Internals
Return Fire on Windows is a port of the 3DO original: the renderer is a software emulation of the 3DO's cel engine, drawing into an 8-bit DirectDraw surface, and the game logic runs in 16.16 fixed point on a variable timestep of whole 16 ms ticks. OpenRF keeps that structure.
| Document | Contents |
|---|---|
| Portable core | App state machine, platform contract, file layer and disc images, audio mixer |
| Engine architecture | Program flow, timing, input, sound and music, renderer overview, function index |
| Renderer | Projection, floor walk, 3D model format, depth sort, draw functions |
| Game simulation | Object system, collision, vehicles, weapons, AI, rules |
| ART.CAR | Sprite bank (3DO Cel Control Blocks), palettes, TRANS.TBL |
| RFM maps | Level map format, tile and object tables |
| STM movies | Pre-interleaved Cinepak + PCM movie container |
Source layout
| Path | Contents |
|---|---|
src/ | Portable core: app state machine, file layer (vfs.c), audio mixer, asset loaders, movies, music, sound, HUD, front end; the SDL3 backend platform_sdl.c |
src/render/ | Cel rasteriser, camera, world renderer, 3D models |
src/game/ | Simulation: objects, collision, vehicles, weapons, effects, AI, rules |
tools/ | Format decoders, table generators, reference renderer |
tests/ | Headless tests against the original data |