Анимированный фон из фигур на HTML5 и jQuery
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<div class="wrapper"> <canvas id="geometric" height="300" width="450"> </canvas> <div class="accent"> </div> </div> |
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#geometric { /* border: 1px dotted #ccc; width: 100%; height: 450px; */ position: absolute; top: 0; left: 0; } .accent { /* height: 300px; display: none; */ background-color: #56AA1C; z-index: 100; position: relative; opacity: 0.9; } .controls { position: absolute; top: 20px; right: 20px; z-index: 200; } |
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<script> function setOpts(standard, user) { if (typeof user === 'object') { for (var key in user) { standard[key] = user[key]; } } } function randomNumber(min, max) { return Math.floor(Math.random() * (max - min) + min); } function drawRotatedShape(shape, x, y, width, height, degrees, color, direction) { // first save the untranslated/unrotated context context.save(); context.beginPath(); // move the rotation point to the center of the rect context.translate(x + width / 2, y + height / 2); // rotate the rect if (direction == 'clockwise') { context.rotate(degrees * Math.PI / 180); } else { context.rotate(-(degrees * Math.PI / 180)); } context.fillStyle = color; context.lineWidth = 5; // draw the rect on the transformed context // Note: after transforming [0,0] is visually [x,y] // so the rect needs to be offset accordingly when drawn switch (shape) { case 'rect': context.rect(-width / 2, -height / 2, width, height); context.fill(); break; case 'circle': context.arc(-width / 2, -height / 2, width * 0.5, 0, Math.PI * 2, true); context.fill(); break; case 'triangle': context.moveTo(0, 0); context.lineTo(width, 0); context.lineTo(width, height); context.fill(); break; case 'minus': context.moveTo(0, 0); context.lineTo(30, 0); context.stroke(); break; case 'plus': context.moveTo(0, 15); context.lineTo(30, 15); context.moveTo(15, 0); context.lineTo(15, 30); context.stroke(); break; case 'equals': context.moveTo(0, 5); context.lineTo(30, 5); context.moveTo(0, 15); context.lineTo(30, 15); context.stroke(); break; } // restore the context to its untranslated/unrotated state context.restore(); } // Initialise an empty canvas and place it on the page var canvas = document.getElementById("geometric"); var context = canvas.getContext("2d"); $(canvas).attr('width', $(window).width()).attr('height', $(window).height()); $('.accent').height($(window).height()); $(window).resize(function() { $(canvas).attr('width', $(window).width()).attr('height', $(window).height()); $('.accent').height($(window).height()); }); //$(canvas).width($(window).width()); var particles = {}, particleIndex = 0, settings; // Set up a function to create multiple particles function Particle(x, y) { // Establish starting positions and velocities this.x = x; this.y = y; // Determine original X-axis speed based on setting limitation this.vx = Math.floor(randomNumber(0, 10)); this.vy = Math.floor(randomNumber(0, 10)); this.size = Math.floor(randomNumber(settings.minSize, settings.maxSize)); this.rotation = Math.floor(randomNumber(0, 180)); if (randomNumber(0, 100) > 50) { this.rotationDirection = 'clockwise'; } else { this.rotationDirection = 'counter-clockwise'; } this.shape = settings.shapes[randomNumber(0, settings.shapes.length)]; // Add new particle to the index // Object used as it's simpler to manage that an array particleIndex++; particles[particleIndex] = this; this.id = particleIndex; this.life = 0; this.maxLife = 10000; } // Some prototype methods for the particle's "draw" function Particle.prototype.draw = function() { // this.x += 1; this.y += settings.gravity * Math.floor(randomNumber(1, 2)); // Adjust for gravity this.vy += settings.gravity * Math.floor(randomNumber(0.5, 8)); // Age the particle this.life++; if (this.rotation == 'clockwise') { this.rotation += settings.rotationVelocity; } else { this.rotation -= settings.rotationVelocity; } // If Particle is old, it goes in the chamber for renewal if (this.life >= this.maxLife) { delete particles[this.id]; } // Create the shapes var size = this.size; context.clearRect(canvas.width, canvas.height, canvas.width, canvas.height); //context.beginPath(); context.fillStyle = settings.color; //context.rect(this.x,this.y, size, size); drawRotatedShape(this.shape, this.x, this.y, size, size, this.rotation, settings.color, this.rotationDirection); //context.closePath(); //context.fill(); /* if(settings.rotation == true) { context.rotate(this.rotation); }*/ }; function shapify(preset) { switch (preset) { case 'math': settings = { density: 60, velocity: 1, //startingX: canvas.width / 2, //startingY: canvas.height / 4, gravity: -0.6, color: 'rgba(0,0,0,0.3)', maxSize: 100, minSize: 15, rotation: true, rotationVelocity: 0.1, shapes: ['rect', 'circle', 'triangle', 'plus', 'minus', 'equals'] }; break; case 'science': settings = { density: 5, velocity: 1, //startingX: canvas.width / 2, //startingY: canvas.height / 4, gravity: -0.6, color: 'rgba(0,0,0,0.3)', maxSize: 100, minSize: 15, rotation: true, rotationVelocity: 0.05, shapes: ['cell', 'dna'] }; break; } for (var i = 0; i < settings.density; i++) { new Particle(Math.floor(randomNumber(0, canvas.width)), Math.floor(randomNumber(0, canvas.height))); } for (var p in particles) { particles[p].draw(); } setInterval(function() { context.fillStyle = "#ededed"; context.fillRect(0, 0, canvas.width, canvas.height); // Draw the particles for (var i = 0; i < settings.density; i++) { if (Math.random() > 0.999) { // Introducing a random chance of creating a particle // corresponding to an chance of 1 per second, // per "density" value new Particle(Math.floor(randomNumber(0, canvas.width)), (canvas.height + 70)); } } for (var p in particles) { particles[p].draw(); } }, 30); } shapify('math'); </script> |
Автор публикации
Я не понял вашего вопроса, но постараюсь на него ответить...
Че никто не рискнул поставить? 😀
Думаю, если бы возникли вопросы, комментарии не заставили б себя долго ждать