Orkuncakilkaya
382826889f
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>
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| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| light-height | Light.height | light | namespace-method | Light.height | Light.height(height) | Set the virtual height of lights above the surface, for normal-map shading. | 12 | Light | height |
Sets how far above the surface plane lights sit, in pixels — the z distance used when shading normal-mapped surfaces. A low height makes light rays graze the surface, so tilted faces contrast sharply; a high height lights everything more head-on. It only affects the N·L term, so a scene with no stamped normals is unchanged. The default (64) suits most scenes. Persists until changed.
Parameters:
height— the light's height above the plane in pixels (> 0)
program Demo {
property Wall { x: int = 0, y: int = 0 }
model Block { Wall }
handler Render phase Update {
Screen.clear(0)
Light.clear_normals()
Light.height(24) # low, grazing light
Light.normal(60, 50, 16, 24, 0.7, 0.0)
Light.point(120, 62, 90, Color.rgb(255, 240, 200), 1.0)
Screen.show()
}
}