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

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

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


/**
 *
 * @param {Vec2} start
 * @param {Vec2}end
 * @constructor
 */
function SegmentLine(start, end) {
  this.start = start;
  this.end = end;
}

SegmentLine.prototype.length = function () {
  return this.start.dist(this.end);
};
/**
 *
 * @param t
 * @returns {Vec2}
 */


SegmentLine.prototype.pointAt = function (t) {
  return this.start.add(this.end.sub(this.start).mult(t));
};
/**
 *
 * @param {Vec2} point
 * @returns {number}
 */


SegmentLine.prototype.nearestParamToPoint = function (point) {
  var v = this.end.sub(this.start);
  var w = point.sub(this.start);
  var c1 = w.dot(v);

  if (c1 <= 0) {
    return 0;
  }

  var c2 = v.dot(v);

  if (c2 <= c1) {
    return 1;
  }

  return c1 / c2;
};
/**
 *
 * @param {Vec2} point
 * @returns {Vec2}
 */


SegmentLine.prototype.nearestPointToPoint = function (point) {
  return this.pointAt(this.nearestParamToPoint(point));
};
/**
 *
 * @param {SegmentLine} sgm
 * @returns {Vec2}
 */


SegmentLine.prototype.intersect = function (sgm) {
  var x1 = this.start.x;
  var y1 = this.start.y;
  var x2 = this.end.x;
  var y2 = this.end.y;
  var x3 = sgm.start.x;
  var y3 = sgm.start.y;
  var x4 = sgm.end.x;
  var y4 = sgm.end.y;
  var d = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);

  if (d === 0) {
    return null;
  }

  var xi = ((x3 - x4) * (x1 * y2 - y1 * x2) - (x1 - x2) * (x3 * y4 - y3 * x4)) / d;
  var yi = ((y3 - y4) * (x1 * y2 - y1 * x2) - (y1 - y2) * (x3 * y4 - y3 * x4)) / d;
  return new _Vec.default(xi, yi);
};
/**
 *
 * @param {SegmentLine} sgm
 * @returns {boolean}
 */


SegmentLine.prototype.isIntersectWithSegment = function (sgm) {
  return this.intersect(sgm) !== null;
};
/**
 * @param {Vec2} point
 */


SegmentLine.prototype.orthogonalProjectionPoint = function (point) {
  var v = this.end.sub(this.start);
  var w = point.sub(this.start);
  var c1 = w.dot(v);
  var c2 = v.dot(v);
  if (c2 === 0) return this.start;
  return this.start.add(v.mult(c1 / c2));
};

SegmentLine.prototype.midpoint = function () {
  return this.pointAt(0.5);
};

SegmentLine.prototype.clone = function () {
  return new SegmentLine(this.start.clone(), this.end.clone());
};

var _default = SegmentLine;
exports.default = _default;