ragekit

A C++20 library for reading and writing the files of Grand Theft Auto V (the RAGE engine), Legacy and Enhanced: models, textures, collision, map files, meta and PSO data, audio data and RPF archives. Every format is a plain struct; the two dependencies, miniz (public domain) and Clipper2 (Boost licence), are vendored; nothing ties it to any particular tool.

ragekit is not affiliated with or endorsed by Rockstar Games or Take-Two Interactive. It contains no game data: you work on files from your own copy of the game.

include/ragekit/   the public headers (ragekit.h includes them all)
src/               the library
examples/          small complete programs
docs/              how to use it, and what is known about the formats
tools/             rk, the command line tool, and the generators of the name tables
tests/             round trips, test programs, the CodeWalker oracle
third_party/miniz  deflate (public domain)
third_party/clipper2  polygon clipping for the navmesh builder (Boost licence)

What it reads and writes

Format	Read	Write	Notes
RSC7 resources	yes	yes	the container of every streamed asset; its own page layout (rsc.h)
GTA V Enhanced	yes	yes	the gen9 .ytd/.ydr/.ydd/.yft/.ypt, read and written alongside Legacy's; conversion both ways (docs/enhanced.md)
.ytd textures	yes	yes	every DXT/BC/uncompressed format decoded to RGBA; DXT1/5, BC4/5 and uncompressed encoded; DDS and PNG
.ydr drawables, .ydd dictionaries	yes	yes	shaders, textures, skeleton, joints, LODs, lights, embedded collision
.ybn collision	yes	yes	every bound type, BVH read and build, meshes from triangles
.yft fragments	yes	yes	vehicles, props, ped ragdolls: drawables, physics LODs (groups, children, archetypes, bounds, joints), glass, vehicle glass, lights, cloth
.ynv navmeshes	yes	yes	polygons, edges and links, cover points, special links; every cell of both editions reads back exactly; polygon editing and rebuilding an area from collision (rk navmesh patch)
.ypt particle effects	yes	yes	textures and drawables, and every effect, emitter and particle rule kept as read: all 2,784 game files of both editions round-trip exactly
.yld cloth dictionaries	yes	yes	the simulated cloth of peds' clothing: verlet meshes, skinning, collision capsules
.ytyp / .ymap	yes	yes	typed archetypes (interiors with rooms, portals, entity sets), entities, MLO instances, car generators, occluders; a lossless generic meta layer under them
PSO (binary .ymt, .ypdb, .ymf)	yes	yes	byte for byte; a schema-driven walker; typed streaming manifests
RBF (creature metadata .ymt ...)	yes	yes	byte for byte: the expressions of clothing components and props, cutscene and Bink metadata
XML data files (.meta)	yes	yes	vehicles, carcols, carvariations, handling, vehiclelayouts, peds, pedalternatevariations, content.xml ...
.rel audio data	yes	yes	byte for byte; the dat151 items an interior needs; interior audio occlusion files
RPF7 archives	yes	yes	AES, NG, OPEN and plain; nested archives; writes all four, NG as the game encrypts it; Legacy and Enhanced alike
CodeWalker XML	no	yes	what CodeWalker's "Export XML" writes for .ydr/.ydd/.ybn/.ytd, which CodeWalker and Sollumz import
glTF 2.0	no	yes	.glb with textures
.fxc / .sps shaders	yes	no	constant buffers, parameters, techniques; a database of an install's shaders

And beyond single files: an index of every file and archetype of a GTA V install by name, with the game's DLC load order (gameindex.h), and a world index of what stands where on the map the game loads (world.h).

Made with ragekit

  Modlo Creator: a tailor-made 3D editor for GTA interiors (MLOs). Draw walls, rooms and doors, furnish and light them, and export a ready-to-stream FiveM resource. Everything it writes for the game goes through ragekit. Get it at modlocreator.app.

Made something with ragekit? Open an issue or a pull request to add it here.

Quick start

cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
cmake --build build

include(FetchContent)
FetchContent_Declare(
    ragekit
    GIT_REPOSITORY https://github.com/RatPrez/ragekit.git
    GIT_TAG        v0.2.0        # a release tag (or a commit hash); main follows the latest
    GIT_SHALLOW    TRUE
)
FetchContent_MakeAvailable(ragekit)

target_link_libraries(my_tool PRIVATE ragekit::ragekit)

or, with a copy of the repository next to your project, add_subdirectory(ragekit) and the same target_link_libraries.

#include <ragekit/ragekit.h>
using namespace rk;

Drawable d = read_ydr(rsc::read_file("prop.ydr"));
for (const Model& m : d.models(Lod::High))
    for (const Geometry& g : m.geometries)
        std::printf("%u vertices, %zu triangles\n", g.vertex_count, g.indices.size() / 3);
rsc::write_file("prop_copy.ydr", write_ydr(d));

Examples

examples/ holds small, complete programs, built with the library when ragekit is the top-level project:

• ydr_info - what a drawable holds: LODs, models, geometries, shaders, embedded textures
• ytd_export - a texture dictionary to .dds and .png files
• to_gltf - a drawable to a binary glTF with its textures
• box_collision - a collision file made from a triangle mesh
• make_interior - an interior (.ytyp) and the map file that places it (.ymap)
• rpf_list - listing an archive, nested archives included, and extracting a file
• game_lookup - finding an archetype in a GTA V install and pulling its model and textures

Documentation

• Getting started: building, using it from CMake, conventions, keys
• RSC7 resources: the container, page flags, building resources, the page layout
• Models, textures and collision: ytd, ydr, ydd, ybn, yft, CodeWalker XML, glTF
• Navmeshes: cells, polygons and links, reading and writing, editing, rebuilding an area from collision
• GTA V Enhanced: choosing the edition, what differs, converting between Legacy and Enhanced
• Map files: the meta container, ytyp and ymap, occluders
• PSO, RBF, XML data, manifests and audio: PSO and RBF files, .meta XML, _manifest.ymf, .rel, interior audio
• RPF archives: reading, keys, writing
• The game index and the world index
• The rk tool
• How it is checked
• ragekit and CodeWalker: format coverage side by side

How it is checked

Against the game's own files and against CodeWalker. A sample of 4,958 files of the install (every 50th resource, PSO and audio file) is read, written and read again, and every one compares equal field for field; a digest of what is written holds every rewrite to the bytes the code wrote before. CodeWalker loads what ragekit writes: drawables, texture dictionaries and collision with the same summary as the originals, map files with the same summary and the same CodeWalker XML. These tests do not run the game itself. See docs/testing.md.

Not done yet

• Typed models for the common PSO files (carcols, carvariations, peds ...).
• Animations (.ycd), path nodes and the other formats docs/codewalker-comparison.md lists as gaps.

AI usage

ragekit is developed with assistance from Claude (Anthropic). The code and the tests are written with Claude's assistance under the author's direction, and the documentation is written by Claude. The format knowledge comes from CodeWalker's source (credited below) and from the game's own files, and every change is checked the same way: the round trip over the game's own files, the test programs, and CodeWalker loading what ragekit writes (docs/testing.md).

Credits and licence

MIT (see LICENSE). The file structures were first ported from CodeWalker by dexyfex and Neodymium (MIT), and ragekit's CodeWalker XML is written to match CodeWalker's; parts are being rewritten independently, and the credit stays in LICENSE while any derived code remains. The interior audio recipe follows ht_mlotool / gtav-audio-occlusion (MIT). miniz is by Rich Geldreich and contributors (public domain). Clipper2 is by Angus Johnson (Boost Software License 1.0, third_party/clipper2/LICENSE).

---