d3.v7.min.js

// https://d3js.org v7.2.1 Copyright 2010-2021 Mike Bostock
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c=a-a%3,f=u+(t+1)%3,s=c+(a+2)%3,l=n[o],h=n[t],d=n[f],p=n[s];if(tu(r[2*l],r[2*l+1],r[2*h],r[2*h+1],r[2*d],r[2*d+1],r[2*p],r[2*p+1])){n[t]=p,n[a]=l;const r=e[s];if(-1===r){let n=this._hullStart;do{if(this._hullTri[n]===s){this._hullTri[n]=t;break}n=this._hullPrev[n]}while(n!==this._hullStart)}this._link(t,r),this._link(a,e[o]),this._link(o,s);const u=c+(a+1)%3;i<Ka.length&&(Ka[i++]=u)}else{if(0===i)break;t=Ka[--i]}}return o}_link(t,n){this._halfedges[t]=n,-1!==n&&(this._halfedges[n]=t)}_addTriangle(t,n,e,r,i,o){const a=this.trianglesLen;return this._triangles[a]=t,this._triangles[a+1]=n,this._triangles[a+2]=e,this._link(a,r),this._link(a+1,i),this._link(a+2,o),this.trianglesLen+=3,a}}function Ja(t,n,e,r){const i=t-e,o=n-r;return i*i+o*o}function tu(t,n,e,r,i,o,a,u){const c=t-a,f=n-u,s=e-a,l=r-u,h=i-a,d=o-u,p=s*s+l*l,g=h*h+d*d;return c*(l*g-p*d)-f*(s*g-p*h)+(c*c+f*f)*(s*d-l*h)<0}function nu(t,n,e,r,i,o){const a=e-t,u=r-n,c=i-t,f=o-n,s=a*a+u*u,l=c*c+f*f,h=.5/(a*f-u*c),d=(f*s-u*l)*h,p=(a*l-c*s)*h;return d*d+p*p}function eu(t,n,e,r){if(r-e<=20)for(let i=e+1;i<=r;i++){const r=t[i],o=n[r];let a=i-1;for(;a>=e&&n[t[a]]>o;)t[a+1]=t[a--];t[a+1]=r}else{let i=e+1,o=r;ru(t,e+r>>1,i),n[t[e]]>n[t[r]]&&ru(t,e,r),n[t[i]]>n[t[r]]&&ru(t,i,r),n[t[e]]>n[t[i]]&&ru(t,e,i);const a=t[i],u=n[a];for(;;){do{i++}while(n[t[i]]<u);do{o--}while(n[t[o]]>u);if(o<i)break;ru(t,i,o)}t[e+1]=t[o],t[o]=a,r-i+1>=o-e?(eu(t,n,i,r),eu(t,n,e,o-1)):(eu(t,n,e,o-1),eu(t,n,i,r))}}function ru(t,n,e){const r=t[n];t[n]=t[e],t[e]=r}function iu(t){return t[0]}function ou(t){return t[1]}const au=1e-6;class uu{constructor(){this._x0=this._y0=this._x1=this._y1=null,this._=""}moveTo(t,n){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+n}`}closePath(){null!==this._x1&&(this._x1=this._x0,this._y1=this._y0,this._+="Z")}lineTo(t,n){this._+=`L${this._x1=+t},${this._y1=+n}`}arc(t,n,e){const r=(t=+t)+(e=+e),i=n=+n;if(e<0)throw new Error("negative radius");null===this._x1?this._+=`M${r},${i}`:(Math.abs(this._x1-r)>au||Math.abs(this._y1-i)>au)&&(this._+="L"+r+","+i),e&&(this._+=`A${e},${e},0,1,1,${t-e},${n}A${e},${e},0,1,1,${this._x1=r},${this._y1=i}`)}rect(t,n,e,r){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+n}h${+e}v${+r}h${-e}Z`}value(){return this._||null}}class cu{constructor(){this._=[]}moveTo(t,n){this._.push([t,n])}closePath(){this._.push(this._[0].slice())}lineTo(t,n){this._.push([t,n])}value(){return this._.length?this._:null}}class fu{constructor(t,[n,e,r,i]=[0,0,960,500]){if(!((r=+r)>=(n=+n)&&(i=+i)>=(e=+e)))throw new Error("invalid bounds");this.delaunay=t,this._circumcenters=new Float64Array(2*t.points.length),this.vectors=new Float64Array(2*t.points.length),this.xmax=r,this.xmin=n,this.ymax=i,this.ymin=e,this._init()}update(){return this.delaunay.update(),this._init(),this}_init(){const{delaunay:{points:t,hull:n,triangles:e},vectors:r}=this,i=this.circumcenters=this._circumcenters.subarray(0,e.length/3*2);for(let n,r,o=0,a=0,u=e.length;o<u;o+=3,a+=2){const u=2*e[o],c=2*e[o+1],f=2*e[o+2],s=t[u],l=t[u+1],h=t[c],d=t[c+1],p=t[f],g=t[f+1],y=h-s,v=d-l,_=p-s,b=g-l,m=2*(y*b-v*_);if(Math.abs(m)<1e-9){let i=1e9;const o=2*e[0];i*=Math.sign((t[o]-s)*b-(t[o+1]-l)*_),n=(s+p)/2-i*b,r=(l+g)/2+i*_}else{const t=1/m,e=y*y+v*v,i=_*_+b*b;n=s+(b*e-v*i)*t,r=l+(y*i-_*e)*t}i[a]=n,i[a+1]=r}let o,a,u,c=n[n.length-1],f=4*c,s=t[2*c],l=t[2*c+1];r.fill(0);for(let e=0;e<n.length;++e)c=n[e],o=f,a=s,u=l,f=4*c,s=t[2*c],l=t[2*c+1],r[o+2]=r[f]=u-l,r[o+3]=r[f+1]=s-a}render(t){const n=null==t?t=new uu:void 0,{delaunay:{halfedges:e,inedges:r,hull:i},circumcenters:o,vectors:a}=this;if(i.length<=1)return null;for(let n=0,r=e.length;n<r;++n){const r=e[n];if(r<n)continue;const i=2*Math.floor(n/3),a=2*Math.floor(r/3),u=o[i],c=o[i+1],f=o[a],s=o[a+1];this._renderSegment(u,c,f,s,t)}let u,c=i[i.length-1];for(let n=0;n<i.length;++n){u=c,c=i[n];const e=2*Math.floor(r[c]/3),f=o[e],s=o[e+1],l=4*u,h=this._project(f,s,a[l+2],a[l+3]);h&&this._renderSegment(f,s,h[0],h[1],t)}return n&&n.value()}renderBounds(t){const n=null==t?t=new uu:void 0;return t.rect(this.xmin,this.ymin,this.xmax-this.xmin,this.ymax-this.ymin),n&&n.value()}renderCell(t,n){const e=null==n?n=new uu:void 0,r=this._clip(t);if(null===r||!r.length)return;n.moveTo(r[0],r[1]);let i=r.length;for(;r[0]===r[i-2]&&r[1]===r[i-1]&&i>1;)i-=2;for(let t=2;t<i;t+=2)r[t]===r[t-2]&&r[t+1]===r[t-1]||n.lineTo(r[t],r[t+1]);return n.closePath(),e&&e.value()}*cellPolygons(){const{delaunay:{points:t}}=this;for(let n=0,e=t.length/2;n<e;++n){const t=this.cellPolygon(n);t&&(t.index=n,yield t)}}cellPolygon(t){const n=new cu;return this.renderCell(t,n),n.value()}_renderSegment(t,n,e,r,i){let o;const a=this._regioncode(t,n),u=this._regioncode(e,r);0===a&&0===u?(i.moveTo(t,n),i.lineTo(e,r)):(o=this._clipSegment(t,n,e,r,a,u))&&(i.moveTo(o[0],o[1]),i.lineTo(o[2],o[3]))}contains(t,n,e){return(n=+n)==n&&(e=+e)==e&&this.delaunay._step(t,n,e)===t}*neighbors(t){const n=this._clip(t);if(n)for(const e of this.delaunay.neighbors(t)){const t=this._clip(e);if(t)t:for(let r=0,i=n.length;r<i;r+=2)for(let o=0,a=t.length;o<a;o+=2)if(n[r]==t[o]&&n[r+1]==t[o+1]&&n[(r+2)%i]==t[(o+a-2)%a]&&n[(r+3)%i]==t[(o+a-1)%a]){yield e;break t}}}_cell(t){const{circumcenters:n,delaunay:{inedges:e,halfedges:r,triangles:i}}=this,o=e[t];if(-1===o)return null;const a=[];let u=o;do{const e=Math.floor(u/3);if(a.push(n[2*e],n[2*e+1]),u=u%3==2?u-2:u+1,i[u]!==t)break;u=r[u]}while(u!==o&&-1!==u);return a}_clip(t){if(0===t&&1===this.delaunay.hull.length)return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];const n=this._cell(t);if(null===n)return null;const{vectors:e}=this,r=4*t;return e[r]||e[r+1]?this._clipInfinite(t,n,e[r],e[r+1],e[r+2],e[r+3]):this._clipFinite(t,n)}_clipFinite(t,n){const e=n.length;let r,i,o,a,u=null,c=n[e-2],f=n[e-1],s=this._regioncode(c,f),l=0;for(let h=0;h<e;h+=2)if(r=c,i=f,c=n[h],f=n[h+1],o=s,s=this._regioncode(c,f),0===o&&0===s)a=l,l=0,u?u.push(c,f):u=[c,f];else{let n,e,h,d,p;if(0===o){if(null===(n=this._clipSegment(r,i,c,f,o,s)))continue;[e,h,d,p]=n}else{if(null===(n=this._clipSegment(c,f,r,i,s,o)))continue;[d,p,e,h]=n,a=l,l=this._edgecode(e,h),a&&l&&this._edge(t,a,l,u,u.length),u?u.push(e,h):u=[e,h]}a=l,l=this._edgecode(d,p),a&&l&&this._edge(t,a,l,u,u.length),u?u.push(d,p):u=[d,p]}if(u)a=l,l=this._edgecode(u[0],u[1]),a&&l&&this._edge(t,a,l,u,u.length);else if(this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2))return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];return u}_clipSegment(t,n,e,r,i,o){for(;;){if(0===i&&0===o)return[t,n,e,r];if(i&o)return null;let a,u,c=i||o;8&c?(a=t+(e-t)*(this.ymax-n)/(r-n),u=this.ymax):4&c?(a=t+(e-t)*(this.ymin-n)/(r-n),u=this.ymin):2&c?(u=n+(r-n)*(this.xmax-t)/(e-t),a=this.xmax):(u=n+(r-n)*(this.xmin-t)/(e-t),a=this.xmin),i?(t=a,n=u,i=this._regioncode(t,n)):(e=a,r=u,o=this._regioncode(e,r))}}_clipInfinite(t,n,e,r,i,o){let a,u=Array.from(n);if((a=this._project(u[0],u[1],e,r))&&u.unshift(a[0],a[1]),(a=this._project(u[u.length-2],u[u.length-1],i,o))&&u.push(a[0],a[1]),u=this._clipFinite(t,u))for(let n,e=0,r=u.length,i=this._edgecode(u[r-2],u[r-1]);e<r;e+=2)n=i,i=this._edgecode(u[e],u[e+1]),n&&i&&(e=this._edge(t,n,i,u,e),r=u.length);else this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2)&&(u=[this.xmin,this.ymin,this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax]);return u}_edge(t,n,e,r,i){for(;n!==e;){let e,o;switch(n){case 5:n=4;continue;case 4:n=6,e=this.xmax,o=this.ymin;break;case 6:n=2;continue;case 2:n=10,e=this.xmax,o=this.ymax;break;case 10:n=8;continue;case 8:n=9,e=this.xmin,o=this.ymax;break;case 9:n=1;continue;case 1:n=5,e=this.xmin,o=this.ymin}r[i]===e&&r[i+1]===o||!this.contains(t,e,o)||(r.splice(i,0,e,o),i+=2)}if(r.length>4)for(let t=0;t<r.length;t+=2){const n=(t+2)%r.length,e=(t+4)%r.length;(r[t]===r[n]&&r[n]===r[e]||r[t+1]===r[n+1]&&r[n+1]===r[e+1])&&(r.splice(n,2),t-=2)}return i}_project(t,n,e,r){let i,o,a,u=1/0;if(r<0){if(n<=this.ymin)return null;(i=(this.ymin-n)/r)<u&&(a=this.ymin,o=t+(u=i)*e)}else if(r>0){if(n>=this.ymax)return null;(i=(this.ymax-n)/r)<u&&(a=this.ymax,o=t+(u=i)*e)}if(e>0){if(t>=this.xmax)return null;(i=(this.xmax-t)/e)<u&&(o=this.xmax,a=n+(u=i)*r)}else if(e<0){if(t<=this.xmin)return null;(i=(this.xmin-t)/e)<u&&(o=this.xmin,a=n+(u=i)*r)}return[o,a]}_edgecode(t,n){return(t===this.xmin?1:t===this.xmax?2:0)|(n===this.ymin?4:n===this.ymax?8:0)}_regioncode(t,n){return(t<this.xmin?1:t>this.xmax?2:0)|(n<this.ymin?4:n>this.ymax?8:0)}}const su=2*Math.PI,lu=Math.pow;function hu(t){return t[0]}function du(t){return t[1]}function pu(t,n,e){return[t+Math.sin(t+n)*e,n+Math.cos(t-n)*e]}class gu{static from(t,n=hu,e=du,r){return new gu("length"in t?function(t,n,e,r){const i=t.length,o=new Float64Array(2*i);for(let a=0;a<i;++a){const i=t[a];o[2*a]=n.call(r,i,a,t),o[2*a+1]=e.call(r,i,a,t)}return o}(t,n,e,r):Float64Array.from(function*(t,n,e,r){let i=0;for(const o of t)yield n.call(r,o,i,t),yield e.call(r,o,i,t),++i}(t,n,e,r)))}constructor(t){this._delaunator=new Qa(t),this.inedges=new Int32Array(t.length/2),this._hullIndex=new Int32Array(t.length/2),this.points=this._delaunator.coords,this._init()}update(){return this._delaunator.update(),this._init(),this}_init(){const t=this._delaunator,n=this.points;if(t.hull&&t.hull.length>2&&function(t){const{triangles:n,coords:e}=t;for(let t=0;t<n.length;t+=3){const r=2*n[t],i=2*n[t+1],o=2*n[t+2];if((e[o]-e[r])*(e[i+1]-e[r+1])-(e[i]-e[r])*(e[o+1]-e[r+1])>1e-10)return!1}return!0}(t)){this.collinear=Int32Array.from({length:n.length/2},((t,n)=>n)).sort(((t,e)=>n[2*t]-n[2*e]||n[2*t+1]-n[2*e+1]));const t=this.collinear[0],e=this.collinear[this.collinear.length-1],r=[n[2*t],n[2*t+1],n[2*e],n[2*e+1]],i=1e-8*Math.hypot(r[3]-r[1],r[2]-r[0]);for(let t=0,e=n.length/2;t<e;++t){const e=pu(n[2*t],n[2*t+1],i);n[2*t]=e[0],n[2*t+1]=e[1]}this._delaunator=new Qa(n)}else delete this.collinear;const e=this.halfedges=this._delaunator.halfedges,r=this.hull=this._delaunator.hull,i=this.triangles=this._delaunator.triangles,o=this.inedges.fill(-1),a=this._hullIndex.fill(-1);for(let t=0,n=e.length;t<n;++t){const n=i[t%3==2?t-2:t+1];-1!==e[t]&&-1!==o[n]||(o[n]=t)}for(let t=0,n=r.length;t<n;++t)a[r[t]]=t;r.length<=2&&r.length>0&&(this.triangles=new Int32Array(3).fill(-1),this.halfedges=new 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3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:tx(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var ix=function t(n){function e(t){return new rx(t,n)}return e.tension=function(n){return t(+n)},e}(0);function ox(t,n){this._context=t,this._k=(1-n)/6}ox.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 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3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:ux(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var lx=function t(n){function e(t){return n?new sx(t,n):new rx(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);function 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