Abstriangulation

Developer
Akimitsu Hamamuro
Size
5,794 Kb
Views
46,529

How do I make an abstriangulation?

Http://jsdo.it/akm2/wTcC. What is a abstriangulation? How do you make a abstriangulation? This script and codes were developed by Akimitsu Hamamuro on 13 June 2022, Monday.

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Abstriangulation - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Abstriangulation</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id='c'></canvas> <script src='js/kzymdn.js'></script> <script src="js/index.js"></script>
</body>
</html>

Abstriangulation - Script Codes CSS Codes

body { font-family: sans-serif; padding: 0; margin: 0;	background-color: #eff1ea;	overflow: hidden;
}

Abstriangulation - Script Codes JS Codes

/** * requestAnimationFrame */
var requestAnimationFrame = (function(){ return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000 / 60); };
})();
/** * Delaunay */
var Delaunay = (function() { /** * Node * @public */ function Node(x, y, id) { this.x = x; this.y = y; this.id = !isNaN(id) && isFinite(id) ? id : null; } Node.prototype = { eq: function(p) { var dx = this.x - p.x, dy = this.y - p.y; return (dx < 0 ? -dx : dx) < 0.0001 && (dy < 0 ? -dy : dy) < 0.0001; }, toString: function() { return '(x: ' + this.x + ', y: ' + this.y + ')'; } }; /** * Edge */ function Edge(p0, p1) { this.nodes = [p0, p1]; } Edge.prototype = { eq: function(edge) { var na = this.nodes, nb = edge.nodes; var na0 = na[0], na1 = na[1], nb0 = nb[0], nb1 = nb[1]; return (na0.eq(nb0) && na1.eq(nb1)) || (na0.eq(nb1) && na1.eq(nb0)); } }; /** * Triangle */ function Triangle(p0, p1, p2) { this.nodes = [p0, p1, p2]; this.edges = [new Edge(p0, p1), new Edge(p1, p2), new Edge(p2, p0)]; this._createId(); this._createCircumscribedCircle(); } Triangle.prototype = { id: null, _circle: null, _createId: function() { var nodes, id0, id1, id2; nodes = this.nodes; id0 = nodes[0].id; id1 = nodes[1].id; id2 = nodes[2].id; if (id0 !== null && id1 !== null && id2 !== null) { this.id = [id0, id1, id2].sort().join('_'); } }, _createCircumscribedCircle: function() { var nodes, p0, p1, p2, ax, bx, c, t, u, circle, dx, dy; nodes = this.nodes; p0 = nodes[0]; p1 = nodes[1]; p2 = nodes[2]; ax = p1.x - p0.x, ay = p1.y - p0.y; bx = p2.x - p0.x, by = p2.y - p0.y; c = 2 * (ax * by - ay * bx); t = (p1.x * p1.x - p0.x * p0.x + p1.y * p1.y - p0.y * p0.y); u = (p2.x * p2.x - p0.x * p0.x + p2.y * p2.y - p0.y * p0.y); if (!this._circle) this._circle = {}; circle = this._circle; circle.x = ((p2.y - p0.y) * t + (p0.y - p1.y) * u) / c; circle.y = ((p0.x - p2.x) * t + (p1.x - p0.x) * u) / c; dx = p0.x - circle.x; dy = p0.y - circle.y; circle.radiusSq = dx * dx + dy * dy; }, circleContains: function(p) { var circle, dx, dy, distSq; circle = this._circle; dx = circle.x - p.x, dy = circle.y - p.y; distSq = dx * dx + dy * dy; return distSq < circle.radiusSq; } }; /** * @constructor * @public */ function Delaunay(width, height) { this.width = width; this.height = height; this._triangles = null; this.clear(); } Delaunay.prototype = { clear: function() { var p0 = new Node(0, 0), p1 = new Node(this.width, 0), p2 = new Node(this.width, this.height), p3 = new Node(0, this.height); this._triangles = [ new Triangle(p0, p1, p2), new Triangle(p0, p2, p3) ]; return this; }, multipleInsert: function(m) { for (var i = 0, len = m.length; i < len; i++) { this.insert(m[i]); } return this; }, insert: function(p) { var triangles = this._triangles, t, temps = [], edges = [], edge, polygon = [], isDuplicate, i, ilen, j, jlen; for (ilen = triangles.length, i = 0; i < ilen; i++) { t = triangles[i]; if (t.circleContains(p)) { edges.push(t.edges[0], t.edges[1], t.edges[2]); } else { temps.push(t); } } edgesLoop: for (ilen = edges.length, i = 0; i < ilen; i++) { edge = edges[i]; // 辺を比較して重複していれば削除 for (jlen = polygon.length, j = 0; j < jlen; j++) { if (edge.eq(polygon[j])) { polygon.splice(j, 1); continue edgesLoop; } } polygon.push(edge); } for (ilen = polygon.length, i = 0; i < ilen; i++) { edge = polygon[i]; temps.push(new Triangle(edge.nodes[0], edge.nodes[1], p)); } this._triangles = temps; return this; }, getTriangles: function() { return this._triangles.slice(); } }; Delaunay.Node = Node; return Delaunay;
})();
/** * Particle * @super Delaunay.Node */
var Particle = (function(Node) { var currentId = 0, getId = function() { return currentId++; }; function Particle(x, y) { Node.call(this, x, y, getId()); this.vx = 0; this.vy = 0; } Particle.prototype = new Node(); return Particle;
})(Delaunay.Node);
// Initialize
(function() { // Configs var BACKGROUND_COLOR = '#eff1ea', // 背景色 LINE_COLOR = '#303030', // 線の色 FILL_COLORS = [ // 塗りに使用する色, 三角形の生成順に選択される '#00cbd6', '#83d302', '#e80051', '#2087db', '#f4d002', '#eda3d4', '#2e8720', '#ea2ebb', '#213877', '#fc771e', '#a6dbd9', '#c8e067', '#ed5131', '#e2d9d9', '#f4eea8' ], PATTERNS_URL = [ // パターンの画像 URL, 三角形の生成順に選択される 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAGCAYAAADgzO9IAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAChJREFUeNpiVFBQ2M8ABPfv33dkQAJMDDgA4////7FK4NRBugRAgAEAXhEHBXvZgh4AAAAASUVORK5CYII%3D', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAB1JREFUeNpiUFBQ2P///38GEGYEETDAxIAEAAIMACllChoZz6oRAAAAAElFTkSuQmCC', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAGCAYAAADgzO9IAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAC1JREFUeNpiVFBQ2M/AwODIgAAgPgMTNkGYBIYgSDETNkGYDgxBdKNQ7AIIMABhpgcrohF6AgAAAABJRU5ErkJggg%3D%3D', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAADJJREFUeNpi+P//PwMyVlBQ2M/EgAQUFRX3AylHJnQBEJsJXQAEGEFmIAvcv3+fASDAANwmFUHSvnUvAAAAAElFTkSuQmCC', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAGCAYAAADkOT91AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAACBJREFUeNpiUFBQ2P///38GGGZiQAOEBRhB+vCqAAgwAAmADR3HFFILAAAAAElFTkSuQmCC', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAKCAYAAACJxx+AAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAEdJREFUeNpiUlBQ2A/EDP///wdjdD4jiAME+4HYERvNxAAByIIofEaQMYqKigy4ANiE+/fvwwVAbGQ+A50ciQ8wMRAAAAEGAKNCOWlhLo6PAAAAAElFTkSuQmCC' ]; // Vars var canvas, context, screenWidth, screenHeight, screenMinSize, centerX, centerY, delaunay, particles = [], colorIndex = 0, colorTable = {}, patterns = [], patternIndex = 0, patternTable = {}, backgroundPattern, mouse = { x: 0, y: 0 }, time, gui, control, maxSpeedCtl, minSpeedCtl, img, count, onLoad, i, len; // Event Listeners function resize(e) { screenWidth = canvas.width = window.innerWidth; screenHeight = canvas.height = window.innerHeight; screenMinSize = Math.min(screenWidth, screenHeight); centerX = screenWidth * 0.5; centerY = screenHeight * 0.5; context = canvas.getContext('2d'); context.lineWidth = 3.5; context.strokeStyle = LINE_COLOR; context.lineCap = context.lineJoin = 'round'; if (delaunay) { delaunay.width = screenWidth; delaunay.height = screenHeight; } } function mouseMove(e) { mouse.x = e.clientX; mouse.y = e.clientY; } // Functions function addParticle(x, y) { if (particles.length >= control.maxNum) { particles.shift(); addParticle(x, y); return; } var p = new Particle(x, y), l = Math.random() * (control.maxSpeed - control.minSpeed) + control.minSpeed, a = Math.random() * Math.PI * 2; p.vx = l * Math.cos(a); p.vy = l * Math.sin(a); particles.push(p); } // GUI Control control = { spawnTime: 500, maxNum: 25, maxSpeed: 1, minSpeed: 0.5 }; // Init canvas = document.getElementById('c'); window.addEventListener('resize', resize, false); resize(null); mouse.x = screenWidth * 0.5; mouse.y = screenHeight * 0.5; delaunay = new Delaunay(screenWidth, screenHeight); for (i = 0, len = control.maxNum; i < len; i++) { addParticle(Math.random() * screenMinSize + centerX - screenMinSize * 0.5, Math.random() * screenMinSize + centerY - screenMinSize * 0.5); } // Loop var loop = function() { var TWO_PI = Math.PI * 2, w = screenWidth, h = screenHeight, ctx = context, now = new Date().getTime(), dx, dy, distSq, ax, ay, triangles, t, id, p0, p1, p2, ct, pt, cl, pl, i, len, p; if (now - time > control.spawnTime) { addParticle(mouse.x, mouse.y); time = now; } ctx.save(); ctx.fillStyle = BACKGROUND_COLOR; ctx.fillRect(0, 0, screenWidth, screenHeight); ctx.globalAlpha = 0.15; ctx.fillStyle = backgroundPattern; ctx.fillRect(0, 0, screenWidth, screenHeight); ctx.restore(); delaunay.clear(); for (len = particles.length, i = 0; i < len; i++) { p = particles[i]; p.x += p.vx; p.y += p.vy; // 反射 if (p.x < 0) { p.x = 0; if (p.vx < 0) p.vx *= -1; } if (p.x > w) { p.x = w; if (p.vx > 0) p.vx *= -1; } if (p.y < 0) { p.y = 0; if (p.vy < 0) p.vy *= -1; } if (p.y > h) { p.y = h; if (p.vy > 0) p.vy *= -1; } } triangles = delaunay.multipleInsert(particles).getTriangles(); ct = colorTable; pt = patternTable; cl = FILL_COLORS.length; pl = patterns.length; for (len = triangles.length, i = 0; i < len; i++) { t = triangles[i]; id = t.id; p0 = t.nodes[0]; p1 = t.nodes[1]; p2 = t.nodes[2]; if (id === null) continue; if (!ct[id]) { ct[id] = FILL_COLORS[colorIndex]; colorIndex = (colorIndex + 1) % cl; } if (!pt[id]) { pt[id] = patterns[patternIndex]; patternIndex = (patternIndex + 1) % pl; } ctx.save(); ctx.beginPath(); ctx.moveTo(p0.x, p0.y); ctx.lineTo(p1.x, p1.y); ctx.lineTo(p2.x, p2.y); ctx.closePath(); ctx.fillStyle = ct[id]; ctx.fill(); ctx.translate(p0.x, p0.y); ctx.rotate(Math.atan2(p0.y - p1.y, p0.x - p1.x)); ctx.fillStyle = pt[id]; ctx.fill(); ctx.stroke(); ctx.restore(); } requestAnimationFrame(loop); }; // GUI gui = new dat.GUI(); gui.add(control, 'maxNum', 0, 50).name('Max Num'); maxSpeedCtl = gui.add(control, 'maxSpeed', 0, 5).name('Max Speed').onChange(function() { if (control.minSpeed > control.maxSpeed) control.minSpeed = control.maxSpeed; minSpeedCtl.updateDisplay(); }); minSpeedCtl = gui.add(control, 'minSpeed', 0, 5).name('Min Speed').onChange(function() { if (control.minSpeed > control.maxSpeed) control.maxSpeed = control.minSpeed; maxSpeedCtl.updateDisplay(); }); gui.add(control, 'spawnTime', 50, 1000).name('Spawn Time'); gui.close(); // Load Images count = PATTERNS_URL.length; onLoad = function(e) { patterns.push(context.createPattern(e.target, 'repeat')); if (--count === 0) { backgroundPattern = patterns[Math.floor(patterns.length * Math.random())]; patterns.push('rgba(0, 0, 0, 0)'); canvas.addEventListener('mousemove', mouseMove, false); time = new Date().getTime(); // Start update loop(); } }; for (i = 0, len = PATTERNS_URL.length; i < len; i++) { img = new Image(); img.addEventListener('load', onLoad, false); img.src = PATTERNS_URL[i]; }
})();
Abstriangulation - Script Codes
Abstriangulation - Script Codes
Home Page Home
Developer Akimitsu Hamamuro
Username akm2
Uploaded June 13, 2022
Rating 4.5
Size 5,794 Kb
Views 46,529
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