"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
const _object_pattern = /^[og]\s*(.+)?/;
const _material_library_pattern = /^mtllib /;
const _material_use_pattern = /^usemtl /;
const _map_use_pattern = /^usemap /;
const _vA = /* @__PURE__ */ new THREE.Vector3();
const _vB = /* @__PURE__ */ new THREE.Vector3();
const _vC = /* @__PURE__ */ new THREE.Vector3();
const _ab = /* @__PURE__ */ new THREE.Vector3();
const _cb = /* @__PURE__ */ new THREE.Vector3();
function ParserState() {
  const state = {
    objects: [],
    object: {},
    vertices: [],
    normals: [],
    colors: [],
    uvs: [],
    materials: {},
    materialLibraries: [],
    startObject: function(name, fromDeclaration) {
      if (this.object && this.object.fromDeclaration === false) {
        this.object.name = name;
        this.object.fromDeclaration = fromDeclaration !== false;
        return;
      }
      const previousMaterial = this.object && typeof this.object.currentMaterial === "function" ? this.object.currentMaterial() : void 0;
      if (this.object && typeof this.object._finalize === "function") {
        this.object._finalize(true);
      }
      this.object = {
        name: name || "",
        fromDeclaration: fromDeclaration !== false,
        geometry: {
          vertices: [],
          normals: [],
          colors: [],
          uvs: [],
          hasUVIndices: false
        },
        materials: [],
        smooth: true,
        startMaterial: function(name2, libraries) {
          const previous = this._finalize(false);
          if (previous && (previous.inherited || previous.groupCount <= 0)) {
            this.materials.splice(previous.index, 1);
          }
          const material = {
            index: this.materials.length,
            name: name2 || "",
            mtllib: Array.isArray(libraries) && libraries.length > 0 ? libraries[libraries.length - 1] : "",
            smooth: previous !== void 0 ? previous.smooth : this.smooth,
            groupStart: previous !== void 0 ? previous.groupEnd : 0,
            groupEnd: -1,
            groupCount: -1,
            inherited: false,
            clone: function(index) {
              const cloned = {
                index: typeof index === "number" ? index : this.index,
                name: this.name,
                mtllib: this.mtllib,
                smooth: this.smooth,
                groupStart: 0,
                groupEnd: -1,
                groupCount: -1,
                inherited: false
              };
              cloned.clone = this.clone.bind(cloned);
              return cloned;
            }
          };
          this.materials.push(material);
          return material;
        },
        currentMaterial: function() {
          if (this.materials.length > 0) {
            return this.materials[this.materials.length - 1];
          }
          return void 0;
        },
        _finalize: function(end) {
          const lastMultiMaterial = this.currentMaterial();
          if (lastMultiMaterial && lastMultiMaterial.groupEnd === -1) {
            lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
            lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
            lastMultiMaterial.inherited = false;
          }
          if (end && this.materials.length > 1) {
            for (let mi = this.materials.length - 1; mi >= 0; mi--) {
              if (this.materials[mi].groupCount <= 0) {
                this.materials.splice(mi, 1);
              }
            }
          }
          if (end && this.materials.length === 0) {
            this.materials.push({
              name: "",
              smooth: this.smooth
            });
          }
          return lastMultiMaterial;
        }
      };
      if (previousMaterial && previousMaterial.name && typeof previousMaterial.clone === "function") {
        const declared = previousMaterial.clone(0);
        declared.inherited = true;
        this.object.materials.push(declared);
      }
      this.objects.push(this.object);
    },
    finalize: function() {
      if (this.object && typeof this.object._finalize === "function") {
        this.object._finalize(true);
      }
    },
    parseVertexIndex: function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 3) * 3;
    },
    parseNormalIndex: function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 3) * 3;
    },
    parseUVIndex: function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 2) * 2;
    },
    addVertex: function(a, b, c) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
      dst.push(src[b + 0], src[b + 1], src[b + 2]);
      dst.push(src[c + 0], src[c + 1], src[c + 2]);
    },
    addVertexPoint: function(a) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
    },
    addVertexLine: function(a) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
    },
    addNormal: function(a, b, c) {
      const src = this.normals;
      const dst = this.object.geometry.normals;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
      dst.push(src[b + 0], src[b + 1], src[b + 2]);
      dst.push(src[c + 0], src[c + 1], src[c + 2]);
    },
    addFaceNormal: function(a, b, c) {
      const src = this.vertices;
      const dst = this.object.geometry.normals;
      _vA.fromArray(src, a);
      _vB.fromArray(src, b);
      _vC.fromArray(src, c);
      _cb.subVectors(_vC, _vB);
      _ab.subVectors(_vA, _vB);
      _cb.cross(_ab);
      _cb.normalize();
      dst.push(_cb.x, _cb.y, _cb.z);
      dst.push(_cb.x, _cb.y, _cb.z);
      dst.push(_cb.x, _cb.y, _cb.z);
    },
    addColor: function(a, b, c) {
      const src = this.colors;
      const dst = this.object.geometry.colors;
      if (src[a] !== void 0)
        dst.push(src[a + 0], src[a + 1], src[a + 2]);
      if (src[b] !== void 0)
        dst.push(src[b + 0], src[b + 1], src[b + 2]);
      if (src[c] !== void 0)
        dst.push(src[c + 0], src[c + 1], src[c + 2]);
    },
    addUV: function(a, b, c) {
      const src = this.uvs;
      const dst = this.object.geometry.uvs;
      dst.push(src[a + 0], src[a + 1]);
      dst.push(src[b + 0], src[b + 1]);
      dst.push(src[c + 0], src[c + 1]);
    },
    addDefaultUV: function() {
      const dst = this.object.geometry.uvs;
      dst.push(0, 0);
      dst.push(0, 0);
      dst.push(0, 0);
    },
    addUVLine: function(a) {
      const src = this.uvs;
      const dst = this.object.geometry.uvs;
      dst.push(src[a + 0], src[a + 1]);
    },
    addFace: function(a, b, c, ua, ub, uc, na, nb, nc) {
      const vLen = this.vertices.length;
      let ia = this.parseVertexIndex(a, vLen);
      let ib = this.parseVertexIndex(b, vLen);
      let ic = this.parseVertexIndex(c, vLen);
      this.addVertex(ia, ib, ic);
      this.addColor(ia, ib, ic);
      if (na !== void 0 && na !== "") {
        const nLen = this.normals.length;
        ia = this.parseNormalIndex(na, nLen);
        ib = this.parseNormalIndex(nb, nLen);
        ic = this.parseNormalIndex(nc, nLen);
        this.addNormal(ia, ib, ic);
      } else {
        this.addFaceNormal(ia, ib, ic);
      }
      if (ua !== void 0 && ua !== "") {
        const uvLen = this.uvs.length;
        ia = this.parseUVIndex(ua, uvLen);
        ib = this.parseUVIndex(ub, uvLen);
        ic = this.parseUVIndex(uc, uvLen);
        this.addUV(ia, ib, ic);
        this.object.geometry.hasUVIndices = true;
      } else {
        this.addDefaultUV();
      }
    },
    addPointGeometry: function(vertices) {
      this.object.geometry.type = "Points";
      const vLen = this.vertices.length;
      for (let vi = 0, l = vertices.length; vi < l; vi++) {
        const index = this.parseVertexIndex(vertices[vi], vLen);
        this.addVertexPoint(index);
        this.addColor(index);
      }
    },
    addLineGeometry: function(vertices, uvs) {
      this.object.geometry.type = "Line";
      const vLen = this.vertices.length;
      const uvLen = this.uvs.length;
      for (let vi = 0, l = vertices.length; vi < l; vi++) {
        this.addVertexLine(this.parseVertexIndex(vertices[vi], vLen));
      }
      for (let uvi = 0, l = uvs.length; uvi < l; uvi++) {
        this.addUVLine(this.parseUVIndex(uvs[uvi], uvLen));
      }
    }
  };
  state.startObject("", false);
  return state;
}
class OBJLoader extends THREE.Loader {
  constructor(manager) {
    super(manager);
    this.materials = null;
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new THREE.FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(
      url,
      function(text) {
        try {
          onLoad(scope.parse(text));
        } catch (e) {
          if (onError) {
            onError(e);
          } else {
            console.error(e);
          }
          scope.manager.itemError(url);
        }
      },
      onProgress,
      onError
    );
  }
  setMaterials(materials) {
    this.materials = materials;
    return this;
  }
  parse(text) {
    const state = new ParserState();
    if (text.indexOf("\r\n") !== -1) {
      text = text.replace(/\r\n/g, "\n");
    }
    if (text.indexOf("\\\n") !== -1) {
      text = text.replace(/\\\n/g, "");
    }
    const lines = text.split("\n");
    let line = "", lineFirstChar = "";
    let lineLength = 0;
    let result = [];
    const trimLeft = typeof "".trimLeft === "function";
    for (let i = 0, l = lines.length; i < l; i++) {
      line = lines[i];
      line = trimLeft ? line.trimLeft() : line.trim();
      lineLength = line.length;
      if (lineLength === 0)
        continue;
      lineFirstChar = line.charAt(0);
      if (lineFirstChar === "#")
        continue;
      if (lineFirstChar === "v") {
        const data = line.split(/\s+/);
        switch (data[0]) {
          case "v":
            state.vertices.push(parseFloat(data[1]), parseFloat(data[2]), parseFloat(data[3]));
            if (data.length >= 7) {
              state.colors.push(parseFloat(data[4]), parseFloat(data[5]), parseFloat(data[6]));
            } else {
              state.colors.push(void 0, void 0, void 0);
            }
            break;
          case "vn":
            state.normals.push(parseFloat(data[1]), parseFloat(data[2]), parseFloat(data[3]));
            break;
          case "vt":
            state.uvs.push(parseFloat(data[1]), parseFloat(data[2]));
            break;
        }
      } else if (lineFirstChar === "f") {
        const lineData = line.substr(1).trim();
        const vertexData = lineData.split(/\s+/);
        const faceVertices = [];
        for (let j = 0, jl = vertexData.length; j < jl; j++) {
          const vertex = vertexData[j];
          if (vertex.length > 0) {
            const vertexParts = vertex.split("/");
            faceVertices.push(vertexParts);
          }
        }
        const v1 = faceVertices[0];
        for (let j = 1, jl = faceVertices.length - 1; j < jl; j++) {
          const v2 = faceVertices[j];
          const v3 = faceVertices[j + 1];
          state.addFace(v1[0], v2[0], v3[0], v1[1], v2[1], v3[1], v1[2], v2[2], v3[2]);
        }
      } else if (lineFirstChar === "l") {
        const lineParts = line.substring(1).trim().split(" ");
        let lineVertices = [];
        const lineUVs = [];
        if (line.indexOf("/") === -1) {
          lineVertices = lineParts;
        } else {
          for (let li = 0, llen = lineParts.length; li < llen; li++) {
            const parts = lineParts[li].split("/");
            if (parts[0] !== "")
              lineVertices.push(parts[0]);
            if (parts[1] !== "")
              lineUVs.push(parts[1]);
          }
        }
        state.addLineGeometry(lineVertices, lineUVs);
      } else if (lineFirstChar === "p") {
        const lineData = line.substr(1).trim();
        const pointData = lineData.split(" ");
        state.addPointGeometry(pointData);
      } else if ((result = _object_pattern.exec(line)) !== null) {
        const name = (" " + result[0].substr(1).trim()).substr(1);
        state.startObject(name);
      } else if (_material_use_pattern.test(line)) {
        state.object.startMaterial(line.substring(7).trim(), state.materialLibraries);
      } else if (_material_library_pattern.test(line)) {
        state.materialLibraries.push(line.substring(7).trim());
      } else if (_map_use_pattern.test(line)) {
        console.warn(
          'THREE.OBJLoader: Rendering identifier "usemap" not supported. Textures must be defined in MTL files.'
        );
      } else if (lineFirstChar === "s") {
        result = line.split(" ");
        if (result.length > 1) {
          const value = result[1].trim().toLowerCase();
          state.object.smooth = value !== "0" && value !== "off";
        } else {
          state.object.smooth = true;
        }
        const material = state.object.currentMaterial();
        if (material)
          material.smooth = state.object.smooth;
      } else {
        if (line === "\0")
          continue;
        console.warn('THREE.OBJLoader: Unexpected line: "' + line + '"');
      }
    }
    state.finalize();
    const container = new THREE.Group();
    container.materialLibraries = [].concat(state.materialLibraries);
    const hasPrimitives = !(state.objects.length === 1 && state.objects[0].geometry.vertices.length === 0);
    if (hasPrimitives === true) {
      for (let i = 0, l = state.objects.length; i < l; i++) {
        const object = state.objects[i];
        const geometry = object.geometry;
        const materials = object.materials;
        const isLine = geometry.type === "Line";
        const isPoints = geometry.type === "Points";
        let hasVertexColors = false;
        if (geometry.vertices.length === 0)
          continue;
        const buffergeometry = new THREE.BufferGeometry();
        buffergeometry.setAttribute("position", new THREE.Float32BufferAttribute(geometry.vertices, 3));
        if (geometry.normals.length > 0) {
          buffergeometry.setAttribute("normal", new THREE.Float32BufferAttribute(geometry.normals, 3));
        }
        if (geometry.colors.length > 0) {
          hasVertexColors = true;
          buffergeometry.setAttribute("color", new THREE.Float32BufferAttribute(geometry.colors, 3));
        }
        if (geometry.hasUVIndices === true) {
          buffergeometry.setAttribute("uv", new THREE.Float32BufferAttribute(geometry.uvs, 2));
        }
        const createdMaterials = [];
        for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
          const sourceMaterial = materials[mi];
          const materialHash = sourceMaterial.name + "_" + sourceMaterial.smooth + "_" + hasVertexColors;
          let material = state.materials[materialHash];
          if (this.materials !== null) {
            material = this.materials.create(sourceMaterial.name);
            if (isLine && material && !(material instanceof THREE.LineBasicMaterial)) {
              const materialLine = new THREE.LineBasicMaterial();
              THREE.Material.prototype.copy.call(materialLine, material);
              materialLine.color.copy(material.color);
              material = materialLine;
            } else if (isPoints && material && !(material instanceof THREE.PointsMaterial)) {
              const materialPoints = new THREE.PointsMaterial({ size: 10, sizeAttenuation: false });
              THREE.Material.prototype.copy.call(materialPoints, material);
              materialPoints.color.copy(material.color);
              materialPoints.map = material.map;
              material = materialPoints;
            }
          }
          if (material === void 0) {
            if (isLine) {
              material = new THREE.LineBasicMaterial();
            } else if (isPoints) {
              material = new THREE.PointsMaterial({ size: 1, sizeAttenuation: false });
            } else {
              material = new THREE.MeshPhongMaterial();
            }
            material.name = sourceMaterial.name;
            material.flatShading = sourceMaterial.smooth ? false : true;
            material.vertexColors = hasVertexColors;
            state.materials[materialHash] = material;
          }
          createdMaterials.push(material);
        }
        let mesh;
        if (createdMaterials.length > 1) {
          for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
            const sourceMaterial = materials[mi];
            buffergeometry.addGroup(sourceMaterial.groupStart, sourceMaterial.groupCount, mi);
          }
          if (isLine) {
            mesh = new THREE.LineSegments(buffergeometry, createdMaterials);
          } else if (isPoints) {
            mesh = new THREE.Points(buffergeometry, createdMaterials);
          } else {
            mesh = new THREE.Mesh(buffergeometry, createdMaterials);
          }
        } else {
          if (isLine) {
            mesh = new THREE.LineSegments(buffergeometry, createdMaterials[0]);
          } else if (isPoints) {
            mesh = new THREE.Points(buffergeometry, createdMaterials[0]);
          } else {
            mesh = new THREE.Mesh(buffergeometry, createdMaterials[0]);
          }
        }
        mesh.name = object.name;
        container.add(mesh);
      }
    } else {
      if (state.vertices.length > 0) {
        const material = new THREE.PointsMaterial({ size: 1, sizeAttenuation: false });
        const buffergeometry = new THREE.BufferGeometry();
        buffergeometry.setAttribute("position", new THREE.Float32BufferAttribute(state.vertices, 3));
        if (state.colors.length > 0 && state.colors[0] !== void 0) {
          buffergeometry.setAttribute("color", new THREE.Float32BufferAttribute(state.colors, 3));
          material.vertexColors = true;
        }
        const points = new THREE.Points(buffergeometry, material);
        container.add(points);
      }
    }
    return container;
  }
}
exports.OBJLoader = OBJLoader;
//# sourceMappingURL=OBJLoader.cjs.map