ai generated solutions to our ai generated problems

frontend/Tree/FallingLeaves.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useRef } from "react";
 import { TRUNK_TOP_CSS } from "./Tree";
-// this is a comment
+
 interface Leaf {
   x: number;
   y: number;
@@ -23,24 +23,35 @@ export default function FallingLeaves({ treeRef }: { treeRef: React.RefObject<HT
     const ctx = canvas.getContext("2d")!;
     let animId: number;
     const leaves: Leaf[] = [];
-    const MAX_LEAVES = 50;
+    const MAX_LEAVES = 36;
+    const frameInterval = 1000 / 30;
+    let lastFrame = 0;
+    let isVisible = true;
+    let isRunning = false;
+    let treeBounds = { left: 0, top: 0, width: 0 };
+    let canvasBounds = { left: 0, top: 0 };
+    const reducedMotion = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
 
-    function resize() {
+    function measure() {
       const parent = canvas.parentElement;
       const rect = parent?.getBoundingClientRect();
       canvas.width = Math.max(1, Math.round(rect?.width || window.innerWidth));
       canvas.height = Math.max(1, Math.round(rect?.height || window.innerHeight));
-    }
-    resize();
-    window.addEventListener("resize", resize);
-
-    function spawnLeaf(): Leaf {
       const treeRect = treeRef.current?.getBoundingClientRect();
       const canvasRect = canvas.getBoundingClientRect();
-      const spawnY = treeRect ? treeRect.top - canvasRect.top + TRUNK_TOP_CSS : canvas.height * 0.4;
+      treeBounds = treeRect
-      const spawnX = treeRect
+        ? { left: treeRect.left, top: treeRect.top, width: treeRect.width }
-        ? treeRect.left - canvasRect.left + Math.random() * treeRect.width * 0.8 + treeRect.width * 0.1
+        : { left: canvasRect.left + canvas.width * 0.2, top: canvasRect.top + canvas.height * 0.4, width: canvas.width * 0.6 };
-        : Math.random() * canvas.width * 0.6 + canvas.width * 0.2;
+      canvasBounds = { left: canvasRect.left, top: canvasRect.top };
+    }
+    measure();
+    const resizeObserver = new ResizeObserver(measure);
+    if (canvas.parentElement) resizeObserver.observe(canvas.parentElement);
+    if (treeRef.current) resizeObserver.observe(treeRef.current);
+
+    function spawnLeaf(): Leaf {
+      const spawnY = treeBounds.top - canvasBounds.top + TRUNK_TOP_CSS;
+      const spawnX = treeBounds.left - canvasBounds.left + Math.random() * treeBounds.width * 0.8 + treeBounds.width * 0.1;
       return {
         x: spawnX,
         y: spawnY,
@@ -58,7 +69,11 @@ export default function FallingLeaves({ treeRef }: { treeRef: React.RefObject<HT
 
     let spawnTimer = 0;
 
-    function draw() {
+    function draw(timestamp: number) {
+      if (!isRunning) return;
+      animId = requestAnimationFrame(draw);
+      if (timestamp - lastFrame < frameInterval) return;
+      lastFrame = timestamp;
       ctx.clearRect(0, 0, canvas.width, canvas.height);
 
       spawnTimer++;
@@ -90,14 +105,37 @@ export default function FallingLeaves({ treeRef }: { treeRef: React.RefObject<HT
         }
       }
 
+    }
+
+    function start() {
+      if (reducedMotion || isRunning || !isVisible || document.hidden) return;
+      isRunning = true;
       animId = requestAnimationFrame(draw);
     }
 
-    draw();
+    function stop() {
+      isRunning = false;
+      if (animId) cancelAnimationFrame(animId);
+    }
+
+    const intersectionObserver = new IntersectionObserver(([entry]) => {
+      isVisible = entry.isIntersecting;
+      if (isVisible) start();
+      else stop();
+    });
+    const onVisibilityChange = () => {
+      if (document.hidden) stop();
+      else start();
+    };
+    intersectionObserver.observe(canvas);
+    document.addEventListener("visibilitychange", onVisibilityChange);
+    start();
 
     return () => {
-      cancelAnimationFrame(animId);
+      stop();
-      window.removeEventListener("resize", resize);
+      intersectionObserver.disconnect();
+      resizeObserver.disconnect();
+      document.removeEventListener("visibilitychange", onVisibilityChange);
     };
   }, []);
 

frontend/Tree/Tree.tsx

@@ -189,6 +189,23 @@ function buildTree(seed: number) {
 }
 const WOOD_COLORS = ['', '#c96303', '#c96303', '#c96303', '#321901'];
 const LEAF_COLORS = ['', '#ed5145', '#fdb068', '#fee5cd'];
+const GROUND_COLORS = ['#fee5cd', '#fdca9b', '#fdb068'];
+const GRASS_COLORS = ['#ed5145', '#fb7b04', '#c96303', '#f17c74'];
+
+function hexToRgba(hex: string) {
+  return [
+    parseInt(hex.slice(1, 3), 16),
+    parseInt(hex.slice(3, 5), 16),
+    parseInt(hex.slice(5, 7), 16),
+    255,
+  ];
+}
+
+const COLOR_RGBA = new Map(
+  [...WOOD_COLORS, ...LEAF_COLORS, ...GROUND_COLORS, ...GRASS_COLORS]
+    .filter(Boolean)
+    .map((color) => [color, hexToRgba(color)]),
+);
 
 export const TRUNK_TOP_CSS = (H - 150) + 10;
 
@@ -201,31 +218,37 @@ function renderTreeCanvas() {
   const ctx = canvas.getContext("2d")!;
   canvas.width = W * PX;
   canvas.height = H * PX;
-  ctx.clearRect(0, 0, canvas.width, canvas.height);
+  ctx.imageSmoothingEnabled = false;
 
   const { woodGrid, leafGrid } = buildTree(55);
+  const pixelCanvas = document.createElement("canvas");
+  const pixelCtx = pixelCanvas.getContext("2d")!;
+  pixelCanvas.width = W;
+  pixelCanvas.height = H;
+  const image = pixelCtx.createImageData(W, H);
+
+  function setPixel(x: number, y: number, color: string) {
+    const rgba = COLOR_RGBA.get(color)!;
+    const index = (y * W + x) * 4;
+    image.data[index] = rgba[0];
+    image.data[index + 1] = rgba[1];
+    image.data[index + 2] = rgba[2];
+    image.data[index + 3] = rgba[3];
+  }
 
   for (let y = 0; y < H; y++)
     for (let x = 0; x < W; x++) {
       const v = woodGrid[y * W + x];
-      if (v) {
+      if (v) setPixel(x, y, WOOD_COLORS[v] ?? '#321901');
-        ctx.fillStyle = WOOD_COLORS[v] ?? '#321901';
-        ctx.fillRect(x * PX, y * PX, PX, PX);
-      }
     }
 
   for (let y = 0; y < H; y++)
     for (let x = 0; x < W; x++) {
       const v = leafGrid[y * W + x];
-      if (v) {
+      if (v) setPixel(x, y, LEAF_COLORS[v]);
-        ctx.fillStyle = LEAF_COLORS[v];
-        ctx.fillRect(x * PX, y * PX, PX, PX);
-      }
     }
 
   const GROUND_Y = H - 50;
-  const groundColors = ['#fee5cd', '#fdca9b', '#fdb068'];
-  const grassColors = ['#ed5145', '#fb7b04', '#c96303', '#f17c74'];
 
   let gs = 12345;
   function grassRand() {
@@ -239,8 +262,7 @@ function renderTreeCanvas() {
     for (let y = groundTop; y < H; y++) {
       const depth = (y - groundTop) / (H - groundTop);
       const ci = depth < 0.3 ? 0 : depth < 0.7 ? 1 : 2;
-      ctx.fillStyle = groundColors[ci];
+      setPixel(x, y, GROUND_COLORS[ci]);
-      ctx.fillRect(x * PX, y * PX, PX, PX);
     }
   }
 
@@ -249,16 +271,17 @@ function renderTreeCanvas() {
     const wave = Math.sin(x * 0.05) * 3 + Math.sin(x * 0.12) * 2;
     const surfaceY = Math.round(GROUND_Y + wave);
     const bladeH = Math.floor(grassRand() * 4) + 2;
-    const color = grassColors[Math.floor(grassRand() * grassColors.length)];
+    const color = GRASS_COLORS[Math.floor(grassRand() * GRASS_COLORS.length)];
-    ctx.fillStyle = color;
     for (let b = 0; b < bladeH; b++) {
-      ctx.fillRect(x * PX, (surfaceY - b - 1) * PX, PX, PX);
+      setPixel(x, surfaceY - b - 1, color);
     }
     if (grassRand() > 0.6 && x + 1 < W) {
-      ctx.fillRect((x + 1) * PX, (surfaceY - 1) * PX, PX, PX);
+      setPixel(x + 1, surfaceY - 1, color);
     }
   }
 
+  pixelCtx.putImageData(image, 0, 0);
+  ctx.drawImage(pixelCanvas, 0, 0, canvas.width, canvas.height);
   cachedTreeCanvas = canvas;
   return canvas;
 }
@@ -272,12 +295,21 @@ const Tree = forwardRef<HTMLCanvasElement>(function Tree(_, ref) {
   const canvasRef = (ref as React.RefObject<HTMLCanvasElement>) ?? internalRef;
 
   useEffect(() => {
-    const canvas = canvasRef.current!;
+    const canvas = canvasRef.current;
-    const ctx = canvas.getContext("2d")!;
+    if (!canvas) return undefined;
+
+    const draw = () => {
+      const ctx = canvas.getContext("2d");
+      if (!ctx) return;
       canvas.width = W * PX;
       canvas.height = H * PX;
-    ctx.clearRect(0, 0, canvas.width, canvas.height);
       ctx.drawImage(renderTreeCanvas(), 0, 0);
+    };
+    const requestIdle = window.requestIdleCallback ?? ((callback) => window.setTimeout(callback, 100));
+    const cancelIdle = window.cancelIdleCallback ?? window.clearTimeout;
+    const idleId = requestIdle(draw, { timeout: 700 });
+
+    return () => cancelIdle(idleId);
   }, []);
 
   return (

frontend/src/App.jsx

@@ -1,13 +1,9 @@
-import { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
+import { useEffect, useMemo, useRef, useState } from 'react'
 import L from 'leaflet'
-import { gsap } from 'gsap'
-import { ScrollTrigger } from 'gsap/ScrollTrigger'
 import 'leaflet/dist/leaflet.css'
 import Tree, { prewarmTreeCanvas } from '../Tree/Tree'
 import FallingLeaves from '../Tree/FallingLeaves'
 
-gsap.registerPlugin(ScrollTrigger)
-
 const numberFormat = new Intl.NumberFormat('en-GB')
 const dateFormat = new Intl.DateTimeFormat('en-GB', {
   dateStyle: 'medium',
@@ -600,22 +596,33 @@ function themeToggleDockPosition(navPill) {
 function ThemeToggleMover({ dockPosition, homePosition, isHome, theme, onThemeChange }) {
   const moverRef = useRef(null)
 
-  useLayoutEffect(() => {
+  useEffect(() => {
     const mover = moverRef.current
     if (!mover) return undefined
+    let cancelled = false
+    let tween = null
+
+    async function animate() {
+      const [{ gsap }, { ScrollTrigger }] = await Promise.all([
+        import('gsap'),
+        import('gsap/ScrollTrigger'),
+      ])
+      if (cancelled) return
+
+      gsap.registerPlugin(ScrollTrigger)
 
       if (!isHome) {
-      gsap.to(mover, {
+        tween = gsap.to(mover, {
           x: dockPosition.x,
           y: dockPosition.y,
           duration: 0.56,
           ease: 'power3.out',
           overwrite: true,
         })
-      return undefined
+        return
       }
 
-    const tween = gsap.fromTo(
+      tween = gsap.fromTo(
         mover,
         { x: homePosition.x, y: homePosition.y },
         {
@@ -631,17 +638,24 @@ function ThemeToggleMover({ dockPosition, homePosition, isHome, theme, onThemeCh
           },
         },
       )
+    }
+
+    animate()
 
     return () => {
-      tween.scrollTrigger?.kill()
+      cancelled = true
-      tween.kill()
+      tween?.scrollTrigger?.kill()
+      tween?.kill()
     }
   }, [dockPosition.x, dockPosition.y, homePosition.x, homePosition.y, isHome])
 
+  const initialPosition = isHome ? homePosition : dockPosition
+
   return (
     <div
       className="theme-toggle-mover fixed left-0 top-0 z-[60]"
       ref={moverRef}
+      style={{ transform: `translate3d(${initialPosition.x}px, ${initialPosition.y}px, 0)` }}
     >
       <ThemeToggle theme={theme} onThemeChange={onThemeChange} />
     </div>
@@ -1488,7 +1502,6 @@ function AppContent() {
           dock: themeToggleDockPosition(navPillRef.current),
           home: defaultThemeTogglePosition(),
         })
-        ScrollTrigger.refresh()
       })
     }