import { Loader, LoaderUtils, FileLoader, TextureLoader, RepeatWrapping, ClampToEdgeWrapping, Texture, MeshPhongMaterial, MeshLambertMaterial, Color, EquirectangularReflectionMapping, Matrix4, Group, Bone, PropertyBinding, Object3D, OrthographicCamera, PerspectiveCamera, PointLight, MathUtils, SpotLight, DirectionalLight, SkinnedMesh, Mesh, LineBasicMaterial, Line, Vector3, Skeleton, AmbientLight, BufferGeometry, Float32BufferAttribute, Uint16BufferAttribute, Matrix3, Vector4, AnimationClip, Quaternion, Euler, VectorKeyframeTrack, QuaternionKeyframeTrack, NumberKeyframeTrack } from "three";
import { unzlibSync } from "fflate";
import { NURBSCurve } from "../curves/NURBSCurve.js";
import { decodeText } from "../_polyfill/LoaderUtils.js";
import { UV1 } from "../_polyfill/uv1.js";
let fbxTree;
let connections;
let sceneGraph;
class FBXLoader extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = scope.path === "" ? LoaderUtils.extractUrlBase(url) : scope.path;
    const loader = new FileLoader(this.manager);
    loader.setPath(scope.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(scope.requestHeader);
    loader.setWithCredentials(scope.withCredentials);
    loader.load(
      url,
      function(buffer) {
        try {
          onLoad(scope.parse(buffer, path));
        } catch (e) {
          if (onError) {
            onError(e);
          } else {
            console.error(e);
          }
          scope.manager.itemError(url);
        }
      },
      onProgress,
      onError
    );
  }
  parse(FBXBuffer, path) {
    if (isFbxFormatBinary(FBXBuffer)) {
      fbxTree = new BinaryParser().parse(FBXBuffer);
    } else {
      const FBXText = convertArrayBufferToString(FBXBuffer);
      if (!isFbxFormatASCII(FBXText)) {
        throw new Error("THREE.FBXLoader: Unknown format.");
      }
      if (getFbxVersion(FBXText) < 7e3) {
        throw new Error("THREE.FBXLoader: FBX version not supported, FileVersion: " + getFbxVersion(FBXText));
      }
      fbxTree = new TextParser().parse(FBXText);
    }
    const textureLoader = new TextureLoader(this.manager).setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
    return new FBXTreeParser(textureLoader, this.manager).parse(fbxTree);
  }
}
class FBXTreeParser {
  constructor(textureLoader, manager) {
    this.textureLoader = textureLoader;
    this.manager = manager;
  }
  parse() {
    connections = this.parseConnections();
    const images = this.parseImages();
    const textures = this.parseTextures(images);
    const materials = this.parseMaterials(textures);
    const deformers = this.parseDeformers();
    const geometryMap = new GeometryParser().parse(deformers);
    this.parseScene(deformers, geometryMap, materials);
    return sceneGraph;
  }
  // Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
  // and details the connection type
  parseConnections() {
    const connectionMap = /* @__PURE__ */ new Map();
    if ("Connections" in fbxTree) {
      const rawConnections = fbxTree.Connections.connections;
      rawConnections.forEach(function(rawConnection) {
        const fromID = rawConnection[0];
        const toID = rawConnection[1];
        const relationship = rawConnection[2];
        if (!connectionMap.has(fromID)) {
          connectionMap.set(fromID, {
            parents: [],
            children: []
          });
        }
        const parentRelationship = { ID: toID, relationship };
        connectionMap.get(fromID).parents.push(parentRelationship);
        if (!connectionMap.has(toID)) {
          connectionMap.set(toID, {
            parents: [],
            children: []
          });
        }
        const childRelationship = { ID: fromID, relationship };
        connectionMap.get(toID).children.push(childRelationship);
      });
    }
    return connectionMap;
  }
  // Parse FBXTree.Objects.Video for embedded image data
  // These images are connected to textures in FBXTree.Objects.Textures
  // via FBXTree.Connections.
  parseImages() {
    const images = {};
    const blobs = {};
    if ("Video" in fbxTree.Objects) {
      const videoNodes = fbxTree.Objects.Video;
      for (const nodeID in videoNodes) {
        const videoNode = videoNodes[nodeID];
        const id = parseInt(nodeID);
        images[id] = videoNode.RelativeFilename || videoNode.Filename;
        if ("Content" in videoNode) {
          const arrayBufferContent = videoNode.Content instanceof ArrayBuffer && videoNode.Content.byteLength > 0;
          const base64Content = typeof videoNode.Content === "string" && videoNode.Content !== "";
          if (arrayBufferContent || base64Content) {
            const image = this.parseImage(videoNodes[nodeID]);
            blobs[videoNode.RelativeFilename || videoNode.Filename] = image;
          }
        }
      }
    }
    for (const id in images) {
      const filename = images[id];
      if (blobs[filename] !== void 0)
        images[id] = blobs[filename];
      else
        images[id] = images[id].split("\\").pop();
    }
    return images;
  }
  // Parse embedded image data in FBXTree.Video.Content
  parseImage(videoNode) {
    const content = videoNode.Content;
    const fileName = videoNode.RelativeFilename || videoNode.Filename;
    const extension = fileName.slice(fileName.lastIndexOf(".") + 1).toLowerCase();
    let type;
    switch (extension) {
      case "bmp":
        type = "image/bmp";
        break;
      case "jpg":
      case "jpeg":
        type = "image/jpeg";
        break;
      case "png":
        type = "image/png";
        break;
      case "tif":
        type = "image/tiff";
        break;
      case "tga":
        if (this.manager.getHandler(".tga") === null) {
          console.warn("FBXLoader: TGA loader not found, skipping ", fileName);
        }
        type = "image/tga";
        break;
      default:
        console.warn('FBXLoader: Image type "' + extension + '" is not supported.');
        return;
    }
    if (typeof content === "string") {
      return "data:" + type + ";base64," + content;
    } else {
      const array = new Uint8Array(content);
      return window.URL.createObjectURL(new Blob([array], { type }));
    }
  }
  // Parse nodes in FBXTree.Objects.Texture
  // These contain details such as UV scaling, cropping, rotation etc and are connected
  // to images in FBXTree.Objects.Video
  parseTextures(images) {
    const textureMap = /* @__PURE__ */ new Map();
    if ("Texture" in fbxTree.Objects) {
      const textureNodes = fbxTree.Objects.Texture;
      for (const nodeID in textureNodes) {
        const texture = this.parseTexture(textureNodes[nodeID], images);
        textureMap.set(parseInt(nodeID), texture);
      }
    }
    return textureMap;
  }
  // Parse individual node in FBXTree.Objects.Texture
  parseTexture(textureNode, images) {
    const texture = this.loadTexture(textureNode, images);
    texture.ID = textureNode.id;
    texture.name = textureNode.attrName;
    const wrapModeU = textureNode.WrapModeU;
    const wrapModeV = textureNode.WrapModeV;
    const valueU = wrapModeU !== void 0 ? wrapModeU.value : 0;
    const valueV = wrapModeV !== void 0 ? wrapModeV.value : 0;
    texture.wrapS = valueU === 0 ? RepeatWrapping : ClampToEdgeWrapping;
    texture.wrapT = valueV === 0 ? RepeatWrapping : ClampToEdgeWrapping;
    if ("Scaling" in textureNode) {
      const values = textureNode.Scaling.value;
      texture.repeat.x = values[0];
      texture.repeat.y = values[1];
    }
    return texture;
  }
  // load a texture specified as a blob or data URI, or via an external URL using TextureLoader
  loadTexture(textureNode, images) {
    let fileName;
    const currentPath = this.textureLoader.path;
    const children = connections.get(textureNode.id).children;
    if (children !== void 0 && children.length > 0 && images[children[0].ID] !== void 0) {
      fileName = images[children[0].ID];
      if (fileName.indexOf("blob:") === 0 || fileName.indexOf("data:") === 0) {
        this.textureLoader.setPath(void 0);
      }
    }
    let texture;
    const extension = textureNode.FileName.slice(-3).toLowerCase();
    if (extension === "tga") {
      const loader = this.manager.getHandler(".tga");
      if (loader === null) {
        console.warn("FBXLoader: TGA loader not found, creating placeholder texture for", textureNode.RelativeFilename);
        texture = new Texture();
      } else {
        loader.setPath(this.textureLoader.path);
        texture = loader.load(fileName);
      }
    } else if (extension === "psd") {
      console.warn(
        "FBXLoader: PSD textures are not supported, creating placeholder texture for",
        textureNode.RelativeFilename
      );
      texture = new Texture();
    } else {
      texture = this.textureLoader.load(fileName);
    }
    this.textureLoader.setPath(currentPath);
    return texture;
  }
  // Parse nodes in FBXTree.Objects.Material
  parseMaterials(textureMap) {
    const materialMap = /* @__PURE__ */ new Map();
    if ("Material" in fbxTree.Objects) {
      const materialNodes = fbxTree.Objects.Material;
      for (const nodeID in materialNodes) {
        const material = this.parseMaterial(materialNodes[nodeID], textureMap);
        if (material !== null)
          materialMap.set(parseInt(nodeID), material);
      }
    }
    return materialMap;
  }
  // Parse single node in FBXTree.Objects.Material
  // Materials are connected to texture maps in FBXTree.Objects.Textures
  // FBX format currently only supports Lambert and Phong shading models
  parseMaterial(materialNode, textureMap) {
    const ID = materialNode.id;
    const name = materialNode.attrName;
    let type = materialNode.ShadingModel;
    if (typeof type === "object") {
      type = type.value;
    }
    if (!connections.has(ID))
      return null;
    const parameters = this.parseParameters(materialNode, textureMap, ID);
    let material;
    switch (type.toLowerCase()) {
      case "phong":
        material = new MeshPhongMaterial();
        break;
      case "lambert":
        material = new MeshLambertMaterial();
        break;
      default:
        console.warn('THREE.FBXLoader: unknown material type "%s". Defaulting to MeshPhongMaterial.', type);
        material = new MeshPhongMaterial();
        break;
    }
    material.setValues(parameters);
    material.name = name;
    return material;
  }
  // Parse FBX material and return parameters suitable for a three.js material
  // Also parse the texture map and return any textures associated with the material
  parseParameters(materialNode, textureMap, ID) {
    const parameters = {};
    if (materialNode.BumpFactor) {
      parameters.bumpScale = materialNode.BumpFactor.value;
    }
    if (materialNode.Diffuse) {
      parameters.color = new Color().fromArray(materialNode.Diffuse.value);
    } else if (materialNode.DiffuseColor && (materialNode.DiffuseColor.type === "Color" || materialNode.DiffuseColor.type === "ColorRGB")) {
      parameters.color = new Color().fromArray(materialNode.DiffuseColor.value);
    }
    if (materialNode.DisplacementFactor) {
      parameters.displacementScale = materialNode.DisplacementFactor.value;
    }
    if (materialNode.Emissive) {
      parameters.emissive = new Color().fromArray(materialNode.Emissive.value);
    } else if (materialNode.EmissiveColor && (materialNode.EmissiveColor.type === "Color" || materialNode.EmissiveColor.type === "ColorRGB")) {
      parameters.emissive = new Color().fromArray(materialNode.EmissiveColor.value);
    }
    if (materialNode.EmissiveFactor) {
      parameters.emissiveIntensity = parseFloat(materialNode.EmissiveFactor.value);
    }
    if (materialNode.Opacity) {
      parameters.opacity = parseFloat(materialNode.Opacity.value);
    }
    if (parameters.opacity < 1) {
      parameters.transparent = true;
    }
    if (materialNode.ReflectionFactor) {
      parameters.reflectivity = materialNode.ReflectionFactor.value;
    }
    if (materialNode.Shininess) {
      parameters.shininess = materialNode.Shininess.value;
    }
    if (materialNode.Specular) {
      parameters.specular = new Color().fromArray(materialNode.Specular.value);
    } else if (materialNode.SpecularColor && materialNode.SpecularColor.type === "Color") {
      parameters.specular = new Color().fromArray(materialNode.SpecularColor.value);
    }
    const scope = this;
    connections.get(ID).children.forEach(function(child) {
      const type = child.relationship;
      switch (type) {
        case "Bump":
          parameters.bumpMap = scope.getTexture(textureMap, child.ID);
          break;
        case "Maya|TEX_ao_map":
          parameters.aoMap = scope.getTexture(textureMap, child.ID);
          break;
        case "DiffuseColor":
        case "Maya|TEX_color_map":
          parameters.map = scope.getTexture(textureMap, child.ID);
          if (parameters.map !== void 0) {
            if ("colorSpace" in parameters.map)
              parameters.map.colorSpace = "srgb";
            else
              parameters.map.encoding = 3001;
          }
          break;
        case "DisplacementColor":
          parameters.displacementMap = scope.getTexture(textureMap, child.ID);
          break;
        case "EmissiveColor":
          parameters.emissiveMap = scope.getTexture(textureMap, child.ID);
          if (parameters.emissiveMap !== void 0) {
            if ("colorSpace" in parameters.emissiveMap)
              parameters.emissiveMap.colorSpace = "srgb";
            else
              parameters.emissiveMap.encoding = 3001;
          }
          break;
        case "NormalMap":
        case "Maya|TEX_normal_map":
          parameters.normalMap = scope.getTexture(textureMap, child.ID);
          break;
        case "ReflectionColor":
          parameters.envMap = scope.getTexture(textureMap, child.ID);
          if (parameters.envMap !== void 0) {
            parameters.envMap.mapping = EquirectangularReflectionMapping;
            if ("colorSpace" in parameters.envMap)
              parameters.envMap.colorSpace = "srgb";
            else
              parameters.envMap.encoding = 3001;
          }
          break;
        case "SpecularColor":
          parameters.specularMap = scope.getTexture(textureMap, child.ID);
          if (parameters.specularMap !== void 0) {
            if ("colorSpace" in parameters.specularMap)
              parameters.specularMap.colorSpace = "srgb";
            else
              parameters.specularMap.encoding = 3001;
          }
          break;
        case "TransparentColor":
        case "TransparencyFactor":
          parameters.alphaMap = scope.getTexture(textureMap, child.ID);
          parameters.transparent = true;
          break;
        case "AmbientColor":
        case "ShininessExponent":
        case "SpecularFactor":
        case "VectorDisplacementColor":
        default:
          console.warn("THREE.FBXLoader: %s map is not supported in three.js, skipping texture.", type);
          break;
      }
    });
    return parameters;
  }
  // get a texture from the textureMap for use by a material.
  getTexture(textureMap, id) {
    if ("LayeredTexture" in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture) {
      console.warn("THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.");
      id = connections.get(id).children[0].ID;
    }
    return textureMap.get(id);
  }
  // Parse nodes in FBXTree.Objects.Deformer
  // Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
  // Generates map of Skeleton-like objects for use later when generating and binding skeletons.
  parseDeformers() {
    const skeletons = {};
    const morphTargets = {};
    if ("Deformer" in fbxTree.Objects) {
      const DeformerNodes = fbxTree.Objects.Deformer;
      for (const nodeID in DeformerNodes) {
        const deformerNode = DeformerNodes[nodeID];
        const relationships = connections.get(parseInt(nodeID));
        if (deformerNode.attrType === "Skin") {
          const skeleton = this.parseSkeleton(relationships, DeformerNodes);
          skeleton.ID = nodeID;
          if (relationships.parents.length > 1) {
            console.warn("THREE.FBXLoader: skeleton attached to more than one geometry is not supported.");
          }
          skeleton.geometryID = relationships.parents[0].ID;
          skeletons[nodeID] = skeleton;
        } else if (deformerNode.attrType === "BlendShape") {
          const morphTarget = {
            id: nodeID
          };
          morphTarget.rawTargets = this.parseMorphTargets(relationships, DeformerNodes);
          morphTarget.id = nodeID;
          if (relationships.parents.length > 1) {
            console.warn("THREE.FBXLoader: morph target attached to more than one geometry is not supported.");
          }
          morphTargets[nodeID] = morphTarget;
        }
      }
    }
    return {
      skeletons,
      morphTargets
    };
  }
  // Parse single nodes in FBXTree.Objects.Deformer
  // The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
  // Each skin node represents a skeleton and each cluster node represents a bone
  parseSkeleton(relationships, deformerNodes) {
    const rawBones = [];
    relationships.children.forEach(function(child) {
      const boneNode = deformerNodes[child.ID];
      if (boneNode.attrType !== "Cluster")
        return;
      const rawBone = {
        ID: child.ID,
        indices: [],
        weights: [],
        transformLink: new Matrix4().fromArray(boneNode.TransformLink.a)
        // transform: new Matrix4().fromArray( boneNode.Transform.a ),
        // linkMode: boneNode.Mode,
      };
      if ("Indexes" in boneNode) {
        rawBone.indices = boneNode.Indexes.a;
        rawBone.weights = boneNode.Weights.a;
      }
      rawBones.push(rawBone);
    });
    return {
      rawBones,
      bones: []
    };
  }
  // The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"
  parseMorphTargets(relationships, deformerNodes) {
    const rawMorphTargets = [];
    for (let i = 0; i < relationships.children.length; i++) {
      const child = relationships.children[i];
      const morphTargetNode = deformerNodes[child.ID];
      const rawMorphTarget = {
        name: morphTargetNode.attrName,
        initialWeight: morphTargetNode.DeformPercent,
        id: morphTargetNode.id,
        fullWeights: morphTargetNode.FullWeights.a
      };
      if (morphTargetNode.attrType !== "BlendShapeChannel")
        return;
      rawMorphTarget.geoID = connections.get(parseInt(child.ID)).children.filter(function(child2) {
        return child2.relationship === void 0;
      })[0].ID;
      rawMorphTargets.push(rawMorphTarget);
    }
    return rawMorphTargets;
  }
  // create the main Group() to be returned by the loader
  parseScene(deformers, geometryMap, materialMap) {
    sceneGraph = new Group();
    const modelMap = this.parseModels(deformers.skeletons, geometryMap, materialMap);
    const modelNodes = fbxTree.Objects.Model;
    const scope = this;
    modelMap.forEach(function(model) {
      const modelNode = modelNodes[model.ID];
      scope.setLookAtProperties(model, modelNode);
      const parentConnections = connections.get(model.ID).parents;
      parentConnections.forEach(function(connection) {
        const parent = modelMap.get(connection.ID);
        if (parent !== void 0)
          parent.add(model);
      });
      if (model.parent === null) {
        sceneGraph.add(model);
      }
    });
    this.bindSkeleton(deformers.skeletons, geometryMap, modelMap);
    this.createAmbientLight();
    sceneGraph.traverse(function(node) {
      if (node.userData.transformData) {
        if (node.parent) {
          node.userData.transformData.parentMatrix = node.parent.matrix;
          node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;
        }
        const transform = generateTransform(node.userData.transformData);
        node.applyMatrix4(transform);
        node.updateWorldMatrix();
      }
    });
    const animations = new AnimationParser().parse();
    if (sceneGraph.children.length === 1 && sceneGraph.children[0].isGroup) {
      sceneGraph.children[0].animations = animations;
      sceneGraph = sceneGraph.children[0];
    }
    sceneGraph.animations = animations;
  }
  // parse nodes in FBXTree.Objects.Model
  parseModels(skeletons, geometryMap, materialMap) {
    const modelMap = /* @__PURE__ */ new Map();
    const modelNodes = fbxTree.Objects.Model;
    for (const nodeID in modelNodes) {
      const id = parseInt(nodeID);
      const node = modelNodes[nodeID];
      const relationships = connections.get(id);
      let model = this.buildSkeleton(relationships, skeletons, id, node.attrName);
      if (!model) {
        switch (node.attrType) {
          case "Camera":
            model = this.createCamera(relationships);
            break;
          case "Light":
            model = this.createLight(relationships);
            break;
          case "Mesh":
            model = this.createMesh(relationships, geometryMap, materialMap);
            break;
          case "NurbsCurve":
            model = this.createCurve(relationships, geometryMap);
            break;
          case "LimbNode":
          case "Root":
            model = new Bone();
            break;
          case "Null":
          default:
            model = new Group();
            break;
        }
        model.name = node.attrName ? PropertyBinding.sanitizeNodeName(node.attrName) : "";
        model.ID = id;
      }
      this.getTransformData(model, node);
      modelMap.set(id, model);
    }
    return modelMap;
  }
  buildSkeleton(relationships, skeletons, id, name) {
    let bone = null;
    relationships.parents.forEach(function(parent) {
      for (const ID in skeletons) {
        const skeleton = skeletons[ID];
        skeleton.rawBones.forEach(function(rawBone, i) {
          if (rawBone.ID === parent.ID) {
            const subBone = bone;
            bone = new Bone();
            bone.matrixWorld.copy(rawBone.transformLink);
            bone.name = name ? PropertyBinding.sanitizeNodeName(name) : "";
            bone.ID = id;
            skeleton.bones[i] = bone;
            if (subBone !== null) {
              bone.add(subBone);
            }
          }
        });
      }
    });
    return bone;
  }
  // create a PerspectiveCamera or OrthographicCamera
  createCamera(relationships) {
    let model;
    let cameraAttribute;
    relationships.children.forEach(function(child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];
      if (attr !== void 0) {
        cameraAttribute = attr;
      }
    });
    if (cameraAttribute === void 0) {
      model = new Object3D();
    } else {
      let type = 0;
      if (cameraAttribute.CameraProjectionType !== void 0 && cameraAttribute.CameraProjectionType.value === 1) {
        type = 1;
      }
      let nearClippingPlane = 1;
      if (cameraAttribute.NearPlane !== void 0) {
        nearClippingPlane = cameraAttribute.NearPlane.value / 1e3;
      }
      let farClippingPlane = 1e3;
      if (cameraAttribute.FarPlane !== void 0) {
        farClippingPlane = cameraAttribute.FarPlane.value / 1e3;
      }
      let width = window.innerWidth;
      let height = window.innerHeight;
      if (cameraAttribute.AspectWidth !== void 0 && cameraAttribute.AspectHeight !== void 0) {
        width = cameraAttribute.AspectWidth.value;
        height = cameraAttribute.AspectHeight.value;
      }
      const aspect = width / height;
      let fov = 45;
      if (cameraAttribute.FieldOfView !== void 0) {
        fov = cameraAttribute.FieldOfView.value;
      }
      const focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;
      switch (type) {
        case 0:
          model = new PerspectiveCamera(fov, aspect, nearClippingPlane, farClippingPlane);
          if (focalLength !== null)
            model.setFocalLength(focalLength);
          break;
        case 1:
          model = new OrthographicCamera(
            -width / 2,
            width / 2,
            height / 2,
            -height / 2,
            nearClippingPlane,
            farClippingPlane
          );
          break;
        default:
          console.warn("THREE.FBXLoader: Unknown camera type " + type + ".");
          model = new Object3D();
          break;
      }
    }
    return model;
  }
  // Create a DirectionalLight, PointLight or SpotLight
  createLight(relationships) {
    let model;
    let lightAttribute;
    relationships.children.forEach(function(child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];
      if (attr !== void 0) {
        lightAttribute = attr;
      }
    });
    if (lightAttribute === void 0) {
      model = new Object3D();
    } else {
      let type;
      if (lightAttribute.LightType === void 0) {
        type = 0;
      } else {
        type = lightAttribute.LightType.value;
      }
      let color = 16777215;
      if (lightAttribute.Color !== void 0) {
        color = new Color().fromArray(lightAttribute.Color.value);
      }
      let intensity = lightAttribute.Intensity === void 0 ? 1 : lightAttribute.Intensity.value / 100;
      if (lightAttribute.CastLightOnObject !== void 0 && lightAttribute.CastLightOnObject.value === 0) {
        intensity = 0;
      }
      let distance = 0;
      if (lightAttribute.FarAttenuationEnd !== void 0) {
        if (lightAttribute.EnableFarAttenuation !== void 0 && lightAttribute.EnableFarAttenuation.value === 0) {
          distance = 0;
        } else {
          distance = lightAttribute.FarAttenuationEnd.value;
        }
      }
      const decay = 1;
      switch (type) {
        case 0:
          model = new PointLight(color, intensity, distance, decay);
          break;
        case 1:
          model = new DirectionalLight(color, intensity);
          break;
        case 2:
          let angle = Math.PI / 3;
          if (lightAttribute.InnerAngle !== void 0) {
            angle = MathUtils.degToRad(lightAttribute.InnerAngle.value);
          }
          let penumbra = 0;
          if (lightAttribute.OuterAngle !== void 0) {
            penumbra = MathUtils.degToRad(lightAttribute.OuterAngle.value);
            penumbra = Math.max(penumbra, 1);
          }
          model = new SpotLight(color, intensity, distance, angle, penumbra, decay);
          break;
        default:
          console.warn(
            "THREE.FBXLoader: Unknown light type " + lightAttribute.LightType.value + ", defaulting to a PointLight."
          );
          model = new PointLight(color, intensity);
          break;
      }
      if (lightAttribute.CastShadows !== void 0 && lightAttribute.CastShadows.value === 1) {
        model.castShadow = true;
      }
    }
    return model;
  }
  createMesh(relationships, geometryMap, materialMap) {
    let model;
    let geometry = null;
    let material = null;
    const materials = [];
    relationships.children.forEach(function(child) {
      if (geometryMap.has(child.ID)) {
        geometry = geometryMap.get(child.ID);
      }
      if (materialMap.has(child.ID)) {
        materials.push(materialMap.get(child.ID));
      }
    });
    if (materials.length > 1) {
      material = materials;
    } else if (materials.length > 0) {
      material = materials[0];
    } else {
      material = new MeshPhongMaterial({ color: 13421772 });
      materials.push(material);
    }
    if ("color" in geometry.attributes) {
      materials.forEach(function(material2) {
        material2.vertexColors = true;
      });
    }
    if (geometry.FBX_Deformer) {
      model = new SkinnedMesh(geometry, material);
      model.normalizeSkinWeights();
    } else {
      model = new Mesh(geometry, material);
    }
    return model;
  }
  createCurve(relationships, geometryMap) {
    const geometry = relationships.children.reduce(function(geo, child) {
      if (geometryMap.has(child.ID))
        geo = geometryMap.get(child.ID);
      return geo;
    }, null);
    const material = new LineBasicMaterial({ color: 3342591, linewidth: 1 });
    return new Line(geometry, material);
  }
  // parse the model node for transform data
  getTransformData(model, modelNode) {
    const transformData = {};
    if ("InheritType" in modelNode)
      transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ("RotationOrder" in modelNode)
      transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
    else
      transformData.eulerOrder = "ZYX";
    if ("Lcl_Translation" in modelNode)
      transformData.translation = modelNode.Lcl_Translation.value;
    if ("PreRotation" in modelNode)
      transformData.preRotation = modelNode.PreRotation.value;
    if ("Lcl_Rotation" in modelNode)
      transformData.rotation = modelNode.Lcl_Rotation.value;
    if ("PostRotation" in modelNode)
      transformData.postRotation = modelNode.PostRotation.value;
    if ("Lcl_Scaling" in modelNode)
      transformData.scale = modelNode.Lcl_Scaling.value;
    if ("ScalingOffset" in modelNode)
      transformData.scalingOffset = modelNode.ScalingOffset.value;
    if ("ScalingPivot" in modelNode)
      transformData.scalingPivot = modelNode.ScalingPivot.value;
    if ("RotationOffset" in modelNode)
      transformData.rotationOffset = modelNode.RotationOffset.value;
    if ("RotationPivot" in modelNode)
      transformData.rotationPivot = modelNode.RotationPivot.value;
    model.userData.transformData = transformData;
  }
  setLookAtProperties(model, modelNode) {
    if ("LookAtProperty" in modelNode) {
      const children = connections.get(model.ID).children;
      children.forEach(function(child) {
        if (child.relationship === "LookAtProperty") {
          const lookAtTarget = fbxTree.Objects.Model[child.ID];
          if ("Lcl_Translation" in lookAtTarget) {
            const pos = lookAtTarget.Lcl_Translation.value;
            if (model.target !== void 0) {
              model.target.position.fromArray(pos);
              sceneGraph.add(model.target);
            } else {
              model.lookAt(new Vector3().fromArray(pos));
            }
          }
        }
      });
    }
  }
  bindSkeleton(skeletons, geometryMap, modelMap) {
    const bindMatrices = this.parsePoseNodes();
    for (const ID in skeletons) {
      const skeleton = skeletons[ID];
      const parents = connections.get(parseInt(skeleton.ID)).parents;
      parents.forEach(function(parent) {
        if (geometryMap.has(parent.ID)) {
          const geoID = parent.ID;
          const geoRelationships = connections.get(geoID);
          geoRelationships.parents.forEach(function(geoConnParent) {
            if (modelMap.has(geoConnParent.ID)) {
              const model = modelMap.get(geoConnParent.ID);
              model.bind(new Skeleton(skeleton.bones), bindMatrices[geoConnParent.ID]);
            }
          });
        }
      });
    }
  }
  parsePoseNodes() {
    const bindMatrices = {};
    if ("Pose" in fbxTree.Objects) {
      const BindPoseNode = fbxTree.Objects.Pose;
      for (const nodeID in BindPoseNode) {
        if (BindPoseNode[nodeID].attrType === "BindPose" && BindPoseNode[nodeID].NbPoseNodes > 0) {
          const poseNodes = BindPoseNode[nodeID].PoseNode;
          if (Array.isArray(poseNodes)) {
            poseNodes.forEach(function(poseNode) {
              bindMatrices[poseNode.Node] = new Matrix4().fromArray(poseNode.Matrix.a);
            });
          } else {
            bindMatrices[poseNodes.Node] = new Matrix4().fromArray(poseNodes.Matrix.a);
          }
        }
      }
    }
    return bindMatrices;
  }
  // Parse ambient color in FBXTree.GlobalSettings - if it's not set to black (default), create an ambient light
  createAmbientLight() {
    if ("GlobalSettings" in fbxTree && "AmbientColor" in fbxTree.GlobalSettings) {
      const ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
      const r = ambientColor[0];
      const g = ambientColor[1];
      const b = ambientColor[2];
      if (r !== 0 || g !== 0 || b !== 0) {
        const color = new Color(r, g, b);
        sceneGraph.add(new AmbientLight(color, 1));
      }
    }
  }
}
class GeometryParser {
  // Parse nodes in FBXTree.Objects.Geometry
  parse(deformers) {
    const geometryMap = /* @__PURE__ */ new Map();
    if ("Geometry" in fbxTree.Objects) {
      const geoNodes = fbxTree.Objects.Geometry;
      for (const nodeID in geoNodes) {
        const relationships = connections.get(parseInt(nodeID));
        const geo = this.parseGeometry(relationships, geoNodes[nodeID], deformers);
        geometryMap.set(parseInt(nodeID), geo);
      }
    }
    return geometryMap;
  }
  // Parse single node in FBXTree.Objects.Geometry
  parseGeometry(relationships, geoNode, deformers) {
    switch (geoNode.attrType) {
      case "Mesh":
        return this.parseMeshGeometry(relationships, geoNode, deformers);
      case "NurbsCurve":
        return this.parseNurbsGeometry(geoNode);
    }
  }
  // Parse single node mesh geometry in FBXTree.Objects.Geometry
  parseMeshGeometry(relationships, geoNode, deformers) {
    const skeletons = deformers.skeletons;
    const morphTargets = [];
    const modelNodes = relationships.parents.map(function(parent) {
      return fbxTree.Objects.Model[parent.ID];
    });
    if (modelNodes.length === 0)
      return;
    const skeleton = relationships.children.reduce(function(skeleton2, child) {
      if (skeletons[child.ID] !== void 0)
        skeleton2 = skeletons[child.ID];
      return skeleton2;
    }, null);
    relationships.children.forEach(function(child) {
      if (deformers.morphTargets[child.ID] !== void 0) {
        morphTargets.push(deformers.morphTargets[child.ID]);
      }
    });
    const modelNode = modelNodes[0];
    const transformData = {};
    if ("RotationOrder" in modelNode)
      transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
    if ("InheritType" in modelNode)
      transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ("GeometricTranslation" in modelNode)
      transformData.translation = modelNode.GeometricTranslation.value;
    if ("GeometricRotation" in modelNode)
      transformData.rotation = modelNode.GeometricRotation.value;
    if ("GeometricScaling" in modelNode)
      transformData.scale = modelNode.GeometricScaling.value;
    const transform = generateTransform(transformData);
    return this.genGeometry(geoNode, skeleton, morphTargets, transform);
  }
  // Generate a BufferGeometry from a node in FBXTree.Objects.Geometry
  genGeometry(geoNode, skeleton, morphTargets, preTransform) {
    const geo = new BufferGeometry();
    if (geoNode.attrName)
      geo.name = geoNode.attrName;
    const geoInfo = this.parseGeoNode(geoNode, skeleton);
    const buffers = this.genBuffers(geoInfo);
    const positionAttribute = new Float32BufferAttribute(buffers.vertex, 3);
    positionAttribute.applyMatrix4(preTransform);
    geo.setAttribute("position", positionAttribute);
    if (buffers.colors.length > 0) {
      geo.setAttribute("color", new Float32BufferAttribute(buffers.colors, 3));
    }
    if (skeleton) {
      geo.setAttribute("skinIndex", new Uint16BufferAttribute(buffers.weightsIndices, 4));
      geo.setAttribute("skinWeight", new Float32BufferAttribute(buffers.vertexWeights, 4));
      geo.FBX_Deformer = skeleton;
    }
    if (buffers.normal.length > 0) {
      const normalMatrix = new Matrix3().getNormalMatrix(preTransform);
      const normalAttribute = new Float32BufferAttribute(buffers.normal, 3);
      normalAttribute.applyNormalMatrix(normalMatrix);
      geo.setAttribute("normal", normalAttribute);
    }
    buffers.uvs.forEach(function(uvBuffer, i) {
      if (UV1 === "uv2")
        i++;
      const name = i === 0 ? "uv" : `uv${i}`;
      geo.setAttribute(name, new Float32BufferAttribute(buffers.uvs[i], 2));
    });
    if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
      let prevMaterialIndex = buffers.materialIndex[0];
      let startIndex = 0;
      buffers.materialIndex.forEach(function(currentIndex, i) {
        if (currentIndex !== prevMaterialIndex) {
          geo.addGroup(startIndex, i - startIndex, prevMaterialIndex);
          prevMaterialIndex = currentIndex;
          startIndex = i;
        }
      });
      if (geo.groups.length > 0) {
        const lastGroup = geo.groups[geo.groups.length - 1];
        const lastIndex = lastGroup.start + lastGroup.count;
        if (lastIndex !== buffers.materialIndex.length) {
          geo.addGroup(lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex);
        }
      }
      if (geo.groups.length === 0) {
        geo.addGroup(0, buffers.materialIndex.length, buffers.materialIndex[0]);
      }
    }
    this.addMorphTargets(geo, geoNode, morphTargets, preTransform);
    return geo;
  }
  parseGeoNode(geoNode, skeleton) {
    const geoInfo = {};
    geoInfo.vertexPositions = geoNode.Vertices !== void 0 ? geoNode.Vertices.a : [];
    geoInfo.vertexIndices = geoNode.PolygonVertexIndex !== void 0 ? geoNode.PolygonVertexIndex.a : [];
    if (geoNode.LayerElementColor) {
      geoInfo.color = this.parseVertexColors(geoNode.LayerElementColor[0]);
    }
    if (geoNode.LayerElementMaterial) {
      geoInfo.material = this.parseMaterialIndices(geoNode.LayerElementMaterial[0]);
    }
    if (geoNode.LayerElementNormal) {
      geoInfo.normal = this.parseNormals(geoNode.LayerElementNormal[0]);
    }
    if (geoNode.LayerElementUV) {
      geoInfo.uv = [];
      let i = 0;
      while (geoNode.LayerElementUV[i]) {
        if (geoNode.LayerElementUV[i].UV) {
          geoInfo.uv.push(this.parseUVs(geoNode.LayerElementUV[i]));
        }
        i++;
      }
    }
    geoInfo.weightTable = {};
    if (skeleton !== null) {
      geoInfo.skeleton = skeleton;
      skeleton.rawBones.forEach(function(rawBone, i) {
        rawBone.indices.forEach(function(index, j) {
          if (geoInfo.weightTable[index] === void 0)
            geoInfo.weightTable[index] = [];
          geoInfo.weightTable[index].push({
            id: i,
            weight: rawBone.weights[j]
          });
        });
      });
    }
    return geoInfo;
  }
  genBuffers(geoInfo) {
    const buffers = {
      vertex: [],
      normal: [],
      colors: [],
      uvs: [],
      materialIndex: [],
      vertexWeights: [],
      weightsIndices: []
    };
    let polygonIndex = 0;
    let faceLength = 0;
    let displayedWeightsWarning = false;
    let facePositionIndexes = [];
    let faceNormals = [];
    let faceColors = [];
    let faceUVs = [];
    let faceWeights = [];
    let faceWeightIndices = [];
    const scope = this;
    geoInfo.vertexIndices.forEach(function(vertexIndex, polygonVertexIndex) {
      let materialIndex;
      let endOfFace = false;
      if (vertexIndex < 0) {
        vertexIndex = vertexIndex ^ -1;
        endOfFace = true;
      }
      let weightIndices = [];
      let weights = [];
      facePositionIndexes.push(vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2);
      if (geoInfo.color) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color);
        faceColors.push(data[0], data[1], data[2]);
      }
      if (geoInfo.skeleton) {
        if (geoInfo.weightTable[vertexIndex] !== void 0) {
          geoInfo.weightTable[vertexIndex].forEach(function(wt) {
            weights.push(wt.weight);
            weightIndices.push(wt.id);
          });
        }
        if (weights.length > 4) {
          if (!displayedWeightsWarning) {
            console.warn(
              "THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights."
            );
            displayedWeightsWarning = true;
          }
          const wIndex = [0, 0, 0, 0];
          const Weight = [0, 0, 0, 0];
          weights.forEach(function(weight, weightIndex) {
            let currentWeight = weight;
            let currentIndex = weightIndices[weightIndex];
            Weight.forEach(function(comparedWeight, comparedWeightIndex, comparedWeightArray) {
              if (currentWeight > comparedWeight) {
                comparedWeightArray[comparedWeightIndex] = currentWeight;
                currentWeight = comparedWeight;
                const tmp = wIndex[comparedWeightIndex];
                wIndex[comparedWeightIndex] = currentIndex;
                currentIndex = tmp;
              }
            });
          });
          weightIndices = wIndex;
          weights = Weight;
        }
        while (weights.length < 4) {
          weights.push(0);
          weightIndices.push(0);
        }
        for (let i = 0; i < 4; ++i) {
          faceWeights.push(weights[i]);
          faceWeightIndices.push(weightIndices[i]);
        }
      }
      if (geoInfo.normal) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal);
        faceNormals.push(data[0], data[1], data[2]);
      }
      if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
        materialIndex = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material)[0];
      }
      if (geoInfo.uv) {
        geoInfo.uv.forEach(function(uv, i) {
          const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, uv);
          if (faceUVs[i] === void 0) {
            faceUVs[i] = [];
          }
          faceUVs[i].push(data[0]);
          faceUVs[i].push(data[1]);
        });
      }
      faceLength++;
      if (endOfFace) {
        scope.genFace(
          buffers,
          geoInfo,
          facePositionIndexes,
          materialIndex,
          faceNormals,
          faceColors,
          faceUVs,
          faceWeights,
          faceWeightIndices,
          faceLength
        );
        polygonIndex++;
        faceLength = 0;
        facePositionIndexes = [];
        faceNormals = [];
        faceColors = [];
        faceUVs = [];
        faceWeights = [];
        faceWeightIndices = [];
      }
    });
    return buffers;
  }
  // Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris
  genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength) {
    for (let i = 2; i < faceLength; i++) {
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[0]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 2]]);
      if (geoInfo.skeleton) {
        buffers.vertexWeights.push(faceWeights[0]);
        buffers.vertexWeights.push(faceWeights[1]);
        buffers.vertexWeights.push(faceWeights[2]);
        buffers.vertexWeights.push(faceWeights[3]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 3]);
        buffers.vertexWeights.push(faceWeights[i * 4]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[0]);
        buffers.weightsIndices.push(faceWeightIndices[1]);
        buffers.weightsIndices.push(faceWeightIndices[2]);
        buffers.weightsIndices.push(faceWeightIndices[3]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 3]);
      }
      if (geoInfo.color) {
        buffers.colors.push(faceColors[0]);
        buffers.colors.push(faceColors[1]);
        buffers.colors.push(faceColors[2]);
        buffers.colors.push(faceColors[(i - 1) * 3]);
        buffers.colors.push(faceColors[(i - 1) * 3 + 1]);
        buffers.colors.push(faceColors[(i - 1) * 3 + 2]);
        buffers.colors.push(faceColors[i * 3]);
        buffers.colors.push(faceColors[i * 3 + 1]);
        buffers.colors.push(faceColors[i * 3 + 2]);
      }
      if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
      }
      if (geoInfo.normal) {
        buffers.normal.push(faceNormals[0]);
        buffers.normal.push(faceNormals[1]);
        buffers.normal.push(faceNormals[2]);
        buffers.normal.push(faceNormals[(i - 1) * 3]);
        buffers.normal.push(faceNormals[(i - 1) * 3 + 1]);
        buffers.normal.push(faceNormals[(i - 1) * 3 + 2]);
        buffers.normal.push(faceNormals[i * 3]);
        buffers.normal.push(faceNormals[i * 3 + 1]);
        buffers.normal.push(faceNormals[i * 3 + 2]);
      }
      if (geoInfo.uv) {
        geoInfo.uv.forEach(function(uv, j) {
          if (buffers.uvs[j] === void 0)
            buffers.uvs[j] = [];
          buffers.uvs[j].push(faceUVs[j][0]);
          buffers.uvs[j].push(faceUVs[j][1]);
          buffers.uvs[j].push(faceUVs[j][(i - 1) * 2]);
          buffers.uvs[j].push(faceUVs[j][(i - 1) * 2 + 1]);
          buffers.uvs[j].push(faceUVs[j][i * 2]);
          buffers.uvs[j].push(faceUVs[j][i * 2 + 1]);
        });
      }
    }
  }
  addMorphTargets(parentGeo, parentGeoNode, morphTargets, preTransform) {
    if (morphTargets.length === 0)
      return;
    parentGeo.morphTargetsRelative = true;
    parentGeo.morphAttributes.position = [];
    const scope = this;
    morphTargets.forEach(function(morphTarget) {
      morphTarget.rawTargets.forEach(function(rawTarget) {
        const morphGeoNode = fbxTree.Objects.Geometry[rawTarget.geoID];
        if (morphGeoNode !== void 0) {
          scope.genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name);
        }
      });
    });
  }
  // a morph geometry node is similar to a standard  node, and the node is also contained
  // in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
  // and a special attribute Index defining which vertices of the original geometry are affected
  // Normal and position attributes only have data for the vertices that are affected by the morph
  genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {
    const vertexIndices = parentGeoNode.PolygonVertexIndex !== void 0 ? parentGeoNode.PolygonVertexIndex.a : [];
    const morphPositionsSparse = morphGeoNode.Vertices !== void 0 ? morphGeoNode.Vertices.a : [];
    const indices = morphGeoNode.Indexes !== void 0 ? morphGeoNode.Indexes.a : [];
    const length = parentGeo.attributes.position.count * 3;
    const morphPositions = new Float32Array(length);
    for (let i = 0; i < indices.length; i++) {
      const morphIndex = indices[i] * 3;
      morphPositions[morphIndex] = morphPositionsSparse[i * 3];
      morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
      morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];
    }
    const morphGeoInfo = {
      vertexIndices,
      vertexPositions: morphPositions
    };
    const morphBuffers = this.genBuffers(morphGeoInfo);
    const positionAttribute = new Float32BufferAttribute(morphBuffers.vertex, 3);
    positionAttribute.name = name || morphGeoNode.attrName;
    positionAttribute.applyMatrix4(preTransform);
    parentGeo.morphAttributes.position.push(positionAttribute);
  }
  // Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists
  parseNormals(NormalNode) {
    const mappingType = NormalNode.MappingInformationType;
    const referenceType = NormalNode.ReferenceInformationType;
    const buffer = NormalNode.Normals.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      if ("NormalIndex" in NormalNode) {
        indexBuffer = NormalNode.NormalIndex.a;
      } else if ("NormalsIndex" in NormalNode) {
        indexBuffer = NormalNode.NormalsIndex.a;
      }
    }
    return {
      dataSize: 3,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists
  parseUVs(UVNode) {
    const mappingType = UVNode.MappingInformationType;
    const referenceType = UVNode.ReferenceInformationType;
    const buffer = UVNode.UV.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      indexBuffer = UVNode.UVIndex.a;
    }
    return {
      dataSize: 2,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists
  parseVertexColors(ColorNode) {
    const mappingType = ColorNode.MappingInformationType;
    const referenceType = ColorNode.ReferenceInformationType;
    const buffer = ColorNode.Colors.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      indexBuffer = ColorNode.ColorIndex.a;
    }
    return {
      dataSize: 4,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists
  parseMaterialIndices(MaterialNode) {
    const mappingType = MaterialNode.MappingInformationType;
    const referenceType = MaterialNode.ReferenceInformationType;
    if (mappingType === "NoMappingInformation") {
      return {
        dataSize: 1,
        buffer: [0],
        indices: [0],
        mappingType: "AllSame",
        referenceType
      };
    }
    const materialIndexBuffer = MaterialNode.Materials.a;
    const materialIndices = [];
    for (let i = 0; i < materialIndexBuffer.length; ++i) {
      materialIndices.push(i);
    }
    return {
      dataSize: 1,
      buffer: materialIndexBuffer,
      indices: materialIndices,
      mappingType,
      referenceType
    };
  }
  // Generate a NurbGeometry from a node in FBXTree.Objects.Geometry
  parseNurbsGeometry(geoNode) {
    if (NURBSCurve === void 0) {
      console.error(
        "THREE.FBXLoader: The loader relies on NURBSCurve for any nurbs present in the model. Nurbs will show up as empty geometry."
      );
      return new BufferGeometry();
    }
    const order = parseInt(geoNode.Order);
    if (isNaN(order)) {
      console.error("THREE.FBXLoader: Invalid Order %s given for geometry ID: %s", geoNode.Order, geoNode.id);
      return new BufferGeometry();
    }
    const degree = order - 1;
    const knots = geoNode.KnotVector.a;
    const controlPoints = [];
    const pointsValues = geoNode.Points.a;
    for (let i = 0, l = pointsValues.length; i < l; i += 4) {
      controlPoints.push(new Vector4().fromArray(pointsValues, i));
    }
    let startKnot, endKnot;
    if (geoNode.Form === "Closed") {
      controlPoints.push(controlPoints[0]);
    } else if (geoNode.Form === "Periodic") {
      startKnot = degree;
      endKnot = knots.length - 1 - startKnot;
      for (let i = 0; i < degree; ++i) {
        controlPoints.push(controlPoints[i]);
      }
    }
    const curve = new NURBSCurve(degree, knots, controlPoints, startKnot, endKnot);
    const points = curve.getPoints(controlPoints.length * 12);
    return new BufferGeometry().setFromPoints(points);
  }
}
class AnimationParser {
  // take raw animation clips and turn them into three.js animation clips
  parse() {
    const animationClips = [];
    const rawClips = this.parseClips();
    if (rawClips !== void 0) {
      for (const key in rawClips) {
        const rawClip = rawClips[key];
        const clip = this.addClip(rawClip);
        animationClips.push(clip);
      }
    }
    return animationClips;
  }
  parseClips() {
    if (fbxTree.Objects.AnimationCurve === void 0)
      return void 0;
    const curveNodesMap = this.parseAnimationCurveNodes();
    this.parseAnimationCurves(curveNodesMap);
    const layersMap = this.parseAnimationLayers(curveNodesMap);
    const rawClips = this.parseAnimStacks(layersMap);
    return rawClips;
  }
  // parse nodes in FBXTree.Objects.AnimationCurveNode
  // each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
  // and is referenced by an AnimationLayer
  parseAnimationCurveNodes() {
    const rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
    const curveNodesMap = /* @__PURE__ */ new Map();
    for (const nodeID in rawCurveNodes) {
      const rawCurveNode = rawCurveNodes[nodeID];
      if (rawCurveNode.attrName.match(/S|R|T|DeformPercent/) !== null) {
        const curveNode = {
          id: rawCurveNode.id,
          attr: rawCurveNode.attrName,
          curves: {}
        };
        curveNodesMap.set(curveNode.id, curveNode);
      }
    }
    return curveNodesMap;
  }
  // parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
  // previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
  // axis ( e.g. times and values of x rotation)
  parseAnimationCurves(curveNodesMap) {
    const rawCurves = fbxTree.Objects.AnimationCurve;
    for (const nodeID in rawCurves) {
      const animationCurve = {
        id: rawCurves[nodeID].id,
        times: rawCurves[nodeID].KeyTime.a.map(convertFBXTimeToSeconds),
        values: rawCurves[nodeID].KeyValueFloat.a
      };
      const relationships = connections.get(animationCurve.id);
      if (relationships !== void 0) {
        const animationCurveID = relationships.parents[0].ID;
        const animationCurveRelationship = relationships.parents[0].relationship;
        if (animationCurveRelationship.match(/X/)) {
          curveNodesMap.get(animationCurveID).curves["x"] = animationCurve;
        } else if (animationCurveRelationship.match(/Y/)) {
          curveNodesMap.get(animationCurveID).curves["y"] = animationCurve;
        } else if (animationCurveRelationship.match(/Z/)) {
          curveNodesMap.get(animationCurveID).curves["z"] = animationCurve;
        } else if (animationCurveRelationship.match(/d|DeformPercent/) && curveNodesMap.has(animationCurveID)) {
          curveNodesMap.get(animationCurveID).curves["morph"] = animationCurve;
        }
      }
    }
  }
  // parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
  // to various AnimationCurveNodes and is referenced by an AnimationStack node
  // note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack
  parseAnimationLayers(curveNodesMap) {
    const rawLayers = fbxTree.Objects.AnimationLayer;
    const layersMap = /* @__PURE__ */ new Map();
    for (const nodeID in rawLayers) {
      const layerCurveNodes = [];
      const connection = connections.get(parseInt(nodeID));
      if (connection !== void 0) {
        const children = connection.children;
        children.forEach(function(child, i) {
          if (curveNodesMap.has(child.ID)) {
            const curveNode = curveNodesMap.get(child.ID);
            if (curveNode.curves.x !== void 0 || curveNode.curves.y !== void 0 || curveNode.curves.z !== void 0) {
              if (layerCurveNodes[i] === void 0) {
                const modelID = connections.get(child.ID).parents.filter(function(parent) {
                  return parent.relationship !== void 0;
                })[0].ID;
                if (modelID !== void 0) {
                  const rawModel = fbxTree.Objects.Model[modelID.toString()];
                  if (rawModel === void 0) {
                    console.warn("THREE.FBXLoader: Encountered a unused curve.", child);
                    return;
                  }
                  const node = {
                    modelName: rawModel.attrName ? PropertyBinding.sanitizeNodeName(rawModel.attrName) : "",
                    ID: rawModel.id,
                    initialPosition: [0, 0, 0],
                    initialRotation: [0, 0, 0],
                    initialScale: [1, 1, 1]
                  };
                  sceneGraph.traverse(function(child2) {
                    if (child2.ID === rawModel.id) {
                      node.transform = child2.matrix;
                      if (child2.userData.transformData)
                        node.eulerOrder = child2.userData.transformData.eulerOrder;
                    }
                  });
                  if (!node.transform)
                    node.transform = new Matrix4();
                  if ("PreRotation" in rawModel)
                    node.preRotation = rawModel.PreRotation.value;
                  if ("PostRotation" in rawModel)
                    node.postRotation = rawModel.PostRotation.value;
                  layerCurveNodes[i] = node;
                }
              }
              if (layerCurveNodes[i])
                layerCurveNodes[i][curveNode.attr] = curveNode;
            } else if (curveNode.curves.morph !== void 0) {
              if (layerCurveNodes[i] === void 0) {
                const deformerID = connections.get(child.ID).parents.filter(function(parent) {
                  return parent.relationship !== void 0;
                })[0].ID;
                const morpherID = connections.get(deformerID).parents[0].ID;
                const geoID = connections.get(morpherID).parents[0].ID;
                const modelID = connections.get(geoID).parents[0].ID;
                const rawModel = fbxTree.Objects.Model[modelID];
                const node = {
                  modelName: rawModel.attrName ? PropertyBinding.sanitizeNodeName(rawModel.attrName) : "",
                  morphName: fbxTree.Objects.Deformer[deformerID].attrName
                };
                layerCurveNodes[i] = node;
              }
              layerCurveNodes[i][curveNode.attr] = curveNode;
            }
          }
        });
        layersMap.set(parseInt(nodeID), layerCurveNodes);
      }
    }
    return layersMap;
  }
  // parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
  // hierarchy. Each Stack node will be used to create a AnimationClip
  parseAnimStacks(layersMap) {
    const rawStacks = fbxTree.Objects.AnimationStack;
    const rawClips = {};
    for (const nodeID in rawStacks) {
      const children = connections.get(parseInt(nodeID)).children;
      if (children.length > 1) {
        console.warn(
          "THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers."
        );
      }
      const layer = layersMap.get(children[0].ID);
      rawClips[nodeID] = {
        name: rawStacks[nodeID].attrName,
        layer
      };
    }
    return rawClips;
  }
  addClip(rawClip) {
    let tracks = [];
    const scope = this;
    rawClip.layer.forEach(function(rawTracks) {
      tracks = tracks.concat(scope.generateTracks(rawTracks));
    });
    return new AnimationClip(rawClip.name, -1, tracks);
  }
  generateTracks(rawTracks) {
    const tracks = [];
    let initialPosition = new Vector3();
    let initialRotation = new Quaternion();
    let initialScale = new Vector3();
    if (rawTracks.transform)
      rawTracks.transform.decompose(initialPosition, initialRotation, initialScale);
    initialPosition = initialPosition.toArray();
    initialRotation = new Euler().setFromQuaternion(initialRotation, rawTracks.eulerOrder).toArray();
    initialScale = initialScale.toArray();
    if (rawTracks.T !== void 0 && Object.keys(rawTracks.T.curves).length > 0) {
      const positionTrack = this.generateVectorTrack(
        rawTracks.modelName,
        rawTracks.T.curves,
        initialPosition,
        "position"
      );
      if (positionTrack !== void 0)
        tracks.push(positionTrack);
    }
    if (rawTracks.R !== void 0 && Object.keys(rawTracks.R.curves).length > 0) {
      const rotationTrack = this.generateRotationTrack(
        rawTracks.modelName,
        rawTracks.R.curves,
        initialRotation,
        rawTracks.preRotation,
        rawTracks.postRotation,
        rawTracks.eulerOrder
      );
      if (rotationTrack !== void 0)
        tracks.push(rotationTrack);
    }
    if (rawTracks.S !== void 0 && Object.keys(rawTracks.S.curves).length > 0) {
      const scaleTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.S.curves, initialScale, "scale");
      if (scaleTrack !== void 0)
        tracks.push(scaleTrack);
    }
    if (rawTracks.DeformPercent !== void 0) {
      const morphTrack = this.generateMorphTrack(rawTracks);
      if (morphTrack !== void 0)
        tracks.push(morphTrack);
    }
    return tracks;
  }
  generateVectorTrack(modelName, curves, initialValue, type) {
    const times = this.getTimesForAllAxes(curves);
    const values = this.getKeyframeTrackValues(times, curves, initialValue);
    return new VectorKeyframeTrack(modelName + "." + type, times, values);
  }
  generateRotationTrack(modelName, curves, initialValue, preRotation, postRotation, eulerOrder) {
    if (curves.x !== void 0) {
      this.interpolateRotations(curves.x);
      curves.x.values = curves.x.values.map(MathUtils.degToRad);
    }
    if (curves.y !== void 0) {
      this.interpolateRotations(curves.y);
      curves.y.values = curves.y.values.map(MathUtils.degToRad);
    }
    if (curves.z !== void 0) {
      this.interpolateRotations(curves.z);
      curves.z.values = curves.z.values.map(MathUtils.degToRad);
    }
    const times = this.getTimesForAllAxes(curves);
    const values = this.getKeyframeTrackValues(times, curves, initialValue);
    if (preRotation !== void 0) {
      preRotation = preRotation.map(MathUtils.degToRad);
      preRotation.push(eulerOrder);
      preRotation = new Euler().fromArray(preRotation);
      preRotation = new Quaternion().setFromEuler(preRotation);
    }
    if (postRotation !== void 0) {
      postRotation = postRotation.map(MathUtils.degToRad);
      postRotation.push(eulerOrder);
      postRotation = new Euler().fromArray(postRotation);
      postRotation = new Quaternion().setFromEuler(postRotation).invert();
    }
    const quaternion = new Quaternion();
    const euler = new Euler();
    const quaternionValues = [];
    for (let i = 0; i < values.length; i += 3) {
      euler.set(values[i], values[i + 1], values[i + 2], eulerOrder);
      quaternion.setFromEuler(euler);
      if (preRotation !== void 0)
        quaternion.premultiply(preRotation);
      if (postRotation !== void 0)
        quaternion.multiply(postRotation);
      quaternion.toArray(quaternionValues, i / 3 * 4);
    }
    return new QuaternionKeyframeTrack(modelName + ".quaternion", times, quaternionValues);
  }
  generateMorphTrack(rawTracks) {
    const curves = rawTracks.DeformPercent.curves.morph;
    const values = curves.values.map(function(val) {
      return val / 100;
    });
    const morphNum = sceneGraph.getObjectByName(rawTracks.modelName).morphTargetDictionary[rawTracks.morphName];
    return new NumberKeyframeTrack(
      rawTracks.modelName + ".morphTargetInfluences[" + morphNum + "]",
      curves.times,
      values
    );
  }
  // For all animated objects, times are defined separately for each axis
  // Here we'll combine the times into one sorted array without duplicates
  getTimesForAllAxes(curves) {
    let times = [];
    if (curves.x !== void 0)
      times = times.concat(curves.x.times);
    if (curves.y !== void 0)
      times = times.concat(curves.y.times);
    if (curves.z !== void 0)
      times = times.concat(curves.z.times);
    times = times.sort(function(a, b) {
      return a - b;
    });
    if (times.length > 1) {
      let targetIndex = 1;
      let lastValue = times[0];
      for (let i = 1; i < times.length; i++) {
        const currentValue = times[i];
        if (currentValue !== lastValue) {
          times[targetIndex] = currentValue;
          lastValue = currentValue;
          targetIndex++;
        }
      }
      times = times.slice(0, targetIndex);
    }
    return times;
  }
  getKeyframeTrackValues(times, curves, initialValue) {
    const prevValue = initialValue;
    const values = [];
    let xIndex = -1;
    let yIndex = -1;
    let zIndex = -1;
    times.forEach(function(time) {
      if (curves.x)
        xIndex = curves.x.times.indexOf(time);
      if (curves.y)
        yIndex = curves.y.times.indexOf(time);
      if (curves.z)
        zIndex = curves.z.times.indexOf(time);
      if (xIndex !== -1) {
        const xValue = curves.x.values[xIndex];
        values.push(xValue);
        prevValue[0] = xValue;
      } else {
        values.push(prevValue[0]);
      }
      if (yIndex !== -1) {
        const yValue = curves.y.values[yIndex];
        values.push(yValue);
        prevValue[1] = yValue;
      } else {
        values.push(prevValue[1]);
      }
      if (zIndex !== -1) {
        const zValue = curves.z.values[zIndex];
        values.push(zValue);
        prevValue[2] = zValue;
      } else {
        values.push(prevValue[2]);
      }
    });
    return values;
  }
  // Rotations are defined as Euler angles which can have values  of any size
  // These will be converted to quaternions which don't support values greater than
  // PI, so we'll interpolate large rotations
  interpolateRotations(curve) {
    for (let i = 1; i < curve.values.length; i++) {
      const initialValue = curve.values[i - 1];
      const valuesSpan = curve.values[i] - initialValue;
      const absoluteSpan = Math.abs(valuesSpan);
      if (absoluteSpan >= 180) {
        const numSubIntervals = absoluteSpan / 180;
        const step = valuesSpan / numSubIntervals;
        let nextValue = initialValue + step;
        const initialTime = curve.times[i - 1];
        const timeSpan = curve.times[i] - initialTime;
        const interval = timeSpan / numSubIntervals;
        let nextTime = initialTime + interval;
        const interpolatedTimes = [];
        const interpolatedValues = [];
        while (nextTime < curve.times[i]) {
          interpolatedTimes.push(nextTime);
          nextTime += interval;
          interpolatedValues.push(nextValue);
          nextValue += step;
        }
        curve.times = inject(curve.times, i, interpolatedTimes);
        curve.values = inject(curve.values, i, interpolatedValues);
      }
    }
  }
}
class TextParser {
  getPrevNode() {
    return this.nodeStack[this.currentIndent - 2];
  }
  getCurrentNode() {
    return this.nodeStack[this.currentIndent - 1];
  }
  getCurrentProp() {
    return this.currentProp;
  }
  pushStack(node) {
    this.nodeStack.push(node);
    this.currentIndent += 1;
  }
  popStack() {
    this.nodeStack.pop();
    this.currentIndent -= 1;
  }
  setCurrentProp(val, name) {
    this.currentProp = val;
    this.currentPropName = name;
  }
  parse(text) {
    this.currentIndent = 0;
    this.allNodes = new FBXTree();
    this.nodeStack = [];
    this.currentProp = [];
    this.currentPropName = "";
    const scope = this;
    const split = text.split(/[\r\n]+/);
    split.forEach(function(line, i) {
      const matchComment = line.match(/^[\s\t]*;/);
      const matchEmpty = line.match(/^[\s\t]*$/);
      if (matchComment || matchEmpty)
        return;
      const matchBeginning = line.match("^\\t{" + scope.currentIndent + "}(\\w+):(.*){", "");
      const matchProperty = line.match("^\\t{" + scope.currentIndent + "}(\\w+):[\\s\\t\\r\\n](.*)");
      const matchEnd = line.match("^\\t{" + (scope.currentIndent - 1) + "}}");
      if (matchBeginning) {
        scope.parseNodeBegin(line, matchBeginning);
      } else if (matchProperty) {
        scope.parseNodeProperty(line, matchProperty, split[++i]);
      } else if (matchEnd) {
        scope.popStack();
      } else if (line.match(/^[^\s\t}]/)) {
        scope.parseNodePropertyContinued(line);
      }
    });
    return this.allNodes;
  }
  parseNodeBegin(line, property) {
    const nodeName = property[1].trim().replace(/^"/, "").replace(/"$/, "");
    const nodeAttrs = property[2].split(",").map(function(attr) {
      return attr.trim().replace(/^"/, "").replace(/"$/, "");
    });
    const node = { name: nodeName };
    const attrs = this.parseNodeAttr(nodeAttrs);
    const currentNode = this.getCurrentNode();
    if (this.currentIndent === 0) {
      this.allNodes.add(nodeName, node);
    } else {
      if (nodeName in currentNode) {
        if (nodeName === "PoseNode") {
          currentNode.PoseNode.push(node);
        } else if (currentNode[nodeName].id !== void 0) {
          currentNode[nodeName] = {};
          currentNode[nodeName][currentNode[nodeName].id] = currentNode[nodeName];
        }
        if (attrs.id !== "")
          currentNode[nodeName][attrs.id] = node;
      } else if (typeof attrs.id === "number") {
        currentNode[nodeName] = {};
        currentNode[nodeName][attrs.id] = node;
      } else if (nodeName !== "Properties70") {
        if (nodeName === "PoseNode")
          currentNode[nodeName] = [node];
        else
          currentNode[nodeName] = node;
      }
    }
    if (typeof attrs.id === "number")
      node.id = attrs.id;
    if (attrs.name !== "")
      node.attrName = attrs.name;
    if (attrs.type !== "")
      node.attrType = attrs.type;
    this.pushStack(node);
  }
  parseNodeAttr(attrs) {
    let id = attrs[0];
    if (attrs[0] !== "") {
      id = parseInt(attrs[0]);
      if (isNaN(id)) {
        id = attrs[0];
      }
    }
    let name = "", type = "";
    if (attrs.length > 1) {
      name = attrs[1].replace(/^(\w+)::/, "");
      type = attrs[2];
    }
    return { id, name, type };
  }
  parseNodeProperty(line, property, contentLine) {
    let propName = property[1].replace(/^"/, "").replace(/"$/, "").trim();
    let propValue = property[2].replace(/^"/, "").replace(/"$/, "").trim();
    if (propName === "Content" && propValue === ",") {
      propValue = contentLine.replace(/"/g, "").replace(/,$/, "").trim();
    }
    const currentNode = this.getCurrentNode();
    const parentName = currentNode.name;
    if (parentName === "Properties70") {
      this.parseNodeSpecialProperty(line, propName, propValue);
      return;
    }
    if (propName === "C") {
      const connProps = propValue.split(",").slice(1);
      const from = parseInt(connProps[0]);
      const to = parseInt(connProps[1]);
      let rest = propValue.split(",").slice(3);
      rest = rest.map(function(elem) {
        return elem.trim().replace(/^"/, "");
      });
      propName = "connections";
      propValue = [from, to];
      append(propValue, rest);
      if (currentNode[propName] === void 0) {
        currentNode[propName] = [];
      }
    }
    if (propName === "Node")
      currentNode.id = propValue;
    if (propName in currentNode && Array.isArray(currentNode[propName])) {
      currentNode[propName].push(propValue);
    } else {
      if (propName !== "a")
        currentNode[propName] = propValue;
      else
        currentNode.a = propValue;
    }
    this.setCurrentProp(currentNode, propName);
    if (propName === "a" && propValue.slice(-1) !== ",") {
      currentNode.a = parseNumberArray(propValue);
    }
  }
  parseNodePropertyContinued(line) {
    const currentNode = this.getCurrentNode();
    currentNode.a += line;
    if (line.slice(-1) !== ",") {
      currentNode.a = parseNumberArray(currentNode.a);
    }
  }
  // parse "Property70"
  parseNodeSpecialProperty(line, propName, propValue) {
    const props = propValue.split('",').map(function(prop) {
      return prop.trim().replace(/^\"/, "").replace(/\s/, "_");
    });
    const innerPropName = props[0];
    const innerPropType1 = props[1];
    const innerPropType2 = props[2];
    const innerPropFlag = props[3];
    let innerPropValue = props[4];
    switch (innerPropType1) {
      case "int":
      case "enum":
      case "bool":
      case "ULongLong":
      case "double":
      case "Number":
      case "FieldOfView":
        innerPropValue = parseFloat(innerPropValue);
        break;
      case "Color":
      case "ColorRGB":
      case "Vector3D":
      case "Lcl_Translation":
      case "Lcl_Rotation":
      case "Lcl_Scaling":
        innerPropValue = parseNumberArray(innerPropValue);
        break;
    }
    this.getPrevNode()[innerPropName] = {
      type: innerPropType1,
      type2: innerPropType2,
      flag: innerPropFlag,
      value: innerPropValue
    };
    this.setCurrentProp(this.getPrevNode(), innerPropName);
  }
}
class BinaryParser {
  parse(buffer) {
    const reader = new BinaryReader(buffer);
    reader.skip(23);
    const version = reader.getUint32();
    if (version < 6400) {
      throw new Error("THREE.FBXLoader: FBX version not supported, FileVersion: " + version);
    }
    const allNodes = new FBXTree();
    while (!this.endOfContent(reader)) {
      const node = this.parseNode(reader, version);
      if (node !== null)
        allNodes.add(node.name, node);
    }
    return allNodes;
  }
  // Check if reader has reached the end of content.
  endOfContent(reader) {
    if (reader.size() % 16 === 0) {
      return (reader.getOffset() + 160 + 16 & ~15) >= reader.size();
    } else {
      return reader.getOffset() + 160 + 16 >= reader.size();
    }
  }
  // recursively parse nodes until the end of the file is reached
  parseNode(reader, version) {
    const node = {};
    const endOffset = version >= 7500 ? reader.getUint64() : reader.getUint32();
    const numProperties = version >= 7500 ? reader.getUint64() : reader.getUint32();
    version >= 7500 ? reader.getUint64() : reader.getUint32();
    const nameLen = reader.getUint8();
    const name = reader.getString(nameLen);
    if (endOffset === 0)
      return null;
    const propertyList = [];
    for (let i = 0; i < numProperties; i++) {
      propertyList.push(this.parseProperty(reader));
    }
    const id = propertyList.length > 0 ? propertyList[0] : "";
    const attrName = propertyList.length > 1 ? propertyList[1] : "";
    const attrType = propertyList.length > 2 ? propertyList[2] : "";
    node.singleProperty = numProperties === 1 && reader.getOffset() === endOffset ? true : false;
    while (endOffset > reader.getOffset()) {
      const subNode = this.parseNode(reader, version);
      if (subNode !== null)
        this.parseSubNode(name, node, subNode);
    }
    node.propertyList = propertyList;
    if (typeof id === "number")
      node.id = id;
    if (attrName !== "")
      node.attrName = attrName;
    if (attrType !== "")
      node.attrType = attrType;
    if (name !== "")
      node.name = name;
    return node;
  }
  parseSubNode(name, node, subNode) {
    if (subNode.singleProperty === true) {
      const value = subNode.propertyList[0];
      if (Array.isArray(value)) {
        node[subNode.name] = subNode;
        subNode.a = value;
      } else {
        node[subNode.name] = value;
      }
    } else if (name === "Connections" && subNode.name === "C") {
      const array = [];
      subNode.propertyList.forEach(function(property, i) {
        if (i !== 0)
          array.push(property);
      });
      if (node.connections === void 0) {
        node.connections = [];
      }
      node.connections.push(array);
    } else if (subNode.name === "Properties70") {
      const keys = Object.keys(subNode);
      keys.forEach(function(key) {
        node[key] = subNode[key];
      });
    } else if (name === "Properties70" && subNode.name === "P") {
      let innerPropName = subNode.propertyList[0];
      let innerPropType1 = subNode.propertyList[1];
      const innerPropType2 = subNode.propertyList[2];
      const innerPropFlag = subNode.propertyList[3];
      let innerPropValue;
      if (innerPropName.indexOf("Lcl ") === 0)
        innerPropName = innerPropName.replace("Lcl ", "Lcl_");
      if (innerPropType1.indexOf("Lcl ") === 0)
        innerPropType1 = innerPropType1.replace("Lcl ", "Lcl_");
      if (innerPropType1 === "Color" || innerPropType1 === "ColorRGB" || innerPropType1 === "Vector" || innerPropType1 === "Vector3D" || innerPropType1.indexOf("Lcl_") === 0) {
        innerPropValue = [subNode.propertyList[4], subNode.propertyList[5], subNode.propertyList[6]];
      } else {
        innerPropValue = subNode.propertyList[4];
      }
      node[innerPropName] = {
        type: innerPropType1,
        type2: innerPropType2,
        flag: innerPropFlag,
        value: innerPropValue
      };
    } else if (node[subNode.name] === void 0) {
      if (typeof subNode.id === "number") {
        node[subNode.name] = {};
        node[subNode.name][subNode.id] = subNode;
      } else {
        node[subNode.name] = subNode;
      }
    } else {
      if (subNode.name === "PoseNode") {
        if (!Array.isArray(node[subNode.name])) {
          node[subNode.name] = [node[subNode.name]];
        }
        node[subNode.name].push(subNode);
      } else if (node[subNode.name][subNode.id] === void 0) {
        node[subNode.name][subNode.id] = subNode;
      }
    }
  }
  parseProperty(reader) {
    const type = reader.getString(1);
    let length;
    switch (type) {
      case "C":
        return reader.getBoolean();
      case "D":
        return reader.getFloat64();
      case "F":
        return reader.getFloat32();
      case "I":
        return reader.getInt32();
      case "L":
        return reader.getInt64();
      case "R":
        length = reader.getUint32();
        return reader.getArrayBuffer(length);
      case "S":
        length = reader.getUint32();
        return reader.getString(length);
      case "Y":
        return reader.getInt16();
      case "b":
      case "c":
      case "d":
      case "f":
      case "i":
      case "l":
        const arrayLength = reader.getUint32();
        const encoding = reader.getUint32();
        const compressedLength = reader.getUint32();
        if (encoding === 0) {
          switch (type) {
            case "b":
            case "c":
              return reader.getBooleanArray(arrayLength);
            case "d":
              return reader.getFloat64Array(arrayLength);
            case "f":
              return reader.getFloat32Array(arrayLength);
            case "i":
              return reader.getInt32Array(arrayLength);
            case "l":
              return reader.getInt64Array(arrayLength);
          }
        }
        const data = unzlibSync(new Uint8Array(reader.getArrayBuffer(compressedLength)));
        const reader2 = new BinaryReader(data.buffer);
        switch (type) {
          case "b":
          case "c":
            return reader2.getBooleanArray(arrayLength);
          case "d":
            return reader2.getFloat64Array(arrayLength);
          case "f":
            return reader2.getFloat32Array(arrayLength);
          case "i":
            return reader2.getInt32Array(arrayLength);
          case "l":
            return reader2.getInt64Array(arrayLength);
        }
      default:
        throw new Error("THREE.FBXLoader: Unknown property type " + type);
    }
  }
}
class BinaryReader {
  constructor(buffer, littleEndian) {
    this.dv = new DataView(buffer);
    this.offset = 0;
    this.littleEndian = littleEndian !== void 0 ? littleEndian : true;
  }
  getOffset() {
    return this.offset;
  }
  size() {
    return this.dv.buffer.byteLength;
  }
  skip(length) {
    this.offset += length;
  }
  // seems like true/false representation depends on exporter.
  // true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
  // then sees LSB.
  getBoolean() {
    return (this.getUint8() & 1) === 1;
  }
  getBooleanArray(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getBoolean());
    }
    return a;
  }
  getUint8() {
    const value = this.dv.getUint8(this.offset);
    this.offset += 1;
    return value;
  }
  getInt16() {
    const value = this.dv.getInt16(this.offset, this.littleEndian);
    this.offset += 2;
    return value;
  }
  getInt32() {
    const value = this.dv.getInt32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  getInt32Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getInt32());
    }
    return a;
  }
  getUint32() {
    const value = this.dv.getUint32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  // JavaScript doesn't support 64-bit integer so calculate this here
  // 1 << 32 will return 1 so using multiply operation instead here.
  // There's a possibility that this method returns wrong value if the value
  // is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
  // TODO: safely handle 64-bit integer
  getInt64() {
    let low, high;
    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    }
    if (high & 2147483648) {
      high = ~high & 4294967295;
      low = ~low & 4294967295;
      if (low === 4294967295)
        high = high + 1 & 4294967295;
      low = low + 1 & 4294967295;
      return -(high * 4294967296 + low);
    }
    return high * 4294967296 + low;
  }
  getInt64Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getInt64());
    }
    return a;
  }
  // Note: see getInt64() comment
  getUint64() {
    let low, high;
    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    }
    return high * 4294967296 + low;
  }
  getFloat32() {
    const value = this.dv.getFloat32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  getFloat32Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getFloat32());
    }
    return a;
  }
  getFloat64() {
    const value = this.dv.getFloat64(this.offset, this.littleEndian);
    this.offset += 8;
    return value;
  }
  getFloat64Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getFloat64());
    }
    return a;
  }
  getArrayBuffer(size) {
    const value = this.dv.buffer.slice(this.offset, this.offset + size);
    this.offset += size;
    return value;
  }
  getString(size) {
    let a = [];
    for (let i = 0; i < size; i++) {
      a[i] = this.getUint8();
    }
    const nullByte = a.indexOf(0);
    if (nullByte >= 0)
      a = a.slice(0, nullByte);
    return decodeText(new Uint8Array(a));
  }
}
class FBXTree {
  add(key, val) {
    this[key] = val;
  }
}
function isFbxFormatBinary(buffer) {
  const CORRECT = "Kaydara FBX Binary  \0";
  return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString(buffer, 0, CORRECT.length);
}
function isFbxFormatASCII(text) {
  const CORRECT = [
    "K",
    "a",
    "y",
    "d",
    "a",
    "r",
    "a",
    "\\",
    "F",
    "B",
    "X",
    "\\",
    "B",
    "i",
    "n",
    "a",
    "r",
    "y",
    "\\",
    "\\"
  ];
  let cursor = 0;
  function read(offset) {
    const result = text[offset - 1];
    text = text.slice(cursor + offset);
    cursor++;
    return result;
  }
  for (let i = 0; i < CORRECT.length; ++i) {
    const num = read(1);
    if (num === CORRECT[i]) {
      return false;
    }
  }
  return true;
}
function getFbxVersion(text) {
  const versionRegExp = /FBXVersion: (\d+)/;
  const match = text.match(versionRegExp);
  if (match) {
    const version = parseInt(match[1]);
    return version;
  }
  throw new Error("THREE.FBXLoader: Cannot find the version number for the file given.");
}
function convertFBXTimeToSeconds(time) {
  return time / 46186158e3;
}
const dataArray = [];
function getData(polygonVertexIndex, polygonIndex, vertexIndex, infoObject) {
  let index;
  switch (infoObject.mappingType) {
    case "ByPolygonVertex":
      index = polygonVertexIndex;
      break;
    case "ByPolygon":
      index = polygonIndex;
      break;
    case "ByVertice":
      index = vertexIndex;
      break;
    case "AllSame":
      index = infoObject.indices[0];
      break;
    default:
      console.warn("THREE.FBXLoader: unknown attribute mapping type " + infoObject.mappingType);
  }
  if (infoObject.referenceType === "IndexToDirect")
    index = infoObject.indices[index];
  const from = index * infoObject.dataSize;
  const to = from + infoObject.dataSize;
  return slice(dataArray, infoObject.buffer, from, to);
}
const tempEuler = /* @__PURE__ */ new Euler();
const tempVec = /* @__PURE__ */ new Vector3();
function generateTransform(transformData) {
  const lTranslationM = new Matrix4();
  const lPreRotationM = new Matrix4();
  const lRotationM = new Matrix4();
  const lPostRotationM = new Matrix4();
  const lScalingM = new Matrix4();
  const lScalingPivotM = new Matrix4();
  const lScalingOffsetM = new Matrix4();
  const lRotationOffsetM = new Matrix4();
  const lRotationPivotM = new Matrix4();
  const lParentGX = new Matrix4();
  const lParentLX = new Matrix4();
  const lGlobalT = new Matrix4();
  const inheritType = transformData.inheritType ? transformData.inheritType : 0;
  if (transformData.translation)
    lTranslationM.setPosition(tempVec.fromArray(transformData.translation));
  if (transformData.preRotation) {
    const array = transformData.preRotation.map(MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lPreRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }
  if (transformData.rotation) {
    const array = transformData.rotation.map(MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }
  if (transformData.postRotation) {
    const array = transformData.postRotation.map(MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lPostRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
    lPostRotationM.invert();
  }
  if (transformData.scale)
    lScalingM.scale(tempVec.fromArray(transformData.scale));
  if (transformData.scalingOffset)
    lScalingOffsetM.setPosition(tempVec.fromArray(transformData.scalingOffset));
  if (transformData.scalingPivot)
    lScalingPivotM.setPosition(tempVec.fromArray(transformData.scalingPivot));
  if (transformData.rotationOffset)
    lRotationOffsetM.setPosition(tempVec.fromArray(transformData.rotationOffset));
  if (transformData.rotationPivot)
    lRotationPivotM.setPosition(tempVec.fromArray(transformData.rotationPivot));
  if (transformData.parentMatrixWorld) {
    lParentLX.copy(transformData.parentMatrix);
    lParentGX.copy(transformData.parentMatrixWorld);
  }
  const lLRM = lPreRotationM.clone().multiply(lRotationM).multiply(lPostRotationM);
  const lParentGRM = new Matrix4();
  lParentGRM.extractRotation(lParentGX);
  const lParentTM = new Matrix4();
  lParentTM.copyPosition(lParentGX);
  const lParentGRSM = lParentTM.clone().invert().multiply(lParentGX);
  const lParentGSM = lParentGRM.clone().invert().multiply(lParentGRSM);
  const lLSM = lScalingM;
  const lGlobalRS = new Matrix4();
  if (inheritType === 0) {
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM).multiply(lLSM);
  } else if (inheritType === 1) {
    lGlobalRS.copy(lParentGRM).multiply(lParentGSM).multiply(lLRM).multiply(lLSM);
  } else {
    const lParentLSM = new Matrix4().scale(new Vector3().setFromMatrixScale(lParentLX));
    const lParentLSM_inv = lParentLSM.clone().invert();
    const lParentGSM_noLocal = lParentGSM.clone().multiply(lParentLSM_inv);
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM_noLocal).multiply(lLSM);
  }
  const lRotationPivotM_inv = lRotationPivotM.clone().invert();
  const lScalingPivotM_inv = lScalingPivotM.clone().invert();
  let lTransform = lTranslationM.clone().multiply(lRotationOffsetM).multiply(lRotationPivotM).multiply(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM).multiply(lRotationPivotM_inv).multiply(lScalingOffsetM).multiply(lScalingPivotM).multiply(lScalingM).multiply(lScalingPivotM_inv);
  const lLocalTWithAllPivotAndOffsetInfo = new Matrix4().copyPosition(lTransform);
  const lGlobalTranslation = lParentGX.clone().multiply(lLocalTWithAllPivotAndOffsetInfo);
  lGlobalT.copyPosition(lGlobalTranslation);
  lTransform = lGlobalT.clone().multiply(lGlobalRS);
  lTransform.premultiply(lParentGX.invert());
  return lTransform;
}
function getEulerOrder(order) {
  order = order || 0;
  const enums = [
    "ZYX",
    // -> XYZ extrinsic
    "YZX",
    // -> XZY extrinsic
    "XZY",
    // -> YZX extrinsic
    "ZXY",
    // -> YXZ extrinsic
    "YXZ",
    // -> ZXY extrinsic
    "XYZ"
    // -> ZYX extrinsic
    //'SphericXYZ', // not possible to support
  ];
  if (order === 6) {
    console.warn("THREE.FBXLoader: unsupported Euler Order: Spherical XYZ. Animations and rotations may be incorrect.");
    return enums[0];
  }
  return enums[order];
}
function parseNumberArray(value) {
  const array = value.split(",").map(function(val) {
    return parseFloat(val);
  });
  return array;
}
function convertArrayBufferToString(buffer, from, to) {
  if (from === void 0)
    from = 0;
  if (to === void 0)
    to = buffer.byteLength;
  return decodeText(new Uint8Array(buffer, from, to));
}
function append(a, b) {
  for (let i = 0, j = a.length, l = b.length; i < l; i++, j++) {
    a[j] = b[i];
  }
}
function slice(a, b, from, to) {
  for (let i = from, j = 0; i < to; i++, j++) {
    a[j] = b[i];
  }
  return a;
}
function inject(a1, index, a2) {
  return a1.slice(0, index).concat(a2).concat(a1.slice(index));
}
export {
  FBXLoader
};
//# sourceMappingURL=FBXLoader.js.map