D3 force demo

README.md

Simple demo of D3 (v4) force simulation

d3.min.js

// https://d3js.org Version 4.2.1. Copyright 2016 Mike Bostock.
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t&&[[n[0][0],t[0]],[n[1][0],t[1]]]},output:function(t){return t&&[t[0][1],t[1][1]]}},lx={name:"xy",handles:["n","e","s","w","nw","ne","se","sw"].map(zl),input:function(t){return t},output:function(t){return t}},hx={overlay:"crosshair",selection:"move",n:"ns-resize",e:"ew-resize",s:"ns-resize",w:"ew-resize",nw:"nwse-resize",ne:"nesw-resize",se:"nwse-resize",sw:"nesw-resize"},px={e:"w",w:"e",nw:"ne",ne:"nw",se:"sw",sw:"se"},dx={n:"s",s:"n",nw:"sw",ne:"se",se:"ne",sw:"nw"},vx={overlay:1,selection:1,n:null,e:1,s:null,w:-1,nw:-1,ne:1,se:1,sw:-1},_x={overlay:1,selection:1,n:-1,e:null,s:1,w:null,nw:-1,ne:-1,se:1,sw:1},yx=Math.cos,gx=Math.sin,mx=Math.PI,xx=mx/2,bx=2*mx,wx=Math.max,Mx=Array.prototype.slice;Jl.prototype={constructor:Jl,reset:function(){this.s=this.t=0},add:function(t){Ql(nb,t,this.t),Ql(this,nb.s,this.s),this.s?this.t+=nb.t:this.s=nb.t},valueOf:function(){return this.s}};var Tx,kx,Sx,Nx,Ax,Ex,Cx,zx,Px,qx,Lx,Rx,Ux,Dx,Ox,Fx,Ix,Yx,Bx,jx,Hx,Xx,Vx,Wx,$x,Zx,Gx,Jx,Qx,Kx,tb,nb=new Jl,eb=1e-6,rb=1e-12,ib=Math.PI,ob=ib/2,ub=ib/4,ab=2*ib,cb=180/ib,sb=ib/180,fb=Math.abs,lb=Math.atan,hb=Math.atan2,pb=Math.cos,db=Math.ceil,vb=Math.exp,_b=Math.log,yb=Math.pow,gb=Math.sin,mb=Math.sign||function(t){return t>0?1:t<0?-1:0},xb=Math.sqrt,bb=Math.tan,wb={Feature:function(t,n){rh(t.geometry,n)},FeatureCollection:function(t,n){for(var e=t.features,r=-1,i=e.length;++r<i;)rh(e[r].geometry,n)}},Mb={Sphere:function(t,n){n.sphere()},Point:function(t,n){t=t.coordinates,n.point(t[0],t[1],t[2])},MultiPoint:function(t,n){for(var e=t.coordinates,r=-1,i=e.length;++r<i;)t=e[r],n.point(t[0],t[1],t[2])},LineString:function(t,n){ih(t.coordinates,n,0)},MultiLineString:function(t,n){for(var e=t.coordinates,r=-1,i=e.length;++r<i;)ih(e[r],n,0)},Polygon:function(t,n){oh(t.coordinates,n)},MultiPolygon:function(t,n){for(var e=t.coordinates,r=-1,i=e.length;++r<i;)oh(e[r],n)},GeometryCollection:function(t,n){for(var e=t.geometries,r=-1,i=e.length;++r<i;)rh(e[r],n)}},Tb=Gl(),kb=Gl(),Sb={point:eh,lineStart:eh,lineEnd:eh,polygonStart:function(){Tb.reset(),Sb.lineStart=ah,Sb.lineEnd=ch},polygonEnd:function(){var t=+Tb;kb.add(t<0?ab+t:t),this.lineStart=this.lineEnd=this.point=eh},sphere:function(){kb.add(ab)}},Nb=Gl(),Ab={point:mh,lineStart:bh,lineEnd:wh,polygonStart:function(){Ab.point=Mh,Ab.lineStart=Th,Ab.lineEnd=kh,Nb.reset(),Sb.polygonStart()},polygonEnd:function(){Sb.polygonEnd(),Ab.point=mh,Ab.lineStart=bh,Ab.lineEnd=wh,Tb<0?(Ex=-(zx=180),Cx=-(Px=90)):Nb>eb?Px=90:Nb<-eb&&(Cx=-90),Ox[0]=Ex,Ox[1]=zx}},Eb={sphere:eh,point:Ch,lineStart:Ph,lineEnd:Rh,polygonStart:function(){Eb.lineStart=Uh,Eb.lineEnd=Dh},polygonEnd:function(){Eb.lineStart=Ph,Eb.lineEnd=Rh}};jh.invert=jh;var Cb,zb,Pb,qb,Lb,Rb,Ub,Db,Ob,Fb,Ib,Yb=1e9,Bb=-Yb,jb=Gl(),Hb={sphere:eh,point:eh,lineStart:up,lineEnd:eh,polygonStart:eh,polygonEnd:eh},Xb=[null,null],Vb={type:"LineString",coordinates:Xb},Wb=Gl(),$b=Gl(),Zb={point:eh,lineStart:eh,lineEnd:eh,polygonStart:function(){Zb.lineStart=yp,Zb.lineEnd=xp},polygonEnd:function(){Zb.lineStart=Zb.lineEnd=Zb.point=eh,Wb.add(fb($b)),$b.reset()},result:function(){var t=Wb/2;return Wb.reset(),t}},Gb=1/0,Jb=Gb,Qb=-Gb,Kb=Qb,tw={point:bp,lineStart:eh,lineEnd:eh,polygonStart:eh,polygonEnd:eh,result:function(){var t=[[Gb,Jb],[Qb,Kb]];return Qb=Kb=-(Jb=Gb=1/0),t}},nw=0,ew=0,rw=0,iw=0,ow=0,uw=0,aw=0,cw=0,sw=0,fw={point:wp,lineStart:Mp,lineEnd:Sp,polygonStart:function(){fw.lineStart=Np,fw.lineEnd=Ap},polygonEnd:function(){fw.point=wp,fw.lineStart=Mp,fw.lineEnd=Sp},result:function(){var t=sw?[aw/sw,cw/sw]:uw?[iw/uw,ow/uw]:rw?[nw/rw,ew/rw]:[NaN,NaN];return nw=ew=rw=iw=ow=uw=aw=cw=sw=0,t}},lw=Gl(),hw=Up(function(){return!0},Fp,Yp,[-ib,-ob]);Xp.prototype={point:function(t,n){this.stream.point(t,n)},sphere:function(){this.stream.sphere()},lineStart:function(){this.stream.lineStart()},lineEnd:function(){this.stream.lineEnd()},polygonStart:function(){this.stream.polygonStart()},polygonEnd:function(){this.stream.polygonEnd()}};var pw=16,dw=pb(30*sb),vw=Hp({point:function(t,n){this.stream.point(t*sb,n*sb)}}),_w=ud(function(t){return xb(2/(1+t))});_w.invert=ad(function(t){return 2*th(t/2)});var yw=ud(function(t){return(t=Kl(t))&&t/gb(t)});yw.invert=ad(function(t){return t}),fd.invert=function(t,n){return[t,2*lb(vb(n))-ob]},_d.invert=_d,xd.invert=ad(lb),wd.invert=ad(th),Td.invert=ad(function(t){return 2+lb(t)}),Sd.invert=function(t,n){return[-n,2*lb(vb(t))-ob]},t.version=Ad,t.bisect=Cd,t.bisectRight=Cd,t.bisectLeft=zd,t.ascending=n,t.bisector=e,t.descending=i,t.deviation=a,t.extent=c,t.histogram=v,t.thresholdFreedmanDiaconis=y,t.thresholdScott=g,t.thresholdSturges=d,t.max=m,t.mean=x,t.median=b,t.merge=w,t.min=M,t.pairs=T,t.permute=k,t.quantile=_,t.range=l,t.scan=S,t.shuffle=N,t.sum=A,t.ticks=h,t.tickStep=p,t.transpose=E,t.variance=u,t.zip=z,t.entries=j,t.keys=Y,t.values=B,t.map=q,t.set=I,t.nest=L,t.randomUniform=H,t.randomNormal=X,t.randomLogNormal=V,t.randomBates=$,t.randomIrwinHall=W,t.randomExponential=Z,t.easeLinear=G,t.easeQuad=K,t.easeQuadIn=J,t.easeQuadOut=Q,t.easeQuadInOut=K,t.easeCubic=et,t.easeCubicIn=tt,t.easeCubicOut=nt,t.easeCubicInOut=et,t.easePoly=jd,t.easePolyIn=Yd,t.easePolyOut=Bd,t.easePolyInOut=jd,t.easeSin=ot,t.easeSinIn=rt,t.easeSinOut=it,t.easeSinInOut=ot,t.easeExp=ct,t.easeExpIn=ut,t.easeExpOut=at,t.easeExpInOut=ct,t.easeCircle=lt,t.easeCircleIn=st,t.easeCircleOut=ft,t.easeCircleInOut=lt,t.easeBounce=pt,t.easeBounceIn=ht,t.easeBounceOut=pt,t.easeBounceInOut=dt,t.easeBack=ov,t.easeBackIn=rv,t.easeBackOut=iv,t.easeBackInOut=ov,t.easeElastic=fv,t.easeElasticIn=sv,t.easeElasticOut=fv,t.easeElasticInOut=lv,t.polygonArea=vt,t.polygonCentroid=_t,t.polygonHull=xt,t.polygonContains=bt,t.polygonLength=wt,t.path=Tt,t.quadtree=jt,t.queue=Qt,t.arc=sn,t.area=vn,t.line=dn,t.pie=gn,t.radialArea=Mn,t.radialLine=wn,t.symbol=Tn,t.symbols=Bv,t.symbolCircle=Tv,t.symbolCross=kv,t.symbolDiamond=Av,t.symbolSquare=Lv,t.symbolStar=qv,t.symbolTriangle=Uv,t.symbolWye=Yv,t.curveBasisClosed=Cn,t.curveBasisOpen=Pn,t.curveBasis=An,t.curveBundle=jv,t.curveCardinalClosed=Xv,t.curveCardinalOpen=Vv,t.curveCardinal=Hv,t.curveCatmullRomClosed=$v,t.curveCatmullRomOpen=Zv,t.curveCatmullRom=Wv,t.curveLinearClosed=jn,t.curveLinear=ln,t.curveMonotoneX=Jn,t.curveMonotoneY=Qn,t.curveNatural=ne,t.curveStep=re,t.curveStepAfter=oe,t.curveStepBefore=ie,t.stack=se,t.stackOffsetExpand=fe,t.stackOffsetNone=ue,t.stackOffsetSilhouette=le,t.stackOffsetWiggle=he,t.stackOrderAscending=pe,t.stackOrderDescending=ve,t.stackOrderInsideOut=_e,t.stackOrderNone=ae,t.stackOrderReverse=ye,t.color=be,t.rgb=ke,t.hsl=Ee,t.lab=qe,t.hcl=Ie,t.cubehelix=je,t.interpolate=cr,t.interpolateArray=nr,t.interpolateDate=er,t.interpolateNumber=rr,t.interpolateObject=ir,t.interpolateRound=sr,t.interpolateString=ar,t.interpolateTransformCss=D_,t.interpolateTransformSvg=O_,t.interpolateZoom=yr,t.interpolateRgb=C_,t.interpolateRgbBasis=z_,t.interpolateRgbBasisClosed=P_,t.interpolateHsl=j_,t.interpolateHslLong=H_,t.interpolateLab=mr,t.interpolateHcl=X_,t.interpolateHclLong=V_,t.interpolateCubehelix=W_,t.interpolateCubehelixLong=$_,t.interpolateBasis=Ve,t.interpolateBasisClosed=We,t.quantize=wr,t.dispatch=Mr,t.dsvFormat=zr,t.csvParse=K_,t.csvParseRows=ty,t.csvFormat=ny,t.csvFormatRows=ey,t.tsvParse=iy,t.tsvParseRows=oy,t.tsvFormat=uy,t.tsvFormatRows=ay,t.request=Pr,t.html=cy,t.json=sy,t.text=fy,t.xml=ly,t.csv=hy,t.tsv=py,t.now=Or,t.timer=Yr,t.timerFlush=Br,t.timeout=Wr,t.interval=$r,t.timeInterval=Zr,t.timeMillisecond=ky,t.timeMilliseconds=Sy,t.timeSecond=Py,t.timeSeconds=qy,t.timeMinute=Ly,t.timeMinutes=Ry,t.timeHour=Uy,t.timeHours=Dy,t.timeDay=Oy,t.timeDays=Fy,t.timeWeek=Iy;t.timeWeeks=Wy;t.timeSunday=Iy,t.timeSundays=Wy,t.timeMonday=Yy,t.timeMondays=$y,t.timeTuesday=By,t.timeTuesdays=Zy,t.timeWednesday=jy,t.timeWednesdays=Gy,t.timeThursday=Hy,t.timeThursdays=Jy,t.timeFriday=Xy,t.timeFridays=Qy,t.timeSaturday=Vy,t.timeSaturdays=Ky,t.timeMonth=tg,t.timeMonths=ng,t.timeYear=eg,t.timeYears=rg,t.utcMillisecond=ky,t.utcMilliseconds=Sy,t.utcSecond=Py,t.utcSeconds=qy,t.utcMinute=ig,t.utcMinutes=og,t.utcHour=ug,t.utcHours=ag,t.utcDay=cg,t.utcDays=sg,t.utcWeek=fg,t.utcWeeks=yg,t.utcSunday=fg,t.utcSundays=yg,t.utcMonday=lg,t.utcMondays=gg,t.utcTuesday=hg,t.utcTuesdays=mg,t.utcWednesday=pg,t.utcWednesdays=xg,t.utcThursday=dg,t.utcThursdays=bg,t.utcFriday=vg,t.utcFridays=wg,t.utcSaturday=_g,t.utcSaturdays=Mg,t.utcMonth=Tg,t.utcMonths=kg,t.utcYear=Sg,t.utcYears=Ag,t.formatLocale=ai,t.formatDefaultLocale=ci,t.formatSpecifier=ii,t.precisionFixed=si,t.precisionPrefix=fi,t.precisionRound=li,t.isoFormat=Fg,t.isoParse=Ig,t.timeFormatLocale=vi,t.timeFormatDefaultLocale=so,t.scaleBand=po,t.scalePoint=_o,t.scaleIdentity=Eo,t.scaleLinear=Ao,t.scaleLog=Do,t.scaleOrdinal=ho,t.scaleImplicit=Hg,t.scalePow=Fo,t.scaleSqrt=Io,t.scaleQuantile=Yo,t.scaleQuantize=Bo,t.scaleThreshold=jo,t.scaleTime=Wo,t.scaleUtc=$o,t.schemeCategory10=Kg,t.schemeCategory20b=tm,t.schemeCategory20c=nm,t.schemeCategory20=em,t.scaleSequential=Qo,t.interpolateCubehelixDefault=rm,t.interpolateRainbow=Go,t.interpolateWarm=im,t.interpolateCool=om,t.interpolateViridis=am,t.interpolateMagma=cm,t.interpolateInferno=sm,t.interpolatePlasma=fm,t.creator=eu,t.customEvent=lu,t.local=ru,t.matcher=ym,t.mouse=du,t.namespace=Ko,t.namespaces=hm,t.select=Ra,t.selectAll=Ua,t.selection=La,t.selector=_u,t.selectorAll=mu,t.touch=Da,t.touches=Oa,t.window=Wu,t.active=Yc,t.interrupt=Ha,t.transition=Dc,t.axisTop=$c,t.axisRight=Zc,t.axisBottom=Gc,t.axisLeft=Jc,t.cluster=os,t.hierarchy=ys,t.pack=Bs,t.packSiblings=Us,t.packEnclose=ks,t.partition=$s,t.stratify=Js,t.tree=af,t.treemap=ff,t.treemapBinary=lf,t.treemapDice=Ws,t.treemapSlice=cf,t.treemapSliceDice=hf,t.treemapSquarify=Xm,t.treemapResquarify=Vm,t.forceCenter=pf,t.forceCollide=gf,t.forceLink=xf,t.forceManyBody=Tf,t.forceSimulation=Mf,t.forceX=kf,t.forceY=Sf,t.drag=Uf,t.dragDisable=Ef,t.dragEnable=Cf,t.voronoi=_l,t.zoom=Sl,t.zoomIdentity=ix,t.zoomTransform=xl,t.brush=Fl,t.brushX=Dl,t.brushY=Ol,t.brushSelection=Ul,t.chord=Bl,t.ribbon=Zl,t.geoAlbers=rd,t.geoAlbersUsa=od,t.geoArea=lh,t.geoAzimuthalEqualArea=cd,t.geoAzimuthalEqualAreaRaw=_w,t.geoAzimuthalEquidistant=sd,t.geoAzimuthalEquidistantRaw=yw,t.geoBounds=Eh,t.geoCentroid=Ih,t.geoCircle=Jh,t.geoClipExtent=op,t.geoConicConformal=vd,t.geoConicConformalRaw=dd,t.geoConicEqualArea=ed,t.geoConicEqualAreaRaw=nd,t.geoConicEquidistant=md,t.geoConicEquidistantRaw=gd,t.geoDistance=lp,t.geoEquirectangular=yd,t.geoEquirectangularRaw=_d,t.geoGnomonic=bd,t.geoGnomonicRaw=xd,t.geoGraticule=dp,t.geoInterpolate=vp,t.geoLength=fp,t.geoMercator=ld,t.geoMercatorRaw=fd,t.geoOrthographic=Md,t.geoOrthographicRaw=wd,t.geoPath=Lp,t.geoProjection=Qp,t.geoProjectionMutator=Kp,t.geoRotation=$h,t.geoStereographic=kd,t.geoStereographicRaw=Td,t.geoStream=uh,t.geoTransform=jp,t.geoTransverseMercator=Nd,t.geoTransverseMercatorRaw=Sd,Object.defineProperty(t,"__esModule",{value:!0})});

index.html

<!DOCTYPE html>
<meta charset='utf-8'>
<title>force</title>
<style>

.line {
  fill: none;
  stroke: blue;
  stroke-width: 1.5px;
}

.active {
  stroke: black;
  stroke-width: 2px;
}

</style>
<svg width="960" height="500"></svg>
<script type="text/javascript" src="d3.min.js"></script>
<body>
<script>

var svg = d3.select("svg"),
    w = svg.attr('width'),
    h = svg.attr('height');

var data = {
      nodes: [
          { name: "A" },
          { name: "B" },
          { name: "C" },
          { name: "D" },
          { name: "E" },
          { name: "F" },
          { name: "G" },
          { name: "H" },
          { name: "I" },
          { name: "J" }
      ],
      links: [
          { source: 0, target: 1 },
          { source: 0, target: 2 },
          { source: 0, target: 3 },
          { source: 0, target: 4 },
          { source: 1, target: 5 },
          { source: 2, target: 5 },
          { source: 3, target: 4 },
          { source: 4, target: 8 },
          { source: 5, target: 9 },
          { source: 7, target: 8 },
          { source: 8, target: 9 }
      ]
};

var simulation = d3.forceSimulation(data.nodes)
    .velocityDecay(0.2)
    .force("x", d3.forceX( w / 2 ).strength(0.1))
    .force("y", d3.forceY( h / 2 ).strength(0.1))
    .force("center", d3.forceCenter( w / 2, h / 2))
    .force('link', d3.forceLink().distance(50).links(data.links))
    .force("collide", d3.forceCollide())
    .force("charge", d3.forceManyBody().strength(-200))
    .on("tick", ticked);

var links = svg.selectAll("line")
    .data(data.links)
  .enter()
    .append("line")
    .style("stroke", "#ccc")
    .style("stroke-width", 1);

var colors = d3.scaleOrdinal(d3.schemeCategory10)
    .domain([0,9]);

var nodes = svg.selectAll("circle")
    .data(data.nodes)
  .enter()
    .append("circle")
    .attr("r", 10)
    .style("fill", function(d, i) { return colors(i); })
    .call(d3.drag()
        .on("start", dragstarted)
        .on("drag", dragged)
        .on("end", dragended));

function ticked() {
  links.attr("x1", function(d) { return d.source.x; })
       .attr("y1", function(d) { return d.source.y; })
       .attr("x2", function(d) { return d.target.x; })
       .attr("y2", function(d) { return d.target.y; });

  nodes.attr("cx", function(d) { return d.x; })
       .attr("cy", function(d) { return d.y; });
};

function dragstarted(d) {
  simulation.stop()
  d3.select(this)
      .classed('active', true)
      .attr("cx", function(d) { return d.x = d3.event.x; })
      .attr("cy", function(d) { return d.y = d3.event.y; });

  ticked();
}

function dragged() {
  d3.select(this)
      .attr("cx", function(d) { return d.x = d3.event.x; })
      .attr("cy", function(d) { return d.y = d3.event.y; });

  ticked();
}

function dragended() {
  d3.select(this).classed('active', false);

  simulation.alpha(1).restart();
}

</script>
</body>
</html>