706 materialParams.depthWrite = false; } else { materialParams.transparent = false; if ( alphaMode === ALPHA_MODES.MASK ) { materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5; } } if ( materialDef.normalTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) { pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) ); // https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995 materialParams.normalScale = new THREE.Vector2( 1, - 1 ); if ( materialDef.normalTexture.scale !== undefined ) { materialParams.normalScale.set( materialDef.normalTexture.scale, - materialDef.normalTexture.scale ); } } if ( materialDef.occlusionTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) { pending.push( parser.assignTexture( materialParams, 'aoMap', materialDef.occlusionTexture ) ); if ( materialDef.occlusionTexture.strength !== undefined ) { materialParams.aoMapIntensity = materialDef.occlusionTexture.strength; } } if ( materialDef.emissiveFactor !== undefined && materialType !== THREE.MeshBasicMaterial ) { materialParams.emissive = new THREE.Color().fromArray( materialDef.emissiveFactor ); } if ( materialDef.emissiveTexture !== undefined && materialType !== THREE.MeshBasicMaterial ) { pending.push( parser.assignTexture( materialParams, 'emissiveMap', materialDef.emissiveTexture ) ); } return Promise.all( pending ).then( function () { let material; if ( materialType === GLTFMeshStandardSGMaterial ) { material = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ].createMaterial( materialParams ); } else { material = new materialType( materialParams ); } if ( materialDef.name ) material.name = materialDef.name; // baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding. if ( material.map ) material.map.encoding = THREE.sRGBEncoding; if ( material.emissiveMap ) material.emissiveMap.encoding = THREE.sRGBEncoding; assignExtrasToUserData( material, materialDef ); parser.associations.set( material, { type: 'materials', index: materialIndex } ); if ( materialDef.extensions ) addUnknownExtensionsToUserData( extensions, material, materialDef ); return material; } ); } /** When THREE.Object3D instances are targeted by animation, they need unique names. */ createUniqueName( originalName ) { const sanitizedName = THREE.PropertyBinding.sanitizeNodeName( originalName || '' ); let name = sanitizedName; for ( let i = 1; this.nodeNamesUsed[ name ]; ++ i ) { name = sanitizedName + '_' + i; } this.nodeNamesUsed[ name ] = true; return name; } /** * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry * * Creates BufferGeometries from primitives. * * @param {Array} primitives * @return {Promise>} */ loadGeometries( primitives ) { const parser = this; const extensions = this.extensions; const cache = this.primitiveCache; function createDracoPrimitive( primitive ) { return extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ].decodePrimitive( primitive, parser ).then( function ( geometry ) { return addPrimitiveAttributes( geometry, primitive, parser ); } ); } const pending = []; for ( let i = 0, il = primitives.length; i < il; i ++ ) { const primitive = primitives[ i ]; const cacheKey = createPrimitiveKey( primitive ); // See if we've already created this geometry const cached = cache[ cacheKey ]; if ( cached ) { // Use the cached geometry if it exists pending.push( cached.promise ); } else { let geometryPromise; if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) { // Use DRACO geometry if available geometryPromise = createDracoPrimitive( primitive ); } else { // Otherwise create a new geometry geometryPromise = addPrimitiveAttributes( new THREE.BufferGeometry(), primitive, parser ); } // Cache this geometry cache[ cacheKey ] = { primitive: primitive, promise: geometryPromise }; pending.push( geometryPromise ); } } return Promise.all( pending ); } /** * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes * @param {number} meshIndex * @return {Promise} */ loadMesh( meshIndex ) { const parser = this; const json = this.json; const extensions = this.extensions; const meshDef = json.meshes[ meshIndex ]; const primitives = meshDef.primitives; const pending = []; for ( let i = 0, il = primitives.len