From a541740a29ff73e2fc910e7e2651c6de7f3966e5 Mon Sep 17 00:00:00 2001
From: Antonio De Lucreziis <antonio.delucreziis@gmail.com>
Date: Fri, 26 May 2023 18:20:47 +0200
Subject: [PATCH] website style and circuits art

---
 client/pages/index.astro       |   3 +-
 client/scripts/circuits-art.ts | 316 +++++++++++++++++++++++++++++++++
 client/styles/main.scss        |  17 +-
 package.json                   |   3 +
 pnpm-lock.yaml                 |   5 +-
 tsconfig.json                  |  29 +++
 6 files changed, 367 insertions(+), 6 deletions(-)
 create mode 100644 client/scripts/circuits-art.ts
 create mode 100644 tsconfig.json

diff --git a/client/pages/index.astro b/client/pages/index.astro
index b0ffab1..5888178 100644
--- a/client/pages/index.astro
+++ b/client/pages/index.astro
@@ -6,6 +6,7 @@ import PageLayout from '../layouts/PageLayout.astro'
     <section class="principal">
         <div class="circuit-layer">
             <canvas id="circuits-art"></canvas>
+            <script src="../scripts/circuits-art.ts"></script>
         </div>
         <div class="logo">
             <img src="/images/logo-circuit-board.svg" alt="phc logo" />
@@ -113,7 +114,7 @@ import PageLayout from '../layouts/PageLayout.astro'
             <svg width="100%" height="2rem" viewBox="0 0 1 1" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMid meet">
                 <defs>
                     <pattern id="zig-zag-2" x="0" y="0" width="2" height="1" patternUnits="userSpaceOnUse">
-                        <path fill="#ccf5ce" d="M 0,1 L 1,0 L 2,1 L 0,1"></path>
+                        <path fill="#f5f2cc" d="M 0,1 L 1,0 L 2,1 L 0,1"></path>
                     </pattern>
                 </defs>
                 <rect fill="url(#zig-zag-2)" x="0" y="0" width="1000" height="1"></rect>
diff --git a/client/scripts/circuits-art.ts b/client/scripts/circuits-art.ts
new file mode 100644
index 0000000..f5b291e
--- /dev/null
+++ b/client/scripts/circuits-art.ts
@@ -0,0 +1,316 @@
+const $canvas: HTMLCanvasElement = document.querySelector('#circuits-art')!
+
+interface Grid<T> extends Iterable<[number, number, T]> {
+    has(point: [number, number]): boolean
+    get(point: [number, number]): T
+    set(point: [number, number], value: T): void
+}
+
+function createGrid<T>(): Grid<T> {
+    const cells: Record<string, T> = {}
+
+    return {
+        has([x, y]) {
+            return cells[`${x},${y}`] !== undefined
+        },
+        get([x, y]) {
+            return cells[`${x},${y}`]
+        },
+        set([x, y], value) {
+            cells[`${x},${y}`] = value
+        },
+        *[Symbol.iterator]() {
+            for (const [coord, value] of Object.entries(cells)) {
+                const [x, y] = coord.split(',').map(s => parseInt(s))
+                yield [x, y, value]
+            }
+        },
+    }
+}
+
+type WireCell = 'down' | 'down-left' | 'down-right' | 'dot'
+
+type WireDirection = 'down' | 'down-left' | 'down-right'
+
+type WireSteps = { position: Point2; direction: WireCell }[]
+
+type Point2 = [number, number]
+
+type State = {
+    grid: Grid<WireCell>
+    queuedWire: {
+        index: number
+        steps: WireSteps
+    } | null
+    badTries: 0
+}
+
+type Renderer = {
+    timer: number
+}
+
+let renderer: Renderer | null = null
+
+const RENDERER_FPS = 30
+
+function setup() {
+    console.log('Setting up circuits art...')
+
+    $canvas.width = $canvas.clientWidth
+    $canvas.height = $canvas.clientHeight
+
+    const g = $canvas.getContext('2d')!
+    const state: State = {
+        grid: createGrid(),
+        queuedWire: null,
+        badTries: 0,
+    }
+
+    const startTime = new Date()
+
+    const handle = setInterval(() => {
+        const time = new Date().getTime() - startTime.getTime()
+
+        update(state, g.canvas.width, g.canvas.height, time)
+        render(g, state, time)
+    }, 1000 / RENDERER_FPS)
+
+    renderer = { timer: handle }
+}
+
+function update(state: State, width: number, height: number, time: number) {
+    const w = (width / CELL_SIZE) | 0
+    // const h = (height / CELL_SIZE) | 0
+
+    if (state.badTries > 1000) {
+        console.log('finished')
+        clearInterval(renderer!.timer)
+    }
+
+    if (!state.queuedWire) {
+        const sx = randomInt(0, w)
+        if (!state.grid.has([sx, 0])) {
+            const steps = generateWire(state.grid, [sx, 0])
+            if (steps.length < 7) {
+                state.badTries++
+                return
+            }
+
+            state.queuedWire = {
+                index: 0,
+                steps,
+            }
+
+            state.grid.set(state.queuedWire.steps[0].position, 'dot')
+            return
+        }
+
+        state.badTries++
+    } else {
+        const wire = state.queuedWire
+
+        const step = wire.steps[wire.index]
+        state.grid.set(step.position, step.direction)
+
+        if (wire.index + 1 < wire.steps.length) {
+            state.grid.set(wire.steps[wire.index + 1].position, 'dot')
+        }
+
+        wire.index++
+
+        if (wire.index >= wire.steps.length) {
+            state.queuedWire = null
+        }
+    }
+}
+
+const CELL_SIZE = 27
+
+const BACKGROUND_COLOR = '#ecffe3'
+const WIRE_COLOR = '#a6ce94'
+
+const RENDER_CELL: Record<WireCell, (g: CanvasRenderingContext2D) => void> = {
+    'down': g => {
+        g.strokeStyle = WIRE_COLOR
+        g.beginPath()
+        g.moveTo(0, 0)
+        g.lineTo(0, 1)
+        g.stroke()
+    },
+    'down-left': g => {
+        g.strokeStyle = WIRE_COLOR
+        g.beginPath()
+        g.moveTo(0, 0)
+        g.lineTo(-1, 1)
+        g.stroke()
+    },
+    'down-right': g => {
+        g.strokeStyle = WIRE_COLOR
+        g.beginPath()
+        g.moveTo(0, 0)
+        g.lineTo(+1, 1)
+        g.stroke()
+    },
+    'dot': g => {
+        g.fillStyle = BACKGROUND_COLOR
+        g.beginPath()
+        g.ellipse(0, 0, 0.15, 0.15, 0, 0, 2 * Math.PI)
+        g.fill()
+
+        g.strokeStyle = WIRE_COLOR
+        g.beginPath()
+        g.ellipse(0, 0, 0.15, 0.15, 0, 0, 2 * Math.PI)
+        g.stroke()
+    },
+}
+
+function render(g: CanvasRenderingContext2D, state: State, time: number) {
+    g.clearRect(0, 0, g.canvas.width, g.canvas.height)
+    g.resetTransform()
+    g.scale(CELL_SIZE, CELL_SIZE)
+    g.lineWidth = 3 / CELL_SIZE
+
+    const w = (g.canvas.width / CELL_SIZE) | 0
+    const h = (g.canvas.height / CELL_SIZE) | 0
+    for (let y = 0; y <= h + 1; y++) {
+        for (let x = 0; x <= w + 1; x++) {
+            if (!state.grid.has([x, y])) continue
+
+            const cell = state.grid.get([x, y])
+
+            g.save()
+            g.translate(x, y)
+
+            // g.fillStyle = '#f008'
+            // g.beginPath()
+            // g.rect(-0.25, -0.25, 0.5, 0.5)
+            // g.fill()
+
+            RENDER_CELL[cell](g)
+            g.restore()
+        }
+    }
+
+    // if (state.queuedWire) {
+    //     for (const step of state.queuedWire.steps) {
+    //         const [x, y] = step.position
+
+    //         g.fillStyle = '#00f8'
+    //         g.save()
+    //         g.translate(x, y)
+
+    //         g.beginPath()
+    //         g.rect(-0.25, -0.25, 0.5, 0.5)
+    //         g.fill()
+    //         g.restore()
+    //     }
+    // }
+
+    const [mx, my] = state.mouse
+    g.save()
+    g.fillStyle = '#0008'
+    g.translate(Math.floor(mx / CELL_SIZE), Math.floor(my / CELL_SIZE))
+    g.beginPath()
+    g.rect(0, 0, 1, 1)
+    g.fill()
+    g.restore()
+}
+
+setup()
+
+window.addEventListener('resize', () => {
+    if (renderer) {
+        clearInterval(renderer.timer)
+    }
+    setup()
+})
+
+function randomInt(from: number, to: number) {
+    return Math.floor(Math.random() * (to - from + 1))
+}
+
+function randomChoice<T>(choices: T[]): T {
+    return choices[randomInt(0, choices.length - 1)]
+}
+
+function randomWeightedChoice<T>(choices: [T, number][]) {
+    return
+}
+
+// 3 + 4 + 5 + 6
+randomWeightedChoice([
+    ['a', 3],
+    ['b', 4],
+    ['c', 5],
+    ['d', 6],
+])
+
+const DIR_TO_VEC: Record<WireDirection, Point2> = {
+    ['down']: [0, 1],
+    ['down-left']: [-1, 1],
+    ['down-right']: [+1, 1],
+}
+
+type ShortCircuitBoolean = boolean | (() => boolean)
+
+const callOrBoolean = (v: ShortCircuitBoolean): boolean => (typeof v === 'boolean' ? v : v())
+const implies = (a: ShortCircuitBoolean, b: ShortCircuitBoolean) => !callOrBoolean(a) || callOrBoolean(b)
+
+/**
+ * Tells whether a given direction is not blocked by some other cell in a given grid and starting position
+ */
+const DIR_AVAILABLE_PREDICATE: Record<WireDirection, (pos: Point2, grid: Grid<WireCell>) => boolean> = {
+    ['down']: ([x, y], grid) =>
+        !grid.has([x, y + 1]) &&
+        implies(grid.has([x - 1, y]), () => grid.get([x - 1, y]) !== 'down-right') &&
+        implies(grid.has([x + 1, y]), () => grid.get([x + 1, y]) !== 'down-left'),
+    ['down-left']: ([x, y], grid) => !grid.has([x - 1, y + 1]) && implies(grid.has([x - 1, y]), () => grid.get([x - 1, y]) === 'down-left'),
+    ['down-right']: ([x, y], grid) =>
+        !grid.has([x + 1, y + 1]) && implies(grid.has([x + 1, y]), () => grid.get([x + 1, y]) === 'down-right'),
+}
+
+function pruneDirections(grid: Grid<WireCell>, position: Point2, directions: WireDirection[]): WireDirection[] {
+    return directions.filter(dir => DIR_AVAILABLE_PREDICATE[dir](position, grid))
+}
+
+function generateWire(grid: Grid<WireCell>, startingPoint: Point2): { position: Point2; direction: WireCell }[] {
+    const segmentLength = Math.floor(1 - Math.random() ** 2) * 10 + 30
+    let currentPosition = startingPoint
+    let currentDirection: WireDirection = randomChoice(['down', 'down', 'down', 'down-left', 'down-right'])
+
+    const steps: { position: Point2; direction: WireCell }[] = []
+
+    for (let i = 0; i < segmentLength; i++) {
+        const availableDirections = pruneDirections(grid, currentPosition, ['down', 'down-left', 'down-right'])
+        if (availableDirections.length === 0) {
+            break
+        } else {
+            const dir =
+                availableDirections.includes(currentDirection) && Math.random() < 0.25
+                    ? currentDirection
+                    : randomChoice(availableDirections)
+
+            if ((currentDirection === 'down-left' && dir === 'down-right') || (currentDirection === 'down-right' && dir === 'down-left')) {
+                break
+            }
+
+            const [x, y] = currentPosition
+            const [dx, dy] = DIR_TO_VEC[dir]
+
+            steps.push({
+                position: [x, y],
+                direction: dir,
+            })
+
+            currentPosition = [x + dx, y + dy]
+            currentDirection = dir
+        }
+    }
+
+    const last = steps.at(-1)
+    if (last) {
+        last.direction = 'dot'
+    }
+
+    return steps
+}
diff --git a/client/styles/main.scss b/client/styles/main.scss
index 033a72d..0f6e1f6 100644
--- a/client/styles/main.scss
+++ b/client/styles/main.scss
@@ -199,7 +199,9 @@ footer {
 
         padding: 6rem 0;
 
-        background: #f0f0f0;
+        background: #ecffe3;
+        // circuit color
+        // background: #a6ce94;
 
         flex-wrap: wrap;
 
@@ -212,6 +214,13 @@ footer {
             top: 0;
             width: 100%;
             height: 100%;
+
+            padding-top: 6rem;
+
+            canvas {
+                width: 100%;
+                height: 100%;
+            }
         }
 
         .logo {
@@ -228,7 +237,7 @@ footer {
         }
 
         .whats-phc {
-            background: #e0e0e0;
+            background: #e4c5ff;
 
             border: 4px solid #222;
             border-radius: 8px;
@@ -358,7 +367,7 @@ footer {
     }
 
     section.projects {
-        background: #ccf5ce;
+        background: #f5f2cc;
 
         padding-bottom: 6rem;
 
@@ -373,7 +382,7 @@ footer {
 
             .project {
                 // background: #fcddff;
-                background: #f5cecc;
+                background: #ffa89c;
                 color: #000e;
 
                 border: 3px solid #222;
diff --git a/package.json b/package.json
index 33ad755..a9da22e 100644
--- a/package.json
+++ b/package.json
@@ -16,5 +16,8 @@
         "@fontsource/source-sans-pro": "^4.5.11",
         "astro": "^2.3.1",
         "sass": "^1.62.1"
+    },
+    "devDependencies": {
+        "typescript": "^5.0.4"
     }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 365f383..651764a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6,6 +6,7 @@ specifiers:
   '@fontsource/source-sans-pro': ^4.5.11
   astro: ^2.3.1
   sass: ^1.62.1
+  typescript: ^5.0.4
 
 dependencies:
   '@fontsource/open-sans': 4.5.14
@@ -14,6 +15,9 @@ dependencies:
   astro: 2.3.1_sass@1.62.1
   sass: 1.62.1
 
+devDependencies:
+  typescript: 5.0.4
+
 packages:
 
   /@ampproject/remapping/2.2.1:
@@ -2737,7 +2741,6 @@ packages:
     resolution: {integrity: sha512-cW9T5W9xY37cc+jfEnaUvX91foxtHkza3Nw3wkoF4sSlKn0MONdkdEndig/qPBWXNkmplh3NzayQzCiHM4/hqw==}
     engines: {node: '>=12.20'}
     hasBin: true
-    dev: false
 
   /undici/5.20.0:
     resolution: {integrity: sha512-J3j60dYzuo6Eevbawwp1sdg16k5Tf768bxYK4TUJRH7cBM4kFCbf3mOnM/0E3vQYXvpxITbbWmBafaDbxLDz3g==}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..8f37265
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,29 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "compilerOptions": {
+        // Enable top-level await, and other modern ESM features.
+        "target": "ESNext",
+        "module": "ESNext",
+        // Enable node-style module resolution, for things like npm package imports.
+        "moduleResolution": "node",
+        // Enable JSON imports.
+        "resolveJsonModule": true,
+        // Enable stricter transpilation for better output.
+        "isolatedModules": true,
+        // Astro directly run TypeScript code, no transpilation needed.
+        "noEmit": true,
+        "strictNullChecks": true,
+        // Report an error when importing a file using a casing different from the casing on disk.
+        "forceConsistentCasingInFileNames": true,
+        // Properly support importing CJS modules in ESM
+        "esModuleInterop": true,
+        // Skip typechecking libraries and .d.ts files
+        "skipLibCheck": true,
+        // Add alias for assets folder for easy reference to assets
+        "baseUrl": ".",
+        "paths": {},
+        // TypeScript 5.0 changed how `isolatedModules` and `importsNotUsedAsValues` works, deprecating the later
+        // Until the majority of users are on TypeScript 5.0, we'll have to supress those deprecation errors
+        "ignoreDeprecations": "5.0"
+    }
+}