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>
1.7 KiB
1.7 KiB
| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| light-spot | Light.spot | light | namespace-method | Light.spot | Light.spot(x, y, radius, color, energy, direction, spread) | A cone / flashlight light aimed at a direction with a half-angle spread. | 5 | Light | spot |
Accumulates a cone (spot) light — like Light.point, but only the wedge aimed at direction degrees (measured from +x, counter-clockwise) within a half-angle of spread degrees receives light. Pixels outside the cone stay dark, and the last few degrees of the edge feather so the boundary is not a hard line. A spot shares every quality control with a radial light — Light.falloff, Light.soft, Light.gel and the normal buffer all apply. Fully deterministic (integer degrees + Q16.16).
Parameters:
x,y— the light centre, in screen pixelsradius— the reach in pixels; brightness is zero at and beyond itcolor— the light colour,0x00RRGGBBenergy— afixedbrightness multiplier (1.0= full)direction— the aim, in whole degrees (0= right,90= up,180= left)spread— the cone half-angle, in whole degrees (180≈ omnidirectional)
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.spot(80, 60, 70, Color.rgb(255, 240, 200), 1.0, 0, 30) # a flashlight pointing right
Screen.show()
}
}