@maptalks/gl/dist/maptalksgl.es.js

WebGL infrastrcture for maptalks

/*!
 * @maptalks/gl v0.118.1
 * LICENSE : UNLICENSED
 * (c) 2016-2025 maptalks.com
 */
import createREGL from '@maptalks/regl';
export { default as createREGL } from '@maptalks/regl';
import { mat4, vec3, vec4, mat3, vec2, quat, glMatrix, mat2, mat2d, quat2 } from 'gl-matrix';
export { mat2, mat2d, mat3, mat4, quat, quat2, vec2, vec3, vec4 } from 'gl-matrix';
import * as maptalks from 'maptalks';
import { Coordinate, Util as Util$1, Point, Polygon, Extent, worker, Map as Map$1, renderer } from 'maptalks';
import { buildTangents, packTangentFrame, buildNormals } from '@maptalks/tbn-packer';
import { GLContext } from '@maptalks/fusiongl';
export { GLContext } from '@maptalks/fusiongl';

const getGlobal$1 = 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$1();

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$1.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$1()['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$1()['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 u(e,t,s){return e[0]=t[0]*s,e[1]=t[1]*s,e[2]=t[2]*s,e}function h(e,t,s,r,n){return e[0]=t,e[1]=s,e[2]=r,e[3]=n,e}function c(e,t,s){var r=t[0],n=t[1],i=t[2],a=t[3];return e[0]=s[0]*r+s[4]*n+s[8]*i+s[12]*a,e[1]=s[1]*r+s[5]*n+s[9]*i+s[13]*a,e[2]=s[2]*r+s[6]*n+s[10]*i+s[14]*a,e[3]=s[3]*r+s[7]*n+s[11]*i+s[15]*a,e}function l(){var e=new s(4);return s!=Float32Array&&(e[0]=0,e[1]=0,e[2]=0),e[3]=1,e}Math.hypot||(Math.hypot=function(){for(var e=0,t=arguments.length;t--;)e+=arguments[t]*arguments[t];return Math.sqrt(e)}),n(),function(){var e;e=new s(4),s!=Float32Array&&(e[0]=0,e[1]=0,e[2]=0,e[3]=0);}();var d,m=function(e,t){return e[0]=t[0],e[1]=t[1],e[2]=t[2],e[3]=t[3],e};n(),i(1,0,0),i(0,1,0),l(),l(),d=new s(9),s!=Float32Array&&(d[1]=0,d[2]=0,d[3]=0,d[5]=0,d[6]=0,d[7]=0),d[0]=1,d[4]=1,d[8]=1;let g=0;function p(e){return null==e}function b(e){return !p(e)}function _(e){return !p(e)&&("string"==typeof e||null!==e.constructor&&e.constructor===String)}function y(e){for(let t=1;t<arguments.length;t++){const s=arguments[t];for(const t in s)e[t]=s[t];}return e}function x(e){switch(e){case 5120:return Int8Array;case 5121:return Uint8Array;case 5122:return Int16Array;case 5123:return Uint16Array;case 5124:return Int32Array;case 5125:return Uint32Array;case 5126:return Float32Array}throw new Error("unsupported bufferView's component type: "+e)}function w(e){return 0===e.indexOf("data:")&&e.indexOf("base64,")>0}function T(e){const t=function(e){return "undefined"!=typeof self?self.atob(e):window.atob(e)}(e.substring(e.indexOf(",")+1)),s=t.length,r=new Uint8Array(s);for(let e=0;e<s;e++)r[e]=t.charCodeAt(e);return r.buffer}const E=[],O=[],I=[],R=[0,0,0],A=function(e){return e[0]=0,e[1]=0,e[2]=0,e[3]=1,e}([]),q=[1,1,1];function B(e,t,s,r,n,i,a){const o=x(a),f=o.BYTES_PER_ELEMENT;if((0===n||n===r*f)&&i%f==0){const n=new o(t,i,s*r);return e.set(n),e}0===n&&(n=r*f);const u=new Uint8Array(r*f);for(let a=0;a<s;a++){let s=null;const h=new 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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 r={textures:this.gltf.textures,asset:this.gltf.asset,scene:s,scenes:t,nodes:e,meshes:this.meshes,materials:this.gltf.materials,skins:this.skins,extensionsRequired:this.gltf.extensionsRequired,extensionsUsed:this.gltf.extensionsUsed};if(this.gltf.extensions&&(r.extensions=this.gltf.extensions),1===this.version){const e=this.adapter._loadMaterials(this.gltf.materials);r.materials=e;}return delete this.gltf.buffers,r.json=this.gltf,r}))}_loadNodes(e){return this._loadMeshes(e).then((()=>{const e=this.nodes={};return this.adapter.iterate(((t,s)=>{const r=this.adapter.createNode(s,this.meshes,this.skins);e[t]=r;}),"nodes"),e}))}_loadSkins(){this.skins=[];const e=[];return this.adapter.iterate(((t,s,r)=>{e.push(this._loadSkin(s).then((e=>{e.index=r,this.skins.push(e);})));}),"skins"),e}_loadSkin(e){const t=e.inverseBindMatrices;return this.adapter.accessor._requestData("inverseBindMatrices",t).then((t=>(e.inverseBindMatrices=t,t&&t.buffer&&this.transferables&&this.transferables.indexOf(t.buffer)<0&&this.transferables.push(t.buffer),e)))}_loadAnimations(){const e=this.gltf.animations;return b(e)?this.adapter.getAnimations(e):null}_loadMeshes(e){this.meshes={};let t=[];return this.adapter.iterate(((s,r,n)=>{t.push(this._loadMesh(r,e).then((e=>{e.index=n,this.meshes[s]=e;})));}),"meshes"),t=t.concat(this._loadSkins()),Promise.all(t)}_loadMesh(e,t){const s=e.primitives.map((e=>this._loadPrimitive(e,t))).filter((e=>!!e));return Promise.all(s).then((t=>{const s={};return y(s,e),s.primitives=t,s}))}_loadTextures(){const e=this.gltf.textures;if(!e)return null;const t=[];for(const s in e)t.push(this.adapter._getTexture(s));return Promise.all(t).then((t=>{if(this.transferables)for(let e=0;e<t.length;e++){const s=t[e]&&t[e].image.array;if(s){let e;e=s instanceof ImageBitmap?s:s.buffer,e&&this.transferables.indexOf(e)<0&&this.transferables.push(e);}}if(!Array.isArray(e)){const s={},r=Object.keys(e);for(let e=0;e<t.length;e++)t[e]&&(s[r[e]]=t[e]);return s}return t}))}_loadPrimitive(e,t){let s;const r=[],n=e.extensions;if(b(e.targets))for(let t=0;t<e.targets.length;t++){const s=e.targets[t];for(const e in s){const n=this.adapter.accessor._requestData(`morphTargets_${e}_${t}`,s[e]);n&&r.push(n);}}if(n&&n.KHR_draco_mesh_compression){if(!this.options.decoders.draco&&(!this.gltf.extensionsRequired||!this.gltf.extensionsRequired.indexOf("KHR_draco_mesh_compression")<0))return null;const e=this.options.decoders.draco,{bufferView:i,attributes:a}=n.KHR_draco_mesh_compression,o=this.gltf.bufferViews[i],f=this._accessor._requestBufferOfBufferView(o).then((s=>{const{buffer:r,byteOffset:n}=s;let{byteOffset:i}=o;const f=o.byteLength;i||(i=0);const u=new DataView(r,n+i,f),h={attributes:a,useUniqueIDs:!1,skipAttributeTransform:t.skipAttributeTransform};return e(u,h).then((e=>{const t=Object.values(e.attributes);return e.indices&&t.push(e.indices),t}))}));r.push(f),s=Promise.all(r);}else {const t=e.attributes;for(const e in t){const s=this.adapter.accessor._requestData(e,t[e]);s&&r.push(s);}if(b(e.indices)){const t=this.adapter.accessor._requestData("indices",e.indices);t&&r.push(t);}s=Promise.all(r);}return s.then((t=>{if(n&&n.KHR_draco_mesh_compression){const s=e.targets?e.targets.length:0;t[s]=t[s].concat(t.slice(0,s)),t=t[s];}let s,r;const i={attributes:t.reduce(((e,t)=>{if("indices"===t.name)s=t;else if(t.name.indexOf("morphTargets_")>-1)r=r||{},r[t.name.slice(13)]=t;else {if(!("POSITION"!==t.name||t.min&&t.max)){const e=[1/0,1/0,1/0],s=[-1/0,-1/0,-1/0],{itemSize:r,array:n}=t,i=n.length/r;for(let t=0;t<i;t++)for(let i=0;i<r;i++){const a=t*r+i;n[a]<e[i]&&(e[i]=n[a]),n[a]>s[i]&&(s[i]=n[a]);}if(t.quantization){const r=t.quantization,n=r.range/(1<<r.quantizationBits),i=r.minValues;u(e,e,n),f(e,e,i),u(s,s,n),f(s,s,i);}t.min=e,t.max=s;}e[t.name]=t;}return this.transferables&&t.array.buffer&&this.transferables.indexOf(t.array.buffer)<0&&this.transferables.push(t.array.buffer),e}),{}),material:e.material};return s&&(i.indices=s),r&&(i.morphTargets=r),i.mode=b(e.mode)?e.mode:4,b(e.extras)&&(i.extras=e.extras),i}))}},t().maptalks_gltf_loader=e;}gltfLoaderExport({});

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

/**
 * 对象是否是字符串
 * @english
 * Check whether the object is a string
 * @param obj
 */
function isString(obj) {
    if (isNil$2(obj)) {
        return false;
    }
    return typeof obj === 'string' || (obj.constructor !== null && obj.constructor === String);
}
/**
 * 对象是否是null或undefined
 * @english
 * Whether the object is null or undefined.
 * @param  obj - object
 */
function isNil$2(obj) {
    return obj == null;
}
function defined(obj) {
    return !isNil$2(obj);
}
/**
 * 对象是否是函数
 * @english
 * Check whether the object is a function
 * @param obj
 */
function isFunction$1(obj) {
    if (isNil$2(obj)) {
        return false;
    }
    return typeof obj === 'function' || (obj.constructor !== null && obj.constructor === Function);
}
/**
 * 将后续所有对象属性合并到第一个dest对象中
 * @english
 * Merges the properties of sources into destination object.
 * @param dest - object to extend
 * @param src - sources
 */
function extend$1(dest, ...src) {
    Object.assign(dest, ...src);
    return dest;
}
/**
 * 将后续所有对象属性合并到第一个dest对象中，但忽略undefined或null的属性
 * @english
 * Merges the properties of sources into destination object without nil properties.
 * @param dest - object to extend
 * @param src - sources
 */
function extendWithoutNil(dest, ...args) {
    for (let i = 0; i < args.length; i++) {
        const src = args[i];
        for (const k in src) {
            if (src[k] !== undefined && src[k] !== null) {
                dest[k] = src[k];
            }
        }
    }
    return dest;
}
// export function extend2(dest) {
//     for (let i = 1; i < arguments.length; i++) {
//         const src = arguments[i];
//         for (const k in src) {
//             if (dest[k] === undefined) {
//                 dest[k] = src[k];
//             }
//         }
//     }
//     return dest;
// }
/**
 * 检查是否是个数值
 * @english
 * Whether val is a number and not a NaN.
 * @param  val - val
 */
function isNumber$2(val) {
    return (typeof val === 'number') && !isNaN(val);
}
/**
 * 计算值的log2
 * @english
 * compute value's log2
 * @param x - value to log
 * @returns
 */
function log2(x) {
    return Math.log2(x);
}
/**
 * 归一化数组
 * @english
 * normalize a number array
 * @param out - array receives result
 * @param arr - array
 * @returns out
 */
function normalize(out, arr) {
    let sum = 0;
    for (let i = 0, l = arr.length; i < l; i++) {
        sum += arr[i];
    }
    for (let i = 0, l = arr.length; i < l; i++) {
        out[i] = arr[i] / sum;
    }
    return out;
}
/**
 * 两个数值之间的比例推算
 *
 * @english
 * Interpolate between two number.
 *
 * @param from  - from value
 * @param to    - to value
 * @param t     - interpolation factor between 0 and 1
 * @returns     interpolated value
 */
function interpolate$1(a, b, t) {
    return (a * (1 - t)) + (b * t);
}
/**
 * 检查对象是否是数组或者类型数组
 * @english
 * Check if is an Array or a TypedArray
 * @param arr - input object
 * @returns
 */
function isArray(arr) {
    return Array.isArray(arr) ||
        (arr instanceof Uint8Array) ||
        (arr instanceof Int8Array) ||
        (arr instanceof Uint16Array) ||
        (arr instanceof Int16Array) ||
        (arr instanceof Uint32Array) ||
        (arr instanceof Int32Array) ||
        (arr instanceof Uint8ClampedArray) ||
        (arr instanceof Float32Array) ||
        (arr instanceof Float64Array);
}
function getArrayCtor(arr) {
    return Array.isArray(arr) && Array ||
        (arr instanceof Uint8Array) && Uint8Array ||
        (arr instanceof Int8Array) && Int8Array ||
        (arr instanceof Uint16Array) && Uint16Array ||
        (arr instanceof Int16Array) && Int16Array ||
        (arr instanceof Uint32Array) && Uint32Array ||
        (arr instanceof Int32Array) && Int32Array ||
        (arr instanceof Uint8ClampedArray) && Uint8ClampedArray ||
        (arr instanceof Float32Array) && Float32Array ||
        (arr instanceof Float64Array) && Float64Array;
}
/**
 * 对两个矢量执行线性推算
 *
 * @english
 * Performs a linear interpolation between two number's
 *
 * @param out   - the receiving vector
 * @param a     - the first operand
 * @param b     - the second operand
 * @param t     - interpolation amount, in the range [0-1], between the two inputs
 * @returns out
 */
function lerp$1(out, a, b, t) {
    for (let i = 0; i < out.length; i++) {
        out[i] = a[i] + t * (b[i] - a[i]);
    }
    return out;
}
/**
 * 将input数组的值设置给out
 * @english
 * Set input array's value to out
 * @param out - the receiving array
 * @param input - input array
 * @returns out
 */
function set(out, input) {
    for (let i = 0; i < out.length; i++) {
        out[i] = input[i];
    }
    return out;
}
/**
 * 根据Position的最大值，选择一个合适的TypedArray
 * @english
 * Choose a TypedArray for position according to its max value
 * @param max - position's max value
 * @returns
 */
function getPosArrayType(max) {
    max = Math.abs(max);
    if (max < 128)
        return Int8Array;
    if (max < 65536 / 2)
        return Int16Array;
    return Float32Array;
}
/**
 * n大于max时返回max，n小于min时返回min，否则返回n
 * @english
 * Clamp input value between min and max
 * @param n - input value
 * @param min - min value
 * @param max - max value
 */
function clamp$1(n, min, max) {
    return Math.min(max, Math.max(min, n));
}
/**
 * 检查当前环境是否支持VAO
 * @english
 * Check if current context supports VAO
 * @param regl regl context
 * @returns
 */
function _isSupportVAO(regl) {
    if (globalThis['MAPTALKS_DISABLE_VAO']) {
        return false;
    }
    if (regl.wgpu) {
        return false;
    }
    // return false;
    return regl && regl.hasExtension && regl.hasExtension('oes_vertex_array_object');
}
function isSupportVAO(regl) {
    if (regl.supportVAO === undefined) {
        regl.supportVAO = _isSupportVAO(regl);
    }
    return regl.supportVAO;
}
/**
 * Object.hasOwnProperty的包装方法
 * @english
 * Check if object hasOwnProperty of property
 * @param obj - object
 * @param prop - property
 * @returns
 */
function hasOwn$1(obj, prop) {
    return Object.prototype.hasOwnProperty.call(obj, prop);
}
/**
 * 获取buffer的byte大小
 * @english
 * Get buffer's size in bytes
 * @param buffer
 */
function getBufferSize(buffer) {
    if (buffer.data) {
        buffer = buffer;
        if (buffer.data.BYTES_PER_ELEMENT) {
            return buffer.data.length * buffer.data.BYTES_PER_ELEMENT;
        }
        else if (buffer.data.length) {
            return buffer.data.length * 4;
        }
    }
    else if (buffer.BYTES_PER_ELEMENT) {
        return buffer.length * buffer.BYTES_PER_ELEMENT;
    }
    else if (buffer.length) {
        // FLOAT32 in default
        return buffer.length * 4;
    }
    else if (buffer.buffer && buffer.buffer.destroy) {
        const reglBuffer = buffer.buffer['_buffer'];
        if (reglBuffer) {
            // regl
            return reglBuffer.byteLength;
        }
        else {
            // webgpu
            return buffer.buffer.size;
        }
    }
    return 0;
}
/**
 * 获取regl texture对象的bytes大小
 * @english
 * Get regl texture size in bytes
 * @param tex - regl rexture
 * @returns
 */
function getTexMemorySize(tex) {
    return tex.width * tex.height * getTextureChannels(tex.format) * getTextureByteWidth(tex.type) * (tex['_reglType'] === 'textureCube' ? 6 : 1);
}
/**
 * 获取regl texture的byte width
 * @english
 * Get regl texture's byte width
 * @param type - regl texture's type
 * @returns
 */
function getTextureByteWidth(type) {
    if (type === 'uint8') {
        return 1;
    }
    else if (type === 'uint16' || type === 'float16' || type === 'half float') {
        return 2;
    }
    else if (type === 'uint32' || type === 'float' || type === 'float32') {
        return 4;
    }
    return 0;
}
/**
 * 获取regl texture 的channels数量
 * @english
 * Get regl texture's number of channels
 * @param format - regl texture's format
 * @returns
 */
function getTextureChannels(format) {
    if (format === 'depth' || format === 'alpha' || format === 'luminance') {
        return 1;
    }
    else if (format === 'luminance alpha' || format === 'depth stencil') {
        return 2;
    }
    else if (format === 'srgba' || format === 'rgb5 a1' || format.substring(0, 4) === 'rgba') {
        return 4;
    }
    else if (format === 'srgb' || format.substring(0, 3) === 'rgb') {
        return 3;
    }
    return 1;
}
/**
 * 检查该attribute数据是否处于interleaved数据中
 * @english
 * Check if this attribute data is in interleaved stride
 * @param dataObj attribute object
 * @returns
 */
function isInStride(dataObj) {
    // if (!array || !array.buffer) {
    //     return false;
    // }
    // const bytesLen = array.length * array.BYTES_PER_ELEMENT;
    // const bufLen = array.buffer.byteLength;
    // return bytesLen < bufLen;
    if (!dataObj.componentType) {
        return false;
    }
    const gltf = getGLTFLoaderBundle();
    const ctor = gltf.GLTFLoader.getTypedArrayCtor(dataObj.componentType);
    return dataObj.byteStride > 0 && dataObj.byteStride !== dataObj.itemSize * ctor.BYTES_PER_ELEMENT;
}
/**
 * 检查该attribute数据是否是interleaved
 * @english
 * Check if this attribute data is an interleaved data
 * @param dataObj attribute object
 * @returns
 */
function isInterleaved(dataObj) {
    return dataObj && (dataObj.stride > 0 || isInStride(dataObj));
    // const { stride, componentType, count, size } = dataObj;
    // const bytesPerElement = gltf.GLTFLoader.getTypedArrayCtor(componentType).BYTES_PER_ELEMENT;
    // return stride > bytesPerElement * count * size;
}
/**
 * 获取该webgl上下文支持的压缩纹理格式
 * @english
 * Get webgl context's supported formats for compressed texture
 * @param gl
 * @returns
 */
function getSupportedFormats(gl) {
    const webgl = gl.getExtension && gl;
    const webgpu = !webgl && gl;
    const prefixWebGL = 'WEBGL_compressed_texture_';
    const prefixWebGPU = 'texture-compression-';
    const formats = {
        'etc': webgl ? !!webgl.getExtension(prefixWebGL + 'etc') : !!webgpu.features.has(prefixWebGPU + 'etc2'),
        'etc1': webgl ? !!webgl.getExtension(prefixWebGL + 'etc1') : !!webgpu.features.has(prefixWebGPU + 'etc2'),
        's3tc': webgl ? !!webgl.getExtension(prefixWebGL + 's3tc') : !!webgpu.features.has(prefixWebGPU + 'bc'),
        'pvrtc': webgl ? !!webgl.getExtension(prefixWebGL + 'pvrtc') : false,
        'astc': webgl ? !!webgl.getExtension(prefixWebGL + 'astc') : !!webgpu.features.has(prefixWebGPU + 'astc'),
        'bc7': webgl ? !!webgl.getExtension('EXT_texture_compression_bptc') : !!webgpu.features.has(prefixWebGPU + 'bc'),
    };
    formats[prefixWebGL + 'etc'] = formats['etc'];
    formats[prefixWebGL + 'etc1'] = formats['etc1'];
    formats[prefixWebGL + 's3tc'] = formats['s3tc'];
    formats[prefixWebGL + 'pvrtc'] = formats['pvrtc'];
    formats[prefixWebGL + 'astc'] = formats['astc'];
    formats[prefixWebGL + 'bc7'] = formats['bc7'];
    return formats;
}
/**
 * 获取字符串的hash值
 * @english
 * Get string's hash code
 * @param s input string
 * @returns
 */
function hashCode(s) {
    let hash = 0;
    const strlen = s && s.length || 0;
    if (!strlen) {
        return hash;
    }
    let c;
    for (let i = 0; i < strlen; i++) {
        c = s.charCodeAt(i);
        hash = ((hash << 5) - hash) + c;
        hash = hash & hash; // Convert to 32bit integer
    }
    return hash;
}
/**
 * 值是否是2的n次幂
 * @english
 * Get the nearest power of 2 that is less than this value
 * @param value - input value
 * @returns
 */
function isPowerOfTwo$1(value) {
    return (value & (value - 1)) === 0 && value !== 0;
}
/**
 * 获取小于该值的最接近的2次幂
 * @english
 * Get power of 2 that smaller than
 * @param value - input value
 * @returns
 */
function floorPowerOfTwo(value) {
    return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));
}
// function ceilPowerOfTwo(value) {
//     return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));
// }
function resizeFromArray(arr, width, height) {
    let newWidth = width;
    let newHeight = height;
    if (!isPowerOfTwo$1(width)) {
        newWidth = floorPowerOfTwo(width);
    }
    if (!isPowerOfTwo$1(height)) {
        newHeight = floorPowerOfTwo(height);
    }
    const imageData = new ImageData(new Uint8ClampedArray(arr), width, height);
    const srcCanvas = document.createElement('canvas');
    srcCanvas.width = width;
    srcCanvas.height = height;
    srcCanvas.getContext('2d').putImageData(imageData, 0, 0);
    const canvas = document.createElement('canvas');
    canvas.width = newWidth;
    canvas.height = newHeight;
    canvas.getContext('2d').drawImage(srcCanvas, 0, 0, width, height, 0, 0, newHeight, newHeight);
    console.warn(`Texture's size is not power of two, resize from (${width}, ${height}) to (${newWidth}, ${newHeight})`);
    let debugCanvas = document.getElementById('_debug_resize_canvas');
    if (!debugCanvas) {
        debugCanvas = document.createElement('canvas');
        debugCanvas.id = '_debug_resize_canvas';
        document.body.appendChild(debugCanvas);
    }
    debugCanvas.width = newWidth;
    debugCanvas.height = newHeight;
    debugCanvas.getContext('2d').drawImage(canvas, 0, 0);
    return canvas;
}
function resizeToPowerOfTwo(image, width, height) {
    if (isArray(image)) {
        image = image;
        if (!isPowerOfTwo$1(width) || !isPowerOfTwo$1(height)) {
            return resizeFromArray(image, width, height);
        }
        else {
            return image;
        }
    }
    image = image;
    if (isPowerOfTwo$1(image.width) && isPowerOfTwo$1(image.height)) {
        return image;
    }
    width = image.width;
    height = image.height;
    if (!isPowerOfTwo$1(width)) {
        width = floorPowerOfTwo(width);
    }
    if (!isPowerOfTwo$1(height)) {
        height = floorPowerOfTwo(height);
    }
    const canvas = document.createElement('canvas');
    canvas.width = width;
    canvas.height = height;
    canvas.getContext('2d').drawImage(image, 0, 0, width, height);
    const url = image.src;
    const idx = url.lastIndexOf('/') + 1;
    const filename = url.substring(idx);
    console.warn(`Texture(${filename})'s size is not power of two, resize from (${image.width}, ${image.height}) to (${width}, ${height})`);
    return canvas;
}
function supportNPOT(regl) {
    if (reg