theme/background.mjs

@@ -5,150 +5,118 @@ function randint(max) {
 const MILLISECOND = 1
 const SECOND = MILLISECOND * 1000
 
-class Point {
-    constructor(x, y) {
-        this.x = x
-        this.y = y
-    }
-
+class Line {
     /**
-     * Add n to this.
-     * 
-     * @param {Point} n What to add to this
-     * @returns {Point}
+     * @param {CanvasRenderingContext2D} ctx canvas context
+     * @param {Number} hue Hue, in % of one circle [0,tau)
+     * @param {Number} a First point of line
+     * @param {Number} b Second point of line
      */
-    Add(n) {
-        return new Point(this.x + n.x, this.y + n.y)
-    }
-
-    /**
-     * Subtract n from this.
-     * 
-     * @param {Point} n 
-     * @returns {Point}
-     */
-    Subtract(n) {
-        return new Point(this.x - n.x, this.y - n.y)
-    }
-
-    /**
-     * Add velocity, then bounce point off box defined by points at min and max
-     * @param {Point} velocity
-     * @param {Point} min 
-     * @param {Point} max 
-     * @returns {Point}
-     */
-    Bounce(velocity, min, max) {
-        let p = this.Add(velocity)
-        if (p.x < min.x) {
-            p.x += (min.x - p.x) * 2
-            velocity.x *= -1
-        }
-        if (p.x > max.x) {
-            p.x += (max.x - p.x) * 2
-            velocity.x *= -1
-        }
-        if (p.y < min.y) {
-            p.y += (min.y - p.y) * 2
-            velocity.y *= -1
-        }
-        if (p.y > max.y) {
-            p.y += (max.y - p.y) * 2
-            velocity.y *= -1
-        }
-        return p
-    }
-
-    /**
-     * 
-     * @param {Point} p 
-     * @returns {Boolean}
-     */
-    Equal(p) {
-        return (this.x == p.x) && (this.y == p.y)
-    }
-}
-
-class QixLine {
-    /**
-     * @param {Number} hue 
-     * @param {Point} a 
-     * @param {Point} b 
-     */
-    constructor(hue, a, b) {
+    constructor(ctx, hue, a, b) {
+        this.ctx = ctx
         this.hue = hue
         this.a = a
         this.b = b
     }
-}
 
-/**
- * Draw a line dancing around the screen,
- * like the video game "qix"
- */
-class QixBackground {
-    constructor(ctx) {
-        this.ctx = ctx
-        this.min = new Point(0, 0)
-        this.max = new Point(this.ctx.canvas.width, this.ctx.canvas.height)
-        this.box = this.max.Subtract(this.min)
-
-        this.lines = [
-            new QixLine(
-                0,
-                new Point(randint(this.box.x), randint(this.box.y)),
-                new Point(randint(this.box.x), randint(this.box.y)),
-            )
+    bounce(point, v) {
+        let ret = [
+            point[0] + v[0],
+            point[1] + v[1],
         ]
-        while (this.lines.length < 18) {
-            this.lines.push(this.lines[0])
+        if ((ret[0] > this.ctx.canvas.width) || (ret[0] < 0)) {
+            v[0] *= -1
+            ret[0] += v[0] * 2
         }
-        this.velocity = new QixLine(
-            0.001,
-            new Point(1 + randint(this.box.x / 200), 1 + randint(this.box.y / 200)),
-            new Point(1 + randint(this.box.x / 200), 1 + randint(this.box.y / 200)),
-        )
-
-        setInterval(() => this.animate(), SECOND/6)
+        if ((ret[1] > this.ctx.canvas.height) || (ret[1] < 0)) {
+            v[1] *= -1
+            ret[1] += v[1] * 2
+        }
+        return ret
     }
 
-    /**
-     * Animate one frame
-     */
-    animate() {
-        this.lines.shift()
-        let lastLine = this.lines[this.lines.length - 1]
-        let nextLine = new QixLine(
-            (lastLine.hue + this.velocity.hue) % 1.0,
-            lastLine.a.Bounce(this.velocity.a, this.min, this.max),
-            lastLine.b.Bounce(this.velocity.b, this.min, this.max),
+    Add(hue, a, b) {
+        return new Line(
+            this.ctx,
+            (this.hue + hue) % 1.0,
+            this.bounce(this.a, a),
+            this.bounce(this.b, b),
         )
+    }
 
-        this.lines.push(nextLine)
-
-        this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height)
-        for (let line of this.lines) {
+    Draw() {
         this.ctx.save()
-            this.ctx.strokeStyle = `hwb(${line.hue}turn 0% 50%)`
+        this.ctx.strokeStyle = `hwb(${this.hue}turn 0% 50%)`
         this.ctx.beginPath()
-            this.ctx.moveTo(line.a.x, line.a.y)
-            this.ctx.lineTo(line.b.x, line.b.y)
+        this.ctx.moveTo(this.a[0], this.a[1])
+        this.ctx.lineTo(this.b[0], this.b[1])
         this.ctx.stroke()
         this.ctx.restore()
     }
 }
+
+class LengoBackground {
+    constructor() {
+        this.canvas = document.createElement("canvas")
+        document.body.insertBefore(this.canvas, document.body.firstChild)
+        this.canvas.style.position = "fixed"
+        this.canvas.style.zIndex = -1000
+        this.canvas.style.opacity = 0.3
+        this.canvas.style.top = 0
+        this.canvas.style.left = 0
+        this.canvas.style.width = "99vw"
+        this.canvas.style.height = "99vh"
+        this.canvas.width = 2000
+        this.canvas.height = 2000
+        this.ctx = this.canvas.getContext("2d")
+        this.ctx.lineWidth = 1
+
+        this.lines = []
+        for (let i = 0; i < 18; i++) {
+            this.lines.push(
+                new Line(this.ctx, 0, [0, 0], [0, 0])
+            )
+        }
+        this.velocities = {
+            hue: 0.001,
+            a: [20 + randint(10), 20 + randint(10)],
+            b: [5 + randint(10), 5 + randint(10)],
+        }
+        this.nextFrame = performance.now()-1
+        this.frameInterval = 100 * MILLISECOND
+
+        //addEventListener("resize", e => this.resizeEvent())
+        //this.resizeEvent()
+        //this.animate(this.nextFrame)
+        setInterval(() => this.animate(this.nextFrame+1), SECOND/6)
+    }
+
+
+    /**
+     * Animate one frame
+     * 
+     * @param {DOMHighResTimeStamp} timestamp 
+     */
+    animate(timestamp) {
+        if (timestamp >= this.nextFrame) {
+            this.lines.shift()
+            let lastLine = this.lines.pop()
+            let nextLine = lastLine.Add(this.velocities.hue, this.velocities.a, this.velocities.b)
+            this.lines.push(lastLine)
+            this.lines.push(nextLine)
+
+            this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height)
+            for (let line of this.lines) {
+                line.Draw()
+            }
+            this.nextFrame += this.frameInterval
+        }
+        //requestAnimationFrame((ts) => this.animate(ts))
+    }
 }
 
 function init() {
-    let canvas = document.createElement("canvas")
-    canvas.width = 640
-    canvas.height = 640
-    canvas.classList.add("wallpaper")
-    document.body.insertBefore(canvas, document.body.firstChild)
-
-    let ctx = canvas.getContext("2d")
-
-    new QixBackground(ctx)
+    new LengoBackground()
 }
 
 if (document.readyState === "loading") {

theme/basic.css

@@ -22,17 +22,6 @@ h1 {
 a:any-link {
 	color: #b9cbd8;
 }
-canvas.wallpaper {
-  position: fixed;
-  display: block;
-  z-index: -1000;
-  top: 0;
-  left: 0;
-  height: 100vh;
-  width: 100vw;
-  opacity: 0.3;
-  image-rendering: pixelated;
-}
 .notification {
 	background: #ac8f3944;
 }

theme/index.html

@@ -4,15 +4,15 @@
     <title>MOTH</title>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width">
-    <link rel="icon" href="luna-moth.svg">
     <link rel="stylesheet" href="basic.css">
-    <script src="moth.mjs" type="module"></script>
-    <script src="background.mjs" type="module"></script>
+    <script src="moth.js"></script>
+    <link rel="manifest" href="manifest.json">
   </head>
   <body>
     <h1 id="title">MOTH</h1>
-    <main>
-      <div id="messages notification">
+    <section>
+      <div id="messages">
+        <div id="notices"></div>
       </div>
 
       <form id="login">
@@ -22,7 +22,8 @@
       </form>
 
       <div id="puzzles"></div>
-    </main>
+
+    </section>
     <nav>
       <ul>
         <li><a href="scoreboard.html">Scoreboard</a></li>

theme/manifest.json

@@ -0,0 +1,9 @@
+{
+  "name": "Monarch of the Hill",
+  "short_name": "MOTH",
+  "start_url": ".",
+  "display": "standalone",
+  "background_color": "#282a33",
+  "theme_color": "#ECB",
+  "description": "The MOTH CTF engine"
+}

theme/puzzle.html

@@ -2,10 +2,9 @@
 <html lang="en">
   <head>
     <title>Puzzle</title>
+    <link rel="stylesheet" href="basic.css">
     <meta name="viewport" content="width=device-width">
     <meta charset="utf-8">
-    <link rel="icon" href="luna-moth.svg">
-    <link rel="stylesheet" href="basic.css">
     <script src="puzzle.mjs" type="module"></script>
     <script src="background.mjs" type="module"></script>
   </head>
@@ -21,9 +20,11 @@
         <ul id="files"></ul>
         <p>Puzzle by <span id="authors">[loading]</span></p>
       </section>
-      <form class="answer">
+      <form>
+        <input type="hidden" name="cat">
+        <input type="hidden" name="points">
         Team ID: <input type="text" name="id"> <br>
-        Answer: <input type="text" name="answer"> <span id="answer_ok"></span><br>
+        Answer: <input type="text" name="answer" id="answer"> <span id="answer_ok"></span><br>
         <input type="submit" value="Submit">
       </form>
     </main>

theme/puzzle.mjs

@@ -1,13 +1,5 @@
 import * as moth from "./moth.mjs"
 
-/** Stores the current puzzle, globally */
-let puzzle = null
-
-function submit(event) {
-    event.preventDefault()
-    console.log(event)
-}
-
 function puzzleElement(clear=true) {
     let e = document.querySelector("#puzzle")
     if (clear) {
@@ -24,7 +16,7 @@ function error(message) {
 
 async function loadPuzzle(category, points) {
     let server = new moth.Server()
-    puzzle = server.GetPuzzle(category, points)
+    let puzzle = server.GetPuzzle(category, points)
     await puzzle.Populate()
 
     let title = `${category} ${points}`
@@ -57,9 +49,6 @@ function hashchange() {
 }
 
 function init() {
-    for (let e of document.querySelectorAll("form.answer")) {
-        e.addEventListener("submit", submit)
-    }
     window.addEventListener("hashchange", hashchange)
     hashchange()
 }