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${e.length}.`);this.terrain=e,this.martini=r,this.errors=new Float32Array(e.length),this.update()}update(){let{numTriangles:e,numParentTriangles:r,coords:t,gridSize:n}=this.martini,{terrain:i,errors:o}=this;for(let a=e-1;a>=0;a--){let l=a*4,c=t[l+0],h=t[l+1],u=t[l+2],f=t[l+3],d=c+u>>1,g=h+f>>1,m=d+g-h,_=g+c-d,E=(i[h*n+c]+i[f*n+u])/2,p=g*n+d,T=Math.abs(E-i[p]);if(o[p]=Math.max(o[p],T),a<r){let x=(h+_>>1)*n+(c+m>>1),y=(f+_>>1)*n+(u+m>>1);o[p]=Math.max(o[p],o[x],o[y])}}}getMesh(e=0){let{gridSize:r,indices:t}=this.martini,{errors:n}=this,i=0,o=0,a=r-1;t.fill(0);function l(d,g,m,_,E,p){let T=d+m>>1,x=g+_>>1;Math.abs(d-E)+Math.abs(g-p)>1&&n[x*r+T]>e?(l(E,p,d,g,T,x),l(m,_,E,p,T,x)):(t[g*r+d]=t[g*r+d]||++i,t[_*r+m]=t[_*r+m]||++i,t[p*r+E]=t[p*r+E]||++i,o++)}l(0,0,a,a,a,0),l(a,a,0,0,0,a);let c=new Uint16Array(i*2),h=new Uint32Array(o*3),u=0;function f(d,g,m,_,E,p){let T=d+m>>1,x=g+_>>1;if(Math.abs(d-E)+Math.abs(g-p)>1&&n[x*r+T]>e)f(E,p,d,g,T,x),f(m,_,E,p,T,x);else{let 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t=this._pending[r],n=2*this.triangles[t*3+0],i=2*this.triangles[t*3+1],o=2*this.triangles[t*3+2];this._findCandidate(e[n],e[n+1],e[i],e[i+1],e[o],e[o+1],t)}this._pendingLen=0}_findCandidate(e,r,t,n,i,o,a){let l=Math.min(e,t,i),c=Math.min(r,n,o),h=Math.max(e,t,i),u=Math.max(r,n,o),f=M(t,n,i,o,l,c),d=M(i,o,e,r,l,c),g=M(e,r,t,n,l,c),m=n-r,_=e-t,E=o-n,p=t-i,T=r-o,x=i-e,y=M(e,r,t,n,i,o),S=this.heightAt(e,r)/y,I=this.heightAt(t,n)/y,he=this.heightAt(i,o)/y,z=0,P=0,w=0,W=0;for(let k=c;k<=u;k++){let A=0;f<0&&E!==0&&(A=Math.max(A,Math.floor(-f/E))),d<0&&T!==0&&(A=Math.max(A,Math.floor(-d/T))),g<0&&m!==0&&(A=Math.max(A,Math.floor(-g/m)));let Q=f+E*A,j=d+T*A,Z=g+m*A,re=!1;for(let C=l+A;C<=h;C++){if(Q>=0&&j>=0&&Z>=0){re=!0;let ue=S*Q+I*j+he*Z,R=Math.abs(ue-this.heightAt(C,k));W+=R*R,R>z&&(z=R,P=C,w=k)}else if(re)break;Q+=E,j+=T,Z+=m}f+=p,d+=x,g+=_}(P===e&&w===r||P===t&&w===n||P===i&&w===o)&&(z=0),this._candidates[2*a]=P,this._candidates[2*a+1]=w,this._rms[a]=W,this._queuePush(a,z,W)}_step(){let e=this._queuePop(),r=e*3+0,t=e*3+1,n=e*3+2,i=this.triangles[r],o=this.triangles[t],a=this.triangles[n],l=this.coords[2*i],c=this.coords[2*i+1],h=this.coords[2*o],u=this.coords[2*o+1],f=this.coords[2*a],d=this.coords[2*a+1],g=this._candidates[2*e],m=this._candidates[2*e+1],_=this._addPoint(g,m);if(M(l,c,h,u,g,m)===0)this._handleCollinear(_,r);else if(M(h,u,f,d,g,m)===0)this._handleCollinear(_,t);else if(M(f,d,l,c,g,m)===0)this._handleCollinear(_,n);else{let E=this._halfedges[r],p=this._halfedges[t],T=this._halfedges[n],x=this._addTriangle(i,o,_,E,-1,-1,r),y=this._addTriangle(o,a,_,p,-1,x+1),S=this._addTriangle(a,i,_,T,x+2,y+1);this._legalize(x),this._legalize(y),this._legalize(S)}}_addPoint(e,r){let t=this.coords.length>>1;return this.coords.push(e,r),t}_addTriangle(e,r,t,n,i,o,a=this.triangles.length){let l=a/3;return 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t=r-r%3,n=t+(r+1)%3,i=t+(r+2)%3,o=this.triangles[i],a=this.triangles[r],l=this.triangles[n],c=this._halfedges[n],h=this._halfedges[i],u=this._halfedges[r];if(u<0){let S=this._addTriangle(e,o,a,-1,h,-1,t),I=this._addTriangle(o,e,l,S,-1,c);this._legalize(S+1),this._legalize(I+2);return}let f=u-u%3,d=f+(u+2)%3,g=f+(u+1)%3,m=this.triangles[d],_=this._halfedges[d],E=this._halfedges[g];this._queueRemove(f/3);let p=this._addTriangle(o,a,e,h,-1,-1,t),T=this._addTriangle(a,m,e,E,-1,p+1,f),x=this._addTriangle(m,l,e,_,-1,T+1),y=this._addTriangle(l,o,e,c,p+2,x+1);this._legalize(p),this._legalize(T),this._legalize(x),this._legalize(y)}_queuePush(e,r,t){let n=this._queue.length;this._queueIndices[e]=n,this._queue.push(e),this._errors.push(r),this._rmsSum+=t,this._queueUp(n)}_queuePop(){let e=this._queue.length-1;return this._queueSwap(0,e),this._queueDown(0,e),this._queuePopBack()}_queuePopBack(){let e=this._queue.pop();return this._errors.pop(),this._rmsSum-=this._rms[e],this._queueIndices[e]=-1,e}_queueRemove(e){let r=this._queueIndices[e];if(r<0){let n=this._pending.indexOf(e);if(n!==-1)this._pending[n]=this._pending[--this._pendingLen];else throw new Error("Broken triangulation (something went wrong).");return}let t=this._queue.length-1;t!==r&&(this._queueSwap(r,t),this._queueDown(r,t)||this._queueUp(r)),this._queuePopBack()}_queueLess(e,r){return this._errors[e]>this._errors[r]}_queueSwap(e,r){let t=this._queue[e],n=this._queue[r];this._queue[e]=n,this._queue[r]=t,this._queueIndices[t]=r,this._queueIndices[n]=e;let i=this._errors[e];this._errors[e]=this._errors[r],this._errors[r]=i}_queueUp(e){let r=e;for(;;){let t=r-1>>1;if(t===r||!this._queueLess(r,t))break;this._queueSwap(t,r),r=t}}_queueDown(e,r){let t=e;for(;;){let n=2*t+1;if(n>=r||n<0)break;let i=n+1,o=n;if(i<r&&this._queueLess(i,n)&&(o=i),!this._queueLess(o,t))break;this._queueSwap(t,o),t=o}return t>e}};function M(s,e,r,t,n,i){return(r-n)*(e-i)-(t-i)*(s-n)}function ve(s,e,r,t,n,i,o,a){let l=s-o,c=e-a,h=r-o,u=t-a,f=n-o,d=i-a,g=l*l+c*c,m=h*h+u*u,_=f*f+d*d;return l*(u*_-m*d)-c*(h*_-m*f)+g*(h*d-u*f)<0}function ae(s,e){let{meshMaxError:r,bounds:t,elevationDecoder:n}=e,{data:i,width:o,height:a}=s,l,c;switch(e.tesselator){case"martini":l=X(i,o,a,n,e.tesselator),c=oe(r,o,l);break;case"delatin":l=X(i,o,a,n,e.tesselator),c=ie(r,o,a,l);break;default:o===a&&!(a&o-1)?(l=X(i,o,a,n,"martini"),c=oe(r,o,l)):(l=X(i,o,a,n,"delatin"),c=ie(r,o,a,l));break}let{vertices:h}=c,{triangles:u}=c,f=ze(h,l,o,a,t),d=L(f);if(e.skirtHeight){let{attributes:g,triangles:m}=Y(f,u,e.skirtHeight);f=g,u=m}return{loaderData:{header:{}},header:{vertexCount:u.length,boundingBox:d},mode:4,indices:{value:Uint32Array.from(u),size:1},attributes:f}}function oe(s,e,r){let t=e+1,i=new N(t).createTile(r),{vertices:o,triangles:a}=i.getMesh(s);return{vertices:o,triangles:a}}function ie(s,e,r,t){let n=new O(t,e+1,r+1);n.run(s);let{coords:i,triangles:o}=n;return{vertices:i,triangles:o}}function X(s,e,r,t,n){let{rScaler:i,bScaler:o,gScaler:a,offset:l}=t,c=new Float32Array((e+1)*(r+1));for(let h=0,u=0;u<r;u++)for(let f=0;f<e;f++,h++){let d=h*4,g=s[d+0],m=s[d+1],_=s[d+2];c[h+u]=g*i+m*a+_*o+l}if(n==="martini"){for(let h=(e+1)*e,u=0;u<e;u++,h++)c[h]=c[h-e-1];for(let h=r,u=0;u<r+1;u++,h+=r+1)c[h]=c[h-1]}return c}function ze(s,e,r,t,n){let i=r+1,o=s.length/2,a=new Float32Array(o*3),l=new Float32Array(o*2),[c,h,u,f]=n||[0,0,r,t],d=(u-c)/r,g=(f-h)/t;for(let m=0;m<o;m++){let _=s[m*2],E=s[m*2+1],p=E*i+_;a[3*m+0]=_*d+c,a[3*m+1]=-E*g+f,a[3*m+2]=e[p],l[2*m+0]=_/r,l[2*m+1]=E/t}return{POSITION:{value:a,size:3},TEXCOORD_0:{value:l,size:2}}}var H="4.3.1";var ee={dataType:null,batchType:null,name:"Terrain",id:"terrain",module:"terrain",version:H,worker:!0,extensions:["png","pngraw","jpg","jpeg","gif","webp","bmp"],mimeTypes:["image/png","image/jpeg","image/gif","image/webp","image/bmp"],options:{terrain:{tesselator:"auto",bounds:void 0,meshMaxError:10,elevationDecoder:{rScaler:1,gScaler:0,bScaler:0,offset:0},skirtHeight:void 0}}};var te={dataType:null,batchType:null,name:"Quantized Mesh",id:"quantized-mesh",module:"terrain",version:H,worker:!0,extensions:["terrain"],mimeTypes:["application/vnd.quantized-mesh"],options:{"quantized-mesh":{bounds:[0,0,1,1],skirtHeight:null}}};var ce={...ee,parse:le};async function le(s,e,r){let t={...e,mimeType:"application/x.image",image:{...e?.image,type:"data"}},n=await J(s,[],t,r),i={...ce.options.terrain,...e?.terrain};return ae(n,i)}var ke={...te,parseSync:(s,e)=>V(s,e?.["quantized-mesh"]),parse:async(s,e)=>V(s,e?.["quantized-mesh"])};return xe(v);})();
      return __exports__;
      });