61 lines
2.6 KiB
TypeScript
61 lines
2.6 KiB
TypeScript
"use client"
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import { useScrollProgress } from "@/hooks/use-scroll-progress"
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import { useEffect } from "react"
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// Color stops: [scrollPos, bg-L, bg-C, bg-H, fg-L, fg-C, fg-H, accent-L, accent-C, accent-H]
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// 8 sections: Hero → Legacy → Compost → Mycelium → Undernet → Anastomosis → Emergence → Network Map
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const COLOR_STOPS: number[][] = [
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[0.0, 0.08, 0.02, 30, 0.85, 0.03, 80, 0.45, 0.12, 60 ], // Hero: deep soil
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[0.10, 0.10, 0.03, 35, 0.84, 0.03, 80, 0.50, 0.13, 50 ], // Legacy: dark warm earth
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[0.20, 0.12, 0.04, 40, 0.82, 0.04, 80, 0.55, 0.15, 45 ], // Compost: earth brown
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[0.35, 0.16, 0.05, 150, 0.88, 0.05, 145, 0.55, 0.18, 155], // Mycelium: forest green
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[0.48, 0.22, 0.04, 200, 0.90, 0.03, 200, 0.50, 0.14, 220], // Undernet: deep blue
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[0.60, 0.45, 0.06, 140, 0.15, 0.03, 150, 0.65, 0.18, 145], // Anastomosis: transition
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[0.78, 0.85, 0.04, 110, 0.15, 0.04, 100, 0.60, 0.16, 90 ], // Emergence: golden light
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[0.92, 0.94, 0.02, 110, 0.12, 0.03, 100, 0.55, 0.18, 155], // Network Map: canopy
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]
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function lerp(a: number, b: number, t: number) {
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return a + (b - a) * t
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}
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function lerpHue(a: number, b: number, t: number) {
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let diff = b - a
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if (diff > 180) diff -= 360
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if (diff < -180) diff += 360
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return ((a + diff * t) % 360 + 360) % 360
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}
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function interpolateColors(progress: number) {
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let i = 0
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for (; i < COLOR_STOPS.length - 1; i++) {
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if (progress <= COLOR_STOPS[i + 1][0]) break
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}
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const stop = COLOR_STOPS[i]
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const next = COLOR_STOPS[Math.min(i + 1, COLOR_STOPS.length - 1)]
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const range = next[0] - stop[0]
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const t = range > 0 ? Math.min(1, Math.max(0, (progress - stop[0]) / range)) : 0
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return {
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bg: `oklch(${lerp(stop[1], next[1], t).toFixed(3)} ${lerp(stop[2], next[2], t).toFixed(3)} ${lerpHue(stop[3], next[3], t).toFixed(1)})`,
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fg: `oklch(${lerp(stop[4], next[4], t).toFixed(3)} ${lerp(stop[5], next[5], t).toFixed(3)} ${lerpHue(stop[6], next[6], t).toFixed(1)})`,
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accent: `oklch(${lerp(stop[7], next[7], t).toFixed(3)} ${lerp(stop[8], next[8], t).toFixed(3)} ${lerpHue(stop[9], next[9], t).toFixed(1)})`,
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}
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}
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export function ScrollProvider({ children }: { children: React.ReactNode }) {
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const progress = useScrollProgress()
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useEffect(() => {
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const { bg, fg, accent } = interpolateColors(progress)
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const root = document.documentElement
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root.style.setProperty("--scroll-bg", bg)
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root.style.setProperty("--scroll-fg", fg)
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root.style.setProperty("--scroll-accent", accent)
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root.style.setProperty("--scroll-depth", String(progress))
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}, [progress])
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return <>{children}</>
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}
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