jsts/org/locationtech/jts/linearref/LocationIndexedLine.js

A JavaScript library of spatial predicates and functions for processing geometry

import LineString from '../geom/LineString.js'
import IllegalArgumentException from '../../../../java/lang/IllegalArgumentException.js'
import LinearLocation from './LinearLocation.js'
import LocationIndexOfPoint from './LocationIndexOfPoint.js'
import LocationIndexOfLine from './LocationIndexOfLine.js'
import ExtractLineByLocation from './ExtractLineByLocation.js'
import MultiLineString from '../geom/MultiLineString.js'
export default class LocationIndexedLine {
  constructor() {
    LocationIndexedLine.constructor_.apply(this, arguments)
  }
  static constructor_() {
    this._linearGeom = null
    const linearGeom = arguments[0]
    this._linearGeom = linearGeom
    this.checkGeometryType()
  }
  clampIndex(index) {
    const loc = index.copy()
    loc.clamp(this._linearGeom)
    return loc
  }
  project(pt) {
    return LocationIndexOfPoint.indexOf(this._linearGeom, pt)
  }
  checkGeometryType() {
    if (!(this._linearGeom instanceof LineString || this._linearGeom instanceof MultiLineString)) throw new IllegalArgumentException('Input geometry must be linear')
  }
  extractPoint() {
    if (arguments.length === 1) {
      const index = arguments[0]
      return index.getCoordinate(this._linearGeom)
    } else if (arguments.length === 2) {
      const index = arguments[0], offsetDistance = arguments[1]
      const indexLow = index.toLowest(this._linearGeom)
      return indexLow.getSegment(this._linearGeom).pointAlongOffset(indexLow.getSegmentFraction(), offsetDistance)
    }
  }
  getStartIndex() {
    return new LinearLocation()
  }
  indexOfAfter(pt, minIndex) {
    return LocationIndexOfPoint.indexOfAfter(this._linearGeom, pt, minIndex)
  }
  extractLine(startIndex, endIndex) {
    return ExtractLineByLocation.extract(this._linearGeom, startIndex, endIndex)
  }
  isValidIndex(index) {
    return index.isValid(this._linearGeom)
  }
  getEndIndex() {
    return LinearLocation.getEndLocation(this._linearGeom)
  }
  indexOf(pt) {
    return LocationIndexOfPoint.indexOf(this._linearGeom, pt)
  }
  indicesOf(subLine) {
    return LocationIndexOfLine.indicesOf(this._linearGeom, subLine)
  }
}