SlopEngine ScrapEngine

Apple-only C++23 graphics and physics engine. Main app uses Metal. Scene/editor code is still mixed between newer Metal work and older Vulkan-era code.

features:

• ECS-style scene and components
• forward PBR rendering
• image-based lighting and skybox
• XPBD rigid body and cloth physics
• Dear ImGui debug UI
• glTF scene loading

Platforms

• macOS
• iOS

Build

Needs:

• CMake 3.30+
• vcpkg
• slangc on PATH

Example:

export VCPKG_ROOT=/path/to/vcpkg
cmake -S . -B build \
  -DCMAKE_TOOLCHAIN_FILE="$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake" \
  -DVCPKG_INSTALLED_DIR="$PWD/build/vcpkg_installed" \
  -DVCPKG_TARGET_TRIPLET=arm64-osx
cmake --build build --target ScrapEngine

Run

./build/ScrapEngine.app/Contents/MacOS/ScrapEngine \
  --ibl path/to/sky.hdr \
  path/to/scene.gltf

Run --help for the rest of the flags.

Repo layout

• src/app/ app, scene, components, platform code
• src/gpu/metal/ Metal renderer, IBL, presentation
• src/physics/ XPBD physics
• src/launcher/ launcher and CLI
• shaders/ shader sources
• assets/ bundled assets

Notes

• This project started from SauceEngine but has been rewritten a lot.
• src/editor/ and some Vulkan-era files are still in the repo, but they are not the main path right now.

License

See LICENSE if present.