text: // https://github.com/vasturiano/d3-octree v0.2.0 Copyright 2021 Vasco Asturiano
  !function(t,i){"object"==typeof exports&&"undefined"!=typeof module?i(exports):"function"==typeof define&&define.amd?define(["exports"],i):i((t="undefined"!=typeof globalThis?globalThis:t||self).d3=t.d3||{})}(this,(function(t){"use strict";function i(t,i,n,e,s){if(isNaN(i)||isNaN(n)||isNaN(e))return t;var h,r,o,a,l,u,_,f,c,y,x,d,p=t._root,w={data:s},z=t._x0,N=t._y0,v=t._z0,g=t._x1,b=t._y1,A=t._z1;if(!p)return t._root=w,t;for(;p.length;)if((f=i>=(r=(z+g)/2))?z=r:g=r,(c=n>=(o=(N+b)/2))?N=o:b=o,(y=e>=(a=(v+A)/2))?v=a:A=a,h=p,!(p=p[x=y<<2|c<<1|f]))return h[x]=w,t;if(l=+t._x.call(null,p.data),u=+t._y.call(null,p.data),_=+t._z.call(null,p.data),i===l&&n===u&&e===_)return w.next=p,h?h[x]=w:t._root=w,t;do{h=h?h[x]=new Array(8):t._root=new Array(8),(f=i>=(r=(z+g)/2))?z=r:g=r,(c=n>=(o=(N+b)/2))?N=o:b=o,(y=e>=(a=(v+A)/2))?v=a:A=a}while((x=y<<2|c<<1|f)==(d=(_>=a)<<2|(u>=o)<<1|l>=r));return h[d]=p,h[x]=w,t}function n(t,i,n,e,s,h,r){this.node=t,this.x0=i,this.y0=n,this.z0=e,this.x1=s,this.y1=h,this.z1=r}function e(t){return t[0]}function s(t){return t[1]}function h(t){return t[2]}function r(t,i,n,r){var a=new o(null==i?e:i,null==n?s:n,null==r?h:r,NaN,NaN,NaN,NaN,NaN,NaN);return null==t?a:a.addAll(t)}function o(t,i,n,e,s,h,r,o,a){this._x=t,this._y=i,this._z=n,this._x0=e,this._y0=s,this._z0=h,this._x1=r,this._y1=o,this._z1=a,this._root=void 0}function a(t){for(var i={data:t.data},n=i;t=t.next;)n=n.next={data:t.data};return i}var l=r.prototype=o.prototype;l.copy=function(){var t,i,n=new o(this._x,this._y,this._z,this._x0,this._y0,this._z0,this._x1,this._y1,this._z1),e=this._root;if(!e)return n;if(!e.length)return n._root=a(e),n;for(t=[{source:e,target:n._root=new Array(8)}];e=t.pop();)for(var s=0;s<8;++s)(i=e.source[s])&&(i.length?t.push({source:i,target:e.target[s]=new Array(8)}):e.target[s]=a(i));return n},l.add=function(t){var n=+this._x.call(null,t),e=+this._y.call(null,t),s=+this._z.call(null,t);return i(this.cover(n,e,s),n,e,s,t)},l.addAll=function(t){var n,e,s,h,r,o=t.length,a=new Array(o),l=new Array(o),u=new Array(o),_=1/0,f=1/0,c=1/0,y=-1/0,x=-1/0,d=-1/0;for(e=0;e<o;++e)isNaN(s=+this._x.call(null,n=t[e]))||isNaN(h=+this._y.call(null,n))||isNaN(r=+this._z.call(null,n))||(a[e]=s,l[e]=h,u[e]=r,s<_&&(_=s),s>y&&(y=s),h<f&&(f=h),h>x&&(x=h),r<c&&(c=r),r>d&&(d=r));if(_>y||f>x||c>d)return this;for(this.cover(_,f,c).cover(y,x,d),e=0;e<o;++e)i(this,a[e],l[e],u[e],t[e]);return this},l.cover=function(t,i,n){if(isNaN(t=+t)||isNaN(i=+i)||isNaN(n=+n))return this;var e=this._x0,s=this._y0,h=this._z0,r=this._x1,o=this._y1,a=this._z1;if(isNaN(e))r=(e=Math.floor(t))+1,o=(s=Math.floor(i))+1,a=(h=Math.floor(n))+1;else{for(var l,u,_=r-e||1,f=this._root;e>t||t>=r||s>i||i>=o||h>n||n>=a;)switch(u=(n<h)<<2|(i<s)<<1|t<e,(l=new Array(8))[u]=f,f=l,_*=2,u){case 0:r=e+_,o=s+_,a=h+_;break;case 1:e=r-_,o=s+_,a=h+_;break;case 2:r=e+_,s=o-_,a=h+_;break;case 3:e=r-_,s=o-_,a=h+_;break;case 4:r=e+_,o=s+_,h=a-_;break;case 5:e=r-_,o=s+_,h=a-_;break;case 6:r=e+_,s=o-_,h=a-_;break;case 7:e=r-_,s=o-_,h=a-_}this._root&&this._root.length&&(this._root=f)}return this._x0=e,this._y0=s,this._z0=h,this._x1=r,this._y1=o,this._z1=a,this},l.data=function(){var t=[];return this.visit((function(i){if(!i.length)do{t.push(i.data)}while(i=i.next)})),t},l.extent=function(t){return arguments.length?this.cover(+t[0][0],+t[0][1],+t[0][2]).cover(+t[1][0],+t[1][1],+t[1][2]):isNaN(this._x0)?void 0:[[this._x0,this._y0,this._z0],[this._x1,this._y1,this._z1]]},l.find=function(t,i,e,s){var h,r,o,a,l,u,_,f,c,y=this._x0,x=this._y0,d=this._z0,p=this._x1,w=this._y1,z=this._z1,N=[],v=this._root;for(v&&N.push(new n(v,y,x,d,p,w,z)),null==s?s=1/0:(y=t-s,x=i-s,d=e-s,p=t+s,w=i+s,z=e+s,s*=s);f=N.pop();)if(!(!(v=f.node)||(r=f.x0)>p||(o=f.y0)>w||(a=f.z0)>z||(l=f.x1)<y||(u=f.y1)<x||(_=f.z1)<d))if(v.length){var g=(r+l)/2,b=(o+u)/2,A=(a+_)/2;N.push(new n(v[7],g,b,A,l,u,_),new n(v[6],r,b,A,g,u,_),new n(v[5],g,o,A,l,b,_),new n(v[4],r,o,A,g,b,_),new n(v[3],g,b,a,l,u,A),new n(v[2],r,b,a,g,u,A),new n(v[1],g,o,a,l,b,A),new n(v[0],r,o,a,g,b,A)),(c=(e>=A)<<2|(i>=b)<<1|t>=g)&&(f=N[N.length-1],N[N.length-1]=N[N.length-1-c],N[N.length-1-c]=f)}else{var k=t-+this._x.call(null,v.data),m=i-+this._y.call(null,v.data),M=e-+this._z.call(null,v.data),j=k*k+m*m+M*M;if(j<s){var T=Math.sqrt(s=j);y=t-T,x=i-T,d=e-T,p=t+T,w=i+T,z=e+T,h=v.data}}return h},l.remove=function(t){if(isNaN(h=+this._x.call(null,t))||isNaN(r=+this._y.call(null,t))||isNaN(o=+this._z.call(null,t)))return this;var i,n,e,s,h,r,o,a,l,u,_,f,c,y,x,d=this._root,p=this._x0,w=this._y0,z=this._z0,N=this._x1,v=this._y1,g=this._z1;if(!d)return this;if(d.length)for(;;){if((_=h>=(a=(p+N)/2))?p=a:N=a,(f=r>=(l=(w+v)/2))?w=l:v=l,(c=o>=(u=(z+g)/2))?z=u:g=u,i=d,!(d=d[y=c<<2|f<<1|_]))return this;if(!d.length)break;(i[y+1&7]||i[y+2&7]||i[y+3&7]||i[y+4&7]||i[y+5&7]||i[y+6&7]||i[y+7&7])&&(n=i,x=y)}for(;d.data!==t;)if(e=d,!(d=d.next))return this;return(s=d.next)&&delete d.next,e?(s?e.next=s:delete e.next,this):i?(s?i[y]=s:delete i[y],(d=i[0]||i[1]||i[2]||i[3]||i[4]||i[5]||i[6]||i[7])&&d===(i[7]||i[6]||i[5]||i[4]||i[3]||i[2]||i[1]||i[0])&&!d.length&&(n?n[x]=d:this._root=d),this):(this._root=s,this)},l.removeAll=function(t){for(var i=0,n=t.length;i<n;++i)this.remove(t[i]);return this},l.root=function(){return this._root},l.size=function(){var t=0;return this.visit((function(i){if(!i.length)do{++t}while(i=i.next)})),t},l.visit=function(t){var i,e,s,h,r,o,a,l,u=[],_=this._root;for(_&&u.push(new n(_,this._x0,this._y0,this._z0,this._x1,this._y1,this._z1));i=u.pop();)if(!t(_=i.node,s=i.x0,h=i.y0,r=i.z0,o=i.x1,a=i.y1,l=i.z1)&&_.length){var f=(s+o)/2,c=(h+a)/2,y=(r+l)/2;(e=_[7])&&u.push(new n(e,f,c,y,o,a,l)),(e=_[6])&&u.push(new n(e,s,c,y,f,a,l)),(e=_[5])&&u.push(new n(e,f,h,y,o,c,l)),(e=_[4])&&u.push(new n(e,s,h,y,f,c,l)),(e=_[3])&&u.push(new n(e,f,c,r,o,a,y)),(e=_[2])&&u.push(new n(e,s,c,r,f,a,y)),(e=_[1])&&u.push(new n(e,f,h,r,o,c,y)),(e=_[0])&&u.push(new n(e,s,h,r,f,c,y))}return this},l.visitAfter=function(t){var i,e=[],s=[];for(this._root&&e.push(new n(this._root,this._x0,this._y0,this._z0,this._x1,this._y1,this._z1));i=e.pop();){var h=i.node;if(h.length){var r,o=i.x0,a=i.y0,l=i.z0,u=i.x1,_=i.y1,f=i.z1,c=(o+u)/2,y=(a+_)/2,x=(l+f)/2;(r=h[0])&&e.push(new n(r,o,a,l,c,y,x)),(r=h[1])&&e.push(new n(r,c,a,l,u,y,x)),(r=h[2])&&e.push(new n(r,o,y,l,c,_,x)),(r=h[3])&&e.push(new n(r,c,y,l,u,_,x)),(r=h[4])&&e.push(new n(r,o,a,x,c,y,f)),(r=h[5])&&e.push(new n(r,c,a,x,u,y,f)),(r=h[6])&&e.push(new n(r,o,y,x,c,_,f)),(r=h[7])&&e.push(new n(r,c,y,x,u,_,f))}s.push(i)}for(;i=s.pop();)t(i.node,i.x0,i.y0,i.z0,i.x1,i.y1,i.z1);return this},l.x=function(t){return arguments.length?(this._x=t,this):this._x},l.y=function(t){return arguments.length?(this._y=t,this):this._y},l.z=function(t){return arguments.length?(this._z=t,this):this._z},t.octree=r,Object.defineProperty(t,"__esModule",{value:!0})}));
  