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Chose a test print in Proof. Workshopping layering.

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noisedestroyers
2026-07-19 13:35:22 -04:00
parent 6dcb10c68b
commit 3f2d25f90e
1 changed files with 15 additions and 4 deletions
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src/qft/carpet.js
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@@ -43,6 +43,13 @@ export function carpetSVG(size, opts = {}) {
blips: 1.0, // density of the spiralling wave-packet excitations blips: 1.0, // density of the spiralling wave-packet excitations
hue: 0.52, hue2: 0.55, sat: 0.55, lightNear: 0.34, lightFar: 0.62, hue: 0.52, hue2: 0.55, sat: 0.55, lightNear: 0.34, lightFar: 0.62,
strokeNear: 1.7, strokeFar: 0.5, strokeNear: 1.7, strokeFar: 0.5,
// optional field injections (all default OFF → output unchanged):
// warpFn(t, d) → extra normalized vertical displacement (×amp) — an
// external field (e.g. wind) shaping the rows
// phaseFn(t, r) → phase shift added to every base mode (shimmer)
// modesFn(rng, o) → replace the base mode set entirely (e.g. a CMB
// power-spectrum-shaped spectrum)
warpFn: null, phaseFn: null, modesFn: null,
}, opts); }, opts);
const W = size, H = size, u = size / 1000; const W = size, H = size, u = size / 1000;
const paper = resolveSubstrate(o.substrate).paper.flat; const paper = resolveSubstrate(o.substrate).paper.flat;
@@ -50,8 +57,10 @@ export function carpetSVG(size, opts = {}) {
// ---- base sea: low-frequency field modes (phase drifts slowly per row) ---- // ---- base sea: low-frequency field modes (phase drifts slowly per row) ----
const M = Math.round(4 + o.chaos * 8); const M = Math.round(4 + o.chaos * 8);
const modes = []; let modes = [];
for (let m = 0; m < M; m++) { if (o.modesFn) {
modes = o.modesFn(rng, o);
} else for (let m = 0; m < M; m++) {
const f = range(rng, 0.4, 3.0 + o.chaos * 5); // low q: long swells dominate const f = range(rng, 0.4, 3.0 + o.chaos * 5); // low q: long swells dominate
modes.push({ f, a: 1 / (1 + f * 1.0), phi: range(rng, 0, Math.PI * 2), drift: range(rng, -1, 1) * (0.06 + f * 0.02) }); modes.push({ f, a: 1 / (1 + f * 1.0), phi: range(rng, 0, Math.PI * 2), drift: range(rng, -1, 1) * (0.06 + f * 0.02) });
} }
@@ -78,7 +87,8 @@ export function carpetSVG(size, opts = {}) {
const value = (t, r) => { const value = (t, r) => {
let s = 0; let s = 0;
for (const m of modes) s += m.a * Math.sin(2 * Math.PI * m.f * t + m.phi + r * m.drift); const dphi = o.phaseFn ? o.phaseFn(t, r) : 0;
for (const m of modes) s += m.a * Math.sin(2 * Math.PI * m.f * t + m.phi + r * m.drift + dphi);
s /= norm; s /= norm;
let blip = 0; let blip = 0;
for (const e of exc) { for (const e of exc) {
@@ -112,7 +122,8 @@ export function carpetSVG(size, opts = {}) {
for (let i = 0; i <= npts; i++) { for (let i = 0; i <= npts; i++) {
const t = i / npts; const t = i / npts;
const e = env(t); const e = env(t);
pts.push({ x: cx - half + t * 2 * half, y: baseY[r] - amp * e * value(t, r) - amp * 0.55 * (e - eMin) * d }); const warp = o.warpFn ? o.warpFn(t, d) * amp : 0;
pts.push({ x: cx - half + t * 2 * half, y: baseY[r] - amp * e * value(t, r) - amp * 0.55 * (e - eMin) * d + warp });
} }
const path = smoothPath(pts); const path = smoothPath(pts);
const hue = o.hue + (o.hue2 - o.hue) * (1 - d); const hue = o.hue + (o.hue2 - o.hue) * (1 - d);