{ "$schema": "https://ui.shadcn.com/schema/registry-item.json", "name": "diagnostics-panel", "title": "Diagnostics Panel", "description": "Visibility-aware Canvas 2D diagnostics in layers, nodes, and flow variants.", "files": [ { "path": "src/components/effects/diagnostics-panel.tsx", "content": "\"use client\"\n\nimport * as React from \"react\"\n\n/*\n * SPDX-License-Identifier: MIT\n * Inspired by ThreeUI's Diagnostics Panel by Meng To.\n * Upstream: https://github.com/MengTo/threeui\n * Sources: src/shaders/neuform-isolated/sources/diagnostics-panel.html and\n * src/shaders/neuform-isolated/NeuformBatchEffects.tsx\n * Audited revision: fbc9b3d61b0ef4b2e93b42e4fffa617ca277429b\n * This implementation is a from-scratch Canvas 2D adaptation.\n */\n\nconst THREE_UI_NOTICE =\n \"ThreeUI © 2026 Meng To · MIT · github.com/MengTo/threeui · fbc9b3d61b0ef4b2e93b42e4fffa617ca277429b\"\n\nexport type DiagnosticsPanelVariant = \"layers\" | \"nodes\" | \"flow\"\n\nexport type DiagnosticsPanelProps = {\n variant?: DiagnosticsPanelVariant\n mode?: \"dark\" | \"light\"\n speed?: number\n size?: number\n opacity?: number\n color?: string\n className?: string\n style?: React.CSSProperties\n}\n\ntype DrawOptions = {\n width: number\n height: number\n time: number\n speed: number\n size: number\n color: string\n opacity: number\n mode: \"dark\" | \"light\"\n}\n\nfunction drawBackdrop(context: CanvasRenderingContext2D, options: DrawOptions) {\n const { width, height, mode } = options\n context.fillStyle = mode === \"dark\" ? \"#080b0a\" : \"#edf1ee\"\n context.fillRect(0, 0, width, height)\n\n context.save()\n context.strokeStyle =\n mode === \"dark\" ? \"rgba(255,255,255,.045)\" : \"rgba(20,35,29,.07)\"\n context.lineWidth = 1\n const spacing = Math.max(28, Math.min(width, height) / 10)\n for (let x = -height; x < width + height; x += spacing) {\n context.beginPath()\n context.moveTo(x, 0)\n context.lineTo(x + height, height)\n context.stroke()\n }\n for (let x = 0; x < width + height * 2; x += spacing) {\n context.beginPath()\n context.moveTo(x, 0)\n context.lineTo(x - height, height)\n context.stroke()\n }\n context.restore()\n}\n\nfunction drawDiamond(\n context: CanvasRenderingContext2D,\n centerX: number,\n centerY: number,\n width: number,\n height: number,\n fill: string,\n stroke: string\n) {\n context.beginPath()\n context.moveTo(centerX, centerY - height / 2)\n context.lineTo(centerX + width / 2, centerY)\n context.lineTo(centerX, centerY + height / 2)\n context.lineTo(centerX - width / 2, centerY)\n context.closePath()\n context.fillStyle = fill\n context.fill()\n context.strokeStyle = stroke\n context.stroke()\n}\n\nfunction drawLayers(context: CanvasRenderingContext2D, options: DrawOptions) {\n const { width, height, time, speed, size, color, opacity } = options\n const scale = Math.min(width, height) * 0.0065 * size\n const centerX = width / 2\n const centerY = height / 2 + scale * 9\n\n context.save()\n context.lineWidth = Math.max(1, scale * 0.24)\n context.globalAlpha = opacity\n for (let layer = 4; layer >= 0; layer -= 1) {\n const lift =\n layer * scale * 14 + Math.sin(time * speed + layer * 0.7) * scale * 1.8\n const ratio = 1 - layer * 0.045\n context.shadowColor = layer === 4 ? color : \"transparent\"\n context.shadowBlur = layer === 4 ? scale * 9 : 0\n drawDiamond(\n context,\n centerX,\n centerY - lift,\n scale * 88 * ratio,\n scale * 42 * ratio,\n layer === 4 ? `${color}22` : \"rgba(127,145,137,.055)\",\n layer === 4 ? color : \"rgba(143,160,152,.4)\"\n )\n }\n\n const scanY = centerY - scale * 56 + ((time * speed * 20) % (scale * 46))\n context.shadowColor = color\n context.shadowBlur = scale * 8\n context.strokeStyle = color\n context.globalAlpha = opacity * 0.72\n context.beginPath()\n context.moveTo(centerX - scale * 31, scanY)\n context.lineTo(centerX + scale * 31, scanY)\n context.stroke()\n context.restore()\n}\n\nfunction drawCube(\n context: CanvasRenderingContext2D,\n x: number,\n y: number,\n size: number,\n color: string,\n phase: number\n) {\n const vertical = size * 0.86\n const drift = Math.sin(phase) * size * 0.08\n const top = { x, y: y - vertical + drift }\n const left = { x: x - size, y: y - vertical * 0.5 + drift }\n const right = { x: x + size, y: y - vertical * 0.5 + drift }\n const bottom = { x, y: y + drift }\n const center = { x, y: y - vertical * 0.5 + drift }\n\n context.beginPath()\n context.moveTo(top.x, top.y)\n context.lineTo(right.x, right.y)\n context.lineTo(bottom.x, bottom.y)\n context.lineTo(left.x, left.y)\n context.closePath()\n context.moveTo(left.x, left.y)\n context.lineTo(center.x, center.y)\n context.lineTo(right.x, right.y)\n context.moveTo(center.x, center.y)\n context.lineTo(bottom.x, bottom.y)\n context.strokeStyle = color\n context.stroke()\n}\n\nfunction drawNodes(context: CanvasRenderingContext2D, options: DrawOptions) {\n const { width, height, time, speed, size, color, opacity } = options\n const scale = Math.min(width, height) * 0.0058 * size\n const centerX = width / 2\n const centerY = height / 2 + scale * 9\n const points = [\n [0, -26],\n [-32, -7],\n [32, -7],\n [-17, 24],\n [17, 24],\n ] as const\n\n context.save()\n context.globalAlpha = opacity\n context.lineWidth = Math.max(1, scale * 0.25)\n context.shadowColor = color\n context.shadowBlur = scale * 5\n\n context.strokeStyle = `${color}55`\n context.beginPath()\n points.forEach(([x, y], index) => {\n const pointX = centerX + x * scale\n const pointY = centerY + y * scale\n if (index === 0) context.moveTo(pointX, pointY)\n else context.lineTo(pointX, pointY)\n })\n context.stroke()\n\n points.forEach(([x, y], index) => {\n drawCube(\n context,\n centerX + x * scale,\n centerY + y * scale,\n scale * (index === 0 ? 9.8 : 7.6),\n index === 0 ? color : `${color}aa`,\n time * speed * 1.3 + index * 0.8\n )\n })\n context.restore()\n}\n\nfunction drawFlow(context: CanvasRenderingContext2D, options: DrawOptions) {\n const { width, height, time, speed, size, color, opacity, mode } = options\n const centerX = width / 2\n const centerY = height / 2\n const columns = 18\n const rows = 14\n const spanX = Math.min(width * 0.8, height * 1.22) * size\n const spanY = spanX * 0.52\n\n const project = (column: number, row: number) => {\n const nx = column / (columns - 1) - 0.5\n const ny = row / (rows - 1) - 0.5\n const distance = Math.sqrt(nx * nx + ny * ny)\n const wave =\n Math.sin(distance * 14 - time * speed * 2.4) *\n Math.max(0, 1 - distance * 1.65)\n const peak = Math.exp(-distance * distance * 18) * 0.42\n return {\n x: centerX + (nx - ny) * spanX * 0.56,\n y: centerY + (nx + ny) * spanY * 0.44 - (wave + peak) * spanY,\n energy: Math.max(0, wave + peak),\n }\n }\n\n context.save()\n context.globalAlpha = opacity\n context.lineWidth = 1\n context.lineJoin = \"round\"\n for (let row = 0; row < rows; row += 1) {\n context.beginPath()\n for (let column = 0; column < columns; column += 1) {\n const point = project(column, row)\n if (column === 0) context.moveTo(point.x, point.y)\n else context.lineTo(point.x, point.y)\n }\n context.strokeStyle =\n row === Math.floor(rows / 2)\n ? color\n : mode === \"dark\"\n ? `${color}62`\n : `${color}88`\n context.stroke()\n }\n for (let column = 0; column < columns; column += 1) {\n context.beginPath()\n for (let row = 0; row < rows; row += 1) {\n const point = project(column, row)\n if (row === 0) context.moveTo(point.x, point.y)\n else context.lineTo(point.x, point.y)\n }\n context.strokeStyle =\n column === Math.floor(columns / 2)\n ? color\n : mode === \"dark\"\n ? `${color}62`\n : `${color}88`\n context.stroke()\n }\n const focus = project(Math.floor(columns / 2), Math.floor(rows / 2))\n context.fillStyle = color\n context.shadowColor = color\n context.shadowBlur = 12\n context.beginPath()\n context.arc(focus.x, focus.y, 2.5, 0, Math.PI * 2)\n context.fill()\n context.restore()\n}\n\nconst VARIANT_LABELS: Record = {\n layers: \"Layer stack integrity\",\n nodes: \"Distributed node health\",\n flow: \"Signal topology\",\n}\n\nexport function DiagnosticsPanel({\n variant = \"layers\",\n mode = \"dark\",\n speed = 1,\n size = 1,\n opacity = 1,\n color = \"#e9854c\",\n className,\n style,\n}: DiagnosticsPanelProps) {\n const canvasRef = React.useRef(null)\n const safeSpeed = Math.max(0, Math.min(speed, 3))\n const safeSize = Math.max(0.35, Math.min(size, 2.5))\n const safeOpacity = Math.max(0.05, Math.min(opacity, 1))\n\n React.useEffect(() => {\n const canvas = canvasRef.current\n const context = canvas?.getContext(\"2d\")\n if (!canvas || !context) return\n\n let frame = 0\n let disposed = false\n let reduced = window.matchMedia(\"(prefers-reduced-motion: reduce)\").matches\n let visible = !document.hidden\n\n const draw = (timestamp = 0) => {\n if (disposed) return\n const rect = canvas.getBoundingClientRect()\n const width = Math.max(1, rect.width)\n const height = Math.max(1, rect.height)\n const pixelRatio = Math.min(window.devicePixelRatio || 1, 2)\n const nextWidth = Math.round(width * pixelRatio)\n const nextHeight = Math.round(height * pixelRatio)\n if (canvas.width !== nextWidth || canvas.height !== nextHeight) {\n canvas.width = nextWidth\n canvas.height = nextHeight\n }\n context.setTransform(pixelRatio, 0, 0, pixelRatio, 0, 0)\n drawBackdrop(context, {\n width,\n height,\n time: timestamp / 1000,\n speed: safeSpeed,\n size: safeSize,\n color,\n opacity: safeOpacity,\n mode,\n })\n const options = {\n width,\n height,\n time: timestamp / 1000,\n speed: safeSpeed,\n size: safeSize,\n color,\n opacity: safeOpacity,\n mode,\n }\n if (variant === \"nodes\") drawNodes(context, options)\n else if (variant === \"flow\") drawFlow(context, options)\n else drawLayers(context, options)\n\n if (!reduced && visible && safeSpeed > 0)\n frame = requestAnimationFrame(draw)\n }\n\n const start = () => {\n cancelAnimationFrame(frame)\n draw(reduced ? 0 : performance.now())\n }\n const visibilityChange = () => {\n visible = !document.hidden\n if (visible) start()\n else cancelAnimationFrame(frame)\n }\n const media = window.matchMedia(\"(prefers-reduced-motion: reduce)\")\n const motionChange = () => {\n reduced = media.matches\n start()\n }\n const observer = new ResizeObserver(start)\n\n observer.observe(canvas)\n document.addEventListener(\"visibilitychange\", visibilityChange)\n media.addEventListener(\"change\", motionChange)\n start()\n\n return () => {\n disposed = true\n cancelAnimationFrame(frame)\n observer.disconnect()\n document.removeEventListener(\"visibilitychange\", visibilityChange)\n media.removeEventListener(\"change\", motionChange)\n }\n }, [color, mode, safeOpacity, safeSize, safeSpeed, variant])\n\n return (\n \n \n \n
\n \n Diagnostic / 0\n {variant === \"layers\" ? 1 : variant === \"nodes\" ? 2 : 3}\n \n \n \n nominal\n \n
\n
\n
\n \n Live analysis\n

\n \n {VARIANT_LABELS[variant]}\n

\n
\n \n {safeSpeed.toFixed(2)}×\n \n
\n \n
{VARIANT_LABELS[variant]}
\n \n )\n}\n", "type": "registry:ui", "target": "src/components/effects/diagnostics-panel.tsx" } ], "meta": { "collection": "motion-effects", "license": "MIT", "source": "https://github.com/MengTo/threeui", "sourceRevision": "fbc9b3d61b0ef4b2e93b42e4fffa617ca277429b" }, "type": "registry:ui" }