Управляем пучком волос на HTML5 Canvas
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<script src='https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.5/p5.js'></script> <script> new p5(); var canvas = document.createElement("canvas"), c = canvas.getContext("2d"); var w = canvas.width = window.innerWidth, h = canvas.height = window.innerHeight; document.body.appendChild(canvas); class particle { constructor(coun, ind, reso) { // this.x = Math.floor(ind%(w/reso))*reso; // this.y = Math.floor(ind/(w/reso))*reso; this.x = Math.random() * w; this.y = Math.random() * h; this.opacity = 1; //Math.random(); this.dif = Math.random() * 40 + Math.random() * 40; } show(mx, my) { this.midx = this.x - (this.x - mx) / 2; this.midy = this.y - (this.y - my) / 2; // c.beginPath(); // c.lineTo(this.midx,this.midy); // c.lineTo(mx,my); // c.strokeStyle="rgba(255,255,255,"+this.opacity+")"; // c.lineWidth="0.04"; // c.stroke(); this.dist = Math.sqrt(Math.pow(this.x - mx, 2) + Math.pow(this.y - my, 2)); c.beginPath(); //for more effects divide this.dist by bigger or smaller number. c.arc(this.midx, this.midy, Math.abs(this.dist / 2 - this.dif), 0, 2 * Math.PI); c.strokeStyle = "rgba(255,255,255," + this.opacity + ")"; c.lineWidth = "0.05"; c.stroke(); }} var res = 30, count = Math.round(w * h / (res * res)), p = new Array(count), x = w / 2, y = h / 2, x2 = w / 2, y2 = h / 2, ex = 0, ey = 0, t = 0, r1 = 10, dist = 0, q = 20; for (var i = 0; i < p.length; i++) { p[i] = new particle(count, i, res); } function draw1() { t += 0.05; x2 = w / 2 + (h / 2 - q) * Math.sqrt(2) * Math.cos(t) / (Math.pow(Math.sin(t), 2) + 1); y2 = h / 2 + (h / 2 - q) * Math.sqrt(2) * Math.cos(t) * Math.sin(t) / ( Math.pow(Math.sin(t), 2) + 1); if (mouse.x && mouse.y) { tx = mouse.x; ty = mouse.y; } else { tx = x2; ty = y2; } dist = Math.sqrt(ex * ex + ey * ey); ex = tx - x; ey = ty - y; x += ex / (w / dist); y += ey / (w / dist); for (var i = 0; i < p.length; i++) { p[i].show(x, y); } } var mouse = { x: false, y: false }; var last_mouse = { x: w / 2, y: h / 2 }; canvas.addEventListener( "mousemove", function (e) { last_mouse.x = mouse.x; last_mouse.y = mouse.y; mouse.x = e.pageX - this.offsetLeft; mouse.y = e.pageY - this.offsetTop; }, false); canvas.addEventListener("mouseleave", function (e) { mouse.x = false; mouse.y = false; }); window.requestAnimFrame = function () { return ( window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000 / 60); }); }(); function loop1() { setTimeout(function () { window.requestAnimFrame(loop1); c.fillStyle = "rgba(30,30,30,1)"; c.fillRect(0, 0, w, h); draw1(); }, 1000 / 60); } window.addEventListener("resize", function () { window.requestAnimFrame(loop1); w = canvas.width = window.innerWidth, h = canvas.height = window.innerHeight; c.fillStyle = "rgba(30,30,30,1)"; c.fillRect(0, 0, w, h); }); loop1(); </script> |
