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rhill-voronoi-core.min.js
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rhill-voronoi-core.min.js
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/*!
Copyright (C) 2010-2013 Raymond Hill: https://github.com/gorhill/Javascript-Voronoi
MIT License: See https://github.com/gorhill/Javascript-Voronoi/LICENSE.md
*/
;
function Voronoi(){this.vertices=null;this.edges=null;this.cells=null;this.toRecycle=null;this.beachsectionJunkyard=[];this.circleEventJunkyard=[];
this.vertexJunkyard=[];this.edgeJunkyard=[];this.cellJunkyard=[]}Voronoi.prototype.reset=function(){if(!this.beachline){this.beachline=new this.RBTree()
}if(this.beachline.root){var a=this.beachline.getFirst(this.beachline.root);while(a){this.beachsectionJunkyard.push(a);a=a.rbNext
}}this.beachline.root=null;if(!this.circleEvents){this.circleEvents=new this.RBTree()}this.circleEvents.root=this.firstCircleEvent=null;
this.vertices=[];this.edges=[];this.cells=[]};Voronoi.prototype.sqrt=Math.sqrt;Voronoi.prototype.abs=Math.abs;Voronoi.prototype.ε=Voronoi.ε=1e-9;
Voronoi.prototype.invε=Voronoi.invε=1/Voronoi.ε;Voronoi.prototype.equalWithEpsilon=function(d,c){return this.abs(d-c)<1e-9
};Voronoi.prototype.greaterThanWithEpsilon=function(d,c){return d-c>1e-9};Voronoi.prototype.greaterThanOrEqualWithEpsilon=function(d,c){return c-d<1e-9
};Voronoi.prototype.lessThanWithEpsilon=function(d,c){return c-d>1e-9};Voronoi.prototype.lessThanOrEqualWithEpsilon=function(d,c){return d-c<1e-9
};Voronoi.prototype.RBTree=function(){this.root=null};Voronoi.prototype.RBTree.prototype.rbInsertSuccessor=function(e,a){var d;
if(e){a.rbPrevious=e;a.rbNext=e.rbNext;if(e.rbNext){e.rbNext.rbPrevious=a}e.rbNext=a;if(e.rbRight){e=e.rbRight;while(e.rbLeft){e=e.rbLeft
}e.rbLeft=a}else{e.rbRight=a}d=e}else{if(this.root){e=this.getFirst(this.root);a.rbPrevious=null;a.rbNext=e;e.rbPrevious=a;
e.rbLeft=a;d=e}else{a.rbPrevious=a.rbNext=null;this.root=a;d=null}}a.rbLeft=a.rbRight=null;a.rbParent=d;a.rbRed=true;var c,b;
e=a;while(d&&d.rbRed){c=d.rbParent;if(d===c.rbLeft){b=c.rbRight;if(b&&b.rbRed){d.rbRed=b.rbRed=false;c.rbRed=true;e=c}else{if(e===d.rbRight){this.rbRotateLeft(d);
e=d;d=e.rbParent}d.rbRed=false;c.rbRed=true;this.rbRotateRight(c)}}else{b=c.rbLeft;if(b&&b.rbRed){d.rbRed=b.rbRed=false;c.rbRed=true;
e=c}else{if(e===d.rbLeft){this.rbRotateRight(d);e=d;d=e.rbParent}d.rbRed=false;c.rbRed=true;this.rbRotateLeft(c)}}d=e.rbParent
}this.root.rbRed=false};Voronoi.prototype.RBTree.prototype.rbRemoveNode=function(f){if(f.rbNext){f.rbNext.rbPrevious=f.rbPrevious
}if(f.rbPrevious){f.rbPrevious.rbNext=f.rbNext}f.rbNext=f.rbPrevious=null;var e=f.rbParent,g=f.rbLeft,b=f.rbRight,d;if(!g){d=b
}else{if(!b){d=g}else{d=this.getFirst(b)}}if(e){if(e.rbLeft===f){e.rbLeft=d}else{e.rbRight=d}}else{this.root=d}var a;if(g&&b){a=d.rbRed;
d.rbRed=f.rbRed;d.rbLeft=g;g.rbParent=d;if(d!==b){e=d.rbParent;d.rbParent=f.rbParent;f=d.rbRight;e.rbLeft=f;d.rbRight=b;b.rbParent=d
}else{d.rbParent=e;e=d;f=d.rbRight}}else{a=f.rbRed;f=d}if(f){f.rbParent=e}if(a){return}if(f&&f.rbRed){f.rbRed=false;return
}var c;do{if(f===this.root){break}if(f===e.rbLeft){c=e.rbRight;if(c.rbRed){c.rbRed=false;e.rbRed=true;this.rbRotateLeft(e);
c=e.rbRight}if((c.rbLeft&&c.rbLeft.rbRed)||(c.rbRight&&c.rbRight.rbRed)){if(!c.rbRight||!c.rbRight.rbRed){c.rbLeft.rbRed=false;
c.rbRed=true;this.rbRotateRight(c);c=e.rbRight}c.rbRed=e.rbRed;e.rbRed=c.rbRight.rbRed=false;this.rbRotateLeft(e);f=this.root;
break}}else{c=e.rbLeft;if(c.rbRed){c.rbRed=false;e.rbRed=true;this.rbRotateRight(e);c=e.rbLeft}if((c.rbLeft&&c.rbLeft.rbRed)||(c.rbRight&&c.rbRight.rbRed)){if(!c.rbLeft||!c.rbLeft.rbRed){c.rbRight.rbRed=false;
c.rbRed=true;this.rbRotateLeft(c);c=e.rbLeft}c.rbRed=e.rbRed;e.rbRed=c.rbLeft.rbRed=false;this.rbRotateRight(e);f=this.root;
break}}c.rbRed=true;f=e;e=e.rbParent}while(!f.rbRed);if(f){f.rbRed=false}};Voronoi.prototype.RBTree.prototype.rbRotateLeft=function(b){var d=b,c=b.rbRight,a=d.rbParent;
if(a){if(a.rbLeft===d){a.rbLeft=c}else{a.rbRight=c}}else{this.root=c}c.rbParent=a;d.rbParent=c;d.rbRight=c.rbLeft;if(d.rbRight){d.rbRight.rbParent=d
}c.rbLeft=d};Voronoi.prototype.RBTree.prototype.rbRotateRight=function(b){var d=b,c=b.rbLeft,a=d.rbParent;if(a){if(a.rbLeft===d){a.rbLeft=c
}else{a.rbRight=c}}else{this.root=c}c.rbParent=a;d.rbParent=c;d.rbLeft=c.rbRight;if(d.rbLeft){d.rbLeft.rbParent=d}c.rbRight=d
};Voronoi.prototype.RBTree.prototype.getFirst=function(a){while(a.rbLeft){a=a.rbLeft}return a};Voronoi.prototype.RBTree.prototype.getLast=function(a){while(a.rbRight){a=a.rbRight
}return a};Voronoi.prototype.Diagram=function(a){this.site=a};Voronoi.prototype.Cell=function(a){this.site=a;this.halfedges=[];
this.closeMe=false};Voronoi.prototype.Cell.prototype.init=function(a){this.site=a;this.halfedges=[];this.closeMe=false;return this
};Voronoi.prototype.createCell=function(b){var a=this.cellJunkyard.pop();if(a){return a.init(b)}return new this.Cell(b)};
Voronoi.prototype.Cell.prototype.prepareHalfedges=function(){var a=this.halfedges,b=a.length,c;while(b--){c=a[b].edge;if(!c.vb||!c.va){a.splice(b,1)
}}a.sort(function(e,d){return d.angle-e.angle});return a.length};Voronoi.prototype.Cell.prototype.getNeighborIds=function(){var a=[],b=this.halfedges.length,c;
while(b--){c=this.halfedges[b].edge;if(c.lSite!==null&&c.lSite.voronoiId!=this.site.voronoiId){a.push(c.lSite.voronoiId)}else{if(c.rSite!==null&&c.rSite.voronoiId!=this.site.voronoiId){a.push(c.rSite.voronoiId)
}}}return a};Voronoi.prototype.Cell.prototype.getBbox=function(){var i=this.halfedges,d=i.length,a=Infinity,g=Infinity,c=-Infinity,b=-Infinity,h,f,e;
while(d--){h=i[d].getStartpoint();f=h.x;e=h.y;if(f<a){a=f}if(e<g){g=e}if(f>c){c=f}if(e>b){b=e}}return{x:a,y:g,width:c-a,height:b-g}
};Voronoi.prototype.Cell.prototype.pointIntersection=function(a,h){var b=this.halfedges,c=b.length,f,g,e,d;while(c--){f=b[c];
g=f.getStartpoint();e=f.getEndpoint();d=(h-g.y)*(e.x-g.x)-(a-g.x)*(e.y-g.y);if(!d){return 0}if(d>0){return -1}}return 1};
Voronoi.prototype.Vertex=function(a,b){this.x=a;this.y=b};Voronoi.prototype.Edge=function(b,a){this.lSite=b;this.rSite=a;
this.va=this.vb=null};Voronoi.prototype.Halfedge=function(d,e,a){this.site=e;this.edge=d;if(a){this.angle=Math.atan2(a.y-e.y,a.x-e.x)
}else{var c=d.va,b=d.vb;this.angle=d.lSite===e?Math.atan2(b.x-c.x,c.y-b.y):Math.atan2(c.x-b.x,b.y-c.y)}};Voronoi.prototype.createHalfedge=function(b,c,a){return new this.Halfedge(b,c,a)
};Voronoi.prototype.Halfedge.prototype.getStartpoint=function(){return this.edge.lSite===this.site?this.edge.va:this.edge.vb
};Voronoi.prototype.Halfedge.prototype.getEndpoint=function(){return this.edge.lSite===this.site?this.edge.vb:this.edge.va
};Voronoi.prototype.createVertex=function(a,c){var b=this.vertexJunkyard.pop();if(!b){b=new this.Vertex(a,c)}else{b.x=a;b.y=c
}this.vertices.push(b);return b};Voronoi.prototype.createEdge=function(e,a,d,b){var c=this.edgeJunkyard.pop();if(!c){c=new this.Edge(e,a)
}else{c.lSite=e;c.rSite=a;c.va=c.vb=null}this.edges.push(c);if(d){this.setEdgeStartpoint(c,e,a,d)}if(b){this.setEdgeEndpoint(c,e,a,b)
}this.cells[e.voronoiId].halfedges.push(this.createHalfedge(c,e,a));this.cells[a.voronoiId].halfedges.push(this.createHalfedge(c,a,e));
return c};Voronoi.prototype.createBorderEdge=function(d,c,a){var b=this.edgeJunkyard.pop();if(!b){b=new this.Edge(d,null)
}else{b.lSite=d;b.rSite=null}b.va=c;b.vb=a;this.edges.push(b);return b};Voronoi.prototype.setEdgeStartpoint=function(b,d,a,c){if(!b.va&&!b.vb){b.va=c;
b.lSite=d;b.rSite=a}else{if(b.lSite===a){b.vb=c}else{b.va=c}}};Voronoi.prototype.setEdgeEndpoint=function(b,d,a,c){this.setEdgeStartpoint(b,a,d,c)
};Voronoi.prototype.Beachsection=function(){};Voronoi.prototype.createBeachsection=function(a){var b=this.beachsectionJunkyard.pop();
if(!b){b=new this.Beachsection()}b.site=a;return b};Voronoi.prototype.leftBreakPoint=function(e,f){var a=e.site,m=a.x,l=a.y,k=l-f;
if(!k){return m}var n=e.rbPrevious;if(!n){return -Infinity}a=n.site;var h=a.x,g=a.y,d=g-f;if(!d){return h}var c=h-m,j=1/k-1/d,i=c/d;
if(j){return(-i+this.sqrt(i*i-2*j*(c*c/(-2*d)-g+d/2+l-k/2)))/j+m}return(m+h)/2};Voronoi.prototype.rightBreakPoint=function(b,c){var d=b.rbNext;
if(d){return this.leftBreakPoint(d,c)}var a=b.site;return a.y===c?a.x:Infinity};Voronoi.prototype.detachBeachsection=function(a){this.detachCircleEvent(a);
this.beachline.rbRemoveNode(a);this.beachsectionJunkyard.push(a)};Voronoi.prototype.removeBeachsection=function(b){var a=b.circleEvent,j=a.x,h=a.ycenter,e=this.createVertex(j,h),f=b.rbPrevious,d=b.rbNext,l=[b],g=Math.abs;
this.detachBeachsection(b);var m=f;while(m.circleEvent&&g(j-m.circleEvent.x)<1e-9&&g(h-m.circleEvent.ycenter)<1e-9){f=m.rbPrevious;
l.unshift(m);this.detachBeachsection(m);m=f}l.unshift(m);this.detachCircleEvent(m);var c=d;while(c.circleEvent&&g(j-c.circleEvent.x)<1e-9&&g(h-c.circleEvent.ycenter)<1e-9){d=c.rbNext;
l.push(c);this.detachBeachsection(c);c=d}l.push(c);this.detachCircleEvent(c);var k=l.length,i;for(i=1;i<k;i++){c=l[i];m=l[i-1];
this.setEdgeStartpoint(c.edge,m.site,c.site,e)}m=l[0];c=l[k-1];c.edge=this.createEdge(m.site,c.site,undefined,e);this.attachCircleEvent(m);
this.attachCircleEvent(c)};Voronoi.prototype.addBeachsection=function(l){var j=l.x,n=l.y;var p,m,v,q,o=this.beachline.root;
while(o){v=this.leftBreakPoint(o,n)-j;if(v>1e-9){o=o.rbLeft}else{q=j-this.rightBreakPoint(o,n);if(q>1e-9){if(!o.rbRight){p=o;
break}o=o.rbRight}else{if(v>-1e-9){p=o.rbPrevious;m=o}else{if(q>-1e-9){p=o;m=o.rbNext}else{p=m=o}}break}}}var e=this.createBeachsection(l);
this.beachline.rbInsertSuccessor(p,e);if(!p&&!m){return}if(p===m){this.detachCircleEvent(p);m=this.createBeachsection(p.site);
this.beachline.rbInsertSuccessor(e,m);e.edge=m.edge=this.createEdge(p.site,e.site);this.attachCircleEvent(p);this.attachCircleEvent(m);
return}if(p&&!m){e.edge=this.createEdge(p.site,e.site);return}if(p!==m){this.detachCircleEvent(p);this.detachCircleEvent(m);
var h=p.site,k=h.x,i=h.y,t=l.x-k,r=l.y-i,a=m.site,c=a.x-k,b=a.y-i,u=2*(t*b-r*c),g=t*t+r*r,f=c*c+b*b,s=this.createVertex((b*g-r*f)/u+k,(t*f-c*g)/u+i);
this.setEdgeStartpoint(m.edge,h,a,s);e.edge=this.createEdge(h,l,undefined,s);m.edge=this.createEdge(l,a,undefined,s);this.attachCircleEvent(p);
this.attachCircleEvent(m);return}};Voronoi.prototype.CircleEvent=function(){this.arc=null;this.rbLeft=null;this.rbNext=null;
this.rbParent=null;this.rbPrevious=null;this.rbRed=false;this.rbRight=null;this.site=null;this.x=this.y=this.ycenter=0};Voronoi.prototype.attachCircleEvent=function(i){var r=i.rbPrevious,o=i.rbNext;
if(!r||!o){return}var k=r.site,u=i.site,c=o.site;if(k===c){return}var t=u.x,s=u.y,n=k.x-t,l=k.y-s,f=c.x-t,e=c.y-s;var v=2*(n*e-l*f);
if(v>=-2e-12){return}var h=n*n+l*l,g=f*f+e*e,m=(e*h-l*g)/v,j=(n*g-f*h)/v,b=j+s;var q=this.circleEventJunkyard.pop();if(!q){q=new this.CircleEvent()
}q.arc=i;q.site=u;q.x=m+t;q.y=b+this.sqrt(m*m+j*j);q.ycenter=b;i.circleEvent=q;var a=null,p=this.circleEvents.root;while(p){if(q.y<p.y||(q.y===p.y&&q.x<=p.x)){if(p.rbLeft){p=p.rbLeft
}else{a=p.rbPrevious;break}}else{if(p.rbRight){p=p.rbRight}else{a=p;break}}}this.circleEvents.rbInsertSuccessor(a,q);if(!a){this.firstCircleEvent=q
}};Voronoi.prototype.detachCircleEvent=function(b){var a=b.circleEvent;if(a){if(!a.rbPrevious){this.firstCircleEvent=a.rbNext
}this.circleEvents.rbRemoveNode(a);this.circleEventJunkyard.push(a);b.circleEvent=null}};Voronoi.prototype.connectEdge=function(l,a){var b=l.vb;
if(!!b){return true}var c=l.va,p=a.xl,n=a.xr,r=a.yt,d=a.yb,o=l.lSite,e=l.rSite,i=o.x,h=o.y,k=e.x,j=e.y,g=(i+k)/2,f=(h+j)/2,m,q;
this.cells[o.voronoiId].closeMe=true;this.cells[e.voronoiId].closeMe=true;if(j!==h){m=(i-k)/(j-h);q=f-m*g}if(m===undefined){if(g<p||g>=n){return false
}if(i>k){if(!c||c.y<r){c=this.createVertex(g,r)}else{if(c.y>=d){return false}}b=this.createVertex(g,d)}else{if(!c||c.y>d){c=this.createVertex(g,d)
}else{if(c.y<r){return false}}b=this.createVertex(g,r)}}else{if(m<-1||m>1){if(i>k){if(!c||c.y<r){c=this.createVertex((r-q)/m,r)
}else{if(c.y>=d){return false}}b=this.createVertex((d-q)/m,d)}else{if(!c||c.y>d){c=this.createVertex((d-q)/m,d)}else{if(c.y<r){return false
}}b=this.createVertex((r-q)/m,r)}}else{if(h<j){if(!c||c.x<p){c=this.createVertex(p,m*p+q)}else{if(c.x>=n){return false}}b=this.createVertex(n,m*n+q)
}else{if(!c||c.x>n){c=this.createVertex(n,m*n+q)}else{if(c.x<p){return false}}b=this.createVertex(p,m*p+q)}}}l.va=c;l.vb=b;
return true};Voronoi.prototype.clipEdge=function(d,i){var b=d.va.x,l=d.va.y,h=d.vb.x,g=d.vb.y,f=0,e=1,k=h-b,j=g-l;var c=b-i.xl;
if(k===0&&c<0){return false}var a=-c/k;if(k<0){if(a<f){return false}if(a<e){e=a}}else{if(k>0){if(a>e){return false}if(a>f){f=a
}}}c=i.xr-b;if(k===0&&c<0){return false}a=c/k;if(k<0){if(a>e){return false}if(a>f){f=a}}else{if(k>0){if(a<f){return false
}if(a<e){e=a}}}c=l-i.yt;if(j===0&&c<0){return false}a=-c/j;if(j<0){if(a<f){return false}if(a<e){e=a}}else{if(j>0){if(a>e){return false
}if(a>f){f=a}}}c=i.yb-l;if(j===0&&c<0){return false}a=c/j;if(j<0){if(a>e){return false}if(a>f){f=a}}else{if(j>0){if(a<f){return false
}if(a<e){e=a}}}if(f>0){d.va=this.createVertex(b+f*k,l+f*j)}if(e<1){d.vb=this.createVertex(b+e*k,l+e*j)}if(f>0||e<1){this.cells[d.lSite.voronoiId].closeMe=true;
this.cells[d.rSite.voronoiId].closeMe=true}return true};Voronoi.prototype.clipEdges=function(e){var a=this.edges,d=a.length,c,b=Math.abs;
while(d--){c=a[d];if(!this.connectEdge(c,e)||!this.clipEdge(c,e)||(b(c.va.x-c.vb.x)<1e-9&&b(c.va.y-c.vb.y)<1e-9)){c.va=c.vb=null;
a.splice(d,1)}}};Voronoi.prototype.closeCells=function(p){var g=p.xl,d=p.xr,m=p.yt,j=p.yb,q=this.cells,a=q.length,n,e,o,c,b,l,k,i,f,h=Math.abs;
while(a--){n=q[a];if(!n.prepareHalfedges()){continue}if(!n.closeMe){continue}o=n.halfedges;c=o.length;e=0;while(e<c){l=o[e].getEndpoint();
i=o[(e+1)%c].getStartpoint();if(h(l.x-i.x)>=1e-9||h(l.y-i.y)>=1e-9){switch(true){case this.equalWithEpsilon(l.x,g)&&this.lessThanWithEpsilon(l.y,j):f=this.equalWithEpsilon(i.x,g);
k=this.createVertex(g,f?i.y:j);b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));c++;
if(f){break}l=k;case this.equalWithEpsilon(l.y,j)&&this.lessThanWithEpsilon(l.x,d):f=this.equalWithEpsilon(i.y,j);k=this.createVertex(f?i.x:d,j);
b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));c++;if(f){break}l=k;case this.equalWithEpsilon(l.x,d)&&this.greaterThanWithEpsilon(l.y,m):f=this.equalWithEpsilon(i.x,d);
k=this.createVertex(d,f?i.y:m);b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));c++;
if(f){break}l=k;case this.equalWithEpsilon(l.y,m)&&this.greaterThanWithEpsilon(l.x,g):f=this.equalWithEpsilon(i.y,m);k=this.createVertex(f?i.x:g,m);
b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));c++;if(f){break}l=k;f=this.equalWithEpsilon(i.x,g);
k=this.createVertex(g,f?i.y:j);b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));c++;
if(f){break}l=k;f=this.equalWithEpsilon(i.y,j);k=this.createVertex(f?i.x:d,j);b=this.createBorderEdge(n.site,l,k);e++;o.splice(e,0,this.createHalfedge(b,n.site,null));
c++;if(f){break}l=k;f=this.equalWithEpsilon(i.x,d);k=this.createVertex(d,f?i.y:m);b=this.createBorderEdge(n.site,l,k);e++;
o.splice(e,0,this.createHalfedge(b,n.site,null));c++;if(f){break}default:throw"Voronoi.closeCells() > this makes no sense!"
}}e++}n.closeMe=false}};Voronoi.prototype.quantizeSites=function(c){var b=this.ε,d=c.length,a;while(d--){a=c[d];a.x=Math.floor(a.x/b)*b;
a.y=Math.floor(a.y/b)*b}};Voronoi.prototype.recycle=function(a){if(a){if(a instanceof this.Diagram){this.toRecycle=a}else{throw"Voronoi.recycleDiagram() > Need a Diagram object."
}}};Voronoi.prototype.compute=function(i,j){var d=new Date();this.reset();if(this.toRecycle){this.vertexJunkyard=this.vertexJunkyard.concat(this.toRecycle.vertices);
this.edgeJunkyard=this.edgeJunkyard.concat(this.toRecycle.edges);this.cellJunkyard=this.cellJunkyard.concat(this.toRecycle.cells);
this.toRecycle=null}var h=i.slice(0);h.sort(function(n,m){var o=m.y-n.y;if(o){return o}return m.x-n.x});var b=h.pop(),l=0,f,e,k=this.cells,a;
for(;;){a=this.firstCircleEvent;if(b&&(!a||b.y<a.y||(b.y===a.y&&b.x<a.x))){if(b.x!==f||b.y!==e){k[l]=this.createCell(b);b.voronoiId=l++;
this.addBeachsection(b);e=b.y;f=b.x}b=h.pop()}else{if(a){this.removeBeachsection(a.arc)}else{break}}}this.clipEdges(j);this.closeCells(j);
var c=new Date();var g=new this.Diagram();g.cells=this.cells;g.edges=this.edges;g.vertices=this.vertices;g.execTime=c.getTime()-d.getTime();
this.reset();return g};