(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "three"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("three"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.three);
    global.MarchingCubes = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _three) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.triTable = _exports.edgeTable = _exports.MarchingCubes = void 0;

  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } Object.defineProperty(subClass, "prototype", { value: Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }), writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }

  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

  function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

  function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

  /**
   * Port of http://webglsamples.org/blob/blob.html
   */
  var MarchingCubes = /*#__PURE__*/function (_Mesh) {
    _inherits(MarchingCubes, _Mesh);

    var _super = _createSuper(MarchingCubes);

    function MarchingCubes(resolution, material) {
      var _this;

      var enableUvs = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
      var enableColors = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
      var maxPolyCount = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 10000;

      _classCallCheck(this, MarchingCubes);

      var geometry = new _three.BufferGeometry();
      _this = _super.call(this, geometry, material);

      var scope = _assertThisInitialized(_this); // temp buffers used in polygonize


      var vlist = new Float32Array(12 * 3);
      var nlist = new Float32Array(12 * 3);
      var clist = new Float32Array(12 * 3);
      _this.enableUvs = enableUvs;
      _this.enableColors = enableColors; // functions have to be object properties
      // prototype functions kill performance
      // (tested and it was 4x slower !!!)

      _this.init = function (resolution) {
        this.resolution = resolution; // parameters

        this.isolation = 80.0; // size of field, 32 is pushing it in Javascript :)

        this.size = resolution;
        this.size2 = this.size * this.size;
        this.size3 = this.size2 * this.size;
        this.halfsize = this.size / 2.0; // deltas

        this.delta = 2.0 / this.size;
        this.yd = this.size;
        this.zd = this.size2;
        this.field = new Float32Array(this.size3);
        this.normal_cache = new Float32Array(this.size3 * 3);
        this.palette = new Float32Array(this.size3 * 3); //

        this.count = 0;
        var maxVertexCount = maxPolyCount * 3;
        this.positionArray = new Float32Array(maxVertexCount * 3);
        var positionAttribute = new _three.BufferAttribute(this.positionArray, 3);
        positionAttribute.setUsage(_three.DynamicDrawUsage);
        geometry.setAttribute('position', positionAttribute);
        this.normalArray = new Float32Array(maxVertexCount * 3);
        var normalAttribute = new _three.BufferAttribute(this.normalArray, 3);
        normalAttribute.setUsage(_three.DynamicDrawUsage);
        geometry.setAttribute('normal', normalAttribute);

        if (this.enableUvs) {
          this.uvArray = new Float32Array(maxVertexCount * 2);
          var uvAttribute = new _three.BufferAttribute(this.uvArray, 2);
          uvAttribute.setUsage(_three.DynamicDrawUsage);
          geometry.setAttribute('uv', uvAttribute);
        }

        if (this.enableColors) {
          this.colorArray = new Float32Array(maxVertexCount * 3);
          var colorAttribute = new _three.BufferAttribute(this.colorArray, 3);
          colorAttribute.setUsage(_three.DynamicDrawUsage);
          geometry.setAttribute('color', colorAttribute);
        }
      }; ///////////////////////
      // Polygonization
      ///////////////////////


      function lerp(a, b, t) {
        return a + (b - a) * t;
      }

      function VIntX(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
        var mu = (isol - valp1) / (valp2 - valp1),
            nc = scope.normal_cache;
        vlist[offset + 0] = x + mu * scope.delta;
        vlist[offset + 1] = y;
        vlist[offset + 2] = z;
        nlist[offset + 0] = lerp(nc[q + 0], nc[q + 3], mu);
        nlist[offset + 1] = lerp(nc[q + 1], nc[q + 4], mu);
        nlist[offset + 2] = lerp(nc[q + 2], nc[q + 5], mu);
        clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
        clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
        clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
      }

      function VIntY(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
        var mu = (isol - valp1) / (valp2 - valp1),
            nc = scope.normal_cache;
        vlist[offset + 0] = x;
        vlist[offset + 1] = y + mu * scope.delta;
        vlist[offset + 2] = z;
        var q2 = q + scope.yd * 3;
        nlist[offset + 0] = lerp(nc[q + 0], nc[q2 + 0], mu);
        nlist[offset + 1] = lerp(nc[q + 1], nc[q2 + 1], mu);
        nlist[offset + 2] = lerp(nc[q + 2], nc[q2 + 2], mu);
        clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
        clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
        clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
      }

      function VIntZ(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
        var mu = (isol - valp1) / (valp2 - valp1),
            nc = scope.normal_cache;
        vlist[offset + 0] = x;
        vlist[offset + 1] = y;
        vlist[offset + 2] = z + mu * scope.delta;
        var q2 = q + scope.zd * 3;
        nlist[offset + 0] = lerp(nc[q + 0], nc[q2 + 0], mu);
        nlist[offset + 1] = lerp(nc[q + 1], nc[q2 + 1], mu);
        nlist[offset + 2] = lerp(nc[q + 2], nc[q2 + 2], mu);
        clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
        clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
        clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
      }

      function compNorm(q) {
        var q3 = q * 3;

        if (scope.normal_cache[q3] === 0.0) {
          scope.normal_cache[q3 + 0] = scope.field[q - 1] - scope.field[q + 1];
          scope.normal_cache[q3 + 1] = scope.field[q - scope.yd] - scope.field[q + scope.yd];
          scope.normal_cache[q3 + 2] = scope.field[q - scope.zd] - scope.field[q + scope.zd];
        }
      } // Returns total number of triangles. Fills triangles.
      // (this is where most of time is spent - it's inner work of O(n3) loop )


      function polygonize(fx, fy, fz, q, isol) {
        // cache indices
        var q1 = q + 1,
            qy = q + scope.yd,
            qz = q + scope.zd,
            q1y = q1 + scope.yd,
            q1z = q1 + scope.zd,
            qyz = q + scope.yd + scope.zd,
            q1yz = q1 + scope.yd + scope.zd;
        var cubeindex = 0;
        var field0 = scope.field[q],
            field1 = scope.field[q1],
            field2 = scope.field[qy],
            field3 = scope.field[q1y],
            field4 = scope.field[qz],
            field5 = scope.field[q1z],
            field6 = scope.field[qyz],
            field7 = scope.field[q1yz];
        if (field0 < isol) cubeindex |= 1;
        if (field1 < isol) cubeindex |= 2;
        if (field2 < isol) cubeindex |= 8;
        if (field3 < isol) cubeindex |= 4;
        if (field4 < isol) cubeindex |= 16;
        if (field5 < isol) cubeindex |= 32;
        if (field6 < isol) cubeindex |= 128;
        if (field7 < isol) cubeindex |= 64; // if cube is entirely in/out of the surface - bail, nothing to draw

        var bits = edgeTable[cubeindex];
        if (bits === 0) return 0;
        var d = scope.delta,
            fx2 = fx + d,
            fy2 = fy + d,
            fz2 = fz + d; // top of the cube

        if (bits & 1) {
          compNorm(q);
          compNorm(q1);
          VIntX(q * 3, 0, isol, fx, fy, fz, field0, field1, q, q1);
        }

        if (bits & 2) {
          compNorm(q1);
          compNorm(q1y);
          VIntY(q1 * 3, 3, isol, fx2, fy, fz, field1, field3, q1, q1y);
        }

        if (bits & 4) {
          compNorm(qy);
          compNorm(q1y);
          VIntX(qy * 3, 6, isol, fx, fy2, fz, field2, field3, qy, q1y);
        }

        if (bits & 8) {
          compNorm(q);
          compNorm(qy);
          VIntY(q * 3, 9, isol, fx, fy, fz, field0, field2, q, qy);
        } // bottom of the cube


        if (bits & 16) {
          compNorm(qz);
          compNorm(q1z);
          VIntX(qz * 3, 12, isol, fx, fy, fz2, field4, field5, qz, q1z);
        }

        if (bits & 32) {
          compNorm(q1z);
          compNorm(q1yz);
          VIntY(q1z * 3, 15, isol, fx2, fy, fz2, field5, field7, q1z, q1yz);
        }

        if (bits & 64) {
          compNorm(qyz);
          compNorm(q1yz);
          VIntX(qyz * 3, 18, isol, fx, fy2, fz2, field6, field7, qyz, q1yz);
        }

        if (bits & 128) {
          compNorm(qz);
          compNorm(qyz);
          VIntY(qz * 3, 21, isol, fx, fy, fz2, field4, field6, qz, qyz);
        } // vertical lines of the cube


        if (bits & 256) {
          compNorm(q);
          compNorm(qz);
          VIntZ(q * 3, 24, isol, fx, fy, fz, field0, field4, q, qz);
        }

        if (bits & 512) {
          compNorm(q1);
          compNorm(q1z);
          VIntZ(q1 * 3, 27, isol, fx2, fy, fz, field1, field5, q1, q1z);
        }

        if (bits & 1024) {
          compNorm(q1y);
          compNorm(q1yz);
          VIntZ(q1y * 3, 30, isol, fx2, fy2, fz, field3, field7, q1y, q1yz);
        }

        if (bits & 2048) {
          compNorm(qy);
          compNorm(qyz);
          VIntZ(qy * 3, 33, isol, fx, fy2, fz, field2, field6, qy, qyz);
        }

        cubeindex <<= 4; // re-purpose cubeindex into an offset into triTable

        var o1,
            o2,
            o3,
            numtris = 0,
            i = 0; // here is where triangles are created

        while (triTable[cubeindex + i] != -1) {
          o1 = cubeindex + i;
          o2 = o1 + 1;
          o3 = o1 + 2;
          posnormtriv(vlist, nlist, clist, 3 * triTable[o1], 3 * triTable[o2], 3 * triTable[o3]);
          i += 3;
          numtris++;
        }

        return numtris;
      }

      function posnormtriv(pos, norm, colors, o1, o2, o3) {
        var c = scope.count * 3; // positions

        scope.positionArray[c + 0] = pos[o1];
        scope.positionArray[c + 1] = pos[o1 + 1];
        scope.positionArray[c + 2] = pos[o1 + 2];
        scope.positionArray[c + 3] = pos[o2];
        scope.positionArray[c + 4] = pos[o2 + 1];
        scope.positionArray[c + 5] = pos[o2 + 2];
        scope.positionArray[c + 6] = pos[o3];
        scope.positionArray[c + 7] = pos[o3 + 1];
        scope.positionArray[c + 8] = pos[o3 + 2]; // normals

        if (scope.material.flatShading === true) {
          var nx = (norm[o1 + 0] + norm[o2 + 0] + norm[o3 + 0]) / 3;
          var ny = (norm[o1 + 1] + norm[o2 + 1] + norm[o3 + 1]) / 3;
          var nz = (norm[o1 + 2] + norm[o2 + 2] + norm[o3 + 2]) / 3;
          scope.normalArray[c + 0] = nx;
          scope.normalArray[c + 1] = ny;
          scope.normalArray[c + 2] = nz;
          scope.normalArray[c + 3] = nx;
          scope.normalArray[c + 4] = ny;
          scope.normalArray[c + 5] = nz;
          scope.normalArray[c + 6] = nx;
          scope.normalArray[c + 7] = ny;
          scope.normalArray[c + 8] = nz;
        } else {
          scope.normalArray[c + 0] = norm[o1 + 0];
          scope.normalArray[c + 1] = norm[o1 + 1];
          scope.normalArray[c + 2] = norm[o1 + 2];
          scope.normalArray[c + 3] = norm[o2 + 0];
          scope.normalArray[c + 4] = norm[o2 + 1];
          scope.normalArray[c + 5] = norm[o2 + 2];
          scope.normalArray[c + 6] = norm[o3 + 0];
          scope.normalArray[c + 7] = norm[o3 + 1];
          scope.normalArray[c + 8] = norm[o3 + 2];
        } // uvs


        if (scope.enableUvs) {
          var d = scope.count * 2;
          scope.uvArray[d + 0] = pos[o1 + 0];
          scope.uvArray[d + 1] = pos[o1 + 2];
          scope.uvArray[d + 2] = pos[o2 + 0];
          scope.uvArray[d + 3] = pos[o2 + 2];
          scope.uvArray[d + 4] = pos[o3 + 0];
          scope.uvArray[d + 5] = pos[o3 + 2];
        } // colors


        if (scope.enableColors) {
          scope.colorArray[c + 0] = colors[o1 + 0];
          scope.colorArray[c + 1] = colors[o1 + 1];
          scope.colorArray[c + 2] = colors[o1 + 2];
          scope.colorArray[c + 3] = colors[o2 + 0];
          scope.colorArray[c + 4] = colors[o2 + 1];
          scope.colorArray[c + 5] = colors[o2 + 2];
          scope.colorArray[c + 6] = colors[o3 + 0];
          scope.colorArray[c + 7] = colors[o3 + 1];
          scope.colorArray[c + 8] = colors[o3 + 2];
        }

        scope.count += 3;
      } /////////////////////////////////////
      // Metaballs
      /////////////////////////////////////
      // Adds a reciprocal ball (nice and blobby) that, to be fast, fades to zero after
      // a fixed distance, determined by strength and subtract.


      _this.addBall = function (ballx, bally, ballz, strength, subtract, colors) {
        var sign = Math.sign(strength);
        strength = Math.abs(strength);
        var userDefineColor = !(colors === undefined || colors === null);
        var ballColor = new _three.Color(ballx, bally, ballz);

        if (userDefineColor) {
          try {
            ballColor = colors instanceof _three.Color ? colors : Array.isArray(colors) ? new _three.Color(Math.min(Math.abs(colors[0]), 1), Math.min(Math.abs(colors[1]), 1), Math.min(Math.abs(colors[2]), 1)) : new _three.Color(colors);
          } catch (err) {
            ballColor = new _three.Color(ballx, bally, ballz);
          }
        } // Let's solve the equation to find the radius:
        // 1.0 / (0.000001 + radius^2) * strength - subtract = 0
        // strength / (radius^2) = subtract
        // strength = subtract * radius^2
        // radius^2 = strength / subtract
        // radius = sqrt(strength / subtract)


        var radius = this.size * Math.sqrt(strength / subtract),
            zs = ballz * this.size,
            ys = bally * this.size,
            xs = ballx * this.size;
        var min_z = Math.floor(zs - radius);
        if (min_z < 1) min_z = 1;
        var max_z = Math.floor(zs + radius);
        if (max_z > this.size - 1) max_z = this.size - 1;
        var min_y = Math.floor(ys - radius);
        if (min_y < 1) min_y = 1;
        var max_y = Math.floor(ys + radius);
        if (max_y > this.size - 1) max_y = this.size - 1;
        var min_x = Math.floor(xs - radius);
        if (min_x < 1) min_x = 1;
        var max_x = Math.floor(xs + radius);
        if (max_x > this.size - 1) max_x = this.size - 1; // Don't polygonize in the outer layer because normals aren't
        // well-defined there.

        var x, y, z, y_offset, z_offset, fx, fy, fz, fz2, fy2, val;

        for (z = min_z; z < max_z; z++) {
          z_offset = this.size2 * z;
          fz = z / this.size - ballz;
          fz2 = fz * fz;

          for (y = min_y; y < max_y; y++) {
            y_offset = z_offset + this.size * y;
            fy = y / this.size - bally;
            fy2 = fy * fy;

            for (x = min_x; x < max_x; x++) {
              fx = x / this.size - ballx;
              val = strength / (0.000001 + fx * fx + fy2 + fz2) - subtract;

              if (val > 0.0) {
                this.field[y_offset + x] += val * sign; // optimization
                // http://www.geisswerks.com/ryan/BLOBS/blobs.html

                var ratio = Math.sqrt((x - xs) * (x - xs) + (y - ys) * (y - ys) + (z - zs) * (z - zs)) / radius;
                var contrib = 1 - ratio * ratio * ratio * (ratio * (ratio * 6 - 15) + 10);
                this.palette[(y_offset + x) * 3 + 0] += ballColor.r * contrib;
                this.palette[(y_offset + x) * 3 + 1] += ballColor.g * contrib;
                this.palette[(y_offset + x) * 3 + 2] += ballColor.b * contrib;
              }
            }
          }
        }
      };

      _this.addPlaneX = function (strength, subtract) {
        // cache attribute lookups
        var size = this.size,
            yd = this.yd,
            zd = this.zd,
            field = this.field;
        var x,
            y,
            z,
            xx,
            val,
            xdiv,
            cxy,
            dist = size * Math.sqrt(strength / subtract);
        if (dist > size) dist = size;

        for (x = 0; x < dist; x++) {
          xdiv = x / size;
          xx = xdiv * xdiv;
          val = strength / (0.0001 + xx) - subtract;

          if (val > 0.0) {
            for (y = 0; y < size; y++) {
              cxy = x + y * yd;

              for (z = 0; z < size; z++) {
                field[zd * z + cxy] += val;
              }
            }
          }
        }
      };

      _this.addPlaneY = function (strength, subtract) {
        // cache attribute lookups
        var size = this.size,
            yd = this.yd,
            zd = this.zd,
            field = this.field;
        var x,
            y,
            z,
            yy,
            val,
            ydiv,
            cy,
            cxy,
            dist = size * Math.sqrt(strength / subtract);
        if (dist > size) dist = size;

        for (y = 0; y < dist; y++) {
          ydiv = y / size;
          yy = ydiv * ydiv;
          val = strength / (0.0001 + yy) - subtract;

          if (val > 0.0) {
            cy = y * yd;

            for (x = 0; x < size; x++) {
              cxy = cy + x;

              for (z = 0; z < size; z++) {
                field[zd * z + cxy] += val;
              }
            }
          }
        }
      };

      _this.addPlaneZ = function (strength, subtract) {
        // cache attribute lookups
        var size = this.size,
            yd = this.yd,
            zd = this.zd,
            field = this.field;
        var x,
            y,
            z,
            zz,
            val,
            zdiv,
            cz,
            cyz,
            dist = size * Math.sqrt(strength / subtract);
        if (dist > size) dist = size;

        for (z = 0; z < dist; z++) {
          zdiv = z / size;
          zz = zdiv * zdiv;
          val = strength / (0.0001 + zz) - subtract;

          if (val > 0.0) {
            cz = zd * z;

            for (y = 0; y < size; y++) {
              cyz = cz + y * yd;

              for (x = 0; x < size; x++) {
                field[cyz + x] += val;
              }
            }
          }
        }
      }; /////////////////////////////////////
      // Updates
      /////////////////////////////////////


      _this.setCell = function (x, y, z, value) {
        var index = this.size2 * z + this.size * y + x;
        this.field[index] = value;
      };

      _this.getCell = function (x, y, z) {
        var index = this.size2 * z + this.size * y + x;
        return this.field[index];
      };

      _this.blur = function () {
        var intensity = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1;
        var field = this.field;
        var fieldCopy = field.slice();
        var size = this.size;
        var size2 = this.size2;

        for (var x = 0; x < size; x++) {
          for (var y = 0; y < size; y++) {
            for (var z = 0; z < size; z++) {
              var index = size2 * z + size * y + x;
              var val = fieldCopy[index];
              var count = 1;

              for (var x2 = -1; x2 <= 1; x2 += 2) {
                var x3 = x2 + x;
                if (x3 < 0 || x3 >= size) continue;

                for (var y2 = -1; y2 <= 1; y2 += 2) {
                  var y3 = y2 + y;
                  if (y3 < 0 || y3 >= size) continue;

                  for (var z2 = -1; z2 <= 1; z2 += 2) {
                    var z3 = z2 + z;
                    if (z3 < 0 || z3 >= size) continue;
                    var index2 = size2 * z3 + size * y3 + x3;
                    var val2 = fieldCopy[index2];
                    count++;
                    val += intensity * (val2 - val) / count;
                  }
                }
              }

              field[index] = val;
            }
          }
        }
      };

      _this.reset = function () {
        // wipe the normal cache
        for (var i = 0; i < this.size3; i++) {
          this.normal_cache[i * 3] = 0.0;
          this.field[i] = 0.0;
          this.palette[i * 3] = this.palette[i * 3 + 1] = this.palette[i * 3 + 2] = 0.0;
        }
      };

      _this.onBeforeRender = function () {
        this.count = 0; // Triangulate. Yeah, this is slow.

        var smin2 = this.size - 2;

        for (var z = 1; z < smin2; z++) {
          var z_offset = this.size2 * z;
          var fz = (z - this.halfsize) / this.halfsize; //+ 1

          for (var y = 1; y < smin2; y++) {
            var y_offset = z_offset + this.size * y;
            var fy = (y - this.halfsize) / this.halfsize; //+ 1

            for (var x = 1; x < smin2; x++) {
              var fx = (x - this.halfsize) / this.halfsize; //+ 1

              var q = y_offset + x;
              polygonize(fx, fy, fz, q, this.isolation);
            }
          }
        } // reset unneeded data


        for (var i = this.count * 3; i < this.positionArray.length; i++) {
          this.positionArray[i] = 0.0;
        } // update geometry data


        geometry.getAttribute('position').needsUpdate = true;
        geometry.getAttribute('normal').needsUpdate = true;
        if (this.enableUvs) geometry.getAttribute('uv').needsUpdate = true;
        if (this.enableColors) geometry.getAttribute('color').needsUpdate = true; // safety check

        if (this.count / 3 > maxPolyCount) console.warn('THREE.MarchingCubes: Geometry buffers too small for rendering. Please create an instance with a higher poly count.');
      };

      _this.init(resolution);

      return _this;
    }

    return _createClass(MarchingCubes);
  }(_three.Mesh);

  _exports.MarchingCubes = MarchingCubes;
  MarchingCubes.prototype.isMarchingCubes = true; /////////////////////////////////////
  // Marching cubes lookup tables
  /////////////////////////////////////
  // These tables are straight from Paul Bourke's page:
  // http://paulbourke.net/geometry/polygonise/
  // who in turn got them from Cory Gene Bloyd.

  var edgeTable = new Int32Array([0x0, 0x109, 0x203, 0x30a, 0x406, 0x50f, 0x605, 0x70c, 0x80c, 0x905, 0xa0f, 0xb06, 0xc0a, 0xd03, 0xe09, 0xf00, 0x190, 0x99, 0x393, 0x29a, 0x596, 0x49f, 0x795, 0x69c, 0x99c, 0x895, 0xb9f, 0xa96, 0xd9a, 0xc93, 0xf99, 0xe90, 0x230, 0x339, 0x33, 0x13a, 0x636, 0x73f, 0x435, 0x53c, 0xa3c, 0xb35, 0x83f, 0x936, 0xe3a, 0xf33, 0xc39, 0xd30, 0x3a0, 0x2a9, 0x1a3, 0xaa, 0x7a6, 0x6af, 0x5a5, 0x4ac, 0xbac, 0xaa5, 0x9af, 0x8a6, 0xfaa, 0xea3, 0xda9, 0xca0, 0x460, 0x569, 0x663, 0x76a, 0x66, 0x16f, 0x265, 0x36c, 0xc6c, 0xd65, 0xe6f, 0xf66, 0x86a, 0x963, 0xa69, 0xb60, 0x5f0, 0x4f9, 0x7f3, 0x6fa, 0x1f6, 0xff, 0x3f5, 0x2fc, 0xdfc, 0xcf5, 0xfff, 0xef6, 0x9fa, 0x8f3, 0xbf9, 0xaf0, 0x650, 0x759, 0x453, 0x55a, 0x256, 0x35f, 0x55, 0x15c, 0xe5c, 0xf55, 0xc5f, 0xd56, 0xa5a, 0xb53, 0x859, 0x950, 0x7c0, 0x6c9, 0x5c3, 0x4ca, 0x3c6, 0x2cf, 0x1c5, 0xcc, 0xfcc, 0xec5, 0xdcf, 0xcc6, 0xbca, 0xac3, 0x9c9, 0x8c0, 0x8c0, 0x9c9, 0xac3, 0xbca, 0xcc6, 0xdcf, 0xec5, 0xfcc, 0xcc, 0x1c5, 0x2cf, 0x3c6, 0x4ca, 0x5c3, 0x6c9, 0x7c0, 0x950, 0x859, 0xb53, 0xa5a, 0xd56, 0xc5f, 0xf55, 0xe5c, 0x15c, 0x55, 0x35f, 0x256, 0x55a, 0x453, 0x759, 0x650, 0xaf0, 0xbf9, 0x8f3, 0x9fa, 0xef6, 0xfff, 0xcf5, 0xdfc, 0x2fc, 0x3f5, 0xff, 0x1f6, 0x6fa, 0x7f3, 0x4f9, 0x5f0, 0xb60, 0xa69, 0x963, 0x86a, 0xf66, 0xe6f, 0xd65, 0xc6c, 0x36c, 0x265, 0x16f, 0x66, 0x76a, 0x663, 0x569, 0x460, 0xca0, 0xda9, 0xea3, 0xfaa, 0x8a6, 0x9af, 0xaa5, 0xbac, 0x4ac, 0x5a5, 0x6af, 0x7a6, 0xaa, 0x1a3, 0x2a9, 0x3a0, 0xd30, 0xc39, 0xf33, 0xe3a, 0x936, 0x83f, 0xb35, 0xa3c, 0x53c, 0x435, 0x73f, 0x636, 0x13a, 0x33, 0x339, 0x230, 0xe90, 0xf99, 0xc93, 0xd9a, 0xa96, 0xb9f, 0x895, 0x99c, 0x69c, 0x795, 0x49f, 0x596, 0x29a, 0x393, 0x99, 0x190, 0xf00, 0xe09, 0xd03, 0xc0a, 0xb06, 0xa0f, 0x905, 0x80c, 0x70c, 0x605, 0x50f, 0x406, 0x30a, 0x203, 0x109, 0x0]);
  _exports.edgeTable = edgeTable;
  var triTable = new Int32Array([-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 8, 3, 9, 8, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 8, 3, 1, 2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 2, 10, 0, 2, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2, 8, 3, 2, 10, 8, 10, 9, 8, -1, -1, -1, -1, -1, -1, -1, 3, 11, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 11, 2, 8, 11, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 9, 0, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 11, 2, 1, 9, 11, 9, 8, 11, -1, -1, -1, -1, -1, -1, -1, 3, 10, 1, 11, 10, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 10, 1, 0, 8, 10, 8, 11, 10, -1, -1, -1, -1, -1, -1, -1, 3, 9, 0, 3, 11, 9, 11, 10, 9, -1, -1, -1, -1, -1, -1, -1, 9, 8, 10, 10, 8, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4, 3, 0, 7, 3, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 9, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4, 1, 9, 4, 7, 1, 7, 3, 1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 10, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3, 4, 7, 3, 0, 4, 1, 2, 10, -1, -1, -1, -1, -1, -1, -1, 9, 2, 10, 9, 0, 2, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, 2, 10, 9, 2, 9, 7, 2, 7, 3, 7, 9, 4, -1, -1, -1, -1, 8, 4, 7, 3, 11, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 11, 4, 7, 11, 2, 4, 2, 0, 4, -1, -1, -1, -1, -1, -1, -1, 9, 0, 1, 8, 4, 7, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, 4, 7, 11, 9, 4, 11, 9, 11, 2, 9, 2, 1, -1, -1, -1, -1, 3, 10, 1, 3, 11, 10, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1, 1, 11, 10, 1, 4, 11, 1, 0, 4, 7, 11, 4, -1, -1, -1, -1, 4, 7, 8, 9, 0, 11, 9, 11, 10, 11, 0, 3, -1, -1, -1, -1, 4, 7, 11, 4, 11, 9, 9, 11, 10, -1, -1, -1, -1, -1, -1, -1, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 5, 4, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 5, 4, 1, 5, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8, 5, 4, 8, 3, 5, 3, 1, 5, -1, -1, -1, -1, -1, -1, -1, 1, 2, 10, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3, 0, 8, 1, 2, 10, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1, 5, 2, 10, 5, 4, 2, 4, 0, 2, -1, -1, -1, -1, -1, -1, -1, 2, 10, 5, 3, 2, 5, 3, 5, 4, 3, 4, 8, -1, -1, -1, -1, 9, 5, 4, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 11, 2, 0, 8, 11, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1, 0, 5, 4, 0, 1, 5, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, 2, 1, 5, 2, 5, 8, 2, 8, 11, 4, 8, 5, -1, -1, -1, -1, 10, 3, 11, 10, 1, 3, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1, 4, 9, 5, 0, 8, 1, 8, 10, 1, 8, 11, 10, -1, -1, -1, -1, 5, 4, 0, 5, 0, 11, 5, 11, 10, 11, 0, 3, -1, -1, -1, -1, 5, 4, 8, 5, 8, 10, 10, 8, 11, -1, -1, -1, -1, -1, -1, -1, 9, 7, 8, 5, 7, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 3, 0, 9, 5, 3, 5, 7, 3, -1, -1, -1, -1, -1, -1, -1, 0, 7, 8, 0, 1, 7, 1, 5, 7, -1, -1, -1, -1, -1, -1, -1, 1, 5, 3, 3, 5, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 7, 8, 9, 5, 7, 10, 1, 2, -1, -1, -1, -1, -1, -1, -1, 10, 1, 2, 9, 5, 0, 5, 3, 0, 5, 7, 3, -1, -1, -1, -1, 8, 0, 2, 8, 2, 5, 8, 5, 7, 10, 5, 2, -1, -1, -1, -1, 2, 10, 5, 2, 5, 3, 3, 5, 7, -1, -1, -1, -1, -1, -1, -1, 7, 9, 5, 7, 8, 9, 3, 11, 2, -1, -1, -1, -1, -1, -1, -1, 9, 5, 7, 9, 7, 2, 9, 2, 0, 2, 7, 11, -1, -1, -1, -1, 2, 3, 11, 0, 1, 8, 1, 7, 8, 1, 5, 7, -1, -1, -1, -1, 11, 2, 1, 11, 1, 7, 7, 1, 5, -1, -1, -1, -1, -1, -1, -1, 9, 5, 8, 8, 5, 7, 10, 1, 3, 10, 3, 11, -1, -1, -1, -1, 5, 7, 0, 5, 0, 9, 7, 11, 0, 1, 0, 10, 11, 10, 0, -1, 11, 10, 0, 11, 0, 3, 10, 5, 0, 8, 0, 7, 5, 7, 0, -1, 11, 10, 5, 7, 11, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 8, 3, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 0, 1, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 8, 3, 1, 9, 8, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, 1, 6, 5, 2, 6, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 6, 5, 1, 2, 6, 3, 0, 8, -1, -1, -1, -1, -1, -1, -1, 9, 6, 5, 9, 0, 6, 0, 2, 6, -1, -1, -1, -1, -1, -1, -1, 5, 9, 8, 5, 8, 2, 5, 2, 6, 3, 2, 8, -1, -1, -1, -1, 2, 3, 11, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 11, 0, 8, 11, 2, 0, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, 0, 1, 9, 2, 3, 11, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, 5, 10, 6, 1, 9, 2, 9, 11, 2, 9, 8, 11, -1, -1, -1, -1, 6, 3, 11, 6, 5, 3, 5, 1, 3, -1, -1, -1, -1, -1, -1, -1, 0, 8, 11, 0, 11, 5, 0, 5, 1, 5, 11, 6, -1, -1, -1, -1, 3, 11, 6, 0, 3, 6, 0, 6, 5, 0, 5, 9, -1, -1, -1, -1, 6, 5, 9, 6, 9, 11, 11, 9, 8, -1, -1, -1, -1, -1, -1, -1, 5, 10, 6, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4, 3, 0, 4, 7, 3, 6, 5, 10, -1, -1, -1, -1, -1, -1, -1, 1, 9, 0, 5, 10, 6, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, 10, 6, 5, 1, 9, 7, 1, 7, 3, 7, 9, 4, -1, -1, -1, -1, 6, 1, 2, 6, 5, 1, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1, 1, 2, 5, 5, 2, 6, 3, 0, 4, 3, 4, 7, -1, -1, -1, -1, 8, 4, 7, 9, 0, 5, 0, 6, 5, 0, 2, 6, -1, -1, -1, -1, 7, 3, 9, 7, 9, 4, 3, 2, 9, 5, 9, 6, 2, 6, 9, -1, 3, 11, 2, 7, 8, 4, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, 5, 10, 6, 4, 7, 2, 4, 2, 0, 2, 7, 11, -1, -1, -1, -1, 0, 1, 9, 4, 7, 8, 2, 3, 11, 5, 10, 6, -1, -1, -1, -1, 9, 2, 1, 9, 11, 2, 9, 4, 11, 7, 11, 4, 5, 10, 6, -1, 8, 4, 7, 3, 11, 5, 3, 5, 1, 5, 11, 6, -1, -1, -1, -1, 5, 1, 11, 5, 11, 6, 1, 0, 11, 7, 11, 4, 0, 4, 11, -1, 0, 5, 9, 0, 6, 5, 0, 3, 6, 11, 6, 3, 8, 4, 7, -1, 6, 5, 9, 6, 9, 11, 4, 7, 9, 7, 11, 9, -1, -1, -1, -1, 10, 4, 9, 6, 4, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4, 10, 6, 4, 9, 10, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1, 10, 0, 1, 10, 6, 0, 6, 4, 0, -1, -1, -1, -1, -1, -1, -1, 8, 3, 1, 8, 1, 6, 8, 6, 4, 6, 1, 10, -1, -1, -1, -1, 1, 4, 9, 1, 2, 4, 2, 6, 4, -1, -1, -1, -1, -1, -1, -1, 3, 0, 8, 1, 2, 9, 2, 4, 9, 2, 6, 4, -1, -1, -1, -1, 0, 2, 4, 4, 2, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8, 3, 2, 8, 2, 4, 4, 2, 6, -1, -1, -1, -1, -1, -1, -1, 10, 4, 9, 10, 6, 4, 11, 2, 3, -1, -1, -1, -1, -1, -1, -1, 0, 8, 2, 2, 8, 11, 4, 9, 10, 4, 10, 6, -1, -1, -1, -1, 3, 11, 2, 0, 1, 6, 0, 6, 4, 6, 1, 10, -1, -1, -1, -1, 6, 4, 1, 6, 1, 10, 4, 8, 1, 2, 1, 11, 8, 11, 1, -1, 9, 6, 4, 9, 3, 6, 9, 1, 3, 11, 6, 3, -1, -1, -1, -1, 8, 11, 1, 8, 1, 0, 11, 6, 1, 9, 1, 4, 6, 4, 1, -1, 3, 11, 6, 3, 6, 0, 0, 6, 4, -1, -1, -1, -1, -1, -1, -1, 6, 4, 8, 11, 6, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7, 10, 6, 7, 8, 10, 8, 9, 10, -1, -1, -1, -1, -1, -1, -1, 0, 7, 3, 0, 10, 7, 0, 9, 10, 6, 7, 10, -1, -1, -1, -1, 10, 6, 7, 1, 10, 7, 1, 7, 8, 1, 8, 0, -1, -1, -1, -1, 10, 6, 7, 10, 7, 1, 1, 7, 3, -1, -1, -1, -1, -1, -1, -1, 1, 2, 6, 1, 6, 8, 1, 8, 9, 8, 6, 7, -1, -1, -1, -1, 2, 6, 9, 2, 9, 1, 6, 7, 9, 0, 9, 3, 7, 3, 9, -1, 7, 8, 0, 7, 0, 6, 6, 0, 2, -1, -1, -1, -1, -1, -1, -1, 7, 3, 2, 6, 7, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2, 3, 11, 10, 6, 8, 10, 8, 9, 8, 6, 7, -1, -1, -1, -1, 2, 0, 7, 2, 7, 11, 0, 9, 7, 6, 7, 10, 9, 10, 7, -1, 1, 8, 0, 1, 7, 8, 1, 10, 7, 6, 7, 10, 2, 3, 11, -1, 11, 2, 1, 11, 1, 7, 10, 6, 1, 6, 7, 1, -1, -1, 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  _exports.triTable = triTable;
});