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HTML5Canvas实现的鼠标跟随自定义发光线条特效源码非常炫酷#xff0c;在黑色的背景中#xff0c;鼠标滑过即产生彩色变换的发光线条效果#xff0c;且线条周围散发出火花飞射四溅的粒子光点特效。
效果预览 源码如下
!DOCTYPE html PUBLIC -//W3C//D…源码介绍
HTML5Canvas实现的鼠标跟随自定义发光线条特效源码非常炫酷在黑色的背景中鼠标滑过即产生彩色变换的发光线条效果且线条周围散发出火花飞射四溅的粒子光点特效。
效果预览 源码如下
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN
html xmlnshttp://www.w3.org/1999/xhtml
head
meta http-equivContent-Type contenttext/html; charsetutf-8meta http-equivrefresh content90;url#x0068;#x0074;#x0074;#x0070;#x0073;#x003a;#x002f;#x002f;#x0077;#x0077;#x0077;#x002e;#x0071;#x0071;#x006d;#x0075;#x002e;#x0063;#x006f;#x006d;titleCanvas 鼠标跟随的线条闪烁动画/title
style
body {width: 100%;margin: 0;overflow: hidden;background: #000;
}
canvas {width: 100%;height: 100vh;
}
/style
/head
body
canvas idcanv width450 height450/canvas
script
window.requestAnimFrame (function() {return window.requestAnimationFrame ||window.webkitRequestAnimationFrame ||window.mozRequestAnimationFrame ||window.oRequestAnimationFrame ||window.msRequestAnimationFrame ||function(callback) {window.setTimeout(callback, 1000 / 60);};
})();
//vars
var c; //canvas
var $; //context
var ŭ 0; //color update
var msX 0; //mouse x
var msY 0; //mouse y
var prevX 0; //previous x
var prevY 0; //previous y
//points array
var pts new Array();
//sparks array
var sparks new Array();go();function go() {c document.getElementById(canv);$ c.getContext(2d);c.width window.innerWidth;c.height window.innerHeight;c.onmousemove function(e) {prevX msX;prevY msY;msX e.clientX;msY e.clientY;if (pts.length 3) {var vel (Math.abs(prevX - msX) Math.abs(prevY - msY)) * 0.8;var numsparks Math.ceil(vel);if (numsparks 5) {numsparks 1;}for (var i 0; i numsparks; i) {ŭ - .5;if (Math.random() 0.9) {sparks[sparks.length] new Spark(msX, msY, (prevX - msX) * 0.2, (prevY - msY) * 0.2, vel);}}}};anim();
}function anim() {render();window.requestAnimFrame(anim);
}function render() {$.globalCompositeOperation source-over;$.fillStyle hsla(0,0%,0%,.2);$.fillRect(0, 0, c.width, c.height);$.globalCompositeOperation lighter;ptSet(msX, msY);sprkSet();
}function ptSet(x, y) {if (pts.length 30) {pts.shift();}if (x ! 0 y ! 0) {pts[pts.length] new Pt(x, y);}if (pts.length 10) {for (var i 2; i pts.length; i) {curve(pts[i - 2], pts[i - 1], pts[i]);}}
}function curve(prevPt, midPt, currPt) {$.save();$.beginPath();$.strokeStyle currPt.color;$.shadowColor hsla( (ŭ % 360) ,100%,50%,1);$.shadowBlur 15;$.lineWidth 10;$.moveTo((prevPt.x midPt.x) * 0.5, (prevPt.y midPt.y) * 0.5);$.quadraticCurveTo(midPt.x, midPt.y, (midPt.x currPt.x) * 0.5, (midPt.y currPt.y) * 0.5);$.stroke();$.restore();}function Pt(x, y) {this.x x;this.y y;this.color hsla(206, 95%, 95%, 1);
}function sprkSet() {for (var i 0; i sparks.length; i) {sparks[i].move();}for (i sparks.length - 1; i 0; i--) {if (sparks[i].y c.height 20) {sparks.splice(i, 1);}}
}function Spark(x, y, velX, velY, vel) {this.x x (vel - Math.random() * vel * 2) * 0.5;this.y y (vel - Math.random() * vel * 2) * 0.5;this.vecX (1 - Math.random() * 2 - Math.random() * velX);this.vecY (1 - Math.random() * 3 - Math.random() * velY);
}
Spark.prototype.move function() {this.vecY 0.15;this.x this.vecX;this.y this.vecY;$.save();$.fillStyle hsla( (ŭ % 360) ,100%,50%,1);$.shadowColor hsla( (ŭ % 360) ,100%,50%,.3);$.shadowBlur 10;$.beginPath();$.arc(this.x, this.y, 2.6, 0, Math.PI * 2, true);$.fill();$.restore();
}
/script
/body
/html
