text: import { Color } from '../math/Color.js';
  import { Vector2 } from '../math/Vector2.js';
  import { Vector3 } from '../math/Vector3.js';
  import { Vector4 } from '../math/Vector4.js';
  import { Matrix3 } from '../math/Matrix3.js';
  import { Matrix4 } from '../math/Matrix4.js';
  import { FileLoader } from './FileLoader.js';
  import { Loader } from './Loader.js';
  import * as Materials from '../materials/Materials.js';
  
  /**
   * @author mrdoob / http://mrdoob.com/
   */
  
  function MaterialLoader( manager ) {
  
  	Loader.call( this, manager );
  
  	this.textures = {};
  
  }
  
  MaterialLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
  
  	constructor: MaterialLoader,
  
  	load: function ( url, onLoad, onProgress, onError ) {
  
  		var scope = this;
  
  		var loader = new FileLoader( scope.manager );
  		loader.setPath( scope.path );
  		loader.load( url, function ( text ) {
  
  			onLoad( scope.parse( JSON.parse( text ) ) );
  
  		}, onProgress, onError );
  
  	},
  
  	parse: function ( json ) {
  
  		var textures = this.textures;
  
  		function getTexture( name ) {
  
  			if ( textures[ name ] === undefined ) {
  
  				console.warn( 'THREE.MaterialLoader: Undefined texture', name );
  
  			}
  
  			return textures[ name ];
  
  		}
  
  		var material = new Materials[ json.type ]();
  
  		if ( json.uuid !== undefined ) material.uuid = json.uuid;
  		if ( json.name !== undefined ) material.name = json.name;
  		if ( json.color !== undefined ) material.color.setHex( json.color );
  		if ( json.roughness !== undefined ) material.roughness = json.roughness;
  		if ( json.metalness !== undefined ) material.metalness = json.metalness;
  		if ( json.emissive !== undefined ) material.emissive.setHex( json.emissive );
  		if ( json.specular !== undefined ) material.specular.setHex( json.specular );
  		if ( json.shininess !== undefined ) material.shininess = json.shininess;
  		if ( json.clearcoat !== undefined ) material.clearcoat = json.clearcoat;
  		if ( json.clearcoatRoughness !== undefined ) material.clearcoatRoughness = json.clearcoatRoughness;
  		if ( json.vertexColors !== undefined ) material.vertexColors = json.vertexColors;
  		if ( json.fog !== undefined ) material.fog = json.fog;
  		if ( json.flatShading !== undefined ) material.flatShading = json.flatShading;
  		if ( json.blending !== undefined ) material.blending = json.blending;
  		if ( json.combine !== undefined ) material.combine = json.combine;
  		if ( json.side !== undefined ) material.side = json.side;
  		if ( json.opacity !== undefined ) material.opacity = json.opacity;
  		if ( json.transparent !== undefined ) material.transparent = json.transparent;
  		if ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;
  		if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
  		if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
  		if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
  		if ( json.wireframe !== undefined ) material.wireframe = json.wireframe;
  		if ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;
  		if ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;
  		if ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;
  
  		if ( json.rotation !== undefined ) material.rotation = json.rotation;
  
  		if ( json.linewidth !== 1 ) material.linewidth = json.linewidth;
  		if ( json.dashSize !== undefined ) material.dashSize = json.dashSize;
  		if ( json.gapSize !== undefined ) material.gapSize = json.gapSize;
  		if ( json.scale !== undefined ) material.scale = json.scale;
  
  		if ( json.polygonOffset !== undefined ) material.polygonOffset = json.polygonOffset;
  		if ( json.polygonOffsetFactor !== undefined ) material.polygonOffsetFactor = json.polygonOffsetFactor;
  		if ( json.polygonOffsetUnits !== undefined ) material.polygonOffsetUnits = json.polygonOffsetUnits;
  
  		if ( json.skinning !== undefined ) material.skinning = json.skinning;
  		if ( json.morphTargets !== undefined ) material.morphTargets = json.morphTargets;
  		if ( json.morphNormals !== undefined ) material.morphNormals = json.morphNormals;
  		if ( json.dithering !== undefined ) material.dithering = json.dithering;
  
  		if ( json.visible !== undefined ) material.visible = json.visible;
  
  		if ( json.toneMapped !== undefined ) material.toneMapped = json.toneMapped;
  
  		if ( json.userData !== undefined ) material.userData = json.userData;
  
  		// Shader Material
  
  		if ( json.uniforms !== undefined ) {
  
  			for ( var name in json.uniforms ) {
  
  				var uniform = json.uniforms[ name ];
  
  				material.uniforms[ name ] = {};
  
  				switch ( uniform.type ) {
  
  					case 't':
  						material.uniforms[ name ].value = getTexture( uniform.value );
  						break;
  
  					case 'c':
  						material.uniforms[ name ].value = new Color().setHex( uniform.value );
  						break;
  
  					case 'v2':
  						material.uniforms[ name ].value = new Vector2().fromArray( uniform.value );
  						break;
  
  					case 'v3':
  						material.uniforms[ name ].value = new Vector3().fromArray( uniform.value );
  						break;
  
  					case 'v4':
  						material.uniforms[ name ].value = new Vector4().fromArray( uniform.value );
  						break;
  
  					case 'm3':
  						material.uniforms[ name ].value = new Matrix3().fromArray( uniform.value );
  
  					case 'm4':
  						material.uniforms[ name ].value = new Matrix4().fromArray( uniform.value );
  						break;
  
  					default:
  						material.uniforms[ name ].value = uniform.value;
  
  				}
  
  			}
  
  		}
  
  		if ( json.defines !== undefined ) material.defines = json.defines;
  		if ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;
  		if ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;
  
  		if ( json.extensions !== undefined ) {
  
  			for ( var key in json.extensions ) {
  
  				material.extensions[ key ] = json.extensions[ key ];
  
  			}
  
  		}
  
  		// Deprecated
  
  		if ( json.shading !== undefined ) material.flatShading = json.shading === 1; // THREE.FlatShading
  
  		// for PointsMaterial
  
  		if ( json.size !== undefined ) material.size = json.size;
  		if ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;
  
  		// maps
  
  		if ( json.map !== undefined ) material.map = getTexture( json.map );
  		if ( json.matcap !== undefined ) material.matcap = getTexture( json.matcap );
  
  		if ( json.alphaMap !== undefined ) {
  
  			material.alphaMap = getTexture( json.alphaMap );
  			material.transparent = true;
  
  		}
  
  		if ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );
  		if ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;
  
  		if ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );
  		if ( json.normalMapType !== undefined ) material.normalMapType = json.normalMapType;
  		if ( json.normalScale !== undefined ) {
  
  			var normalScale = json.normalScale;
  
  			if ( Array.isArray( normalScale ) === false ) {
  
  				// Blender exporter used to export a scalar. See #7459
  
  				normalScale = [ normalScale, normalScale ];
  
  			}
  
  			material.normalScale = new Vector2().fromArray( normalScale );
  
  		}
  
  		if ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );
  		if ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;
  		if ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;
  
  		if ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );
  		if ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );
  
  		if ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );
  		if ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;
  
  		if ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );
  
  		if ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );
  		if ( json.envMapIntensity !== undefined ) material.envMapIntensity = json.envMapIntensity;
  
  		if ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;
  		if ( json.refractionRatio !== undefined ) material.refractionRatio = json.refractionRatio;
  
  		if ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );
  		if ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;
  
  		if ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );
  		if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;
  
  		if ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );
  
  		if ( json.clearcoatNormalMap !== undefined ) material.clearcoatNormalMap = getTexture( json.clearcoatNormalMap );
  		if ( json.clearcoatNormalScale !== undefined ) material.clearcoatNormalScale = new Vector2().fromArray( json.clearcoatNormalScale );
  
  		return material;
  
  	},
  
  	setTextures: function ( value ) {
  
  		this.textures = value;
  		return this;
  
  	}
  
  } );
  
  
  export { MaterialLoader };
  