three-stdlib/loaders/LWOLoader.cjs.map

stand-alone library of threejs examples

{"version":3,"file":"LWOLoader.cjs","sources":["../../src/loaders/LWOLoader.js"],"sourcesContent":["/**\n * @version 1.1.1\n *\n * @desc Load files in LWO3 and LWO2 format on Three.js\n *\n * LWO3 format specification:\n * \thttp://static.lightwave3d.com/sdk/2018/html/filefmts/lwo3.html\n *\n * LWO2 format specification:\n * \thttp://static.lightwave3d.com/sdk/2018/html/filefmts/lwo2.html\n *\n **/\n\nimport {\n  AddOperation,\n  BackSide,\n  BufferAttribute,\n  BufferGeometry,\n  ClampToEdgeWrapping,\n  Color,\n  DoubleSide,\n  EquirectangularReflectionMapping,\n  EquirectangularRefractionMapping,\n  FileLoader,\n  Float32BufferAttribute,\n  FrontSide,\n  LineBasicMaterial,\n  LineSegments,\n  Loader,\n  Mesh,\n  MeshPhongMaterial,\n  MeshPhysicalMaterial,\n  MeshStandardMaterial,\n  MirroredRepeatWrapping,\n  Points,\n  PointsMaterial,\n  RepeatWrapping,\n  TextureLoader,\n  Vector2,\n} from 'three'\n\nimport { IFFParser } from './lwo/IFFParser.js'\nimport { UV1 } from '../_polyfill/uv1.ts'\n\nlet _lwoTree\n\nclass LWOLoader extends Loader {\n  constructor(manager, parameters = {}) {\n    super(manager)\n\n    this.resourcePath = parameters.resourcePath !== undefined ? parameters.resourcePath : ''\n  }\n\n  load(url, onLoad, onProgress, onError) {\n    const scope = this\n\n    const path = scope.path === '' ? extractParentUrl(url, 'Objects') : scope.path\n\n    // give the mesh a default name based on the filename\n    const modelName = url.split(path).pop().split('.')[0]\n\n    const loader = new FileLoader(this.manager)\n    loader.setPath(scope.path)\n    loader.setResponseType('arraybuffer')\n\n    loader.load(\n      url,\n      function (buffer) {\n        // console.time( 'Total parsing: ' );\n\n        try {\n          onLoad(scope.parse(buffer, path, modelName))\n        } catch (e) {\n          if (onError) {\n            onError(e)\n          } else {\n            console.error(e)\n          }\n\n          scope.manager.itemError(url)\n        }\n\n        // console.timeEnd( 'Total parsing: ' );\n      },\n      onProgress,\n      onError,\n    )\n  }\n\n  parse(iffBuffer, path, modelName) {\n    _lwoTree = new IFFParser().parse(iffBuffer)\n\n    // console.log( 'lwoTree', lwoTree );\n\n    const textureLoader = new TextureLoader(this.manager)\n      .setPath(this.resourcePath || path)\n      .setCrossOrigin(this.crossOrigin)\n\n    return new LWOTreeParser(textureLoader).parse(modelName)\n  }\n}\n\n// Parse the lwoTree object\nclass LWOTreeParser {\n  constructor(textureLoader) {\n    this.textureLoader = textureLoader\n  }\n\n  parse(modelName) {\n    this.materials = new MaterialParser(this.textureLoader).parse()\n    this.defaultLayerName = modelName\n\n    this.meshes = this.parseLayers()\n\n    return {\n      materials: this.materials,\n      meshes: this.meshes,\n    }\n  }\n\n  parseLayers() {\n    // array of all meshes for building hierarchy\n    const meshes = []\n\n    // final array containing meshes with scene graph hierarchy set up\n    const finalMeshes = []\n\n    const geometryParser = new GeometryParser()\n\n    const scope = this\n    _lwoTree.layers.forEach(function (layer) {\n      const geometry = geometryParser.parse(layer.geometry, layer)\n\n      const mesh = scope.parseMesh(geometry, layer)\n\n      meshes[layer.number] = mesh\n\n      if (layer.parent === -1) finalMeshes.push(mesh)\n      else meshes[layer.parent].add(mesh)\n    })\n\n    this.applyPivots(finalMeshes)\n\n    return finalMeshes\n  }\n\n  parseMesh(geometry, layer) {\n    let mesh\n\n    const materials = this.getMaterials(geometry.userData.matNames, layer.geometry.type)\n\n    if (UV1 === 'uv2') this.duplicateUVs(geometry, materials)\n\n    if (layer.geometry.type === 'points') mesh = new Points(geometry, materials)\n    else if (layer.geometry.type === 'lines') mesh = new LineSegments(geometry, materials)\n    else mesh = new Mesh(geometry, materials)\n\n    if (layer.name) mesh.name = layer.name\n    else mesh.name = this.defaultLayerName + '_layer_' + layer.number\n\n    mesh.userData.pivot = layer.pivot\n\n    return mesh\n  }\n\n  // TODO: may need to be reversed in z to convert LWO to three.js coordinates\n  applyPivots(meshes) {\n    meshes.forEach(function (mesh) {\n      mesh.traverse(function (child) {\n        const pivot = child.userData.pivot\n\n        child.position.x += pivot[0]\n        child.position.y += pivot[1]\n        child.position.z += pivot[2]\n\n        if (child.parent) {\n          const parentPivot = child.parent.userData.pivot\n\n          child.position.x -= parentPivot[0]\n          child.position.y -= parentPivot[1]\n          child.position.z -= parentPivot[2]\n        }\n      })\n    })\n  }\n\n  getMaterials(namesArray, type) {\n    const materials = []\n\n    const scope = this\n\n    namesArray.forEach(function (name, i) {\n      materials[i] = scope.getMaterialByName(name)\n    })\n\n    // convert materials to line or point mats if required\n    if (type === 'points' || type === 'lines') {\n      materials.forEach(function (mat, i) {\n        const spec = {\n          color: mat.color,\n        }\n\n        if (type === 'points') {\n          spec.size = 0.1\n          spec.map = mat.map\n          spec.morphTargets = mat.morphTargets\n          materials[i] = new PointsMaterial(spec)\n        } else if (type === 'lines') {\n          materials[i] = new LineBasicMaterial(spec)\n        }\n      })\n    }\n\n    // if there is only one material, return that directly instead of array\n    const filtered = materials.filter(Boolean)\n    if (filtered.length === 1) return filtered[0]\n\n    return materials\n  }\n\n  getMaterialByName(name) {\n    return this.materials.filter(function (m) {\n      return m.name === name\n    })[0]\n  }\n\n  // If the material has an aoMap, duplicate UVs\n  duplicateUVs(geometry, materials) {\n    let duplicateUVs = false\n\n    if (!Array.isArray(materials)) {\n      if (materials.aoMap) duplicateUVs = true\n    } else {\n      materials.forEach(function (material) {\n        if (material.aoMap) duplicateUVs = true\n      })\n    }\n\n    if (!duplicateUVs) return\n\n    geometry.setAttribute('uv2', new BufferAttribute(geometry.attributes.uv.array, 2))\n  }\n}\n\nclass MaterialParser {\n  constructor(textureLoader) {\n    this.textureLoader = textureLoader\n  }\n\n  parse() {\n    const materials = []\n    this.textures = {}\n\n    for (const name in _lwoTree.materials) {\n      if (_lwoTree.format === 'LWO3') {\n        materials.push(this.parseMaterial(_lwoTree.materials[name], name, _lwoTree.textures))\n      } else if (_lwoTree.format === 'LWO2') {\n        materials.push(this.parseMaterialLwo2(_lwoTree.materials[name], name, _lwoTree.textures))\n      }\n    }\n\n    return materials\n  }\n\n  parseMaterial(materialData, name, textures) {\n    let params = {\n      name: name,\n      side: this.getSide(materialData.attributes),\n      flatShading: this.getSmooth(materialData.attributes),\n    }\n\n    const connections = this.parseConnections(materialData.connections, materialData.nodes)\n\n    const maps = this.parseTextureNodes(connections.maps)\n\n    this.parseAttributeImageMaps(connections.attributes, textures, maps, materialData.maps)\n\n    const attributes = this.parseAttributes(connections.attributes, maps)\n\n    this.parseEnvMap(connections, maps, attributes)\n\n    params = Object.assign(maps, params)\n    params = Object.assign(params, attributes)\n\n    const materialType = this.getMaterialType(connections.attributes)\n\n    return new materialType(params)\n  }\n\n  parseMaterialLwo2(materialData, name /*, textures*/) {\n    let params = {\n      name: name,\n      side: this.getSide(materialData.attributes),\n      flatShading: this.getSmooth(materialData.attributes),\n    }\n\n    const attributes = this.parseAttributes(materialData.attributes, {})\n    params = Object.assign(params, attributes)\n    return new MeshPhongMaterial(params)\n  }\n\n  // Note: converting from left to right handed coords by switching x -> -x in vertices, and\n  // then switching mat FrontSide -> BackSide\n  // NB: this means that FrontSide and BackSide have been switched!\n  getSide(attributes) {\n    if (!attributes.side) return BackSide\n\n    switch (attributes.side) {\n      case 0:\n      case 1:\n        return BackSide\n      case 2:\n        return FrontSide\n      case 3:\n        return DoubleSide\n    }\n  }\n\n  getSmooth(attributes) {\n    if (!attributes.smooth) return true\n    return !attributes.smooth\n  }\n\n  parseConnections(connections, nodes) {\n    const materialConnections = {\n      maps: {},\n    }\n\n    const inputName = connections.inputName\n    const inputNodeName = connections.inputNodeName\n    const nodeName = connections.nodeName\n\n    const scope = this\n    inputName.forEach(function (name, index) {\n      if (name === 'Material') {\n        const matNode = scope.getNodeByRefName(inputNodeName[index], nodes)\n        materialConnections.attributes = matNode.attributes\n        materialConnections.envMap = matNode.fileName\n        materialConnections.name = inputNodeName[index]\n      }\n    })\n\n    nodeName.forEach(function (name, index) {\n      if (name === materialConnections.name) {\n        materialConnections.maps[inputName[index]] = scope.getNodeByRefName(inputNodeName[index], nodes)\n      }\n    })\n\n    return materialConnections\n  }\n\n  getNodeByRefName(refName, nodes) {\n    for (const name in nodes) {\n      if (nodes[name].refName === refName) return nodes[name]\n    }\n  }\n\n  parseTextureNodes(textureNodes) {\n    const maps = {}\n\n    for (const name in textureNodes) {\n      const node = textureNodes[name]\n      const path = node.fileName\n\n      if (!path) return\n\n      const texture = this.loadTexture(path)\n\n      if (node.widthWrappingMode !== undefined) texture.wrapS = this.getWrappingType(node.widthWrappingMode)\n      if (node.heightWrappingMode !== undefined) texture.wrapT = this.getWrappingType(node.heightWrappingMode)\n\n      switch (name) {\n        case 'Color':\n          maps.map = texture\n          break\n        case 'Roughness':\n          maps.roughnessMap = texture\n          maps.roughness = 0.5\n          break\n        case 'Specular':\n          maps.specularMap = texture\n          maps.specular = 0xffffff\n          break\n        case 'Luminous':\n          maps.emissiveMap = texture\n          maps.emissive = 0x808080\n          break\n        case 'Luminous Color':\n          maps.emissive = 0x808080\n          break\n        case 'Metallic':\n          maps.metalnessMap = texture\n          maps.metalness = 0.5\n          break\n        case 'Transparency':\n        case 'Alpha':\n          maps.alphaMap = texture\n          maps.transparent = true\n          break\n        case 'Normal':\n          maps.normalMap = texture\n          if (node.amplitude !== undefined) maps.normalScale = new Vector2(node.amplitude, node.amplitude)\n          break\n        case 'Bump':\n          maps.bumpMap = texture\n          break\n      }\n    }\n\n    // LWO BSDF materials can have both spec and rough, but this is not valid in three\n    if (maps.roughnessMap && maps.specularMap) delete maps.specularMap\n\n    return maps\n  }\n\n  // maps can also be defined on individual material attributes, parse those here\n  // This occurs on Standard (Phong) surfaces\n  parseAttributeImageMaps(attributes, textures, maps) {\n    for (const name in attributes) {\n      const attribute = attributes[name]\n\n      if (attribute.maps) {\n        const mapData = attribute.maps[0]\n\n        const path = this.getTexturePathByIndex(mapData.imageIndex, textures)\n        if (!path) return\n\n        const texture = this.loadTexture(path)\n\n        if (mapData.wrap !== undefined) texture.wrapS = this.getWrappingType(mapData.wrap.w)\n        if (mapData.wrap !== undefined) texture.wrapT = this.getWrappingType(mapData.wrap.h)\n\n        switch (name) {\n          case 'Color':\n            maps.map = texture\n            break\n          case 'Diffuse':\n            maps.aoMap = texture\n            break\n          case 'Roughness':\n            maps.roughnessMap = texture\n            maps.roughness = 1\n            break\n          case 'Specular':\n            maps.specularMap = texture\n            maps.specular = 0xffffff\n            break\n          case 'Luminosity':\n            maps.emissiveMap = texture\n            maps.emissive = 0x808080\n            break\n          case 'Metallic':\n            maps.metalnessMap = texture\n            maps.metalness = 1\n            break\n          case 'Transparency':\n          case 'Alpha':\n            maps.alphaMap = texture\n            maps.transparent = true\n            break\n          case 'Normal':\n            maps.normalMap = texture\n            break\n          case 'Bump':\n            maps.bumpMap = texture\n            break\n        }\n      }\n    }\n  }\n\n  parseAttributes(attributes, maps) {\n    const params = {}\n\n    // don't use color data if color map is present\n    if (attributes.Color && !maps.map) {\n      params.color = new Color().fromArray(attributes.Color.value)\n    } else {\n      params.color = new Color()\n    }\n\n    if (attributes.Transparency && attributes.Transparency.value !== 0) {\n      params.opacity = 1 - attributes.Transparency.value\n      params.transparent = true\n    }\n\n    if (attributes['Bump Height']) params.bumpScale = attributes['Bump Height'].value * 0.1\n\n    if (attributes['Refraction Index']) params.refractionRatio = 1 / attributes['Refraction Index'].value\n\n    this.parsePhysicalAttributes(params, attributes, maps)\n    this.parseStandardAttributes(params, attributes, maps)\n    this.parsePhongAttributes(params, attributes, maps)\n\n    return params\n  }\n\n  parsePhysicalAttributes(params, attributes /*, maps*/) {\n    if (attributes.Clearcoat && attributes.Clearcoat.value > 0) {\n      params.clearcoat = attributes.Clearcoat.value\n\n      if (attributes['Clearcoat Gloss']) {\n        params.clearcoatRoughness = 0.5 * (1 - attributes['Clearcoat Gloss'].value)\n      }\n    }\n  }\n\n  parseStandardAttributes(params, attributes, maps) {\n    if (attributes.Luminous) {\n      params.emissiveIntensity = attributes.Luminous.value\n\n      if (attributes['Luminous Color'] && !maps.emissive) {\n        params.emissive = new Color().fromArray(attributes['Luminous Color'].value)\n      } else {\n        params.emissive = new Color(0x808080)\n      }\n    }\n\n    if (attributes.Roughness && !maps.roughnessMap) params.roughness = attributes.Roughness.value\n    if (attributes.Metallic && !maps.metalnessMap) params.metalness = attributes.Metallic.value\n  }\n\n  parsePhongAttributes(params, attributes, maps) {\n    if (attributes.Diffuse) params.color.multiplyScalar(attributes.Diffuse.value)\n\n    if (attributes.Reflection) {\n      params.reflectivity = attributes.Reflection.value\n      params.combine = AddOperation\n    }\n\n    if (attributes.Luminosity) {\n      params.emissiveIntensity = attributes.Luminosity.value\n\n      if (!maps.emissiveMap && !maps.map) {\n        params.emissive = params.color\n      } else {\n        params.emissive = new Color(0x808080)\n      }\n    }\n\n    // parse specular if there is no roughness - we will interpret the material as 'Phong' in this case\n    if (!attributes.Roughness && attributes.Specular && !maps.specularMap) {\n      if (attributes['Color Highlight']) {\n        params.specular = new Color()\n          .setScalar(attributes.Specular.value)\n          .lerp(params.color.clone().multiplyScalar(attributes.Specular.value), attributes['Color Highlight'].value)\n      } else {\n        params.specular = new Color().setScalar(attributes.Specular.value)\n      }\n    }\n\n    if (params.specular && attributes.Glossiness) {\n      params.shininess = 7 + Math.pow(2, attributes.Glossiness.value * 12 + 2)\n    }\n  }\n\n  parseEnvMap(connections, maps, attributes) {\n    if (connections.envMap) {\n      const envMap = this.loadTexture(connections.envMap)\n\n      if (attributes.transparent && attributes.opacity < 0.999) {\n        envMap.mapping = EquirectangularRefractionMapping\n\n        // Reflectivity and refraction mapping don't work well together in Phong materials\n        if (attributes.reflectivity !== undefined) {\n          delete attributes.reflectivity\n          delete attributes.combine\n        }\n\n        if (attributes.metalness !== undefined) {\n          delete attributes.metalness\n        }\n      } else {\n        envMap.mapping = EquirectangularReflectionMapping\n      }\n\n      maps.envMap = envMap\n    }\n  }\n\n  // get texture defined at top level by its index\n  getTexturePathByIndex(index) {\n    let fileName = ''\n\n    if (!_lwoTree.textures) return fileName\n\n    _lwoTree.textures.forEach(function (texture) {\n      if (texture.index === index) fileName = texture.fileName\n    })\n\n    return fileName\n  }\n\n  loadTexture(path) {\n    if (!path) return null\n\n    const texture = this.textureLoader.load(path, undefined, undefined, function () {\n      console.warn(\n        'LWOLoader: non-standard resource hierarchy. Use `resourcePath` parameter to specify root content directory.',\n      )\n    })\n\n    return texture\n  }\n\n  // 0 = Reset, 1 = Repeat, 2 = Mirror, 3 = Edge\n  getWrappingType(num) {\n    switch (num) {\n      case 0:\n        console.warn('LWOLoader: \"Reset\" texture wrapping type is not supported in three.js')\n        return ClampToEdgeWrapping\n      case 1:\n        return RepeatWrapping\n      case 2:\n        return MirroredRepeatWrapping\n      case 3:\n        return ClampToEdgeWrapping\n    }\n  }\n\n  getMaterialType(nodeData) {\n    if (nodeData.Clearcoat && nodeData.Clearcoat.value > 0) return MeshPhysicalMaterial\n    if (nodeData.Roughness) return MeshStandardMaterial\n    return MeshPhongMaterial\n  }\n}\n\nclass GeometryParser {\n  parse(geoData, layer) {\n    const geometry = new BufferGeometry()\n\n    geometry.setAttribute('position', new Float32BufferAttribute(geoData.points, 3))\n\n    const indices = this.splitIndices(geoData.vertexIndices, geoData.polygonDimensions)\n    geometry.setIndex(indices)\n\n    this.parseGroups(geometry, geoData)\n\n    geometry.computeVertexNormals()\n\n    this.parseUVs(geometry, layer, indices)\n    this.parseMorphTargets(geometry, layer, indices)\n\n    // TODO: z may need to be reversed to account for coordinate system change\n    geometry.translate(-layer.pivot[0], -layer.pivot[1], -layer.pivot[2])\n\n    // let userData = geometry.userData;\n    // geometry = geometry.toNonIndexed()\n    // geometry.userData = userData;\n\n    return geometry\n  }\n\n  // split quads into tris\n  splitIndices(indices, polygonDimensions) {\n    const remappedIndices = []\n\n    let i = 0\n    polygonDimensions.forEach(function (dim) {\n      if (dim < 4) {\n        for (let k = 0; k < dim; k++) remappedIndices.push(indices[i + k])\n      } else if (dim === 4) {\n        remappedIndices.push(\n          indices[i],\n          indices[i + 1],\n          indices[i + 2],\n\n          indices[i],\n          indices[i + 2],\n          indices[i + 3],\n        )\n      } else if (dim > 4) {\n        for (let k = 1; k < dim - 1; k++) {\n          remappedIndices.push(indices[i], indices[i + k], indices[i + k + 1])\n        }\n\n        console.warn('LWOLoader: polygons with greater than 4 sides are not supported')\n      }\n\n      i += dim\n    })\n\n    return remappedIndices\n  }\n\n  // NOTE: currently ignoring poly indices and assuming that they are intelligently ordered\n  parseGroups(geometry, geoData) {\n    const tags = _lwoTree.tags\n    const matNames = []\n\n    let elemSize = 3\n    if (geoData.type === 'lines') elemSize = 2\n    if (geoData.type === 'points') elemSize = 1\n\n    const remappedIndices = this.splitMaterialIndices(geoData.polygonDimensions, geoData.materialIndices)\n\n    let indexNum = 0 // create new indices in numerical order\n    const indexPairs = {} // original indices mapped to numerical indices\n\n    let prevMaterialIndex\n    let materialIndex\n\n    let prevStart = 0\n    let currentCount = 0\n\n    for (let i = 0; i < remappedIndices.length; i += 2) {\n      materialIndex = remappedIndices[i + 1]\n\n      if (i === 0) matNames[indexNum] = tags[materialIndex]\n\n      if (prevMaterialIndex === undefined) prevMaterialIndex = materialIndex\n\n      if (materialIndex !== prevMaterialIndex) {\n        let currentIndex\n        if (indexPairs[tags[prevMaterialIndex]]) {\n          currentIndex = indexPairs[tags[prevMaterialIndex]]\n        } else {\n          currentIndex = indexNum\n          indexPairs[tags[prevMaterialIndex]] = indexNum\n          matNames[indexNum] = tags[prevMaterialIndex]\n          indexNum++\n        }\n\n        geometry.addGroup(prevStart, currentCount, currentIndex)\n\n        prevStart += currentCount\n\n        prevMaterialIndex = materialIndex\n        currentCount = 0\n      }\n\n      currentCount += elemSize\n    }\n\n    // the loop above doesn't add the last group, do that here.\n    if (geometry.groups.length > 0) {\n      let currentIndex\n      if (indexPairs[tags[materialIndex]]) {\n        currentIndex = indexPairs[tags[materialIndex]]\n      } else {\n        currentIndex = indexNum\n        indexPairs[tags[materialIndex]] = indexNum\n        matNames[indexNum] = tags[materialIndex]\n      }\n\n      geometry.addGroup(prevStart, currentCount, currentIndex)\n    }\n\n    // Mat names from TAGS chunk, used to build up an array of materials for this geometry\n    geometry.userData.matNames = matNames\n  }\n\n  splitMaterialIndices(polygonDimensions, indices) {\n    const remappedIndices = []\n\n    polygonDimensions.forEach(function (dim, i) {\n      if (dim <= 3) {\n        remappedIndices.push(indices[i * 2], indices[i * 2 + 1])\n      } else if (dim === 4) {\n        remappedIndices.push(indices[i * 2], indices[i * 2 + 1], indices[i * 2], indices[i * 2 + 1])\n      } else {\n        // ignore > 4 for now\n        for (let k = 0; k < dim - 2; k++) {\n          remappedIndices.push(indices[i * 2], indices[i * 2 + 1])\n        }\n      }\n    })\n\n    return remappedIndices\n  }\n\n  // UV maps:\n  // 1: are defined via index into an array of points, not into a geometry\n  // - the geometry is also defined by an index into this array, but the indexes may not match\n  // 2: there can be any number of UV maps for a single geometry. Here these are combined,\n  // \twith preference given to the first map encountered\n  // 3: UV maps can be partial - that is, defined for only a part of the geometry\n  // 4: UV maps can be VMAP or VMAD (discontinuous, to allow for seams). In practice, most\n  // UV maps are defined as partially VMAP and partially VMAD\n  // VMADs are currently not supported\n  parseUVs(geometry, layer) {\n    // start by creating a UV map set to zero for the whole geometry\n    const remappedUVs = Array.from(Array(geometry.attributes.position.count * 2), function () {\n      return 0\n    })\n\n    for (const name in layer.uvs) {\n      const uvs = layer.uvs[name].uvs\n      const uvIndices = layer.uvs[name].uvIndices\n\n      uvIndices.forEach(function (i, j) {\n        remappedUVs[i * 2] = uvs[j * 2]\n        remappedUVs[i * 2 + 1] = uvs[j * 2 + 1]\n      })\n    }\n\n    geometry.setAttribute('uv', new Float32BufferAttribute(remappedUVs, 2))\n  }\n\n  parseMorphTargets(geometry, layer) {\n    let num = 0\n    for (const name in layer.morphTargets) {\n      const remappedPoints = geometry.attributes.position.array.slice()\n\n      if (!geometry.morphAttributes.position) geometry.morphAttributes.position = []\n\n      const morphPoints = layer.morphTargets[name].points\n      const morphIndices = layer.morphTargets[name].indices\n      const type = layer.morphTargets[name].type\n\n      morphIndices.forEach(function (i, j) {\n        if (type === 'relative') {\n          remappedPoints[i * 3] += morphPoints[j * 3]\n          remappedPoints[i * 3 + 1] += morphPoints[j * 3 + 1]\n          remappedPoints[i * 3 + 2] += morphPoints[j * 3 + 2]\n        } else {\n          remappedPoints[i * 3] = morphPoints[j * 3]\n          remappedPoints[i * 3 + 1] = morphPoints[j * 3 + 1]\n          remappedPoints[i * 3 + 2] = morphPoints[j * 3 + 2]\n        }\n      })\n\n      geometry.morphAttributes.position[num] = new Float32BufferAttribute(remappedPoints, 3)\n      geometry.morphAttributes.position[num].name = name\n\n      num++\n    }\n\n    geometry.morphTargetsRelative = false\n  }\n}\n\n// ************** UTILITY FUNCTIONS **************\n\nfunction extractParentUrl(url, dir) {\n  const index = url.indexOf(dir)\n\n  if (index === -1) return './'\n\n  return url.substr(0, index)\n}\n\nexport { LWOLoader 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