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feat(light): render-quality tiers 3-4 — cones, falloff, soft shadows, gels, normals, day/night (#49) 
The remaining lighting tiers from the original proposal, all extending the
deterministic accumulation core (light.ludic) — no new ECS plumbing:

- Light.spot: cone / flashlight lights (direction + spread degrees), with a
  self-contained integer atan2-in-degrees and a feathered edge.
- Light.falloff: a brightness-ramp exponent (1 linear, 2 quadratic, …) via
  repeated fixed multiply.
- Light.soft: soft shadows — an area-sampled light so an occluder edge fades
  through a penumbra instead of a hard cut.
- Light.gel + Light.clear_gel: colour cookies — a light gels from its centre
  colour to a rim colour.
- Light.normal + Light.clear_normals + Light.height: a normal G-buffer so
  surfaces shade by facing (N·L), not distance alone (tier 3).
- Light.time_of_day: a day/night ambient ramp from a single 0..1 value.

The engine lighting system (systems_light.ludic) consumes matching optional
Light2D fields — direction/spread/falloff/softness/gel — each defaulting off so
an older five-field Light2D lights exactly as before. Every tier is integer +
Q16.16 fixed, so scenes light identically on every run and headless.

Worked example + regression: examples/library/light_tiers.ludic (1 1 1 1 1 1 1 1 1).
Nine new docs/language/light pages. Full suite 76 passed, self-host C-free
fixpoint intact, no golden drift.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-31 16:35:41 +03:00
..
anim feat(stdlib): add Anim.* + Tween.* — deterministic 2D animation & tweening (#5) 2026-08-31 13:05:06 +03:00
annotations refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
builtins feat(errors): recoverable failures as values — try/else over ok/err results (#46) 2026-08-31 15:04:14 +03:00
camera feat(rendering): add Screen.camera/clip/blend_mode/oval + Camera.* + Screen.pixel (#23) 2026-08-31 13:43:01 +03:00
clock feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
collision refactor(stdlib): de-abbreviate namespaces (Mem/Sys/Net/Collide) 2026-08-30 01:30:47 +03:00
color feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
colors docs: add Networking section + process/OS builtins (net_send, owner, is_server, serialize/apply, arg, exit, run, getenv, read_char, file_*) 2026-08-29 16:39:29 +03:00
control feat(errors): recoverable failures as values — try/else over ok/err results (#46) 2026-08-31 15:04:14 +03:00
crypto feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00
date feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
datetime feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
duration feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
ease feat(stdlib): Math.exp/log/pow + Ease.elastic transcendentals (issue #25) 2026-08-30 01:19:44 +03:00
ecs refactor(lang): rename the str type (and stringify builtin) to string 2026-08-30 01:51:11 +03:00
events docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
fs feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
grid feat(stdlib): add Grid.* — tile geometry + A* pathfinding over the tilemap (#24) 2026-08-31 12:36:12 +03:00
hash feat(lang,stdlib): 64-bit long type + 64-bit Hash variants (issue #17) 2026-08-30 01:01:06 +03:00
input feat(input): action maps + deterministic record/replay (#7) 2026-08-31 16:03:56 +03:00
json feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
light feat(light): render-quality tiers 3-4 — cones, falloff, soft shadows, gels, normals, day/night (#49) 2026-08-31 16:35:41 +03:00
list feat(stdlib): sorting toolkit — sort_by/sort_desc_by/sort_with + stable merge sort (#11) 2026-08-30 11:39:26 +03:00
log feat(stdlib): add Log.* — levelled, structured logging (#15) 2026-08-30 21:57:22 +03:00
map docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
math refactor(lang): rename builtins flr->floor and fx->fixed 2026-08-30 02:01:56 +03:00
memory refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
mime feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
network docs: merge duplicate networking namespace dirs; guard against recurrence 2026-08-30 16:46:21 +03:00
noise feat(stdlib): add Noise.* — deterministic fixed-point procedural noise (#3) 2026-08-30 21:50:50 +03:00
operators refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
os feat(stdlib): add Os.* — the OS/environment interface (#21) 2026-08-30 22:19:11 +03:00
path feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
phases docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
query feat(stdlib): add Query.* — ECS spatial queries over the reflection ABI (#42) 2026-08-31 13:19:25 +03:00
random feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
reflect feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
regex feat(stdlib): add Regex.* — a linear-time regular-expression engine (#18) 2026-08-31 12:23:19 +03:00
save feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
scenes docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
screen feat(rendering): add Screen.camera/clip/blend_mode/oval + Camera.* + Screen.pixel (#23) 2026-08-31 13:43:01 +03:00
structure feat(lang): new Type { field: value } record initialisers 2026-08-31 01:20:06 +03:00
system refactor(stdlib): consolidate System.* onto Os.*, retire duplicated members 2026-08-30 22:54:28 +03:00
testing feat(testing): line coverage via --coverage + bin/x test --coverage (#45) 2026-08-31 14:51:14 +03:00
text refactor(stdlib): consolidate System.* onto Os.*, retire duplicated members 2026-08-30 22:54:28 +03:00
time feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
tween feat(stdlib): add Anim.* + Tween.* — deterministic 2D animation & tweening (#5) 2026-08-31 13:05:06 +03:00
types feat(stdlib): 2D Vector type + Vector.* namespace (issue #25) 2026-08-30 02:09:38 +03:00
unicode feat(stdlib): add Unicode.* — UTF-8 code points, graphemes, case mapping (#13) 2026-08-30 22:29:00 +03:00
uuid feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00
value feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
vector feat(stdlib): 2D Vector type + Vector.* namespace (issue #25) 2026-08-30 02:09:38 +03:00
world feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00