gltf-loader-ts/lib/gltf-loader.js

Engine-agnostic glTF 2.0 loader in TypeScript

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s.FileLoader(r),this.loader.responseType="arraybuffer"}get(e){return i(this,void 0,void 0,function*(){if(void 0!==this.bufferCache[e])return this.bufferCache[e];const t=this.asset.gltf;if(!t.buffers)throw new Error("No buffers found.");const r=t.buffers[e];if(void 0===r.uri){if(0!==e)throw new Error("GLB container is required to be the first buffer");if(void 0===this.asset.glbData)throw new Error("invalid gltf: buffer has no uri nor is there a GLB buffer");return this.asset.glbData.binaryChunk}const i=u(r.uri,this.baseUri),s=yield this.loader.load(i),n=new Uint8Array(s);return this.bufferCache[e]=n,n})}preFetchAll(){return i(this,void 0,void 0,function*(){const e=this.asset.gltf.buffers;return e?Promise.all(e.map((e,t)=>this.get(t))):[]})}}t.BufferData=o;class a{constructor(e,t,r){this.crossOrigin="anonymous",this.imageCache=[],this.asset=e,this.baseUri=t,this.manager=r}get(e){return i(this,void 0,void 0,function*(){if(void 0!==this.imageCache[e])return this.imageCache[e];const t=this.asset.gltf;if(!t.images)throw new Error("No images found.");const r=t.images[e];let i,s=!1;if(void 0!==r.bufferView){const e=yield this.asset.bufferViewData(r.bufferView);s=!0;const t=new Blob([e],{type:r.mimeType});i=URL.createObjectURL(t)}else{if(void 0===r.uri)throw new Error("Invalid glTF: image must either have a `uri` or a `bufferView`");i=this.manager.resolveURL(u(r.uri,this.baseUri))}const n=new Image;return n.crossOrigin=this.crossOrigin,new Promise((t,r)=>{n.onerror=(()=>{r(`Failed to load ${i}`),this.manager.itemEnd(i),this.manager.itemError(i)}),n.onload=(()=>{s&&URL.revokeObjectURL(i),this.imageCache[e]=n,t(n),this.manager.itemEnd(i)}),n.src=i,this.manager.itemStart(i)})})}preFetchAll(){return i(this,void 0,void 0,function*(){const e=this.asset.gltf.images;return e?Promise.all(e.map((e,t)=>this.get(t))):[]})}}function u(e,t){return"string"!=typeof 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o=yield this.load(i);return yield o.preFetchAll(),URL.revokeObjectURL(i),n.forEach(URL.revokeObjectURL),o})}parse(e,t){return i(this,void 0,void 0,function*(){let r,i=void 0;r="string"==typeof e?e:u.LoaderUtils.decodeText(new Uint8Array(e,0,4))===o.BINARY_HEADER_MAGIC?(i=new o.GLTFBinaryData(e)).json:u.LoaderUtils.decodeText(new Uint8Array(e));const s=JSON.parse(r);if(void 0===s.asset||s.asset.version[0]<2)throw new Error("Unsupported asset. glTF versions >=2.0 are supported.");return new a.GltfAsset(s,t,i,this.manager)})}}},function(e,t,r){e.exports=r(6)}]);
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