1ca9fa2f1f
Two devices that were built, wired up, and doing nothing. OVERLAYS. buildStack gated layering on `surfaceOf(m) === 'composable'`, and no scene in the library declared `surface` — so the only thing that could ever sit on top was the one scene declaring `role: 'accent'`, and the overlay roster excluded accents by construction. Empty intersection, every time: 0/144 stacks carried an overlay. Every layered frame in every song was the same particle field. Labelled the library from the phase 12 coverage gate rather than by eye: the 37 scenes painting under 30% of the frame are composable. Particle Field loses its privileged slot and becomes one of them, keeping only `background: false`, which is the honest part — points in empty space cannot carry a section alone. The reserved accent slot is gone; one roster, two passes at it. 1 distinct overlay scene becomes 27, and the rate lands at 34% of stacks after trimming a base chance that had been tuned while the branch was dead. THE CAMERA. framing.shift moved the frame by a median of 0.029 of a half-frame at a fresh random angle every shot, so successive offsets cancelled and the median jump at a cut was 0.014. Present in every frame, visible in none. look/Camera.js is the director's camera department: the story says tension, order and which act a section is in, and this turns that into where the frame looks and how it travels there. Each director names a camera. Jump distance follows tension and act, speed follows energy, and the curve is one of four. Cuts choose between reframing and matching, so two scenes can still read as one place. Median offset 0.190, median reframe 0.135, and 94% of shots now move during the shot rather than only at the cut. Four new gates, each with a FLOOR — the device this replaces passed every existing check while doing nothing, because the only bound was a ceiling. Also lands the in-progress Epic 4 story layer it builds on: Story.js, phase 13, and the direction statistic. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
81 lines
3.1 KiB
JavaScript
81 lines
3.1 KiB
JavaScript
// Flow family: curtains of light standing above the track's horizon.
|
|
//
|
|
// Distinct from Curl Flow (a full-frame advected field) and Silk Ribbon (one
|
|
// strand): this is several tall vertical sheets, each rippling on its own phase,
|
|
// dense at the base and dissolving upward. The rippling is a sum of sines rather
|
|
// than noise, which is what gives an aurora its folded-sheet look instead of a
|
|
// smoky one — noise curtains read as fog.
|
|
//
|
|
// The horizon is the track's, so this stands in the same place as every other
|
|
// scene that has ground.
|
|
|
|
export const auroraVeil = {
|
|
name: 'Aurora Veil',
|
|
family: 'flow',
|
|
kind: 'fragment',
|
|
// Paints 13% of the frame — see checks/phase12 coverage.
|
|
surface: 'composable',
|
|
consumes: ['ink'],
|
|
traits: ['camera', 'space', 'style'],
|
|
|
|
params: {
|
|
curtains: { type: 'int', range: [2, 9], default: 4, uniform: 'u_curtains', bias: 'density' },
|
|
height: { type: 'float', range: [0.4, 1.8], default: 1.0, uniform: 'u_height' },
|
|
fold: { type: 'float', range: [0.1, 1.4], default: 0.55, uniform: 'u_fold', bias: 'density' },
|
|
speed: { type: 'float', range: [0.03, 0.5], default: 0.15, uniform: 'u_speed', bias: 'motion', rate: true },
|
|
ground: { type: 'float', range: [0, 0.8], default: 0.3, uniform: 'u_ground' },
|
|
palette: { type: 'palette', count: 5 },
|
|
},
|
|
|
|
reactive: {
|
|
fold: { feature: 'bandLow', amount: 0.3, response: 'smooth' },
|
|
},
|
|
|
|
shader: `
|
|
vec4 scene(vec2 uv, vec2 p) {
|
|
float t = u_time * u_speed + u_seed;
|
|
p = sigCamera(p);
|
|
|
|
float horizon = sigHorizonY() * 0.8 - 0.55;
|
|
float above = p.y - horizon;
|
|
|
|
vec3 col = pal(0) * 0.06;
|
|
|
|
for (int i = 0; i < 9; i++) {
|
|
if (i >= u_curtains) break;
|
|
float fi = float(i);
|
|
float s = u_seed + fi * 37.13;
|
|
|
|
// Each sheet is a vertical line whose x wanders as a sum of three sines.
|
|
// Three is the fewest that stops reading as a single wobble.
|
|
float x = (fract(s * 0.61) - 0.5) * 2.2
|
|
+ sin(above * 1.7 + t * 1.3 + s) * u_fold * 0.35
|
|
+ sin(above * 3.1 - t * 0.8 + s * 1.7) * u_fold * 0.18
|
|
+ sin(above * 0.7 + t * 0.4 + s * 2.3) * u_fold * 0.5;
|
|
|
|
float d = abs(p.x - x);
|
|
float widthAt = 0.05 + above * 0.06 + u_sigLine * 0.05;
|
|
|
|
// Bright and tight at the base, wide and faint at the top: the vertical
|
|
// falloff is what makes it a curtain rather than a stripe.
|
|
float rise = smoothstep(-0.05, 0.0, above) * exp(-max(above, 0.0) / max(u_height, 0.05));
|
|
float sheet = exp(-d * d / max(widthAt * widthAt, 1e-5)) * rise;
|
|
|
|
vec3 tint = palRamp(fract(s) * 0.5 + above * 0.12 + 0.1);
|
|
col += tint * sheet * (0.55 + 0.5 * 0.6);
|
|
}
|
|
|
|
// Ground: the curtains reflected, dim and compressed.
|
|
if (u_ground > 0.01 && above < 0.0) {
|
|
float below = -above;
|
|
col += pal(2) * u_ground * exp(-below * 6.0) * 0.35;
|
|
}
|
|
|
|
col = sigAir(col, p, smoothstep(0.0, 1.6, abs(p.x)));
|
|
return vec4(inkValue(col), 1.0);
|
|
}
|
|
`,
|
|
};
|
|
|
|
export default auroraVeil;
|