@arcgis/core
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ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API
1 lines • 34.4 kB
JavaScript
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t=this._rootBoundsForRootAsSubNode(V);this._placingRootViolatesMaxDepth(t)?this._rebuildTree(V,t):this._growRootAsSubNode(t),g.release(t)}}_rebuildTree(t,e){F.center=e.bounds.center,F.radius=e.halfSize,A([t,F],t=>t,L);const n=g.acquire().init(this._root);this._root.initFrom(null,L,L.radius),this._root.increaseHalfSize(1.25),b(n,t=>(this.add(t.node.terminals.data),null!==t.node.residents&&this.add(t.node.residents.data),!0)),g.release(n)}_placingRootViolatesMaxDepth(t){const e=Math.log(t.halfSize/this._root.halfSize)*Math.LOG2E;let n=0;return b(this._root,t=>(n=Math.max(n,t.depth),n+e<=this._maximumDepth)),n+e>this._maximumDepth}_rootBoundsForRootAsSubNode(t){const e=t.radius,n=t.center;let r=-1/0;const i=this._root.bounds.center,o=this._root.halfSize;for(let t=0;t<3;t++){const s=i[t]-o-(n[t]-e),c=n[t]+e-(i[t]+o),a=Math.max(0,Math.ceil(s/(2*o))),u=Math.max(0,Math.ceil(c/(2*o)))+1,h=2**Math.ceil(Math.log(a+u)*Math.LOG2E);r=Math.max(r,h),k[t].min=a,k[t].max=u}for(let t=0;t<3;t++){let e=k[t].min,n=k[t].max;const s=(r-(e+n))/2;e+=Math.ceil(s),n+=Math.floor(s);const c=i[t]-o-e*o*2;R.center[t]=c+(n+e)*o}const s=r*o;return R.radius=s*z,g.acquire().initFrom(null,R,s,0)}_growRootAsSubNode(t){const e=this._root.node;V.center=this._root.bounds.center,V.radius=this._root.halfSize,this._root.init(t),t.advanceTo(V,null,!0),t.node.children=e.children,t.node.residents=e.residents,t.node.terminals=e.terminals}_shrink(){for(;;){const t=this._findShrinkIndex();if(-1===t)break;this._root.advance(t),this._root.depth=0}}_findShrinkIndex(){if(0!==this._root.node.terminals.length||this._root.isLeaf())return-1;let t=null;const e=this._root.node.children;let n=0,r=0;for(;r<e.length&&null==t;)n=r++,t=e[n];for(;r<e.length;)if(e[r++])return-1;return n}_isDegenerate(t){return!T(this.objectToBoundingSphere(t).radius)}_fitsInsideTree(t){const e=this._root.bounds,n=this._root.halfSize;return t.radius<=n&&t.center[0]>=e.center[0]-n&&t.center[0]<=e.center[0]+n&&t.center[1]>=e.center[1]-n&&t.center[1]<=e.center[1]+n&&t.center[2]>=e.center[2]-n&&t.center[2]<=e.center[2]+n}toJSON(){const{maximumDepth:t,maximumObjectsPerNode:e,_objectCount:n}=this,r=this._nodeToJSON(this._root.node);return{maximumDepth:t,maximumObjectsPerNode:e,objectCount:n,root:{bounds:this._root.bounds,halfSize:this._root.halfSize,depth:this._root.depth,node:r}}}_nodeToJSON(t){const e=t.children.map(t=>t?this._nodeToJSON(t):null),n=t.residents?.map(t=>this.objectToBoundingSphere(t)),r=t.terminals?.map(t=>this.objectToBoundingSphere(t));return{children:e,residents:n,terminals:r}}static fromJSON(t){const e=new p(t=>t,{maximumDepth:t.maximumDepth,maximumObjectsPerNode:t.maximumObjectsPerNode});return e._objectCount=t.objectCount,e._root.initFrom(t.root.node,t.root.bounds,t.root.halfSize,t.root.depth),e}}class g{constructor(){this.bounds=new h.iy,this.halfSize=0,this.initFrom(null,null,0,0)}init(t){return 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