 3.21+

Build

Clone:

git clone <repo-url>

Then configure and build with the cmake preset:

# Configure (first time only)
cmake --preset default

# Build everything
cmake --build --preset default

# Or optimized build
cmake --preset default -DCMAKE_BUILD_TYPE=Release && cmake --build --preset default

SDL3 might take a while, should only concern the first build since it's incremental

Each demo executable is placed in build/bin/, with its res/ copied next to it.

Run

./build/bin/Hello/Hello

Demos

Live in the demo/ folder, build and run like above. Use these for testing and for reference on how to build apps.

Writing an App

Implement drz::App and provide a create_app() factory:

psuedo code

#include <drz/core/Engine.hpp>
#include <drz/core/App.hpp>
#include <drz/gfx/Renderer.hpp>

#include <iostream>

class MyApp : public drz::App {
public:
    void init() override {
        std::cout << "Hello World!\n";
    }

    void handle_event(const SDL_Event& event) override {}

    void update(float dt, double elapsed) override {}

    void render(drz::Renderer& renderer) override {}
};

drz::App* create_app() {
    return new MyApp();
}

Add a CMakeLists.txt next to your sources that links the engine (look at a demo's CMakeLists.txt for reference).

Then add it to the build by dropping add_subdirectory(path/to/myapp) into the root CMakeLists.txt.