telesoft-waves/dist/siriwave.esm.min.js

The Siri wave replicated in a JS library.

/*! *****************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
class t{constructor(t,i){this.ATT_FACTOR=4,this.GRAPH_X=2,this.AMPLITUDE_FACTOR=.6,this.ctrl=t,this.definition=i}globalAttFn(t){return Math.pow(this.ATT_FACTOR/(this.ATT_FACTOR+Math.pow(t,this.ATT_FACTOR)),this.ATT_FACTOR)}xPos(t){return this.ctrl.width*((t+this.GRAPH_X)/(2*this.GRAPH_X))}yPos(t){return this.AMPLITUDE_FACTOR*(this.globalAttFn(t)*(this.ctrl.heightMax*this.ctrl.amplitude)*(1/this.definition.attenuation)*Math.sin(this.ctrl.opt.frequency*t-this.ctrl.phase))}draw(){const{ctx:t}=this.ctrl;t.moveTo(0,0),t.beginPath();const i=this.ctrl.color.replace(/rgb\(/g,"").replace(/\)/g,"");t.strokeStyle=`rgba(${i},${this.definition.opacity})`,t.lineWidth=this.definition.lineWidth;for(let i=-this.GRAPH_X;i<=this.GRAPH_X;i+=this.ctrl.opt.pixelDepth)t.lineTo(this.xPos(i),this.ctrl.heightMax+this.yPos(i));t.stroke()}static getDefinition(){return[{attenuation:-2,lineWidth:1,opacity:.1},{attenuation:-6,lineWidth:1,opacity:.2},{attenuation:4,lineWidth:1,opacity:.4},{attenuation:2,lineWidth:1,opacity:.6},{attenuation:1,lineWidth:1.5,opacity:1}]}}class i{constructor(t,i){this.GRAPH_X=25,this.AMPLITUDE_FACTOR=.8,this.SPEED_FACTOR=1,this.DEAD_PX=2,this.ATT_FACTOR=4,this.DESPAWN_FACTOR=.02,this.NOOFCURVES_RANGES=[2,5],this.AMPLITUDE_RANGES=[.3,1],this.OFFSET_RANGES=[-3,3],this.WIDTH_RANGES=[1,3],this.SPEED_RANGES=[.5,1],this.DESPAWN_TIMEOUT_RANGES=[500,2e3],this.ctrl=t,this.definition=i,this.noOfCurves=0,this.spawnAt=0,this.prevMaxY=0,this.phases=[],this.offsets=[],this.speeds=[],this.finalAmplitudes=[],this.widths=[],this.amplitudes=[],this.despawnTimeouts=[],this.verses=[]}getRandomRange(t){return t[0]+Math.random()*(t[1]-t[0])}spawnSingle(t){this.phases[t]=0,this.amplitudes[t]=0,this.despawnTimeouts[t]=this.getRandomRange(this.DESPAWN_TIMEOUT_RANGES),this.offsets[t]=this.getRandomRange(this.OFFSET_RANGES),this.speeds[t]=this.getRandomRange(this.SPEED_RANGES),this.finalAmplitudes[t]=this.getRandomRange(this.AMPLITUDE_RANGES),this.widths[t]=this.getRandomRange(this.WIDTH_RANGES),this.verses[t]=this.getRandomRange([-1,1])}getEmptyArray(t){return new Array(t)}spawn(){this.spawnAt=Date.now(),this.noOfCurves=Math.floor(this.getRandomRange(this.NOOFCURVES_RANGES)),this.phases=this.getEmptyArray(this.noOfCurves),this.offsets=this.getEmptyArray(this.noOfCurves),this.speeds=this.getEmptyArray(this.noOfCurves),this.finalAmplitudes=this.getEmptyArray(this.noOfCurves),this.widths=this.getEmptyArray(this.noOfCurves),this.amplitudes=this.getEmptyArray(this.noOfCurves),this.despawnTimeouts=this.getEmptyArray(this.noOfCurves),this.verses=this.getEmptyArray(this.noOfCurves);for(let t=0;t<this.noOfCurves;t++)this.spawnSingle(t)}globalAttFn(t){return Math.pow(this.ATT_FACTOR/(this.ATT_FACTOR+Math.pow(t,2)),this.ATT_FACTOR)}sin(t,i){return Math.sin(t-i)}yRelativePos(t){let i=0;for(let s=0;s<this.noOfCurves;s++){let e=4*(s/(this.noOfCurves-1)*2-1);e+=this.offsets[s];const h=t*(1/this.widths[s])-e;i+=Math.abs(this.amplitudes[s]*this.sin(this.verses[s]*h,this.phases[s])*this.globalAttFn(h))}return i/this.noOfCurves}yPos(t){return this.AMPLITUDE_FACTOR*this.ctrl.heightMax*this.ctrl.amplitude*this.yRelativePos(t)*this.globalAttFn(t/this.GRAPH_X*2)}xPos(t){return this.ctrl.width*((t+this.GRAPH_X)/(2*this.GRAPH_X))}drawSupportLine(){const{ctx:t}=this.ctrl,i=[0,this.ctrl.heightMax,this.ctrl.width,1],s=t.createLinearGradient.apply(t,i);s.addColorStop(0,"transparent"),s.addColorStop(.1,"rgba(255,255,255,.5)"),s.addColorStop(.8,"rgba(255,255,255,.5)"),s.addColorStop(1,"transparent"),t.fillStyle=s,t.fillRect.apply(t,i)}draw(){const{ctx:t}=this.ctrl;if(t.globalAlpha=.7,t.globalCompositeOperation="lighter",0===this.spawnAt&&this.spawn(),this.definition.supportLine)return this.drawSupportLine();for(let t=0;t<this.noOfCurves;t++)this.spawnAt+this.despawnTimeouts[t]<=Date.now()?this.amplitudes[t]-=this.DESPAWN_FACTOR:this.amplitudes[t]+=this.DESPAWN_FACTOR,this.amplitudes[t]=Math.min(Math.max(this.amplitudes[t],0),this.finalAmplitudes[t]),this.phases[t]=(this.phases[t]+this.ctrl.speed*this.speeds[t]*this.SPEED_FACTOR)%(2*Math.PI);let i=-1/0;for(const s of[1,-1]){t.beginPath();for(let e=-this.GRAPH_X;e<=this.GRAPH_X;e+=this.ctrl.opt.pixelDepth){const h=this.xPos(e),a=this.yPos(e);t.lineTo(h,this.ctrl.heightMax-s*a),i=Math.max(i,a)}t.closePath(),t.fillStyle=`rgba(${this.definition.color}, 1)`,t.strokeStyle=`rgba(${this.definition.color}, 1)`,t.fill()}return i<this.DEAD_PX&&this.prevMaxY>i&&(this.spawnAt=0),this.prevMaxY=i,null}static getDefinition(){return[{color:"255,255,255",supportLine:!0},{color:"15, 82, 169"},{color:"173, 57, 76"},{color:"48, 220, 155"}]}}export default class{constructor(s){var{container:e}=s,h=function(t,i){var s={};for(var e in t)Object.prototype.hasOwnProperty.call(t,e)&&i.indexOf(e)<0&&(s[e]=t[e]);if(null!=t&&"function"==typeof Object.getOwnPropertySymbols){var h=0;for(e=Object.getOwnPropertySymbols(t);h<e.length;h++)i.indexOf(e[h])<0&&Object.prototype.propertyIsEnumerable.call(t,e[h])&&(s[e[h]]=t[e[h]])}return s}(s,["container"]);this.phase=0,this.run=!1,this.curves=[];const a=window.getComputedStyle(e);this.opt=Object.assign({container:e,style:"ios",ratio:window.devicePixelRatio||1,speed:.2,amplitude:1,frequency:6,color:"#fff",cover:!1,width:parseInt(a.width.replace("px",""),10),height:parseInt(a.height.replace("px",""),10),autostart:!0,pixelDepth:.02,lerpSpeed:.1},h),this.speed=Number(this.opt.speed),this.amplitude=Number(this.opt.amplitude),this.width=Number(this.opt.ratio*this.opt.width),this.height=Number(this.opt.ratio*this.opt.height),this.heightMax=Number(this.height/2)-6,this.color=`rgb(${this.hex2rgb(this.opt.color)})`,this.interpolation={speed:this.speed,amplitude:this.amplitude},this.canvas=document.createElement("canvas");const r=this.canvas.getContext("2d");if(null===r)throw new Error("Unable to create 2D Context");switch(this.ctx=r,this.canvas.width=this.width,this.canvas.height=this.height,!0===this.opt.cover?this.canvas.style.width=this.canvas.style.height="100%":(this.canvas.style.width=this.width/this.opt.ratio+"px",this.canvas.style.height=this.height/this.opt.ratio+"px"),this.opt.style){case"ios9":this.curves=(this.opt.curveDefinition||i.getDefinition()).map((t=>new i(this,t)));break;case"ios":default:this.curves=(this.opt.curveDefinition||t.getDefinition()).map((i=>new t(this,i)))}this.opt.container.appendChild(this.canvas),this.opt.autostart&&this.start()}hex2rgb(t){t=t.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i,((t,i,s,e)=>i+i+s+s+e+e));const i=/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(t);return i?`${parseInt(i[1],16).toString()},${parseInt(i[2],16).toString()},${parseInt(i[3],16).toString()}`:null}intLerp(t,i,s){return t*(1-s)+i*s}lerp(t){const i=this.interpolation[t];return null!==i&&(this[t]=this.intLerp(this[t],i,this.opt.lerpSpeed),this[t]-i==0&&(this.interpolation[t]=null)),this[t]}clear(){this.ctx.globalCompositeOperation="destination-out",this.ctx.fillRect(0,0,this.width,this.height),this.ctx.globalCompositeOperation="source-over"}draw(){this.curves.forEach((t=>t.draw()))}startDrawCycle(){this.clear(),this.lerp("amplitude"),this.lerp("speed"),this.draw(),this.phase=(this.phase+Math.PI/2*this.speed)%(2*Math.PI),window.requestAnimationFrame?this.animationFrameId=window.requestAnimationFrame(this.startDrawCycle.bind(this)):this.timeoutId=setTimeout(this.startDrawCycle.bind(this),20)}start(){if(!this.canvas)throw new Error("This instance of SiriWave has been disposed, please create a new instance");this.phase=0,this.run||(this.run=!0,this.startDrawCycle())}stop(){this.phase=0,this.run=!1,this.animationFrameId&&window.cancelAnimationFrame(this.animationFrameId),this.timeoutId&&clearTimeout(this.timeoutId)}dispose(){this.stop(),this.canvas&&(this.canvas.remove(),this.canvas=null)}set(t,i){this.interpolation[t]=i}setSpeed(t){this.set("speed",t)}setAmplitude(t){this.set("amplitude",t)}}