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-falloff | Light.falloff | light | namespace-method | Light.falloff | Light.falloff(exponent) | Set the brightness-ramp exponent for later lights (1 linear, 2 quadratic…). | 6 | Light | falloff |
Sets the falloff curve applied to every light emitted after it. A light's brightness ramps from full at the centre to zero at its radius; the ramp is raised to exponent, so 1 is the original linear falloff, 2 is quadratic (a softer, more concentrated core), 3 cubic, and so on. Like the occluder store, the setting persists across frames until changed — a game sets it once, or per light, and it rides alongside the short Light.point / Light.spot signatures. Integer exponent, Q16.16 ramp — deterministic.
Parameters:
exponent— the ramp power, an integer>= 1(1= linear, the default)
program Demo {
property Torch { x: int = 0, y: int = 0 }
model Lamp { Torch }
handler Render phase Update {
Screen.clear(0)
Light.ambient(Color.rgb(24, 24, 32))
Light.falloff(2) # a tighter, quadratic glow
Light.point(80, 60, 70, Color.rgb(255, 210, 130), 1.0)
Screen.show()
}
}