Orkuncakilkaya
a71279a7b9
A software light pass over the framebuffer, run in a render phase after drawing the scene: Light.ambient multiplies the scene toward a tint (night/cave mood), Light.point additively accumulates a radial glow with linear falloff clamped per channel, and Light.occlude / Light.clear_occluders cast hard shadows by blocking a light's rays against rectangular occluders. Integer + Q16.16 fixed throughout, so a scene lights identically every run and in a headless render (diffable). Engine in runtime/native/light.ludic, spliced on demand (g_uses_light) like the regex/query runtimes; namespace wired in emit_call.ludic. Ships issue #4 tiers 1 (ambient + additive radial lights) and 2 (hard shadows). Normal-mapped sprites, soft shadows, a day/night directional light, and auto-consuming Light2D/Occluder components are follow-ups (the auto-system hook is tracked by #43). - runtime/native/light.ludic: the light-accumulation engine (isqrt falloff, segment/occluder shadow test, ambient modulate) - examples/library/lighting.ludic: 14 pixel-readback assertions - docs/language/light/: Light.ambient/point/occlude/clear_occluders - tools/x/test.ludic: lighting.ludic in the regression suite Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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1.1 KiB
| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| light-clear_occluders | Light.clear_occluders | light | namespace-method | Light.clear_occluders | Light.clear_occluders() | Forget every occluder — call once per frame before re-registering. | 4 | Light | clear_occluders |
Forgets every rectangle previously passed to Light.occlude. Occluders accumulate across calls and persist between frames, so a game that casts shadows calls this once at the top of its render phase and then re-registers the walls that should block light this frame — the same clear-then-rebuild rhythm as an immediate-mode draw list. With no occluders registered, Light.point lights its whole radius unobstructed.
Parameters: none.
program Demo {
property Tag { v: int = 0 }
model Marker { Tag }
handler Render phase Update {
Screen.clear(0)
Light.clear_occluders() # start the frame with no shadows
Light.occlude(90, 60, 6, 40)
Light.point(40, 80, 100, Color.rgb(255, 255, 255), 1.0)
Screen.show()
}
}