Orkuncakilkaya
31cfbc2465
Completes the transform/state-based rendering #23 tracked as blocked on new renderer state. All of it threads through the two framebuffer chokepoints every draw primitive already funnels through (rt_put_px / rt_fill_rect), so one place gives the whole draw API a camera, a clip rect, and a blend mode. Defaults are neutral — camera (0,0), clip = full screen, blend = replace — so every existing golden render is byte-identical (the 60+ render tests still pass unchanged). New renderer state (runtime/native/core.ludic): - Screen.camera(x, y) / Camera.set(x, y) world-space draw offset; a world point draws at (wx-x, wy-y). Moves everything — reset to (0,0) for a HUD. - Camera.follow(x, y, lerp) ease the offset toward centring a target (fixed lerp 0..1) - Camera.shake(amount) +/- amount jitter from the seeded RNG (replay shakes identically); 0 clears - Screen.clip(x,y,w,h) / clip_reset() screen-space clip rectangle - Screen.blend_mode(m) 0 = replace, 1 = additive (clamped) New primitives: - Screen.oval(x, y, rx, ry, color) axis-aligned ellipse outline (midpoint) - Screen.measure_text(text) -> int advance width in the 5x7 font - Screen.pixel(x, y) -> int read a framebuffer pixel (0x00RRGGBB) Everything stays integer and deterministic (the camera, shake, and blend all reproduce exactly under identical inputs), so headless renders remain diffable. Camera.follow interpolates in the fixed domain (fixed*fixed then floor) to avoid the int*fixed coercion trap. Screen.pixel makes the whole surface testable by reading rendered pixels back: examples/library/render.ludic asserts 18 cases — pixel round-trip, camera and Camera.set/follow offsets, clip in/out + reset, additive blend with 255 clamp, oval extremes vs hollow centre, and text measurement — all verified against the actual framebuffer, not just that the call compiled. Wired into x test (now 65 passed). Docs: 7 new Screen pages + a Camera section with 3 pages, inventory/coverage green. Seed reseeded; the C-free bootstrap fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| .. | ||
| ecs | ||
| events | ||
| games | ||
| lang | ||
| library | ||
| networking | ||
| rendering | ||
| README.md | ||
Examples
A curated tour of Ludic, grouped by intent. Every example here is exercised by
the test suite (bin/x test / bin/x selfhost-test), so nothing in this
directory silently rots.
Run any program straight from the repository root (so assets/ resolves):
bin/x app examples/games/snake.ludic # compile + open a real window
bin/x app examples/games/snake.ludic --headless # render one frame to build/out.ppm
bin/ludic examples/lang/offline_rewards.ludic # compile + run a plain program
games/ — complete, windowed games
| Example | What it shows |
|---|---|
games/snake.ludic |
A full game from primitives: input, grid, growth, collision, score. |
games/menu.ludic |
A retained-UI title screen — the UI declared as data. |
games/chronorift.ludic |
A 2D co-op JRPG: overworld, dungeon, random encounters, turn battle, boss, save. The entry file imports the modules under games/chronorift/. |
rendering/ — drawing primitives
| Example | What it shows |
|---|---|
rendering/draw_prims.ludic |
The extended Screen.* primitives — line, circle, triangle, fill, sprite. |
ecs/ — the entity-component world
| Example | What it shows |
|---|---|
ecs/hello.ludic |
The smallest program that exercises the ECS pipeline. |
ecs/world_get.ludic |
Reflection: read/write a component by name. |
ecs/world_scan.ludic |
Reflection: scan the world and identify each entity. |
ecs/world_query.ludic |
Reflection: iterate the world by property. |
ecs/world_spawn.ludic |
Reflection: a mod spawns a fresh entity by model id. |
ecs/world_mixed.ludic |
Reflection: get/set through real struct offsets. |
ecs/world_dyn.ludic |
Reflection: register a brand-new component at runtime. |
events/ — the event bus
| Example | What it shows |
|---|---|
events/events.ludic |
EV0: the event-bus core — declare, emit, @On. |
events/mod_events.ludic |
Two listeners on one event, driven from a mod. |
events/cancel.ludic |
EV3: cancellable (decision) events. |
events/recurse.ludic |
EV6: re-entrant emit is depth-bounded — no runaway cycle. |
events/promote.ludic |
EV1: @Public promotes a lifecycle hook to a public event. |
events/prop_events.ludic |
EV1 for properties: attach/detach events. |
events/scene_events.ludic |
EV1 for scenes: on-enter / on-exit events. |
events/program_events.ludic |
EV1 for the program scope: start/quit events. |
events/layer_events.ludic |
EV1 for layers + a public layer's show/hide events. |
events/scoped.ludic |
A despawned entity drops out of subsequent event work. |
networking/ — deterministic multiplayer (N0–N6)
Each maps to a stage of the Networking design; all run over the compiler's built-in loopback transport with zero foreign code.
| Example | What it shows |
|---|---|
networking/net_echo.ludic |
N0: the transport seam. |
networking/net_snapshot.ludic |
N1: whole-world snapshot to a memory buffer. |
networking/net_sync.ludic |
N2: @Sync replication codegen. |
networking/net_owner.ludic |
N3: entity ownership. |
networking/net_rpc.ludic |
N4: remote events / RPCs. |
networking/net_roles.ludic |
N5: handler roles + the drivable sim. |
networking/net_demo.ludic |
N6: a networked game end to end, in pure Ludic. |
networking/net_rt.ludic |
A blessed server-authoritative replication runtime. |
lang/ — language & standard-library tour
| Example | What it shows |
|---|---|
lang/annotations.ludic |
The annotation-first style: @Queries / @Computed / @OnSpawn / @Handles. |
lang/qdecl.ludic |
@Queries desugaring to the query system. |
lang/lifecycle.ludic |
The whole game lifecycle as @-hooks, in firing order. |
lang/detach.ludic |
Structural attach/detach + @OnAttach / @OnDetach. |
lang/reason.ludic |
Reason-carrying teardown (@OnDespawn: Despawned vs Quit). |
lang/toggle.ludic |
enable/disable at the three ECS scopes. |
lang/scenes.ludic |
One active scene at a time, handlers grouped into layers. |
lang/strings.ludic |
Strings as values: compare, join, interpolate, slice. |
lang/rng_demo.ludic |
The Random.* extensions (value/int/sign). |
lang/time_demo.ludic |
Time.frame / elapsed / delta. |
lang/offline_rewards.ludic |
A worked idle-game example over the Time/Date/Duration stdlib. |
library/ — building and linking a shared library
A how-to for compiling a .ludic module to a native .dylib/.so/.dll and
linking a second program against it via extern fn:
bin/ludicc examples/library/combat.ludic --shared -o build/libcombat.dylib
bin/ludicc examples/library/arena.ludic -o build/arena -Lbuild -lcombat
| Example | What it shows |
|---|---|
library/combat.ludic |
Exported functions callable across the C ABI. |
library/arena.ludic |
A program that links against the shared library. |