@maptalks/gl/dist/maptalksgl.js

WebGL infrastrcture for maptalks

/*!
 * @maptalks/gl v0.118.1
 * LICENSE : UNLICENSED
 * (c) 2016-2025 maptalks.com
 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('maptalks')) :
    typeof define === 'function' && define.amd ? define(['exports', 'maptalks'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.maptalks = global.maptalks || {}, global.maptalks));
})(this, (function (exports, e$2) { 'use strict';

    function _interopNamespaceDefault(e) {
        var n = Object.create(null);
        if (e) {
            Object.keys(e).forEach(function (k) {
                if (k !== 'default') {
                    var d = Object.getOwnPropertyDescriptor(e, k);
                    Object.defineProperty(n, k, d.get ? d : {
                        enumerable: true,
                        get: function () { return e[k]; }
                    });
                }
            });
        }
        n.default = e;
        return Object.freeze(n);
    }

    var e__namespace = /*#__PURE__*/_interopNamespaceDefault(e$2);

    const getGlobal = function () {
        if (typeof globalThis !== 'undefined') { return globalThis; }
        if (typeof self !== 'undefined') { return self; }
        if (typeof window !== 'undefined') { return window; }
        if (typeof global !== 'undefined') { return global; }
        throw new Error('unable to locate global object');
    };

    const globals = getGlobal();

    const transcoders = globals['gl_trans__coders'] = globals['gl_trans__coders'] || {};


    function inject(chunk) {
        // 奇怪的变量名是为了避免与worker源代码中的变量名冲突
        const fnString = chunk.toString();
        const prefixIndex = fnString.indexOf('{') + 1;
        const prefix = fnString.substring(0, prefixIndex);

        const transcoders = globals['gl_trans__coders'] = globals['gl_trans__coders'] || {};
        let injected = `${prefix}
    const _____getGlobal = ${getGlobal.toString()};
    const g___lobals = _____getGlobal()
    const tran_____scoders = g___lobals['gl_trans__coders'] = g___lobals['gl_trans__coders'] || {};`;
        for (const p in transcoders) {
            if (p === 'inject' || p === 'getTranscoder' || p === 'registerTranscoder') {
                continue;
            }
            injected += 'tran_____scoders["' + p + '"] =' + transcoders[p].toString() + '\n;';
        }
        const gltfBundle = getGlobal()['maptalks_gltf_loader_bundle'];
        injected += '\n(' + gltfBundle.toString() + ')({});\n';
        injected += '\n' + fnString.substring(prefix.length);
        return injected;
    }
    transcoders['inject'] = inject;

    function getTranscoder(name/*, options*/) {
        return transcoders[name];
    }

    function registerTranscoder(name, fn) {
        transcoders[name] = fn;
    }

    function registerGLTFLoaderBundle(fn) {
        getGlobal()['maptalks_gltf_loader_bundle'] = fn;
    }

    transcoders.registerTranscoder = registerTranscoder;
    transcoders.getTranscoder = getTranscoder;

    function gltfLoaderExport(e){var t=function(){return "undefined"!=typeof globalThis?globalThis:"undefined"!=typeof self?self:"undefined"!=typeof window?window:"undefined"!=typeof global?global:void 0};if(t().maptalks_gltf_loader)return;
    /*!
    	 * @maptalks/gltf-loader v0.118.1
    	 * LICENSE : UNLICENSED
    	 * (c) 2016-2025 maptalks.org
    	 */var s="undefined"!=typeof Float32Array?Float32Array:Array;function r(e,t,s){var r=t[0],n=t[1],i=t[2],a=t[3],o=t[4],f=t[5],u=t[6],h=t[7],c=t[8],l=t[9],d=t[10],m=t[11],g=t[12],p=t[13],b=t[14],_=t[15],y=s[0],x=s[1],w=s[2],T=s[3];return e[0]=y*r+x*o+w*c+T*g,e[1]=y*n+x*f+w*l+T*p,e[2]=y*i+x*u+w*d+T*b,e[3]=y*a+x*h+w*m+T*_,y=s[4],x=s[5],w=s[6],T=s[7],e[4]=y*r+x*o+w*c+T*g,e[5]=y*n+x*f+w*l+T*p,e[6]=y*i+x*u+w*d+T*b,e[7]=y*a+x*h+w*m+T*_,y=s[8],x=s[9],w=s[10],T=s[11],e[8]=y*r+x*o+w*c+T*g,e[9]=y*n+x*f+w*l+T*p,e[10]=y*i+x*u+w*d+T*b,e[11]=y*a+x*h+w*m+T*_,y=s[12],x=s[13],w=s[14],T=s[15],e[12]=y*r+x*o+w*c+T*g,e[13]=y*n+x*f+w*l+T*p,e[14]=y*i+x*u+w*d+T*b,e[15]=y*a+x*h+w*m+T*_,e}function n(){var e=new s(3);return s!=Float32Array&&(e[0]=0,e[1]=0,e[2]=0),e}function i(e,t,r){var n=new s(3);return n[0]=e,n[1]=t,n[2]=r,n}function a(e,t){return e[0]=t[0],e[1]=t[1],e[2]=t[2],e}function o(e,t,s,r){return e[0]=t,e[1]=s,e[2]=r,e}function f(e,t,s){return e[0]=t[0]+s[0],e[1]=t[1]+s[1],e[2]=t[2]+s[2],e}function 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a.xhr=r,a},_parseResponse:(e,t)=>200!==e.status?{status:e.status,statusText:e.statusText,message:`incorrect http request with status code(${e.status}): ${e.statusText}`}:"arraybuffer"===t?e.arrayBuffer():"json"===t?e.json():e.text(),getArrayBuffer:(e,t={},s)=>(t||(t={}),t.responseType="arraybuffer",P.get(e,t,s)),getJSON:function(e,t={},s){return t&&t.jsonp?P.jsonp(e):((t=t||{}).responseType="json",P.get(e,t,s))},jsonp:function(e){const t="_maptalks_jsonp_"+g++;e.match(/\?/)?e+="&callback="+t:e+="?callback="+t;let s=document.createElement("script");return s.type="text/javascript",s.src=e,new Promise((e=>{window[t]=function(r){document.getElementsByTagName("head")[0].removeChild(s),s=null,delete window[t],e(r);},document.getElementsByTagName("head")[0].appendChild(s);}))}};class M{constructor(e,t,s,r,n){this._requestImage=e,this.decoders=t,this._supportedFormats=s,this.images={},this._imgRequests={},this._fetchOptions=r||{},this._urlModifier=n;}requestImageFromBufferURI(e,t,s){if(this.buffers[e.id]){const r=this.buffers[e.id],n=this._createDataView(t,r);return this.getImageByBuffer(n,s)}if(this._imgRequests[e.id])return this._imgRequests[e.id].then((()=>{const r=this.buffers[e.id],n=this._createDataView(t,r);return this.getImageByBuffer(n,s)}));if(w(e.uri)){const r=this.buffers[e.id]=T(e.uri),n=this._createDataView(t,r);return this.getImageByBuffer(n,s)}let r;const n=e.uri.indexOf("blob:")>=0;return r=e.uri.indexOf("://")>0||n?e.uri:this.rootPath+"/"+e.uri,this._imgRequests[e.id]=P.getArrayBuffer(r,this._fetchOptions,this._urlModifier).then((r=>{const n=this.buffers[e.id]=r.data,i=this._createDataView(t,n);return this.getImageByBuffer(i,s)}))}getImageByBuffer(e,t){if(this.images[t.id])return Promise.resolve(this.images[t.id]);const s=this.decoders;if(s[t.mimeType])return s[t.mimeType](e,{supportedFormats:this._supportedFormats});if("image/crn"===t.mimeType||"image/ktx2"===t.mimeType||"image/cttf"===t.mimeType)throw new Error("missing transcoder for "+t.mimeType,"");return this._getImageInfo(t.id,e)}requestExternalImage(e){if(this.images[e.id])return Promise.resolve(this.images[e.id]);const t=0===e.uri.indexOf("data:image/")?e.uri:this.rootPath+"/"+e.uri;return this._imgRequests[e.id]?this._imgRequests[e.id].then((()=>this.images[e.id])):this._imgRequests[e.id]=this._getImageInfo(e.id,t)}_getImageInfo(e,t){return new Promise(((s,r)=>{let n=t;this._urlModifier&&(n=this._urlModifier(t)),this._requestImage(n,this._fetchOptions,((n,i)=>{n?r(n):(URL.revokeObjectURL(t),this.images[e]=i,s(this.images[e]));}));}))}}const S=["SCALAR",1,"VEC2",2,"VEC3",3,"VEC4",4,"MAT2",4,"MAT3",9,"MAT4",16],V=[];class L{constructor(e,t,s,r,n){this.rootPath=e,this.gltf=t,this._enableInterleave=!1,this.glbBuffer=s,this.buffers={},this.requests={},this.accessors={},this._compareAccessor(),this._fetchOptions=r,this._urlModifier=n;}_requestData(e,t){const s=this.gltf,r=s.accessors[t];if(void 0===r.bufferView)return this.accessors[r.id]=this._toBufferData(e,t,null,0),Promise.resolve(this.accessors[r.id]);if(r&&this.accessors[r.id])return Promise.resolve(this.accessors[r.id]);const n=s.bufferViews[r.bufferView];return this._requestBufferOfBufferView(n).then((s=>{const{buffer:n,byteOffset:i}=s;return this.accessors[r.id]=this._toBufferData(e,t,n,i)}))}_requestBufferOfBufferView(e){const t=this.gltf.buffers[e.buffer];if(this.buffers[t.id]){const e=this.buffers[t.id];return Promise.resolve({buffer:e,byteOffset:0})}if(this.requests[t.id])return this.requests[t.id].then((()=>{const e=this.buffers[t.id];return Promise.resolve({buffer:e,byteOffset:0})}));if("binary_glTF"!==e.buffer&&"KHR_binary_glTF"!==e.buffer&&t.uri){if(w(t.uri)){const e=this.buffers[t.id]=T(t.uri);return Promise.resolve({buffer:e,byteOffset:0})}let e;const s=t.uri.indexOf("blob:")>=0;return e=t.uri.indexOf("://")>0||s?t.uri:this.rootPath+"/"+t.uri,this.requests[t.id]=P.getArrayBuffer(e,this._fetchOptions,!s&&this._urlModifier).then((r=>(s&&URL.revokeObjectURL(e),{buffer:this.buffers[t.id]=r.data,byteOffset:0})))}return Promise.resolve({buffer:this.glbBuffer.buffer,byteOffset:this.glbBuffer.byteOffset})}_toBufferData(e,t,s,r=0){const n=this.gltf,i=n.accessors[t],a=void 0!==i.bufferView?n.bufferViews[i.bufferView]:{},o=(a.byteOffset||0)+r,f=this._getTypeItemSize(i.type),u=x(i.componentType),h=a.byteStride||0,l={array:void 0,name:e,accessorName:t,byteLength:i.count*f*u.BYTES_PER_ELEMENT,componentType:i.componentType,count:i.count,type:i.type,itemSize:f,max:i.max,min:i.min,extensions:i.extensions};if(i.min&&(l.min=i.min),i.max&&(l.max=i.max),s)if(this._enableInterleave)l.byteStride=h,l.byteOffset=o+(i.byteOffset||0),!h||h===f*u.BYTES_PER_ELEMENT||"indices"===e||"input"===e||"output"===e||e.indexOf("morph")>=0?(l.array=this._typedArray(s,i.count,f,o+(i.byteOffset||0),u),l.array.buffer.byteLength===l.byteLength&&(l.byteOffset=0)):l.array=new Uint8Array(s,o,a.byteLength);else if(i.interleaved){l.byteStride=0,l.byteOffset=0;const e=new u(i.count*f);if(l.array=B(e,s,i.count,f,h,o+(i.byteOffset||0),i.componentType),l.extensions&&l.extensions.WEB3D_quantized_attributes&&f>2){const e=new Float32Array(l.array.length),{decodeMatrix:t}=l.extensions.WEB3D_quantized_attributes;for(let s=0;s<l.array.length;s+=f){V[0]=l.array[s],V[1]=l.array[s+1],V[2]=l.array[s+2],V[3]=1;const r=c(V,V,t);e[s]=r[0],e[s+1]=r[1],e[s+2]=r[2];}l.componentType=5126,l.array=e;}}else l.byteStride=0,l.array=this._typedArray(s,i.count,f,o+(i.byteOffset||0),u),l.byteOffset=l.array.byteOffset;else {l.array=new u(i.count);const e=l.min||l.max;e&&(l.array[0]=e[0],l.array[1]=e[1],l.array[2]=e[2]);}return l}_compareAccessor(){const e=this.gltf.accessors;if(Array.isArray(e))for(let t=0;t<e.length;t++)for(let s=0;s<e.length;s++)t!==s&&e[t].bufferView===e[s].bufferView&&(e[t].interleaved=e[s].interleaved=!0);else for(const t in e)for(const s in e)t!==s&&e[t].bufferView===e[s].bufferView&&(e[t].interleaved=e[s].interleaved=!0);}_typedArray(e,t,s,r,n){return r%n.BYTES_PER_ELEMENT!=0&&(e=e.slice(r,r+t*s*n.BYTES_PER_ELEMENT),r=0),new n(e,r,s*t)}_getTypeItemSize(e){const t=S.indexOf(e);return S[t+1]}requestKHRTechniquesWebgl(e){const{shaders:t}=e,s=t.map((e=>{if(void 0!==e.bufferView){const t=this.gltf.bufferViews[e.bufferView],{byteLength:s}=t;return this._requestBufferOfBufferView(t).then((r=>{const{buffer:n,byteOffset:i}=r,a=v(n,i+(t.byteOffset||0),s);return e.content=a,e}))}if(e.uri){if(w(e.uri)){const t=T(e.uri),s=v(t,0,t.byteLength);return e.content=s,Promise.resolve(e)}{const t=this.rootPath+"/"+e.uri;return P.get(t,this._fetchOptions,this._urlModifier).then((t=>(e.content=t,e)))}}return Promise.resolve(e)}));return Promise.all(s).then((()=>e))}}class D extends M{constructor(e,t,s,r,n,i,a,o){super(r,n,i,a,o),this.rootPath=e,this.gltf=t,this.requests={},this.buffers={},this.glbBuffer=s,this.accessor=new L(e,t,s,a,o);}iterate(e,t){const s=this.gltf[t];if(!s)return;let r=0;for(const t in s)e(t,s[t],r++);}createNode(e){const t={};if(b(e.name)&&(t.name=e.name),b(e.children)&&(t.children=e.children),b(e.jointName)&&(t.jointName=e.jointName),b(e.matrix)&&(t.matrix=e.matrix),b(e.rotation)&&(t.rotation=e.rotation),b(e.scale)&&(t.scale=e.scale),b(e.translation)&&(t.translation=e.translation),b(e.extras)&&(t.extras=e.extras),b(e.meshes)&&(t.mesh=e.meshes[0]),t.translation||t.rotation||t.scale){const e=function(e,t){if(t.matrix)return t.matrix;if(t.translation||t.scale||t.rotation){const s=function(e,t){return e[0]=1,e[1]=0,e[2]=0,e[3]=0,e[4]=0,e[5]=1,e[6]=0,e[7]=0,e[8]=0,e[9]=0,e[10]=1,e[11]=0,e[12]=t[0],e[13]=t[1],e[14]=t[2],e[15]=1,e}(E,t.translation||R),n=function(e,t){var s=t[0],r=t[1],n=t[2],i=t[3],a=s+s,o=r+r,f=n+n,u=s*a,h=r*a,c=r*o,l=n*a,d=n*o,m=n*f,g=i*a,p=i*o,b=i*f;return e[0]=1-c-m,e[1]=h+b,e[2]=l-p,e[3]=0,e[4]=h-b,e[5]=1-u-m,e[6]=d+g,e[7]=0,e[8]=l+p,e[9]=d-g,e[10]=1-u-c,e[11]=0,e[12]=0,e[13]=0,e[14]=0,e[15]=1,e}(O,t.rotation||A),i=function(e,t){return e[0]=t[0],e[1]=0,e[2]=0,e[3]=0,e[4]=0,e[5]=t[1],e[6]=0,e[7]=0,e[8]=0,e[9]=0,e[10]=t[2],e[11]=0,e[12]=0,e[13]=0,e[14]=0,e[15]=1,e}(I,t.scale||q);return r(i,n,i),r(e,s,i)}return function(e){return e[0]=1,e[1]=0,e[2]=0,e[3]=0,e[4]=0,e[5]=1,e[6]=0,e[7]=0,e[8]=0,e[9]=0,e[10]=1,e[11]=0,e[12]=0,e[13]=0,e[14]=0,e[15]=1,e}(e)}([],t);delete t.translation,delete t.rotation,delete t.scale,t.matrix=e;}return t}_loadMaterials(e){const t={};for(const s in e){const r=e[s];let n,i;r.instanceTechnique&&r.instanceTechnique.values?(n=r.instanceTechnique,i=n.values.diffuse):(n=r,i=n.values.tex||n.values.diffuseTex||n.values.diffuse);const a={baseColorTexture:{index:i}};r.name&&(a.name=r.name),r.extensions&&(a.extensions=r.extensions),r.extras&&(a.extras=r.extras),t[s]=a;}return t}_loadImage(e){if(e.bufferView||e.extensions&&(e.extensions.KHR_binary_glTF||e.extensions.binary_glTF)){const t=e.bufferView?e:e.extensions.KHR_binary_glTF||e.extensions.binary_glTF;e.extensions&&(e.mimeType=t.mimeType,e.width=t.width,e.height=t.height);const s=this.gltf.bufferViews[t.bufferView],r=(s.byteOffset||0)+this.glbBuffer.byteOffset,n=s.byteLength,i=this.buffers[t.bufferView]=new Uint8Array(this.glbBuffer.buffer,r,n);return this.getImageByBuffer(i,e)}return this.requestExternalImage(e)}_getTexture(e){const t=this.gltf.textures[e];if(!t)return null;const s=this.gltf.images[t.source];return this._loadImage(s).then((e=>{const r=this.gltf.samplers[t.sampler];return {image:{array:e.data,width:e.width,height:e.height,index:t.source,mimeType:s.mimeType,name:s.name,extras:s.extras},sampler:r}}))}getBaseColorTexture(e){const t=this.gltf.materials[e];let s,r;if(t.instanceTechnique&&t.instanceTechnique.values?(s=t.instanceTechnique,r=s.values.diffuse):(s=t,r=s.values.tex||s.values.diffuseTex||s.values.diffuse),void 0===r||void 0===this.gltf.textures)return null;const n=this.gltf.textures[r];if(!n)return null;const i=this.gltf.samplers[n.sampler];return {format:n.format||6408,internalFormat:n.internalFormat||6408,type:n.type||5121,sampler:i,source:this.gltf.images[n.source]}}getMaterial(){return null}getAnimations(){return null}}const U=9729;class C extends M{constructor(e,t,s,r,n,i,a,o){super(r,n,i,a,o),this.rootPath=e,this.gltf=t,this.glbBuffer=s,this.buffers={},this.requests={},this.accessor=new L(e,t,s,a,o);}iterate(e,t){const s=this.gltf[t];if(s)for(let t=0;t<s.length;t++)e(t,s[t],t);}createNode(e){const t={};return y(t,e),!b(e.weights)&&this.gltf.meshes&&b(t.mesh)?t.weights=this.gltf.meshes[t.mesh].weights:e.weights&&(t.weights=e.weights),t}_getTexture(e){const t=this.gltf.textures[e];if(!t)return null;let s=t.source;if(t.extensions&&t.extensions.EXT_texture_webp?s=t.extensions.EXT_texture_webp.source:t.extensions&&t.extensions.KHR_texture_basisu&&(s=t.extensions.KHR_texture_basisu.source),!b(s))return null;const r=this.gltf.images[s];return this._loadImage(r).then((e=>{if(!e)return null;const s={image:{array:e.data,mipmap:e.mipmap,width:e.width,height:e.height,index:t.source,mimeType:r.mimeType,name:r.name,extensions:r.extensions,extras:r.extras}};y(s,t);const n=b(t.sampler)?this.gltf.samplers[t.sampler]:void 0;if(n&&(s.sampler=n,s.sampler.magFilter=n.magFilter||U,s.sampler.minFilter=n.minFilter||9987,s.sampler.wrapS=n.wrapS||10497,s.sampler.wrapT=n.wrapT||10497),"image/ktx2"===s.image.mimeType&&!s.image.mipmap&&s.sampler&&s.sampler.minFilter!==U&&9728!==s.sampler.minFilter){const e=s.sampler.minFilter;s.sampler.minFilter=9984===e||9986===e?9728:U;}if(e.format&&(s.format=e.format),6407===s.format){const e=s.image.array&&s.image.array.length;e&&e===s.image.width*s.image.height*4&&(s.format=6408);}return s}))}_loadImage(e){if(!b(e.bufferView))return this.requestExternalImage(e);{const t=this.gltf.bufferViews[e.bufferView],s=this.gltf.buffers[t.buffer];if(s.uri)return this.requestImageFromBufferURI(s,t,e);if(this.glbBuffer)return this._requestFromGlbBuffer(t,e)}return null}_requestFromGlbBuffer(e,t){const s=this._createDataView(e,this.glbBuffer.buffer,this.glbBuffer.byteOffset);return this.getImageByBuffer(s,t)}_createDataView(e,t,s){s=s||0;const r=(e.byteOffset||0)+s,n=e.byteLength;return new Uint8Array(t,r,n)}_transformArrayBufferToBase64(e,t){const s=new Array(e.byteLength);for(let t=0;t<e.byteLength;t++)s[t]=String.fromCharCode(e[t]);s.join("");const r="data:"+(t=t||"image/png")+";base64,"+function(e){return "undefined"!=typeof self?self.btoa(e):window.btoa(e)}(unescape(encodeURIComponent(s)));return r}getAnimations(e){const t=[];return e.forEach((e=>{t.push(this.getSamplers(e.samplers));})),Promise.all(t).then((t=>{for(let s=0;s<t.length;s++)e[s].samplers=t[s];return e}))}getSamplers(e){const t=[];for(let s=0;s<e.length;s++)(b(e[s].input)||b(e[s].output))&&(t.push(this.accessor._requestData("input",e[s].input)),t.push(this.accessor._requestData("output",e[s].output)));return Promise.all(t).then((t=>{for(let s=0;s<t.length/2;s++)e[s].input=t[2*s],e[s].output=t[2*s+1],e[s].interpolation||(e[s].interpolation="LINEAR");return e}))}}const F="undefined"!=typeof TextDecoder?new TextDecoder("utf-8"):null;class k{static read(e,t=0,s=0){s||(s=e.byteLength);const r=new DataView(e,t,s),n=r.getUint32(4,!0);if(1===n)return k.readV1(r,t);if(2===n)return k.readV2(e,t);throw new Error("Unsupported glb version : "+n)}static readV1(e,t){const s=e.getUint32(8,!0),r=e.getUint32(12,!0);if(s!==e.byteLength)throw new Error("Length in GLB header is inconsistent with glb's byte length.");const n=X(e.buffer,20+t,r);return {json:JSON.parse(n),glbBuffer:{byteOffset:20+t+r,buffer:e.buffer,byteLength:s}}}static readV2(e,t){let s,r,n;const i=new DataView(e,t+12);let a=0;for(;a+8<i.byteLength;){const o=i.getUint32(a,!0);a+=4;const f=i.getUint32(a,!0);if(a+=4,1313821514===f)s=X(e,t+12+a,o);else if(5130562===f){n=t+12+a,r=o;break}a+=o;}return {json:JSON.parse(s),glbBuffer:{byteOffset:n,buffer:e,byteLength:r}}}}function X(e,t,s){if(F){const r=new Uint8Array(e,t,s);return F.decode(r)}return function(e){const t=e.length;let s="";for(let r=0;r<t;){let n=e[r++];if(128&n){let s=K[n>>3&7];if(!(64&n)||!s||r+s>t)return null;for(n&=63>>s;s>0;s-=1){const t=e[r++];if(128!=(192&t))return null;n=n<<6|63&t;}}s+=String.fromCharCode(n);}return s}(new Uint8Array(e,t,s))}const K=[1,1,1,1,2,2,3,0],H=[0,0,0],j=[0,0,0,1],z=[1,1,1],W={TRANSLATION:[0,0,0],ROTATION:[0,0,0,1],SCALE:[1,1,1]},G={PREVIOUS:null,NEXT:null,PREINDEX:null,NEXTINDEX:null,INTERPOLATION:null},Y={_getTRSW(e,t,s,r,n,i,o,f){const u=b(e)?t.animations:[t.animations[0]],h={};for(let t=0;t<u.length;t++){const c=u[t],l=c.name||t;if(b(e)&&l!==e)continue;const d=c.channelsMap[s];if(d)for(let e=0;e<d.length;e++){const t=d[e];"translation"===t.target.path?(this._getAnimateData(n,c.samplers[t.sampler],r,1),h.translation=a(H,n)):"rotation"===t.target.path?(this._getQuaternion(i,c.samplers[t.sampler],r,1),h.rotation=m(j,i)):"scale"===t.target.path?(this._getAnimateData(o,c.samplers[t.sampler],r,1),h.scale=a(z,o)):"weights"===t.target.path&&f&&(this._getAnimateData(f,c.samplers[t.sampler],r,f.length),h.weights=f);}}return h},_getAnimateData(e,t,s,r){switch(t.interpolation){case"LINEAR":{const n=this._getPreNext(G,t,s,1*r);n&&(e=function(e,t,s,r){for(let n=0;n<e.length;n++)e[n]=t[n]+r*(s[n]-t[n]);return e}(e,n.PREVIOUS,n.NEXT,n.INTERPOLATION));break}case"STEP":{const n=this._getPreNext(G,t,s,1*r);n&&(e=function(e,t){for(let s=0;s<e.length;s++)e[s]=t[s];return e}(e,...n.PREVIOUS));break}case"CUBICSPLINE":{const n=this._getPreNext(G,t,s,3*r);n&&(e=this._getCubicSpline(e,n,t.input.array,3*r));break}}return e},_getQuaternion(e,t,s){switch(t.interpolation){case"LINEAR":{const r=this._getPreNext(G,t,s,1);r&&function(e,t,s,r){var n,i,a,o,f,u=t[0],h=t[1],c=t[2],l=t[3],d=s[0],m=s[1],g=s[2],p=s[3];(i=u*d+h*m+c*g+l*p)<0&&(i=-i,d=-d,m=-m,g=-g,p=-p),1-i>1e-6?(n=Math.acos(i),a=Math.sin(n),o=Math.sin((1-r)*n)/a,f=Math.sin(r*n)/a):(o=1-r,f=r),e[0]=o*u+f*d,e[1]=o*h+f*m,e[2]=o*c+f*g,e[3]=o*l+f*p;}(e,r.PREVIOUS,r.NEXT,r.INTERPOLATION);break}case"STEP":{const r=this._getPreNext(G,t,s,1);r&&(e=h(e,...r.PREVIOUS));break}case"CUBICSPLINE":{const r=this._getPreNext(G,t,s,3);if(r){for(let e=0;e<r.PREVIOUS.length;e++)r.PREVIOUS[e]=Math.acos(r.PREVIOUS[e]),r.NEXT[e]=Math.acos(r.NEXT[e]);e=this._getCubicSpline(e,r,t.input.array,3);for(let t=0;t<e.length;t++)e[t]=Math.cos(e[t]);}break}}return e},_search(e,t){const s=e.length;let r,n,i,a=0,o=s-1,f=Math.floor((a+o)/2);for(;a<=s-1&&o>=0;){if(a===o)return null;if(e[f]<=t&&t<=e[f+1]){const s=e[f];return r=f,n=f+1,i=(t-s)/(e[f+1]-s),{preIndx:r,nextIndex:n,interpolation:i}}t<e[f]?(o=f,f=Math.floor((a+o)/2)):e[f+1]<t&&(a=f,f=Math.floor((a+o)/2));}return null},_getPreNext(e,t,s,r){const n=t.input.array,i=t.output.array,a=t.output.itemSize;(s<n[0]||s>n[n.length-1])&&(s=Math.max(n[0],Math.min(n[n.length-1],s))),s===n[n.length-1]&&(s=n[0]);const o=this._search(n,s);if(!o||!o.nextIndex)return null;const{preIndx:f,nextIndex:u,interpolation:h}=o;e.PREINDEX=f,e.NEXTINDEX=u,e.INTERPOLATION=h;const c=a*r;return e.PREVIOUS=i.subarray(e.PREINDEX*c,(e.PREINDEX+1)*c),e.NEXT=i.subarray(e.NEXTINDEX*c,(e.NEXTINDEX+1)*c),e},_getCubicSpline(e,t,s,r){const n=t.INTERPOLATION,i=s[t.PREINDEX],a=s[t.NEXTINDEX];for(let s=0;s<3;s++){const o=t.PREVIOUS[r+s],f=(a-i)*t.PREVIOUS[2*r+s],u=t.NEXT[3+s],h=(a-i)*t.NEXT[s],c=(2*Math.pow(n,3)-3*Math.pow(n,2)+1)*o+(Math.pow(n,3)-2*Math.pow(n,2)+n)*f+(2*-Math.pow(n,3)+3*Math.pow(n,2))*u+(Math.pow(n,3)-Math.pow(n,2))*h;e[s]=c;}return e},getAnimationClip(e,t,s,r){const n=e.nodes[t]&&e.nodes[t].weights;return o(H,...W.TRANSLATION),h(j,...W.ROTATION),o(z,...W.SCALE),this._getTRSW(r,e,t,s,H,j,z,n)},getTimeSpan(e){if(!e.animations)return null;if(e.timeSpan)return e.timeSpan;const t=e.animations;return e.timeSpan={},t.forEach(((t,s)=>{let r=-1/0,n=1/0;const i=t.channels;for(let e=0;e<i.length;e++){const s=i[e],a=t.samplers[s.sampler].input.array;a[a.length-1]>r&&(r=a[a.length-1]),a[0]<n&&(n=a[0]);}const a=t.name||s;e.timeSpan[a]={max:r,min:n};})),e.timeSpan},getTimeSpanByName(e,t){const s=this.getTimeSpan(e);return s?b(t)?s[t]:s[Object.keys(s)[0]]:null}};let $=!1;if("undefined"!=typeof OffscreenCanvas){let e;try{e=new OffscreenCanvas(2,2).getContext("2d");}catch(s){}e&&"undefined"!=typeof createImageBitmap&&($=!0);}const J="undefined"==typeof document?null:document.createElement("canvas");function Q(e,t,s){const r=new Image;r.crossOrigin="",r.onload=()=>{if(!J)return void s(new Error("There is no canvas to draw image!"));J.width=r.width,J.height=r.height;const e=J.getContext("2d",{willReadFrequently:!0});e.drawImage(r,0,0,r.width,r.height);const t=e.getImageData(0,0,r.width,r.height),n={width:r.width,height:r.height,data:new Uint8Array(t.data)};s(null,n);},r.onerror=function(e){s(e);},r.src=e;}const Z=[],ee=[],te=30;let se,re;function ne(e,t,s){se||(se=new OffscreenCanvas(2,2),re=se.getContext("2d",{willReadFrequently:!0}));let r=null;if(_(e))this.options.urlModifier&&(e=this.options.urlModifier(e)),Z.push([e,t,s,this]),ie();else {const t=new Blob([e]);r=createImageBitmap(t),r.then(ae.bind(this)).then((e=>{s(null,e);})).catch((e=>{console.warn(e),s(e);}));}}function ie(){if(!Z.length||ee.length>te)return;const e=Z.shift(),[t,s,r,n]=e;ee.push(e),fetch(t,s).then((e=>e.arrayBuffer())).then((e=>{const t=new Blob([new Uint8Array(e)]);return createImageBitmap(t)})).then(ae.bind(n)).then((t=>{r.call(n,null,t);const s=ee.indexOf(e);ee.splice(s,1),ie();})).catch((t=>{console.warn(t),r.call(n,t);const s=ee.indexOf(e);ee.splice(s,1),ie();}));}function ae(e){let{width:t,height:s}=e;oe(t)||(t=fe(t)),oe(s)||(s=fe(s));const r=this.options.maxTextureSize;r&&(t=Math.min(r,t),s=Math.min(r,s)),se.width=t,se.height=s,re.drawImage(e,0,0,t,s),e.close();const n=re.getImageData(0,0,t,s);return {width:t,height:s,data:new Uint8Array(n.data)}}function oe(e){return !(e&e-1)&&0!==e}function fe(e){return Math.pow(2,Math.floor(Math.log(e)/Math.LN2))}function ue(e,t){for(const s in e)if(e[s]===t)return s;return t}e.Ajax=P,e.GLTFLoader=class{constructor(e,t,s){if(this.options=s||{},this.options.decoders||(this.options.decoders={}),this._fetchOptions=this.options.fetchOptions||{},t.buffer instanceof ArrayBuffer){const{json:s,glbBuffer:r}=k.read(t.buffer,t.byteOffset,t.byteLength);this._init(e,s,r);}else this._init(e,t);this._accessor=new L(this.rootPath,this.gltf,this.glbBuffer,this._fetchOptions,this.options.urlModifier),this._checkExtensions();}_checkExtensions(){const e=this.gltf.extensionsRequired;if(e){if(e.indexOf("KHR_draco_mesh_compression")>=0&&!this.options.decoders.draco)throw new Error("KHR_draco_mesh_compression is required but @maptalks/transcoders.draco is not loaded");if(e.indexOf("KHR_texture_basisu")>=0&&!this.options.decoders["image/ktx2"])throw new Error("KHR_texture_basisu is required but @maptalks/transcoders.ktx2 is not loaded");if(e.indexOf("EXT_meshopt_compression")>=0)throw new Error("EXT_meshopt_compression extension is not supported yet.")}}_loadExtensions(){const e=this.gltf.extensions;return e&&e.KHR_techniques_webgl?this._accessor.requestKHRTechniquesWebgl(e.KHR_techniques_webgl).then((t=>(e.KHR_techniques_webgl=t,e))):Promise.resolve(e)}_convertKhrTechiqueToTechiques(){if(!Array.isArray(this.gltf.programs))return;const e=this.gltf.materials;for(let t=0;t<e.length;t++)e[t]&&e[t].extensions&&e[t].extensions.KHR_technique_webgl&&(e[t].extensions.KHR_techniques_webgl=e[t].extensions.KHR_technique_webgl,delete e[t].extensions.KHR_technique_webgl);const t=this.gltf.extensions||{},s=this.gltf.techniques;t.KHR_techniques_webgl={programs:this.gltf.programs,shaders:this.gltf.shaders,techniques:s};for(let t=0;t<e.length;t++){const n=(r=e[t])&&r.extensions&&r.extensions.KHR_techniques_webgl;if(n){const{values:e,technique:t}=n,r=s[t];if(!r||!e)continue;const{uniforms:i,parameters:a}=r,o={};for(const t in e){const s=ue(i,t);o[s]=e[t],a[t]&&35678===a[t].type&&(o[s]={index:e[t]});}n.values=o;}}var r;for(let e=0;e<s.length;e++){const t=s[e];if(!t)continue;const{attributes:r,uniforms:n,parameters:i}=t;if(r)for(const e in r){const t=r[e];r[e]=i[t];}if(n)for(const e in n){const t=n[e];n[e]=i[t];}delete t.parameters;}return delete this.gltf.programs,delete this.gltf.shaders,delete this.gltf.techniques,this.gltf.extensions=t,t}load(e){e=e||{},this._convertKhrTechiqueToTechiques();const t=this._loadScene(e),s=this._loadAnimations(),r=this._loadTextures(),n=this._loadExtensions();return Promise.all([t,s,r,n]).then((e=>(e[0].animations=e[1],e[0].textures=e[2],e[0].extensions=e[3],e[0].transferables=this.transferables||[],this.createChannelsMap(e[0]),e[0])))}createChannelsMap(e){const t=e.animations;if(t)for(let e=0;e<t.length;e++){const s=t[e];s.channelsMap={};for(let e=0;e<s.channels.length;e++){const t=s.channels[e];s.channelsMap[t.target.node]||(s.channelsMap[t.target.node]=[]),s.channelsMap[t.target.node].push(t);}}}getExternalResources(){const e=[];if(this.gltf){const{buffers:t,images:s}=this.gltf;for(let s=0;s<t.length;s++)t[s].uri&&t[s].uri.indexOf("data:application/octet-stream;base64")<0&&e.push({type:"buffer",uri:t[s].uri});for(let t=0;t<s.length;t++)s[t].uri&&s[t].uri.indexOf("data:image/")<0&&e.push({type:"image",uri:s[t].uri});}return e}static getAnimationClip(e,t,s,r){return Y.getAnimationClip(e,t,s,r)}static getAnimationTimeSpan(e,t){return Y.getTimeSpanByName(e,t)}static getTypedArrayCtor(e){return x(e)}static readInterleavedArray(e,t,s,r,n,i,a){return B(e,t,s,r,n,i,a)}_init(e,t,s){this.gltf=t,this.glbBuffer=s,this.version=t.asset?+t.asset.version:1,this.rootPath=e,this.buffers={},this.requests={},this.options.requestImage=$?ne.bind(this):this.options.requestImage||Q,this.options.transferable&&(this.transferables=[]),2===this.version?(this.adapter=new C(e,t,s,this.options.requestImage,this.options.decoders||{},this.options.supportedFormats||{},this._fetchOptions,this.options.urlModifier),this.adapter.iterate(((e,t,s)=>{t.id="buffer_"+s;}),"buffers"),this.adapter.iterate(((e,t,s)=>{t.id="image_"+s;}),"images"),this.adapter.iterate(((e,t,s)=>{t.id="accessor_"+s;}),"accessors")):(this.adapter=new D(e,t,s,this.options.requestImage,this.options.decoders||{},this.options.supportedFormats||{},this._fetchOptions,this.options.urlModifier),this.adapter.iterate(((e,t,s)=>{t.id="accessor_"+s;}),"accessors"),this.adapter.iterate(((e,t,s)=>{t.id="image_"+s;}),"images"));}_parseNodes(e,t){if(e.children&&e.children.length>0){if(!("number"==typeof(s=e.children[0])&&isFinite(s)||_(e.children[0])))return e;const r=e.children.map((e=>{const s=t[e];return s.nodeIndex=e,this._parseNodes(s,t)}));e.children=r;}var s;return e}_loadScene(e){return this._loadNodes(e).then((e=>{const t=this.scenes=[];let s;for(const t in e)e[t]=this._parseNodes(e[t],e),e[t].nodeIndex=Number(t)?Number(t):t;this.adapter.iterate(((r,n,i)=>{const a={};n.name&&(a.name=n.name),n.nodes&&(a.nodes=n.nodes.map((t=>e[t]))),this.gltf.scene===r&&(s=i),t.push(a);}),"scenes");const 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