lr-core/line-space/LineSpace.js

Line Rider core library

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _orderedObjectArray = require('../ordered-object-array');

var _orderedObjectArray2 = _interopRequireDefault(_orderedObjectArray);

var _g = require('../g2');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class LineSpace {
  constructor(getLineCoordinates) {
    this.getLineCoordinates = getLineCoordinates;
    this.lines = new _orderedObjectArray2.default('id');
  }

  addLine(line) {
    this.lines.add(line);
  }
  removeLine(line) {
    this.lines.remove(line);
  }

  selectLinesInBox(x0, y0, x1, y1) {
    return this.lines.filter(line => (0, _g.lineInBox)(...this.getLineCoordinates(line), x0, y0, x1, y1));
  }

  selectLinesInRadius({ x, y }, r) {
    return this.lines.filter(line => (0, _g.pointLineDistanceSquared)(x, y, ...this.getLineCoordinates(line)) < r * r);
  }

  selectClosestLineInRadius({ x, y }, r) {
    let closestLine = null;
    let closestLineDistanceSquared = r * r;
    for (let line of this.lines) {
      let lineDistanceSquared = (0, _g.pointLineDistanceSquared)(x, y, ...this.getLineCoordinates(line));
      if (lineDistanceSquared < closestLineDistanceSquared) {
        closestLine = line;
        closestLineDistanceSquared = lineDistanceSquared;
      }
    }
    return closestLine;
  }

  getBoundingBox() {
    if (this.lines.length === 0) {
      return [0, 0, 0, 0];
    }
    // left top right bottom
    let bb = [Number.MAX_VALUE, Number.MAX_VALUE, Number.MIN_VALUE, Number.MIN_VALUE];
    const setNextBoundingBox = (x, y) => {
      if (x < bb[0]) {
        bb[0] = x;
      }
      if (y < bb[1]) {
        bb[1] = y;
      }
      if (x > bb[2]) {
        bb[2] = x;
      }
      if (y > bb[3]) {
        bb[3] = y;
      }
    };
    for (let line of this.lines) {
      let [x0, y0, x1, y1] = this.getLineCoordinates(line);
      setNextBoundingBox(x0, y0);
      setNextBoundingBox(x1, y1);
    }
    return bb;
  }
}
exports.default = LineSpace;