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- !function(t,i){"object"==typeof exports&&"undefined"!=typeof module?module.exports=i():"function"==typeof define&&define.amd?define(i):(t="undefined"!=typeof globalThis?globalThis:t||self).Delaunator=i()}(this,(function(){"use strict";const t=11102230246251565e-32,i=134217729,s=(3+8*t)*t;function e(t,i,s,e,n){let h,r,l,o,a=i[0],f=e[0],c=0,u=0;f>a==f>-a?(h=a,a=i[++c]):(h=f,f=e[++u]);let _=0;if(c<t&&u<s)for(f>a==f>-a?(r=a+h,l=h-(r-a),a=i[++c]):(r=f+h,l=h-(r-f),f=e[++u]),h=r,0!==l&&(n[_++]=l);c<t&&u<s;)f>a==f>-a?(r=h+a,o=r-h,l=h-(r-o)+(a-o),a=i[++c]):(r=h+f,o=r-h,l=h-(r-o)+(f-o),f=e[++u]),h=r,0!==l&&(n[_++]=l);for(;c<t;)r=h+a,o=r-h,l=h-(r-o)+(a-o),a=i[++c],h=r,0!==l&&(n[_++]=l);for(;u<s;)r=h+f,o=r-h,l=h-(r-o)+(f-o),f=e[++u],h=r,0!==l&&(n[_++]=l);return 0===h&&0!==_||(n[_++]=h),_}function n(t){return new Float64Array(t)}const h=22204460492503146e-32,r=11093356479670487e-47,l=n(4),o=n(8),a=n(12),f=n(16),c=n(4);function u(t,n,u,_,d,g){const y=(n-g)*(u-d),w=(t-d)*(_-g),b=y-w,A=Math.abs(y+w);return Math.abs(b)>=33306690738754716e-32*A?b:-function(t,n,u,_,d,g,y){let w,b,A,k,M,p,x,S,T,z,U,m,K,L,v,F,P,E;const H=t-d,I=u-d,N=n-g,j=_-g;L=H*j,p=i*H,x=p-(p-H),S=H-x,p=i*j,T=p-(p-j),z=j-T,v=S*z-(L-x*T-S*T-x*z),F=N*I,p=i*N,x=p-(p-N),S=N-x,p=i*I,T=p-(p-I),z=I-T,P=S*z-(F-x*T-S*T-x*z),U=v-P,M=v-U,l[0]=v-(U+M)+(M-P),m=L+U,M=m-L,K=L-(m-M)+(U-M),U=K-F,M=K-U,l[1]=K-(U+M)+(M-F),E=m+U,M=E-m,l[2]=m-(E-M)+(U-M),l[3]=E;let q=function(t,i){let s=i[0];for(let e=1;e<t;e++)s+=i[e];return s}(4,l),D=h*y;if(q>=D||-q>=D)return q;if(M=t-H,w=t-(H+M)+(M-d),M=u-I,A=u-(I+M)+(M-d),M=n-N,b=n-(N+M)+(M-g),M=_-j,k=_-(j+M)+(M-g),0===w&&0===b&&0===A&&0===k)return q;if(D=r*y+s*Math.abs(q),q+=H*k+j*w-(N*A+I*b),q>=D||-q>=D)return q;L=w*j,p=i*w,x=p-(p-w),S=w-x,p=i*j,T=p-(p-j),z=j-T,v=S*z-(L-x*T-S*T-x*z),F=b*I,p=i*b,x=p-(p-b),S=b-x,p=i*I,T=p-(p-I),z=I-T,P=S*z-(F-x*T-S*T-x*z),U=v-P,M=v-U,c[0]=v-(U+M)+(M-P),m=L+U,M=m-L,K=L-(m-M)+(U-M),U=K-F,M=K-U,c[1]=K-(U+M)+(M-F),E=m+U,M=E-m,c[2]=m-(E-M)+(U-M),c[3]=E;const B=e(4,l,4,c,o);L=H*k,p=i*H,x=p-(p-H),S=H-x,p=i*k,T=p-(p-k),z=k-T,v=S*z-(L-x*T-S*T-x*z),F=N*A,p=i*N,x=p-(p-N),S=N-x,p=i*A,T=p-(p-A),z=A-T,P=S*z-(F-x*T-S*T-x*z),U=v-P,M=v-U,c[0]=v-(U+M)+(M-P),m=L+U,M=m-L,K=L-(m-M)+(U-M),U=K-F,M=K-U,c[1]=K-(U+M)+(M-F),E=m+U,M=E-m,c[2]=m-(E-M)+(U-M),c[3]=E;const C=e(B,o,4,c,a);L=w*k,p=i*w,x=p-(p-w),S=w-x,p=i*k,T=p-(p-k),z=k-T,v=S*z-(L-x*T-S*T-x*z),F=b*A,p=i*b,x=p-(p-b),S=b-x,p=i*A,T=p-(p-A),z=A-T,P=S*z-(F-x*T-S*T-x*z),U=v-P,M=v-U,c[0]=v-(U+M)+(M-P),m=L+U,M=m-L,K=L-(m-M)+(U-M),U=K-F,M=K-U,c[1]=K-(U+M)+(M-F),E=m+U,M=E-m,c[2]=m-(E-M)+(U-M),c[3]=E;const G=e(C,a,4,c,f);return f[G-1]}(t,n,u,_,d,g,A)}const _=Math.pow(2,-52),d=new Uint32Array(512);class g{static from(t,i=M,s=p){const e=t.length,n=new Float64Array(2*e);for(let h=0;h<e;h++){const e=t[h];n[2*h]=i(e),n[2*h+1]=s(e)}return new g(n)}constructor(t){const i=t.length>>1;if(i>0&&"number"!=typeof t[0])throw new Error("Expected coords to contain numbers.");this.coords=t;const s=Math.max(2*i-5,0);this._triangles=new Uint32Array(3*s),this._halfedges=new Int32Array(3*s),this._hashSize=Math.ceil(Math.sqrt(i)),this._hullPrev=new Uint32Array(i),this._hullNext=new Uint32Array(i),this._hullTri=new Uint32Array(i),this._hullHash=new Int32Array(this._hashSize),this._ids=new Uint32Array(i),this._dists=new Float64Array(i),this.update()}update(){const{coords:t,_hullPrev:i,_hullNext:s,_hullTri:e,_hullHash:n}=this,h=t.length>>1;let r=1/0,l=1/0,o=-1/0,a=-1/0;for(let i=0;i<h;i++){const s=t[2*i],e=t[2*i+1];s<r&&(r=s),e<l&&(l=e),s>o&&(o=s),e>a&&(a=e),this._ids[i]=i}const f=(r+o)/2,c=(l+a)/2;let d,g,w;for(let i=0,s=1/0;i<h;i++){const e=y(f,c,t[2*i],t[2*i+1]);e<s&&(d=i,s=e)}const k=t[2*d],M=t[2*d+1];for(let i=0,s=1/0;i<h;i++){if(i===d)continue;const e=y(k,M,t[2*i],t[2*i+1]);e<s&&e>0&&(g=i,s=e)}let p=t[2*g],x=t[2*g+1],S=1/0;for(let i=0;i<h;i++){if(i===d||i===g)continue;const s=b(k,M,p,x,t[2*i],t[2*i+1]);s<S&&(w=i,S=s)}let T=t[2*w],z=t[2*w+1];if(S===1/0){for(let i=0;i<h;i++)this._dists[i]=t[2*i]-t[0]||t[2*i+1]-t[1];A(this._ids,this._dists,0,h-1);const i=new Uint32Array(h);let s=0;for(let t=0,e=-1/0;t<h;t++){const n=this._ids[t],h=this._dists[n];h>e&&(i[s++]=n,e=h)}return this.hull=i.subarray(0,s),this.triangles=new Uint32Array(0),void(this.halfedges=new Uint32Array(0))}if(u(k,M,p,x,T,z)<0){const t=g,i=p,s=x;g=w,p=T,x=z,w=t,T=i,z=s}const U=function(t,i,s,e,n,h){const r=s-t,l=e-i,o=n-t,a=h-i,f=r*r+l*l,c=o*o+a*a,u=.5/(r*a-l*o);return{x:t+(a*f-l*c)*u,y:i+(r*c-o*f)*u}}(k,M,p,x,T,z);this._cx=U.x,this._cy=U.y;for(let i=0;i<h;i++)this._dists[i]=y(t[2*i],t[2*i+1],U.x,U.y);A(this._ids,this._dists,0,h-1),this._hullStart=d;let m=3;s[d]=i[w]=g,s[g]=i[d]=w,s[w]=i[g]=d,e[d]=0,e[g]=1,e[w]=2,n.fill(-1),n[this._hashKey(k,M)]=d,n[this._hashKey(p,x)]=g,n[this._hashKey(T,z)]=w,this.trianglesLen=0,this._addTriangle(d,g,w,-1,-1,-1);for(let h,r,l=0;l<this._ids.length;l++){const o=this._ids[l],a=t[2*o],f=t[2*o+1];if(l>0&&Math.abs(a-h)<=_&&Math.abs(f-r)<=_)continue;if(h=a,r=f,o===d||o===g||o===w)continue;let c=0;for(let t=0,i=this._hashKey(a,f);t<this._hashSize&&(c=n[(i+t)%this._hashSize],-1===c||c===s[c]);t++);c=i[c];let y,b=c;for(;y=s[b],u(a,f,t[2*b],t[2*b+1],t[2*y],t[2*y+1])>=0;)if(b=y,b===c){b=-1;break}if(-1===b)continue;let A=this._addTriangle(b,o,s[b],-1,-1,e[b]);e[o]=this._legalize(A+2),e[b]=A,m++;let k=s[b];for(;y=s[k],u(a,f,t[2*k],t[2*k+1],t[2*y],t[2*y+1])<0;)A=this._addTriangle(k,o,y,e[o],-1,e[k]),e[o]=this._legalize(A+2),s[k]=k,m--,k=y;if(b===c)for(;y=i[b],u(a,f,t[2*y],t[2*y+1],t[2*b],t[2*b+1])<0;)A=this._addTriangle(y,o,b,-1,e[b],e[y]),this._legalize(A+2),e[y]=A,s[b]=b,m--,b=y;this._hullStart=i[o]=b,s[b]=i[k]=o,s[o]=k,n[this._hashKey(a,f)]=o,n[this._hashKey(t[2*b],t[2*b+1])]=b}this.hull=new Uint32Array(m);for(let t=0,i=this._hullStart;t<m;t++)this.hull[t]=i,i=s[i];this.triangles=this._triangles.subarray(0,this.trianglesLen),this.halfedges=this._halfedges.subarray(0,this.trianglesLen)}_hashKey(t,i){return Math.floor(function(t,i){const s=t/(Math.abs(t)+Math.abs(i));return(i>0?3-s:1+s)/4}(t-this._cx,i-this._cy)*this._hashSize)%this._hashSize}_legalize(t){const{_triangles:i,_halfedges:s,coords:e}=this;let n=0,h=0;for(;;){const r=s[t],l=t-t%3;if(h=l+(t+2)%3,-1===r){if(0===n)break;t=d[--n];continue}const o=r-r%3,a=l+(t+1)%3,f=o+(r+2)%3,c=i[h],u=i[t],_=i[a],g=i[f];if(w(e[2*c],e[2*c+1],e[2*u],e[2*u+1],e[2*_],e[2*_+1],e[2*g],e[2*g+1])){i[t]=g,i[r]=c;const e=s[f];if(-1===e){let i=this._hullStart;do{if(this._hullTri[i]===f){this._hullTri[i]=t;break}i=this._hullPrev[i]}while(i!==this._hullStart)}this._link(t,e),this._link(r,s[h]),this._link(h,f);const l=o+(r+1)%3;n<d.length&&(d[n++]=l)}else{if(0===n)break;t=d[--n]}}return h}_link(t,i){this._halfedges[t]=i,-1!==i&&(this._halfedges[i]=t)}_addTriangle(t,i,s,e,n,h){const r=this.trianglesLen;return this._triangles[r]=t,this._triangles[r+1]=i,this._triangles[r+2]=s,this._link(r,e),this._link(r+1,n),this._link(r+2,h),this.trianglesLen+=3,r}}function y(t,i,s,e){const n=t-s,h=i-e;return n*n+h*h}function w(t,i,s,e,n,h,r,l){const o=t-r,a=i-l,f=s-r,c=e-l,u=n-r,_=h-l,d=f*f+c*c,g=u*u+_*_;return o*(c*g-d*_)-a*(f*g-d*u)+(o*o+a*a)*(f*_-c*u)<0}function b(t,i,s,e,n,h){const r=s-t,l=e-i,o=n-t,a=h-i,f=r*r+l*l,c=o*o+a*a,u=.5/(r*a-l*o),_=(a*f-l*c)*u,d=(r*c-o*f)*u;return _*_+d*d}function A(t,i,s,e){if(e-s<=20)for(let n=s+1;n<=e;n++){const e=t[n],h=i[e];let r=n-1;for(;r>=s&&i[t[r]]>h;)t[r+1]=t[r--];t[r+1]=e}else{let n=s+1,h=e;k(t,s+e>>1,n),i[t[s]]>i[t[e]]&&k(t,s,e),i[t[n]]>i[t[e]]&&k(t,n,e),i[t[s]]>i[t[n]]&&k(t,s,n);const r=t[n],l=i[r];for(;;){do{n++}while(i[t[n]]<l);do{h--}while(i[t[h]]>l);if(h<n)break;k(t,n,h)}t[s+1]=t[h],t[h]=r,e-n+1>=h-s?(A(t,i,n,e),A(t,i,s,h-1)):(A(t,i,s,h-1),A(t,i,n,e))}}function k(t,i,s){const e=t[i];t[i]=t[s],t[s]=e}function M(t){return t[0]}function p(t){return t[1]}return g}));
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