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| /** | |
| * Bundled by jsDelivr using Rollup v2.79.1 and Terser v5.19.2. | |
| * Original file: /npm/d3-delaunay@6.0.4/src/index.js | |
| * | |
| * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files | |
| */ | |
| import t from"../delaunator@5.0.1/e67acb27.js";const e=1e-6;class i{constructor(){this._x0=this._y0=this._x1=this._y1=null,this._=""}moveTo(t,e){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+e}`}closePath(){null!==this._x1&&(this._x1=this._x0,this._y1=this._y0,this._+="Z")}lineTo(t,e){this._+=`L${this._x1=+t},${this._y1=+e}`}arc(t,i,n){const s=(t=+t)+(n=+n),l=i=+i;if(n<0)throw new Error("negative radius");null===this._x1?this._+=`M${s},${l}`:(Math.abs(this._x1-s)>e||Math.abs(this._y1-l)>e)&&(this._+="L"+s+","+l),n&&(this._+=`A${n},${n},0,1,1,${t-n},${i}A${n},${n},0,1,1,${this._x1=s},${this._y1=l}`)}rect(t,e,i,n){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+e}h${+i}v${+n}h${-i}Z`}value(){return this._||null}}class n{constructor(){this._=[]}moveTo(t,e){this._.push([t,e])}closePath(){this._.push(this._[0].slice())}lineTo(t,e){this._.push([t,e])}value(){return this._.length?this._:null}}class s{constructor(t,[e,i,n,s]=[0,0,960,500]){if(!((n=+n)>=(e=+e)&&(s=+s)>=(i=+i)))throw new Error("invalid bounds");this.delaunay=t,this._circumcenters=new Float64Array(2*t.points.length),this.vectors=new Float64Array(2*t.points.length),this.xmax=n,this.xmin=e,this.ymax=s,this.ymin=i,this._init()}update(){return this.delaunay.update(),this._init(),this}_init(){const{delaunay:{points:t,hull:e,triangles:i},vectors:n}=this;let s,l;const h=this.circumcenters=this._circumcenters.subarray(0,i.length/3*2);for(let n,r,o=0,a=0,c=i.length;o<c;o+=3,a+=2){const c=2*i[o],u=2*i[o+1],g=2*i[o+2],d=t[c],f=t[c+1],m=t[u],_=t[u+1],x=t[g],y=t[g+1],p=m-d,v=_-f,w=x-d,T=y-f,$=2*(p*T-v*w);if(Math.abs($)<1e-9){if(void 0===s){s=l=0;for(const i of e)s+=t[2*i],l+=t[2*i+1];s/=e.length,l/=e.length}const i=1e9*Math.sign((s-d)*T-(l-f)*w);n=(d+x)/2-i*T,r=(f+y)/2+i*w}else{const t=1/$,e=p*p+v*v,i=w*w+T*T;n=d+(T*e-v*i)*t,r=f+(p*i-w*e)*t}h[a]=n,h[a+1]=r}let r,o,a,c=e[e.length-1],u=4*c,g=t[2*c],d=t[2*c+1];n.fill(0);for(let i=0;i<e.length;++i)c=e[i],r=u,o=g,a=d,u=4*c,g=t[2*c],d=t[2*c+1],n[r+2]=n[u]=a-d,n[r+3]=n[u+1]=g-o}render(t){const e=null==t?t=new i:void 0,{delaunay:{halfedges:n,inedges:s,hull:l},circumcenters:h,vectors:r}=this;if(l.length<=1)return null;for(let e=0,i=n.length;e<i;++e){const i=n[e];if(i<e)continue;const s=2*Math.floor(e/3),l=2*Math.floor(i/3),r=h[s],o=h[s+1],a=h[l],c=h[l+1];this._renderSegment(r,o,a,c,t)}let o,a=l[l.length-1];for(let e=0;e<l.length;++e){o=a,a=l[e];const i=2*Math.floor(s[a]/3),n=h[i],c=h[i+1],u=4*o,g=this._project(n,c,r[u+2],r[u+3]);g&&this._renderSegment(n,c,g[0],g[1],t)}return e&&e.value()}renderBounds(t){const e=null==t?t=new i:void 0;return t.rect(this.xmin,this.ymin,this.xmax-this.xmin,this.ymax-this.ymin),e&&e.value()}renderCell(t,e){const n=null==e?e=new i:void 0,s=this._clip(t);if(null===s||!s.length)return;e.moveTo(s[0],s[1]);let l=s.length;for(;s[0]===s[l-2]&&s[1]===s[l-1]&&l>1;)l-=2;for(let t=2;t<l;t+=2)s[t]===s[t-2]&&s[t+1]===s[t-1]||e.lineTo(s[t],s[t+1]);return e.closePath(),n&&n.value()}*cellPolygons(){const{delaunay:{points:t}}=this;for(let e=0,i=t.length/2;e<i;++e){const t=this.cellPolygon(e);t&&(t.index=e,yield t)}}cellPolygon(t){const e=new n;return this.renderCell(t,e),e.value()}_renderSegment(t,e,i,n,s){let l;const h=this._regioncode(t,e),r=this._regioncode(i,n);0===h&&0===r?(s.moveTo(t,e),s.lineTo(i,n)):(l=this._clipSegment(t,e,i,n,h,r))&&(s.moveTo(l[0],l[1]),s.lineTo(l[2],l[3]))}contains(t,e,i){return(e=+e)==e&&(i=+i)==i&&this.delaunay._step(t,e,i)===t}*neighbors(t){const e=this._clip(t);if(e)for(const i of this.delaunay.neighbors(t)){const t=this._clip(i);if(t)t:for(let n=0,s=e.length;n<s;n+=2)for(let l=0,h=t.length;l<h;l+=2)if(e[n]===t[l]&&e[n+1]===t[l+1]&&e[(n+2)%s]===t[(l+h-2)%h]&&e[(n+3)%s]===t[(l+h-1)%h]){yield i;break t}}}_cell(t){const{circumcenters:e,delaunay:{inedges:i,halfedges:n,triangles:s}}=this,l=i[t];if(-1===l)return null;const h=[];let r=l;do{const i=Math.floor(r/3);if(h.push(e[2*i],e[2*i+1]),r=r%3==2?r-2:r+1,s[r]!==t)break;r=n[r]}while(r!==l&&-1!==r);return h}_clip(t){if(0===t&&1===this.delaunay.hull.length)return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];const e=this._cell(t);if(null===e)return null;const{vectors:i}=this,n=4*t;return this._simplify(i[n]||i[n+1]?this._clipInfinite(t,e,i[n],i[n+1],i[n+2],i[n+3]):this._clipFinite(t,e))}_clipFinite(t,e){const i=e.length;let n,s,l,h,r=null,o=e[i-2],a=e[i-1],c=this._regioncode(o,a),u=0;for(let g=0;g<i;g+=2)if(n=o,s=a,o=e[g],a=e[g+1],l=c,c=this._regioncode(o,a),0===l&&0===c)h=u,u=0,r?r.push(o,a):r=[o,a];else{let e,i,g,d,f;if(0===l){if(null===(e=this._clipSegment(n,s,o,a,l,c)))continue;[i,g,d,f]=e}else{if(null===(e=this._clipSegment(o,a,n,s,c,l)))continue;[d,f,i,g]=e,h=u,u=this._edgecode(i,g),h&&u&&this._edge(t,h,u,r,r.length),r?r.push(i,g):r=[i,g]}h=u,u=this._edgecode(d,f),h&&u&&this._edge(t,h,u,r,r.length),r?r.push(d,f):r=[d,f]}if(r)h=u,u=this._edgecode(r[0],r[1]),h&&u&&this._edge(t,h,u,r,r.length);else if(this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2))return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];return r}_clipSegment(t,e,i,n,s,l){const h=s<l;for(h&&([t,e,i,n,s,l]=[i,n,t,e,l,s]);;){if(0===s&&0===l)return h?[i,n,t,e]:[t,e,i,n];if(s&l)return null;let r,o,a=s||l;8&a?(r=t+(i-t)*(this.ymax-e)/(n-e),o=this.ymax):4&a?(r=t+(i-t)*(this.ymin-e)/(n-e),o=this.ymin):2&a?(o=e+(n-e)*(this.xmax-t)/(i-t),r=this.xmax):(o=e+(n-e)*(this.xmin-t)/(i-t),r=this.xmin),s?(t=r,e=o,s=this._regioncode(t,e)):(i=r,n=o,l=this._regioncode(i,n))}}_clipInfinite(t,e,i,n,s,l){let h,r=Array.from(e);if((h=this._project(r[0],r[1],i,n))&&r.unshift(h[0],h[1]),(h=this._project(r[r.length-2],r[r.length-1],s,l))&&r.push(h[0],h[1]),r=this._clipFinite(t,r))for(let e,i=0,n=r.length,s=this._edgecode(r[n-2],r[n-1]);i<n;i+=2)e=s,s=this._edgecode(r[i],r[i+1]),e&&s&&(i=this._edge(t,e,s,r,i),n=r.length);else this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2)&&(r=[this.xmin,this.ymin,this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax]);return r}_edge(t,e,i,n,s){for(;e!==i;){let i,l;switch(e){case 5:e=4;continue;case 4:e=6,i=this.xmax,l=this.ymin;break;case 6:e=2;continue;case 2:e=10,i=this.xmax,l=this.ymax;break;case 10:e=8;continue;case 8:e=9,i=this.xmin,l=this.ymax;break;case 9:e=1;continue;case 1:e=5,i=this.xmin,l=this.ymin}n[s]===i&&n[s+1]===l||!this.contains(t,i,l)||(n.splice(s,0,i,l),s+=2)}return s}_project(t,e,i,n){let s,l,h,r=1/0;if(n<0){if(e<=this.ymin)return null;(s=(this.ymin-e)/n)<r&&(h=this.ymin,l=t+(r=s)*i)}else if(n>0){if(e>=this.ymax)return null;(s=(this.ymax-e)/n)<r&&(h=this.ymax,l=t+(r=s)*i)}if(i>0){if(t>=this.xmax)return null;(s=(this.xmax-t)/i)<r&&(l=this.xmax,h=e+(r=s)*n)}else if(i<0){if(t<=this.xmin)return null;(s=(this.xmin-t)/i)<r&&(l=this.xmin,h=e+(r=s)*n)}return[l,h]}_edgecode(t,e){return(t===this.xmin?1:t===this.xmax?2:0)|(e===this.ymin?4:e===this.ymax?8:0)}_regioncode(t,e){return(t<this.xmin?1:t>this.xmax?2:0)|(e<this.ymin?4:e>this.ymax?8:0)}_simplify(t){if(t&&t.length>4){for(let e=0;e<t.length;e+=2){const i=(e+2)%t.length,n=(e+4)%t.length;(t[e]===t[i]&&t[i]===t[n]||t[e+1]===t[i+1]&&t[i+1]===t[n+1])&&(t.splice(i,2),e-=2)}t.length||(t=null)}return t}}const l=2*Math.PI,h=Math.pow;function r(t){return t[0]}function o(t){return t[1]}function a(t,e,i){return[t+Math.sin(t+e)*i,e+Math.cos(t-e)*i]}class c{static from(t,e=r,i=o,n){return new c("length"in t?function(t,e,i,n){const s=t.length,l=new Float64Array(2*s);for(let h=0;h<s;++h){const s=t[h];l[2*h]=e.call(n,s,h,t),l[2*h+1]=i.call(n,s,h,t)}return l}(t,e,i,n):Float64Array.from(function*(t,e,i,n){let s=0;for(const l of t)yield e.call(n,l,s,t),yield i.call(n,l,s,t),++s}(t,e,i,n)))}constructor(e){this._delaunator=new t(e),this.inedges=new Int32Array(e.length/2),this._hullIndex=new Int32Array(e.length/2),this.points=this._delaunator.coords,this._init()}update(){return this._delaunator.update(),this._init(),this}_init(){const e=this._delaunator,i=this.points;if(e.hull&&e.hull.length>2&&function(t){const{triangles:e,coords:i}=t;for(let t=0;t<e.length;t+=3){const n=2*e[t],s=2*e[t+1],l=2*e[t+2];if((i[l]-i[n])*(i[s+1]-i[n+1])-(i[s]-i[n])*(i[l+1]-i[n+1])>1e-10)return!1}return!0}(e)){this.collinear=Int32Array.from({length:i.length/2},((t,e)=>e)).sort(((t,e)=>i[2*t]-i[2*e]||i[2*t+1]-i[2*e+1]));const e=this.collinear[0],n=this.collinear[this.collinear.length-1],s=[i[2*e],i[2*e+1],i[2*n],i[2*n+1]],l=1e-8*Math.hypot(s[3]-s[1],s[2]-s[0]);for(let t=0,e=i.length/2;t<e;++t){const e=a(i[2*t],i[2*t+1],l);i[2*t]=e[0],i[2*t+1]=e[1]}this._delaunator=new t(i)}else delete this.collinear;const n=this.halfedges=this._delaunator.halfedges,s=this.hull=this._delaunator.hull,l=this.triangles=this._delaunator.triangles,h=this.inedges.fill(-1),r=this._hullIndex.fill(-1);for(let t=0,e=n.length;t<e;++t){const e=l[t%3==2?t-2:t+1];-1!==n[t]&&-1!==h[e]||(h[e]=t)}for(let t=0,e=s.length;t<e;++t)r[s[t]]=t;s.length<=2&&s.length>0&&(this.triangles=new Int32Array(3).fill(-1),this.halfedges=new Int32Array(3).fill(-1),this.triangles[0]=s[0],h[s[0]]=1,2===s.length&&(h[s[1]]=0,this.triangles[1]=s[1],this.triangles[2]=s[1]))}voronoi(t){return new s(this,t)}*neighbors(t){const{inedges:e,hull:i,_hullIndex:n,halfedges:s,triangles:l,collinear:h}=this;if(h){const e=h.indexOf(t);return e>0&&(yield h[e-1]),void(e<h.length-1&&(yield h[e+1]))}const r=e[t];if(-1===r)return;let o=r,a=-1;do{if(yield a=l[o],o=o%3==2?o-2:o+1,l[o]!==t)return;if(o=s[o],-1===o){const e=i[(n[t]+1)%i.length];return void(e!==a&&(yield e))}}while(o!==r)}find(t,e,i=0){if((t=+t)!=t||(e=+e)!=e)return-1;const n=i;let s;for(;(s=this._step(i,t,e))>=0&&s!==i&&s!==n;)i=s;return s}_step(t,e,i){const{inedges:n,hull:s,_hullIndex:l,halfedges:r,triangles:o,points:a}=this;if(-1===n[t]||!a.length)return(t+1)%(a.length>>1);let c=t,u=h(e-a[2*t],2)+h(i-a[2*t+1],2);const g=n[t];let d=g;do{let n=o[d];const g=h(e-a[2*n],2)+h(i-a[2*n+1],2);if(g<u&&(u=g,c=n),d=d%3==2?d-2:d+1,o[d]!==t)break;if(d=r[d],-1===d){if(d=s[(l[t]+1)%s.length],d!==n&&h(e-a[2*d],2)+h(i-a[2*d+1],2)<u)return d;break}}while(d!==g);return c}render(t){const e=null==t?t=new i:void 0,{points:n,halfedges:s,triangles:l}=this;for(let e=0,i=s.length;e<i;++e){const i=s[e];if(i<e)continue;const h=2*l[e],r=2*l[i];t.moveTo(n[h],n[h+1]),t.lineTo(n[r],n[r+1])}return this.renderHull(t),e&&e.value()}renderPoints(t,e){void 0!==e||t&&"function"==typeof t.moveTo||(e=t,t=null),e=null==e?2:+e;const n=null==t?t=new i:void 0,{points:s}=this;for(let i=0,n=s.length;i<n;i+=2){const n=s[i],h=s[i+1];t.moveTo(n+e,h),t.arc(n,h,e,0,l)}return n&&n.value()}renderHull(t){const e=null==t?t=new i:void 0,{hull:n,points:s}=this,l=2*n[0],h=n.length;t.moveTo(s[l],s[l+1]);for(let e=1;e<h;++e){const i=2*n[e];t.lineTo(s[i],s[i+1])}return t.closePath(),e&&e.value()}hullPolygon(){const t=new n;return this.renderHull(t),t.value()}renderTriangle(t,e){const n=null==e?e=new i:void 0,{points:s,triangles:l}=this,h=2*l[t*=3],r=2*l[t+1],o=2*l[t+2];return e.moveTo(s[h],s[h+1]),e.lineTo(s[r],s[r+1]),e.lineTo(s[o],s[o+1]),e.closePath(),n&&n.value()}*trianglePolygons(){const{triangles:t}=this;for(let e=0,i=t.length/3;e<i;++e)yield this.trianglePolygon(e)}trianglePolygon(t){const e=new n;return this.renderTriangle(t,e),e.value()}}export{c as Delaunay,s as Voronoi};export default null; | |