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<script type="text/javascript" size="150" alpha='0.3' zIndex="-2">
(function (name, factory)
{
if (typeof window === "object")
{
window[name] = factory();
}
})("Ribbons", function ()
{
var _w = window,
_b = document.body,
_d = document.documentElement;
// random helper
var random = function ()
{
if (arguments.length === 1) // only 1 argument
{
if (Array.isArray(arguments[0])) // extract index from array
{
var index = Math.round(random(0, arguments[0].length - 1));
return arguments[0][index];
}
return random(0, arguments[0]); // assume numeric
} else
if (arguments.length === 2) // two arguments range
{
return Math.random() * (arguments[1] - arguments[0]) + arguments[0];
}
return 0; // default
};
// screen helper
var screenInfo = function (e)
{
var width = Math.max(0, _w.innerWidth || _d.clientWidth || _b.clientWidth || 0),
height = Math.max(0, _w.innerHeight || _d.clientHeight || _b.clientHeight || 0),
scrollx = Math.max(0, _w.pageXOffset || _d.scrollLeft || _b.scrollLeft || 0) - (_d.clientLeft || 0),
scrolly = Math.max(0, _w.pageYOffset || _d.scrollTop || _b.scrollTop || 0) - (_d.clientTop || 0);
return {
width: width,
height: height,
ratio: width / height,
centerx: width / 2,
centery: height / 2,
scrollx: scrollx,
scrolly: scrolly };
};
// mouse/input helper
var mouseInfo = function (e)
{
var screen = screenInfo(e),
mousex = e ? Math.max(0, e.pageX || e.clientX || 0) : 0,
mousey = e ? Math.max(0, e.pageY || e.clientY || 0) : 0;
return {
mousex: mousex,
mousey: mousey,
centerx: mousex - screen.width / 2,
centery: mousey - screen.height / 2 };
};
// point object
var Point = function (x, y)
{
this.x = 0;
this.y = 0;
this.set(x, y);
};
Point.prototype = {
constructor: Point,
set: function (x, y)
{
this.x = x || 0;
this.y = y || 0;
},
copy: function (point)
{
this.x = point.x || 0;
this.y = point.y || 0;
return this;
},
multiply: function (x, y)
{
this.x *= x || 1;
this.y *= y || 1;
return this;
},
divide: function (x, y)
{
this.x /= x || 1;
this.y /= y || 1;
return this;
},
add: function (x, y)
{
this.x += x || 0;
this.y += y || 0;
return this;
},
subtract: function (x, y)
{
this.x -= x || 0;
this.y -= y || 0;
return this;
},
clampX: function (min, max)
{
this.x = Math.max(min, Math.min(this.x, max));
return this;
},
clampY: function (min, max)
{
this.y = Math.max(min, Math.min(this.y, max));
return this;
},
flipX: function ()
{
this.x *= -1;
return this;
},
flipY: function ()
{
this.y *= -1;
return this;
} };
// class constructor
var Factory = function (options)
{
this._canvas = null;
this._context = null;
this._sto = null;
this._width = 0;
this._height = 0;
this._scroll = 0;
this._ribbons = [];
this._options = {
// ribbon color HSL saturation amount
colorSaturation: "80%",
// ribbon color HSL brightness amount
colorBrightness: "60%",
// ribbon color opacity amount
colorAlpha: 0.65,
// how fast to cycle through colors in the HSL color space
colorCycleSpeed: 6,
// where to start from on the Y axis on each side (top|min, middle|center, bottom|max, random)
verticalPosition: "center",
// how fast to get to the other side of the screen
horizontalSpeed: 150,
// how many ribbons to keep on screen at any given time
ribbonCount: 3,
// add stroke along with ribbon fill colors
strokeSize: 0,
// move ribbons vertically by a factor on page scroll
parallaxAmount: -0.5,
// add animation effect to each ribbon section over time
animateSections: true };
this._onDraw = this._onDraw.bind(this);
this._onResize = this._onResize.bind(this);
this._onScroll = this._onScroll.bind(this);
this.setOptions(options);
this.init();
};
// class prototype
Factory.prototype = {
constructor: Factory,
// Set and merge local options
setOptions: function (options)
{
if (typeof options === "object")
{
for (var key in options)
{
if (options.hasOwnProperty(key))
{
this._options[key] = options[key];
}
}
}
},
// Initialize the ribbons effect
init: function ()
{
try
{
this._canvas = document.createElement("canvas");
this._canvas.style["display"] = "block";
this._canvas.style["position"] = "fixed";
this._canvas.style["margin"] = "0";
this._canvas.style["padding"] = "0";
this._canvas.style["border"] = "0";
this._canvas.style["outline"] = "0";
this._canvas.style["left"] = "0";
this._canvas.style["top"] = "0";
this._canvas.style["width"] = "100%";
this._canvas.style["height"] = "100%";
this._canvas.style["z-index"] = "-1";
this._canvas.id = "bgCanvas";
this._onResize();
this._context = this._canvas.getContext("2d");
this._context.clearRect(0, 0, this._width, this._height);
this._context.globalAlpha = this._options.colorAlpha;
window.addEventListener("resize", this._onResize);
window.addEventListener("scroll", this._onScroll);
document.body.appendChild(this._canvas);
}
catch (e) {
console.warn("Canvas Context Error: " + e.toString());
return;
}
this._onDraw();
},
// Create a new random ribbon and to the list
addRibbon: function ()
{
// movement data
var dir = Math.round(random(1, 9)) > 5 ? "right" : "left",
stop = 1000,
hide = 200,
min = 0 - hide,
max = this._width + hide,
movex = 0,
movey = 0,
startx = dir === "right" ? min : max,
starty = Math.round(random(0, this._height));
// asjust starty based on options
if (/^(top|min)$/i.test(this._options.verticalPosition))
{
starty = 0 + hide;
} else
if (/^(middle|center)$/i.test(this._options.verticalPosition))
{
starty = this._height / 2;
} else
if (/^(bottom|max)$/i.test(this._options.verticalPosition))
{
starty = this._height - hide;
}
// ribbon sections data
var ribbon = [],
point1 = new Point(startx, starty),
point2 = new Point(startx, starty),
point3 = null,
color = Math.round(random(0, 360)),
delay = 0;
// buils ribbon sections
while (true)
{
if (stop <= 0) break;stop--;
movex = Math.round((Math.random() * 1 - 0.2) * this._options.horizontalSpeed);
movey = Math.round((Math.random() * 1 - 0.5) * (this._height * 0.25));
point3 = new Point();
point3.copy(point2);
if (dir === "right")
{
point3.add(movex, movey);
if (point2.x >= max) break;
} else
if (dir === "left")
{
point3.subtract(movex, movey);
if (point2.x <= min) break;
}
// point3.clampY( 0, this._height );
ribbon.push({ // single ribbon section
point1: new Point(point1.x, point1.y),
point2: new Point(point2.x, point2.y),
point3: point3,
color: color,
delay: delay,
dir: dir,
alpha: 0,
phase: 0 });
point1.copy(point2);
point2.copy(point3);
delay += 4;
color += this._options.colorCycleSpeed;
}
this._ribbons.push(ribbon);
},
// Draw single section
_drawRibbonSection: function (section)
{
if (section)
{
if (section.phase >= 1 && section.alpha <= 0)
{
return true; // done
}
if (section.delay <= 0)
{
section.phase += 0.02;
section.alpha = Math.sin(section.phase) * 1;
section.alpha = section.alpha <= 0 ? 0 : section.alpha;
section.alpha = section.alpha >= 1 ? 1 : section.alpha;
if (this._options.animateSections)
{
var mod = Math.sin(1 + section.phase * Math.PI / 2) * 0.1;
if (section.dir === "right")
{
section.point1.add(mod, 0);
section.point2.add(mod, 0);
section.point3.add(mod, 0);
} else {
section.point1.subtract(mod, 0);
section.point2.subtract(mod, 0);
section.point3.subtract(mod, 0);
}
section.point1.add(0, mod);
section.point2.add(0, mod);
section.point3.add(0, mod);
}
} else
{section.delay -= 0.5;}
var s = this._options.colorSaturation,
l = this._options.colorBrightness,
c = "hsla(" + section.color + ", " + s + ", " + l + ", " + section.alpha + " )";
this._context.save();
if (this._options.parallaxAmount !== 0)
{
this._context.translate(0, this._scroll * this._options.parallaxAmount);
}
this._context.beginPath();
this._context.moveTo(section.point1.x, section.point1.y);
this._context.lineTo(section.point2.x, section.point2.y);
this._context.lineTo(section.point3.x, section.point3.y);
this._context.fillStyle = c;
this._context.fill();
if (this._options.strokeSize > 0)
{
this._context.lineWidth = this._options.strokeSize;
this._context.strokeStyle = c;
this._context.lineCap = "round";
this._context.stroke();
}
this._context.restore();
}
return false; // not done yet
},
// Draw ribbons
_onDraw: function ()
{
// cleanup on ribbons list to rtemoved finished ribbons
for (var i = 0, t = this._ribbons.length; i < t; ++i)
{
if (!this._ribbons[i])
{
this._ribbons.splice(i, 1);
}
}
// draw new ribbons
this._context.clearRect(0, 0, this._width, this._height);
for (var a = 0; a < this._ribbons.length; ++a) // single ribbon
{
var ribbon = this._ribbons[a],
numSections = ribbon.length,
numDone = 0;
for (var b = 0; b < numSections; ++b) // ribbon section
{
if (this._drawRibbonSection(ribbon[b]))
{
numDone++; // section done
}
}
if (numDone >= numSections) // ribbon done
{
this._ribbons[a] = null;
}
}
// maintain optional number of ribbons on canvas
if (this._ribbons.length < this._options.ribbonCount)
{
this.addRibbon();
}
requestAnimationFrame(this._onDraw);
},
// Update container size info
_onResize: function (e)
{
var screen = screenInfo(e);
this._width = screen.width;
this._height = screen.height;
if (this._canvas)
{
this._canvas.width = this._width;
this._canvas.height = this._height;
if (this._context)
{
this._context.globalAlpha = this._options.colorAlpha;
}
}
},
// Update container size info
_onScroll: function (e)
{
var screen = screenInfo(e);
this._scroll = screen.scrolly;
} };
// export
return Factory;
});
const config = {
animateSections: true,
colorAlpha: 0.5,
colorBrightness: "50%",
colorCycleSpeed: 5,
colorSaturation: "60%",
horizontalSpeed: 200,
parallaxAmount: -0.2,
ribbonCount: 3,
strokeSize: 0,
verticalPosition: "random",
};
new Ribbons();
</script>预览：
配置
- size：功能区的大小，默认值：90。
- alpha：行的不透明度（0~1），默认值：0.6。
- zIndex：z空间的索引，默认值：-1。
例：
<script type="text/javascript" size="150" alpha='0.3' zIndex="-2">js内容</script>js中参数设置1：
this._options = {
// 色带HSL饱和度
colorSaturation: "80%",
// 色带HSL亮度量
colorBrightness: "60%",
// 带状颜色不透明度
colorAlpha: 0.65,
// 在HSL颜色空间中循环显示颜色的速度有多快
colorCycleSpeed: 6,
// 从哪一侧开始Y轴 (top|min, middle|center, bottom|max, random)
verticalPosition: "center",
// 到达屏幕另一侧的速度有多快
horizontalSpeed: 200,
// 在任何给定时间，屏幕上会保留多少条带
ribbonCount: 3,
// 添加笔划以及色带填充颜色
strokeSize: 0,
// 通过页面滚动上的因子垂直移动色带
parallaxAmount: -0.5,
// 随着时间的推移，为每个功能区添加动画效果
animateSections: true
};参数设置2：
this._canvas = document.createElement("canvas");
this._canvas.style["display"] = "block";
this._canvas.style["position"] = "fixed";
this._canvas.style["margin"] = "0";
this._canvas.style["padding"] = "0";
this._canvas.style["border"] = "0";
this._canvas.style["outline"] = "0";
this._canvas.style["left"] = "0";
this._canvas.style["top"] = "0";
this._canvas.style["width"] = "100%";
this._canvas.style["height"] = "100%";
this._canvas.style["z-index"] = "-1";
this._canvas.id = "bgCanvas";
this._canvas.style["background-color"]="#1f1f1f";
this._onResize();在typecho中使用
配置好并且最小化的懒人js'
[collapse status="false" title="配置好并且最小化的懒人js"]
<script type="text/javascript" size="150" alpha='0.3' zIndex="-2">"object"==typeof window&&(window.Ribbons=function(){var t=window,i=document.body,n=document.documentElement,o=function(){if(1===arguments.length){if(Array.isArray(arguments[0])){var t=Math.round(o(0,arguments[0].length-1));return arguments[0][t]}return o(0,arguments[0])}return 2===arguments.length?Math.random()*(arguments[1]-arguments[0])+arguments[0]:0},s=function(o){var s=Math.max(0,t.innerWidth||n.clientWidth||i.clientWidth||0),h=Math.max(0,t.innerHeight||n.clientHeight||i.clientHeight||0),e=Math.max(0,t.pageXOffset||n.scrollLeft||i.scrollLeft||0)-(n.clientLeft||0),a=Math.max(0,t.pageYOffset||n.scrollTop||i.scrollTop||0)-(n.clientTop||0);return{width:s,height:h,ratio:s/h,centerx:s/2,centery:h/2,scrollx:e,scrolly:a}},h=function(t,i){this.x=0,this.y=0,this.set(t,i)};h.prototype={constructor:h,set:function(t,i){this.x=t||0,this.y=i||0},copy:function(t){return this.x=t.x||0,this.y=t.y||0,this},multiply:function(t,i){return this.x*=t||1,this.y*=i||1,this},divide:function(t,i){return this.x/=t||1,this.y/=i||1,this},add:function(t,i){return this.x+=t||0,this.y+=i||0,this},subtract:function(t,i){return this.x-=t||0,this.y-=i||0,this},clampX:function(t,i){return this.x=Math.max(t,Math.min(this.x,i)),this},clampY:function(t,i){return this.y=Math.max(t,Math.min(this.y,i)),this},flipX:function(){return this.x*=-1,this},flipY:function(){return this.y*=-1,this}};var e=function(t){this._canvas=null,this._context=null,this._sto=null,this._width=0,this._height=0,this._scroll=0,this._ribbons=[],this._options={colorSaturation:"80%",colorBrightness:"60%",colorAlpha:.65,colorCycleSpeed:6,verticalPosition:"center",horizontalSpeed:150,ribbonCount:3,strokeSize:0,parallaxAmount:-.5,animateSections:!0},this._onDraw=this._onDraw.bind(this),this._onResize=this._onResize.bind(this),this._onScroll=this._onScroll.bind(this),this.setOptions(t),this.init()};return e.prototype={constructor:e,setOptions:function(t){if("object"==typeof t)for(var i in t)t.hasOwnProperty(i)&&(this._options[i]=t[i])},init:function(){try{this._canvas=document.createElement("canvas"),this._canvas.style.display="block",this._canvas.style.position="fixed",this._canvas.style.margin="0",this._canvas.style.padding="0",this._canvas.style.border="0",this._canvas.style.outline="0",this._canvas.style.left="0",this._canvas.style.top="0",this._canvas.style.width="100%",this._canvas.style.height="100%",this._canvas.style["z-index"]="-1",this._canvas.id="bgCanvas",this._onResize(),this._context=this._canvas.getContext("2d"),this._context.clearRect(0,0,this._width,this._height),this._context.globalAlpha=this._options.colorAlpha,window.addEventListener("resize",this._onResize),window.addEventListener("scroll",this._onScroll),document.body.appendChild(this._canvas)}catch(t){return void console.warn("Canvas Context Error: "+t.toString())}this._onDraw()},addRibbon:function(){var t=Math.round(o(1,9))>5?"right":"left",i=1e3,n=this._width+200,s=0,e=0,a="right"===t?-200:n,r=Math.round(o(0,this._height));/^(top|min)$/i.test(this._options.verticalPosition)?r=200:/^(middle|center)$/i.test(this._options.verticalPosition)?r=this._height/2:/^(bottom|max)$/i.test(this._options.verticalPosition)&&(r=this._height-200);for(var l=[],c=new h(a,r),p=new h(a,r),_=null,d=Math.round(o(0,360)),u=0;!(i<=0);){if(i--,s=Math.round((1*Math.random()-.2)*this._options.horizontalSpeed),e=Math.round((1*Math.random()-.5)*(.25*this._height)),(_=new h).copy(p),"right"===t){if(_.add(s,e),p.x>=n)break}else if("left"===t&&(_.subtract(s,e),p.x<=-200))break;l.push({point1:new h(c.x,c.y),point2:new h(p.x,p.y),point3:_,color:d,delay:u,dir:t,alpha:0,phase:0}),c.copy(p),p.copy(_),u+=4,d+=this._options.colorCycleSpeed}this._ribbons.push(l)},_drawRibbonSection:function(t){if(t){if(t.phase>=1&&t.alpha<=0)return!0;if(t.delay<=0){if(t.phase+=.02,t.alpha=1*Math.sin(t.phase),t.alpha=t.alpha<=0?0:t.alpha,t.alpha=t.alpha>=1?1:t.alpha,this._options.animateSections){var i=.1*Math.sin(1+t.phase*Math.PI/2);"right"===t.dir?(t.point1.add(i,0),t.point2.add(i,0),t.point3.add(i,0)):(t.point1.subtract(i,0),t.point2.subtract(i,0),t.point3.subtract(i,0)),t.point1.add(0,i),t.point2.add(0,i),t.point3.add(0,i)}}else t.delay-=.5;var n=this._options.colorSaturation,o=this._options.colorBrightness,s="hsla("+t.color+", "+n+", "+o+", "+t.alpha+" )";this._context.save(),0!==this._options.parallaxAmount&&this._context.translate(0,this._scroll*this._options.parallaxAmount),this._context.beginPath(),this._context.moveTo(t.point1.x,t.point1.y),this._context.lineTo(t.point2.x,t.point2.y),this._context.lineTo(t.point3.x,t.point3.y),this._context.fillStyle=s,this._context.fill(),this._options.strokeSize>0&&(this._context.lineWidth=this._options.strokeSize,this._context.strokeStyle=s,this._context.lineCap="round",this._context.stroke()),this._context.restore()}return!1},_onDraw:function(){for(var t=0,i=this._ribbons.length;t<i;++t)this._ribbons[t]||this._ribbons.splice(t,1);this._context.clearRect(0,0,this._width,this._height);for(var n=0;n<this._ribbons.length;++n){for(var o=this._ribbons[n],s=o.length,h=0,e=0;e<s;++e)this._drawRibbonSection(o[e])&&h++;h>=s&&(this._ribbons[n]=null)}this._ribbons.length<this._options.ribbonCount&&this.addRibbon(),requestAnimationFrame(this._onDraw)},_onResize:function(t){var i=s();this._width=i.width,this._height=i.height,this._canvas&&(this._canvas.width=this._width,this._canvas.height=this._height,this._context&&(this._context.globalAlpha=this._options.colorAlpha))},_onScroll:function(t){var i=s();this._scroll=i.scrolly}},e}());const config={animateSections:!0,colorAlpha:.5,colorBrightness:"50%",colorCycleSpeed:5,colorSaturation:"60%",horizontalSpeed:200,parallaxAmount:-.2,ribbonCount:3,strokeSize:0,verticalPosition:"random"};new Ribbons;</script>[/collapse]
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