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/*{ "DESCRIPTION": "Alchemic Constellation: a drifting plexus of stars is the living armature — each node seeds a Gray-Scott reaction and erupts liquid-chrome droplets, so the constellation web knits through pooled metal and glowing chemistry over a deep starfield. A three-way merge of Catalyst Tide (evoew5ug), Chrome Current (6pxkqozk), and Asterism (dvu2t05o).", "CREDIT": "glslop agent (Claude Opus 4.8)", "CATEGORIES": ["reaction-diffusion", "chrome", "feedback", "plexus", "constellation", "spectral"], "INPUTS": [ { "NAME": "feed", "TYPE": "float", "DEFAULT": 0.055, "MIN": 0.010, "MAX": 0.080 }, { "NAME": "kill", "TYPE": "float", "DEFAULT": 0.061, "MIN": 0.030, "MAX": 0.075 }, { "NAME": "simSpeed", "TYPE": "float", "DEFAULT": 1.05, "MIN": 0.1, "MAX": 2.0 }, { "NAME": "seedRate", "TYPE": "float", "DEFAULT": 0.68, "MIN": 0.0, "MAX": 1.0 }, { "NAME": "traceLife", "TYPE": "float", "DEFAULT": 0.99955, "MIN": 0.990, "MAX": 0.9998 }, { "NAME": "drift", "TYPE": "float", "DEFAULT": 1.0, "MIN": 0.0, "MAX": 2.0 }, { "NAME": "pulse", "TYPE": "float", "DEFAULT": 0.75, "MIN": 0.0, "MAX": 1.5 }, { "NAME": "colorPhase", "TYPE": "float", "DEFAULT": 0.56, "MIN": 0.0, "MAX": 1.0 }, { "NAME": "motion", "TYPE": "float", "DEFAULT": 1.05, "MIN": 0.0, "MAX": 2.5 }, { "NAME": "swirl", "TYPE": "float", "DEFAULT": 1.15, "MIN": 0.0, "MAX": 2.0 }, { "NAME": "warp", "TYPE": "float", "DEFAULT": 1.0, "MIN": 0.0, "MAX": 2.0 }, { "NAME": "trail", "TYPE": "float", "DEFAULT": 0.9980, "MIN": 0.97, "MAX": 0.9998 }, { "NAME": "sparkle", "TYPE": "float", "DEFAULT": 0.72, "MIN": 0.0, "MAX": 1.5 }, { "NAME": "hueShift", "TYPE": "float", "DEFAULT": 0.08, "MIN": 0.0, "MAX": 1.0 }, { "NAME": "stir", "TYPE": "float", "DEFAULT": 0.60, "MIN": 0.0, "MAX": 1.5 }, { "NAME": "etch", "TYPE": "float", "DEFAULT": 0.75, "MIN": 0.0, "MAX": 1.5 }, { "NAME": "flow", "TYPE": "float", "DEFAULT": 0.55, "MIN": 0.0, "MAX": 1.5 }, { "NAME": "fuse", "TYPE": "float", "DEFAULT": 0.60, "MIN": 0.0, "MAX": 1.0 }, { "NAME": "link", "TYPE": "float", "DEFAULT": 0.60, "MIN": 0.30, "MAX": 1.0 }, { "NAME": "starSize", "TYPE": "float", "DEFAULT": 0.020, "MIN": 0.008, "MAX": 0.05 }, { "NAME": "glow", "TYPE": "float", "DEFAULT": 0.80, "MIN": 0.20, "MAX": 1.6 }, { "NAME": "tint", "TYPE": "float", "DEFAULT": 0.50, "MIN": 0.0, "MAX": 1.0 }, { "NAME": "web", "TYPE": "float", "DEFAULT": 0.85, "MIN": 0.0, "MAX": 1.6 } ], "PASSES": [ { "TARGET": "chem", "PERSISTENT": true, "FLOAT": true }, { "TARGET": "paint", "PERSISTENT": true, "FLOAT": true }, {} ] }*/ #define TAU 6.28318530718 #define NODES 22 // spectral chemistry palette (Catalyst Tide) vec3 palette(float t) { return 0.50 + 0.50 * cos(TAU * (t + colorPhase + vec3(0.00, 0.19, 0.43))); } // liquid-chrome palette (Chrome Current) vec3 paletteM(float t) { return 0.5 + 0.5 * cos(TAU * (t + hueShift + vec3(0.00, 0.29, 0.57))); } vec2 chemistry(vec2 uv) { return IMG_NORM_PIXEL(chem, uv).rg; } float blob(vec2 uv, vec2 center, float size) { vec2 d = uv - center; d.x *= RENDERSIZE.x / RENDERSIZE.y; return 1.0 - smoothstep(0.0, size, length(d)); } float droplet(vec2 p, vec2 center, float size) { return 1.0 - smoothstep(0.0, size, length(p - center)); } vec2 vortex(vec2 p, vec2 center, float spin) { vec2 d = p - center; float influence = exp(-dot(d, d) * 13.0); return vec2(-d.y, d.x) * influence * spin; } // --- Asterism plexus --- float hash(vec2 p){ p = fract(p * vec2(123.34, 456.21)); p += dot(p, p + 45.32); return fract(p.x * p.y); } // node position in centered p-space (x already aspect-scaled): matches (uv-0.5) with x*=aspect vec2 node(float i, float t){ return 0.85 * vec2(sin(i * 1.7 + t * 0.20), cos(i * 2.3 + t * 0.15)) + 0.32 * vec2(sin(i * 0.7 + t * 0.11), cos(i * 1.1 - t * 0.13)); } float distSeg(vec2 p, vec2 a, vec2 b){ vec2 pa = p - a, ba = b - a; float h = clamp(dot(pa, ba) / dot(ba, ba), 0.0, 1.0); return length(pa - ba * h); } void main() { vec2 uv = isf_FragNormCoord; float aspect = RENDERSIZE.x / RENDERSIZE.y; vec2 px = 1.0 / RENDERSIZE; if (PASSINDEX == 0) { // ============================================================ // PASS 0 — CHEMISTRY (Gray-Scott): stirred by chrome, seeded by stars // ============================================================ vec3 state = IMG_NORM_PIXEL(chem, uv).rgb; vec2 c = state.rg; if (FRAMEINDEX < 2 || dot(c, c) < 0.000001) { vec2 pp = uv - 0.5; pp.x *= aspect; float organic = sin(pp.x * 31.0) + sin(pp.y * 27.0) + sin((pp.x + pp.y) * 19.0) + sin(length(pp) * 43.0); float seed = smoothstep(1.85, 2.85, organic) * (1.0 - smoothstep(0.10, 0.58, length(pp))); c = mix(vec2(1.0, 0.0), vec2(0.52, 0.28), clamp(seed, 0.0, 1.0)); } // --- chrome current stirs the reagents (metal -> chem) --- vec3 metalPrev = IMG_NORM_PIXEL(paint, uv).rgb; float mL = dot(metalPrev, vec3(0.3333)); float mLx = dot(IMG_NORM_PIXEL(paint, uv + vec2(px.x, 0.0)).rgb, vec3(0.3333)); float mLy = dot(IMG_NORM_PIXEL(paint, uv + vec2(0.0, px.y)).rgb, vec3(0.3333)); vec2 metalFlow = vec2(-(mLy - mL), (mLx - mL)); vec2 p = uv - 0.5; p.x *= aspect; vec2 driftVec = vec2( sin(p.y * 8.0 + TIME * 0.23) + cos(p.x * 5.0 - TIME * 0.17), cos(p.x * 7.0 - TIME * 0.19) - sin(p.y * 4.0 + TIME * 0.13) ) * (0.00070 * drift); driftVec += metalFlow * (0.9 * stir); vec2 sampleUV = uv + driftVec; vec2 lap = -c; lap += 0.20 * chemistry(sampleUV + vec2(px.x, 0.0)); lap += 0.20 * chemistry(sampleUV - vec2(px.x, 0.0)); lap += 0.20 * chemistry(sampleUV + vec2(0.0, px.y)); lap += 0.20 * chemistry(sampleUV - vec2(0.0, px.y)); lap += 0.05 * chemistry(sampleUV + px); lap += 0.05 * chemistry(sampleUV - px); lap += 0.05 * chemistry(sampleUV + vec2(px.x, -px.y)); lap += 0.05 * chemistry(sampleUV + vec2(-px.x, px.y)); float u = c.r; float v = c.g; float reaction = u * v * v; float stepSize = min(TIMEDELTA * 60.0, 1.25) * simSpeed; float cycle = 0.5 + 0.5 * sin(TIME * 1.37); float localFeed = feed * (0.90 + 0.20 * cycle); u += (0.16 * lap.r - reaction + localFeed * (1.0 - u)) * stepSize; v += (0.08 * lap.g + reaction - (kill + localFeed) * v) * stepSize; vec2 orbitA = vec2(0.5 + 0.30 * cos(TIME * 0.29), 0.5 + 0.22 * sin(TIME * 0.43)); vec2 orbitB = vec2(0.5 + 0.23 * cos(TIME * 0.21 + 3.14), 0.5 + 0.30 * sin(TIME * 0.37 + 1.3)); vec2 orbitC = vec2(0.5 + 0.18 * sin(TIME * 0.61 + 0.8), 0.5 + 0.28 * cos(TIME * 0.33 - 0.6)); float pulseA = 0.45 + 0.55 * sin(TIME * 2.2); float pulseB = 0.50 + 0.50 * sin(TIME * 1.63 + 2.1); float pulseC = 0.50 + 0.50 * sin(TIME * 2.85 + 4.0); float freshSeed = blob(uv, orbitA, 0.027) * (0.55 + 0.45 * pulseA); freshSeed += 0.80 * blob(uv, orbitB, 0.023) * (0.55 + 0.45 * pulseB); freshSeed += 0.62 * blob(uv, orbitC, 0.019) * (0.55 + 0.45 * pulseC); freshSeed = clamp(freshSeed * seedRate, 0.0, 1.0); v = max(v, freshSeed * 0.42); u = mix(u, 0.47 + 0.08 * cycle, freshSeed * 0.90); // --- constellation stars seed the chemistry (Asterism -> chem) --- float starSeed = 0.0; for (int i = 0; i < NODES; i++) { vec2 n = node(float(i), TIME); vec2 nUV = vec2(n.x / aspect, n.y) + 0.5; starSeed += blob(uv, nUV, starSize); } starSeed = clamp(starSeed * seedRate, 0.0, 1.0); v = max(v, starSeed * 0.38); u = mix(u, 0.50, starSeed * 0.55); // --- bright flowing chrome injects catalyst (metal -> chem) --- float metalSeed = smoothstep(0.34, 0.92, mL) * stir; v = max(v, metalSeed * 0.40); u = mix(u, 0.50, metalSeed * 0.60); float memory = state.b * 0.74; memory += IMG_NORM_PIXEL(chem, uv + vec2(px.x, 0.0)).b * 0.065; memory += IMG_NORM_PIXEL(chem, uv - vec2(px.x, 0.0)).b * 0.065; memory += IMG_NORM_PIXEL(chem, uv + vec2(0.0, px.y)).b * 0.065; memory += IMG_NORM_PIXEL(chem, uv - vec2(0.0, px.y)).b * 0.065; memory *= pow(traceLife, stepSize); memory = max(memory, freshSeed * (0.68 + 0.18 * pulse)); memory = max(memory, starSeed * 0.42); memory = max(memory, smoothstep(0.10, 0.36, v) * 0.16); memory = max(memory, metalSeed * 0.22); memory += pulse * freshSeed * 0.08 * stepSize; u = clamp(u, 0.0, 1.0); v = clamp(v, 0.0, 1.0); float memoryHot = max(memory - 0.76, 0.0); memory = min(memory, 0.76) + memoryHot / (1.0 + 1.25 * memoryHot); gl_FragColor = vec4(u, v, clamp(memory, 0.0, 1.0), 1.0); } else if (PASSINDEX == 1) { // ============================================================ // PASS 1 — LIQUID CHROME: flowed & etched by chemistry, erupting at stars // ============================================================ float frameStep = min(TIMEDELTA * 60.0, 2.0); float t = TIME * motion; vec2 p = uv - 0.5; p.x *= aspect; vec3 cyan = mix(vec3(0.2, 0.8, 1.0), vec3(0.4, 0.5, 1.0), tint); vec2 a = vec2(0.27 * cos(t * 0.39), 0.24 * sin(t * 0.51)); vec2 b = vec2(0.25 * cos(t * 0.35 + 3.1), 0.28 * sin(t * 0.44 + 2.2)); vec2 cC = vec2(0.19 * sin(t * 0.63 + 0.4), 0.29 * cos(t * 0.31 - 0.7)); vec2 vel = vortex(p, a, 2.3) + vortex(p, b, -2.0) + vortex(p, cC, 1.35); vel += vec2( sin(TAU * uv.y * 2.0 + t * 0.42), cos(TAU * uv.x * 2.0 - t * 0.33) ) * (0.052 + 0.025 * warp); vel += 0.026 * warp * vec2(sin(p.y * 19.0 + t), cos(p.x * 17.0 - t * 0.8)); // --- reaction morphology becomes a flow field (chem -> metal) --- float vHere = IMG_NORM_PIXEL(chem, uv).g; float vRt = IMG_NORM_PIXEL(chem, uv + vec2(px.x, 0.0)).g; float vUp = IMG_NORM_PIXEL(chem, uv + vec2(0.0, px.y)).g; vec2 chemGrad = vec2(vRt - vHere, vUp - vHere); vel += vec2(-chemGrad.y, chemGrad.x) * (34.0 * flow); vel *= swirl; vel.x /= aspect; vec2 back = uv - vel * (0.0145 * frameStep * motion); vec3 old = IMG_NORM_PIXEL(paint, back).rgb * 0.64; old += IMG_NORM_PIXEL(paint, back + vec2(px.x, 0.0)).rgb * 0.09; old += IMG_NORM_PIXEL(paint, back - vec2(px.x, 0.0)).rgb * 0.09; old += IMG_NORM_PIXEL(paint, back + vec2(0.0, px.y)).rgb * 0.09; old += IMG_NORM_PIXEL(paint, back - vec2(0.0, px.y)).rgb * 0.09; old *= pow(trail, frameStep); old.r = max(old.r, IMG_NORM_PIXEL(paint, back + px * 1.35).r * 0.11); old.b = max(old.b, IMG_NORM_PIXEL(paint, back - px * 1.35).b * 0.11); float injectA = droplet(p, a, 0.047); float injectB = droplet(p, b, 0.041); float injectC = droplet(p, cC, 0.033); float satellite = droplet(p, 0.56 * a - 0.30 * b, 0.018); vec3 fresh = paletteM(t * 0.032 + length(a) + 0.10) * injectA; fresh += paletteM(t * 0.032 + length(b) + 0.62) * injectB; fresh += paletteM(t * 0.032 + length(cC) + 0.36) * injectC; fresh += paletteM(t * 0.08 + 0.91) * satellite * (0.45 + 0.35 * sin(t * 3.0)); float ringA = 1.0 - smoothstep(0.0, 0.018, abs(length(p - a) - 0.075)); float ringB = 1.0 - smoothstep(0.0, 0.014, abs(length(p - b) - 0.061)); fresh += paletteM(t * 0.04 + 0.24) * (ringA * 0.23 + ringB * 0.18); // --- constellation stars erupt chrome droplets (Asterism -> metal) --- for (int i = 0; i < NODES; i++) { vec2 n = node(float(i), TIME); float dn = droplet(p, n, starSize * 1.2); vec3 starHue = mix(paletteM(length(n) + t * 0.03), cyan, 0.5 * tint); fresh += starHue * dn * (0.55 + 0.35 * sin(TIME * 1.9 + float(i))); } // --- reaction fronts etch luminous, spectrally-tinted metal (chem -> metal) --- float chmB = IMG_NORM_PIXEL(chem, uv).b; float etchAmt = smoothstep(0.015, 0.52, chmB) + 0.34 * smoothstep(0.012, 0.30, vHere); fresh += palette(vHere * 3.1 + chmB * 0.40) * etchAmt * (0.50 * etch); float boundary = smoothstep(0.0, 0.03, uv.x) * smoothstep(0.0, 0.03, 1.0 - uv.x) * smoothstep(0.0, 0.03, uv.y) * smoothstep(0.0, 0.03, 1.0 - uv.y); vec3 next = max(old, fresh * (0.40 + 0.10 * sparkle)) * boundary; vec3 hot = max(next - vec3(0.70), vec3(0.0)); next = min(next, vec3(0.70)) + hot / (1.0 + 0.82 * hot); gl_FragColor = vec4(clamp(next, 0.0, 1.45), 1.0); } else { // ============================================================ // PASS 2 — COMPOSITE: chrome + chemistry woven by a plexus over deep space // ============================================================ vec2 q = isf_FragNormCoord; vec2 p = uv - 0.5; p.x *= aspect; // == Asterism centered coords float t = TIME; vec3 cyan = mix(vec3(0.2, 0.8, 1.0), vec3(0.4, 0.5, 1.0), tint); // --- liquid chrome material --- vec3 c0 = IMG_NORM_PIXEL(paint, q).rgb; vec3 cR = IMG_NORM_PIXEL(paint, q + vec2(px.x * 1.7, 0.0)).rgb; vec3 cL = IMG_NORM_PIXEL(paint, q - vec2(px.x * 1.7, 0.0)).rgb; vec3 cU = IMG_NORM_PIXEL(paint, q + vec2(0.0, px.y * 1.7)).rgb; float l = dot(c0, vec3(0.3333)); float lx = dot(cR, vec3(0.3333)); float ly = dot(cU, vec3(0.3333)); vec2 grad = vec2(lx - l, ly - l); float rim = clamp(length(grad) * 31.0, 0.0, 1.0); float reflection = 0.5 + 0.5 * sin(18.0 * q.x + 12.0 * q.y + TIME * 0.48); float glint = pow(max(0.0, reflection * rim), 3.0) * sparkle; vec3 dispersed = vec3(cR.r, c0.g, cL.b); vec3 chrome = mix(c0, dispersed, 0.42); chrome *= 0.30 + 1.38 * l; chrome += rim * paletteM(0.16 + l * 0.22) * (0.58 + 0.30 * sparkle); chrome += glint * vec3(0.95, 0.98, 1.0); chrome += pow(max(l, 0.0), 3.0) * vec3(0.75, 0.88, 1.0); // --- living chemistry emission --- vec3 chm = IMG_NORM_PIXEL(chem, q).rgb; float ink = smoothstep(0.010, 0.25, chm.g); float memoryInk = smoothstep(0.018, 0.58, chm.b); float membrane = 1.0 - smoothstep(0.0, 0.032, abs(chm.g - 0.075)); float gx = length(IMG_NORM_PIXEL(chem, q + vec2(px.x, 0.0)).rg - chm.rg); float gy = length(IMG_NORM_PIXEL(chem, q + vec2(0.0, px.y)).rg - chm.rg); float edge = clamp((gx + gy) * 18.0, 0.0, 1.0); float ripple = 0.5 + 0.5 * sin(34.0 * chm.b + 11.0 * chm.g + TIME * 0.35); vec3 spec = palette(chm.g * 3.1 + chm.r * 0.20 + chm.b * 0.18); spec *= 0.018 + 0.20 * ink + 1.08 * memoryInk; spec += palette(chm.b * 0.52 + 0.68) * memoryInk * (0.18 + 0.16 * ripple); spec += palette(chm.g * 2.0 + 0.31) * edge * 0.34; // --- alchemic field (chrome eaten & lit by chemistry) — not tonemapped yet --- float chemGlow = memoryInk * (0.6 + 0.5 * ripple) + ink * 0.35 + membrane * 0.12; vec3 field = chrome * (0.85 - 0.35 * chemGlow * fuse) + spec * (0.7 + 1.1 * fuse) + palette(chm.g * 2.0 + 0.31) * edge * membrane * 0.20 * fuse; field += vec3(0.04, 0.07, 0.12) * edge * edge; // --- deep-space constellation substrate (Asterism) --- vec3 bg = mix(vec3(0.0, 0.025, 0.06), vec3(0.0, 0.005, 0.02), length(p)); float stw = hash(floor(gl_FragCoord.xy)); bg += smoothstep(0.992, 1.0, stw) * (0.3 + 0.3 * sin(t * 2.0 + stw * 40.0)) * cyan * 0.8; float lines = 0.0, dots = 0.0; for (int i = 0; i < NODES; i++) { vec2 na = node(float(i), t); float da = length(p - na); dots += smoothstep(starSize, starSize * 0.2, da); dots += exp(-da * da / (starSize * starSize * 12.0)) * 0.4; for (int j = 0; j < NODES; j++) { if (j <= i) continue; vec2 nb = node(float(j), t); float d = length(na - nb); if (d < link) { float seg = distSeg(p, na, nb); lines += smoothstep(0.006, 0.0, seg) * smoothstep(link, link * 0.4, d); } } } vec3 plexus = cyan * lines * 0.5 * glow + cyan * dots * (0.6 + 0.6 * glow) + vec3(0.8, 0.95, 1.0) * pow(dots, 3.0) * 0.5; // --- weave: deep space + fluid field + constellation, brightest where fluid pools on nodes --- float fieldLum = clamp(dot(field, vec3(0.3333)), 0.0, 1.0); vec3 col = bg * (1.0 - 0.5 * fieldLum) + field + plexus * web * (0.5 + 0.9 * fieldLum); col *= 1.0 - 0.15 * dot(p, p); col = col / (1.0 + 0.5 * col); col = pow(max(col, 0.0), vec3(0.9)); gl_FragColor = vec4(col, 1.0); } }
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