function c(r){r.computeBoundingBox();const t=r.boundingBox?.min,e=r.boundingBox?.max;return!t||!e?{min:[0,0,0],max:[0,0,0]}:{min:[t.x,t.y,t.z],max:[e.x,e.y,e.z]}}const l=Math.PI/4;function f(r,t){const e=r.clone();e.deleteAttribute?.("normal");const o=typeof t=="function"?t(e,l):e;return o!==e&&e.dispose?.(),o.getAttribute("normal")||o.computeVertexNormals?.(),o}function u(r,t){const e=r.getIndex?.();if(e?.count>0)return new Uint32Array(e.array);const o=new Uint32Array(t);for(let n=0;n<t;n+=1)o[n]=n;return o}function d(r,{toCreasedNormals:t}={}){const e=f(r,t),o=r.getAttribute("position"),n=e.getAttribute("position"),s=e.getAttribute("normal");try{if(!o||o.itemSize!==3||!n||n.itemSize!==3)throw new Error("STL geometry is missing vertex positions");const a=n.count;return{vertices:new Float32Array(n.array),indices:u(e,a),normals:s?.itemSize===3?new Float32Array(s.array):new Float32Array(n.array.length),colors:new Float32Array(0),edge_indices:new Uint32Array(0),bounds:c(r),parts:[],has_source_colors:!1,sourceColor:"",sourceFormat:"stl"}}finally{e.dispose?.()}}async function y(r){const[{STLLoader:t},{toCreasedNormals:e}]=await Promise.all([import("./STLLoader-C7hGonJR.js"),import("./BufferGeometryUtils-xu92ooFc.js")]),n=new t().parse(r);try{return d(n,{toCreasedNormals:e})}finally{n.dispose?.()}}function m(r){const t=[r?.vertices?.buffer,r?.indices?.buffer,r?.normals?.buffer,r?.colors?.buffer,r?.edge_indices?.buffer,r?.surfaceEdgeBarycentric?.buffer,r?.surfaceEdgeClass?.buffer,r?.guide_line_segments?.buffer].filter(e=>e instanceof ArrayBuffer&&e.byteLength>0);return[...new Set(t)]}const i=new Map;function b(r,t){return new Error(`Failed to fetch ${r}: ${t.status} ${t.statusText}`)}async function g(r,t){const e=await fetch(r,{signal:t});if(!e.ok)throw b(r,e);return e.arrayBuffer()}self.addEventListener("message",async r=>{const t=r.data||{},e=t.id;if(!e)return;if(t.type==="cancel"){i.get(e)?.abort(),i.delete(e);return}if(t.type!=="loadStl")return;const o=new AbortController;i.set(e,o);try{const n=await g(t.url,o.signal),s=await y(n);if(o.signal.aborted)return;self.postMessage({id:e,ok:!0,meshData:s},m(s))}catch(n){o.signal.aborted||self.postMessage({id:e,ok:!1,error:{name:n?.name||"Error",message:n instanceof Error?n.message:String(n)}})}finally{i.delete(e)}});
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