three 基础库
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( function () {
class HDRCubeTextureLoader extends THREE.Loader {
constructor( manager ) {
super( manager );
this.hdrLoader = new THREE.RGBELoader();
this.type = THREE.UnsignedByteType;
}
load( urls, onLoad, onProgress, onError ) {
if ( ! Array.isArray( urls ) ) {
console.warn( 'THREE.HDRCubeTextureLoader signature has changed. Use .setDataType() instead.' );
this.setDataType( urls );
urls = onLoad;
onLoad = onProgress;
onProgress = onError;
onError = arguments[ 4 ];
}
const texture = new THREE.CubeTexture();
texture.type = this.type;
switch ( texture.type ) {
case THREE.UnsignedByteType:
texture.encoding = THREE.RGBEEncoding;
texture.format = THREE.RGBAFormat;
texture.minFilter = THREE.NearestFilter;
texture.magFilter = THREE.NearestFilter;
texture.generateMipmaps = false;
break;
case THREE.FloatType:
texture.encoding = THREE.LinearEncoding;
texture.format = THREE.RGBFormat;
texture.minFilter = THREE.LinearFilter;
texture.magFilter = THREE.LinearFilter;
texture.generateMipmaps = false;
break;
case THREE.HalfFloatType:
texture.encoding = THREE.LinearEncoding;
texture.format = THREE.RGBFormat;
texture.minFilter = THREE.LinearFilter;
texture.magFilter = THREE.LinearFilter;
texture.generateMipmaps = false;
break;
}
const scope = this;
let loaded = 0;
function loadHDRData( i, onLoad, onProgress, onError ) {
new THREE.FileLoader( scope.manager ).setPath( scope.path ).setResponseType( 'arraybuffer' ).setWithCredentials( scope.withCredentials ).load( urls[ i ], function ( buffer ) {
loaded ++;
const texData = scope.hdrLoader.parse( buffer );
if ( ! texData ) return;
if ( texData.data !== undefined ) {
const dataTexture = new THREE.DataTexture( texData.data, texData.width, texData.height );
dataTexture.type = texture.type;
dataTexture.encoding = texture.encoding;
dataTexture.format = texture.format;
dataTexture.minFilter = texture.minFilter;
dataTexture.magFilter = texture.magFilter;
dataTexture.generateMipmaps = texture.generateMipmaps;
texture.images[ i ] = dataTexture;
}
if ( loaded === 6 ) {
texture.needsUpdate = true;
if ( onLoad ) onLoad( texture );
}
}, onProgress, onError );
}
for ( let i = 0; i < urls.length; i ++ ) {
loadHDRData( i, onLoad, onProgress, onError );
}
return texture;
}
setDataType( value ) {
this.type = value;
this.hdrLoader.setDataType( value );
return this;
}
}
THREE.HDRCubeTextureLoader = HDRCubeTextureLoader;
} )();