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/*** module: node_modules/absol/src/Math/Polygon.js ***/
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _Vec = _interopRequireDefault(require("./Vec2"));


/***
 *
 * @param {Vec2[]} vertices
 * @constructor
 */
function Polygon(vertices) {
  this.vertices = vertices;
}
/***
 *
 * @param {Vec2} P
 * @returns {-1|0|1}
 */


Polygon.prototype.pointLocalIn = function (P) {
  var A = this.vertices[this.vertices.length - 1];
  var B;
  var AB, PA, PB;
  var t, x;
  var count = 0;

  for (var i = 0; i < this.vertices.length; ++i) {
    B = this.vertices[i];
    PA = A.sub(P);
    PB = B.sub(P);

    if (PA.cross(PB) === 0 && PA.dot(PB) <= 0) {
      return 0;
    }

    AB = B.sub(A);

    if (A.y !== B.y) {
      t = -PA.y / AB.y;
      x = A.x + AB.x * t;

      if (t >= 0 && t < 1 && x > P.x) {
        count++;
      }
    }

    A = B;
  }

  return count % 2 === 1 ? 1 : -1;
};

Polygon.prototype.getPathString = function () {
  var vts = this.vertices;
  var res = 'M' + vts[0].x + ' ' + vts[0].y;

  for (var i = 1; i < vts.length; ++i) {
    res += 'L' + vts[i].x + ' ' + vts[i].y;
  }

  res += 'z';
  return res;
};

Polygon.prototype.copy = function () {
  return new Polygon(this.vertices.map(v => {
    return v.copy();
  }));
};

Polygon.make = function (vertices) {
  return new Polygon(vertices);
};

var _default = Polygon;
exports.default = _default;