Interactive Bezier Doodle

Developer
Francesco Trillini
Size
4,749 Kb
Views
34,408
  1. Interactive Bezier Doodle Previews
  2. Interactive Bezier Doodle HTML Codes
  3. Interactive Bezier Doodle CSS Codes
  4. Interactive Bezier Doodle JS Codes

How do I make an interactive bezier doodle?

A visual experiment with bezier curve and motion. Try to distub the doodle clicking around the screen.. What is a interactive bezier doodle? How do you make a interactive bezier doodle? This script and codes were developed by Francesco Trillini on 01 September 2022, Thursday.

Interactive Bezier Doodle Previews
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Interactive Bezier Doodle - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Interactive Bezier Doodle</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <body></body> <script src='http://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js'></script> <script src="js/index.js"></script>
</body>
</html>

Interactive Bezier Doodle - Script Codes CSS Codes

body { margin: 0px; overflow: hidden;
}

Interactive Bezier Doodle - Script Codes JS Codes

/* * Copyright MIT © <2013> <Francesco Trillini> * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and * to permit persons to whom the Software is furnished to do so, subject to the following conditions: * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ var BezierDoodle = {}; ;(function(self, undefined) {	var canvas, context, nodes = [], ripples = [], mouse = { x: 0, y: 0 }, color = { r: 0, g: 0, b: 0 }, cycle = 90, input = false, FPS = 60;	// Dat GUI default values	var reactivity = 0.5, debug = false;	/* * Settings. */	var Settings = function() {	this.reactivity = 0.5;	this.debug = false;	this.changeReactivity = function(value) {	reactivity = value;	};	this.enableDebug = function(value) {	debug = value;	};	};	/* * Init. */	function init() {	var settings = new Settings();	var GUI = new dat.GUI();	// Dat GUI main	GUI.add(settings, 'reactivity').min(0.1).max(0.5).onChange(settings.changeReactivity);	GUI.add(settings, 'debug').onChange(settings.enableDebug);	var body = document.querySelector('body');	canvas = document.createElement('canvas');	canvas.width = window.innerWidth;	canvas.height = window.innerHeight;	canvas.style.background = '-webkit-radial-gradient(#ffffff, #d1f1ff)';	canvas.style.background = '-moz-radial-gradient(#ffffff, #d1f1ff)';	canvas.style.background = '-ms-radial-gradient(#ffffff, #d1f1ff)';	canvas.style.background = '-o-radial-gradient(#ffffff, #d1f1ff)';	canvas.style.background = 'radial-gradient(#ffffff, #d1f1ff)';	canvas.style.position = 'absolute';	canvas.style.top = 0;	canvas.style.bottom = 0;	canvas.style.left = 0;	canvas.style.right = 0;	canvas.style.zIndex = -1;	canvas.style.cursor = 'pointer';	body.appendChild(canvas);	if(!!(capable)) {	context = canvas.getContext('2d');	// Events	if('ontouchstart' in window) {	canvas.addEventListener('touchstart', onTouchStart, false);	canvas.addEventListener('touchend', onTouchEnd, false);	}	else {	canvas.addEventListener('mousedown', onMouseDown, false);	canvas.addEventListener('mouseup', onMouseUp, false);	}	window.onresize = onResize;	createBezierNodes();	}	}	/* * Check if browser supports canvas element. */	function capable() {	return canvas.getContext && canvas.getContext('2d');	}	/* * On resize window event. */	function onResize() {	canvas.width = window.innerWidth;	canvas.height = window.innerHeight;	}	/* * Mouse down event. */	function onMouseDown(event) {	event.preventDefault();	mouse.x = event.pageX - canvas.offsetLeft;	mouse.y = event.pageY - canvas.offsetTop;	addRipple();	}	/* * Mouse up event. */	function onMouseUp(event) {	event.preventDefault();	input = false;	}	/* * Touch start event. */	function onTouchStart(event) {	event.preventDefault();	mouse.x = event.touches[0].pageX - canvas.offsetLeft;	mouse.y = event.touches[0].pageY - canvas.offsetTop;	addRipple();	}	/* * Touch end event. */	function onTouchEnd(event) {	event.preventDefault();	input = false;	}	/* * Let's create the basic skin of bezier curve. */	function createBezierNodes() {	updateColorCycle();	for(var quantity = 0, len = 6; quantity < len; quantity++) {	var theta = Math.PI * 2 * quantity / len;	var x = canvas.width * 0.5 + 0 * Math.cos(theta);	var y = canvas.height * 0.5 + 0 * Math.sin(theta);	nodes.push({	x: x,	y: y,	vx: 0,	vy: 0,	lastX: x,	lastY: y,	min: 150,	max: 250,	disturb: 150,	orbit: 20,	angle: Math.random() * Math.PI * 2,	speed: 0.05 + Math.random() * 0.05,	theta: theta	});	}	loop();	}	/* * Add a ripple at every input. */	function addRipple() {	input = true;	if(ripples.length === 0) {	updateColorCycle();	ripples.push({	x: mouse.x,	y: mouse.y,	reactivity: 0,	fade: 1.0	});	}	}	/* * Loop logic. */	function loop() {	clear();	update();	render();	requestAnimFrame(loop);	}	/* * Clear the whole screen. */	function clear() {	context.clearRect(0, 0, innerWidth, innerHeight);	}	/* * Update the nodes. */	function update() {	var ease = 0.01, friction = 0.98;	for(var index = 0; index < ripples.length; index++) {	var ripple = ripples[index];	ripple.reactivity += 5;	ripple.fade -= 0.05;	if(ripple.fade <= 0.0)	ripples.splice(index, 1);	}	[].forEach.call(nodes, function(node, index) {	context.clearRect(0, 0, canvas.width, canvas.height);	node.lastX += (canvas.width * 0.5 + node.disturb * Math.cos(node.theta) - node.lastX) * 0.08;	node.lastY += (canvas.height * 0.5 + node.disturb * Math.sin(node.theta) - node.lastY) * 0.08;	// Motion	node.x += ((node.lastX + Math.cos(node.angle) * node.orbit) - node.x) * 0.08;	node.y += ((node.lastY + Math.sin(node.angle) * node.orbit) - node.y) * 0.08;	// Ease	node.vx += (node.min - node.disturb) * ease;	// Friction	node.vx *= friction;	node.disturb += node.vx;	if(input)	node.disturb += (node.max - node.disturb) * reactivity;	node.angle += node.speed;	});	}	/* * Render the nodes. */	function render() {	var currentIndex, nextIndex, xc, yc;	[].forEach.call(nodes, function(node, index) {	clear();	currentIndex = nodes[nodes.length - 1];	nextIndex = nodes[0];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.5;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.5;	context.save();	context.strokeStyle = debug ? '#a9a9a9' : '#e5e5e5';	context.fillStyle = 'rgb' + '(' + color.r + ', ' + color.g + ', ' + color.b + ')';	context.globalAlpha = debug ? 1.0 : 0.5;	context.lineWidth = debug ? 1 : 5;	context.beginPath();	context.moveTo(xc, yc);	// Draw through N points	for(var N = 0; N < nodes.length; N++) {	currentIndex = nodes[N];	nextIndex = N + 1 > nodes.length - 1 ? nodes[N - nodes.length + 1] : nodes[N + 1];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.5;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.5;	context.quadraticCurveTo(currentIndex.x, currentIndex.y, xc, yc);	}	debug ? null : context.fill();	context.stroke();	context.restore();	context.save();	context.globalAlpha = 1.0;	context.lineWidth = 1;	context.lineCap = 'round';	context.lineJoin = 'round';	context.strokeStyle = '#a9a9a9';	context.fillStyle = '#a9a9a9';	// Draw through N points	for(var N = 0; N < nodes.length; N++) {	// First anchor	currentIndex = nodes[N];	nextIndex = N + 1 > nodes.length - 1 ? nodes[N - nodes.length + 1] : nodes[N + 1];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.8;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.8;	context.beginPath();	context.moveTo(xc, yc);	// Second anchor	currentIndex = nextIndex;	nextIndex = N + 2 > nodes.length - 1 ? nodes[N - nodes.length + 2] : nodes[N + 2];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.2;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.2;	context.lineTo(xc, yc);	context.stroke();	// First anchor	currentIndex = nodes[N];	nextIndex = N + 1 > nodes.length - 1 ? nodes[N - nodes.length + 1] : nodes[N + 1];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.8;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.8;	context.beginPath();	context.arc(xc, yc, 2, 0, Math.PI * 2);	context.fill();	// Second anchor	currentIndex = nextIndex;	nextIndex = N + 2 > nodes.length - 1 ? nodes[N - nodes.length + 2] : nodes[N + 2];	xc = currentIndex.x + (nextIndex.x - currentIndex.x) * 0.2;	yc = currentIndex.y + (nextIndex.y - currentIndex.y) * 0.2;	context.beginPath();	context.arc(xc, yc, 2, 0, Math.PI * 2);	context.fill();	}	context.restore();	});	for(var index = 0; index < ripples.length; index++) {	var ripple = ripples[index];	context.globalAlpha = ripple.fade;	context.fillStyle = '#ffffff';	context.beginPath();	context.arc(ripple.x, ripple.y, ripple.reactivity, 0, Math.PI * 2);	context.closePath();	context.fill();	}	}	/* * Update color cycle. */	function updateColorCycle() {	cycle = Math.min(cycle + reactivity + 0.3, 100) !== 100 ? cycle += reactivity + 0.3 : 0;	color.r = ~~(Math.sin(0.3 * cycle + 0) * 127 + 128);	color.g = ~~(Math.sin(0.3 * cycle + 2) * 127 + 128);	color.b = ~~( Math.sin(0.3 * cycle + 4) * 127 + 128);	}	window.requestAnimFrame = (function() {	return window.requestAnimationFrame ||	window.webkitRequestAnimationFrame ||	window.mozRequestAnimationFrame ||	window.oRequestAnimationFrame ||	window.msRequestAnimationFrame ||	function(callback) {	window.setTimeout(callback, 1000 / FPS);	}; })();	window.addEventListener ? window.addEventListener('load', init, false) : window.onload = init; })(BezierDoodle);
Interactive Bezier Doodle - Script Codes
Interactive Bezier Doodle - Script Codes
Home Page Home
Developer Francesco Trillini
Username Francext
Uploaded September 01, 2022
Rating 4
Size 4,749 Kb
Views 34,408
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