@mkerkstra/jsts-cjs
Version:
A CommonJS fork of JSTS: A JavaScript library of spatial predicates and functions for processing geometry
67 lines (65 loc) • 2.5 kB
JavaScript
import Location from '../../geom/Location.js'
import Polygon from '../../geom/Polygon.js'
import PointLocation from '../PointLocation.js'
import PointOnGeometryLocator from './PointOnGeometryLocator.js'
import GeometryCollectionIterator from '../../geom/GeometryCollectionIterator.js'
import GeometryCollection from '../../geom/GeometryCollection.js'
export default class SimplePointInAreaLocator {
constructor() {
SimplePointInAreaLocator.constructor_.apply(this, arguments)
}
static constructor_() {
this._geom = null
const geom = arguments[0]
this._geom = geom
}
static locatePointInPolygon(p, poly) {
if (poly.isEmpty()) return Location.EXTERIOR
const shell = poly.getExteriorRing()
const shellLoc = SimplePointInAreaLocator.locatePointInRing(p, shell)
if (shellLoc !== Location.INTERIOR) return shellLoc
for (let i = 0; i < poly.getNumInteriorRing(); i++) {
const hole = poly.getInteriorRingN(i)
const holeLoc = SimplePointInAreaLocator.locatePointInRing(p, hole)
if (holeLoc === Location.BOUNDARY) return Location.BOUNDARY
if (holeLoc === Location.INTERIOR) return Location.EXTERIOR
}
return Location.INTERIOR
}
static locatePointInRing(p, ring) {
if (!ring.getEnvelopeInternal().intersects(p)) return Location.EXTERIOR
return PointLocation.locateInRing(p, ring.getCoordinates())
}
static isContained(p, geom) {
return Location.EXTERIOR !== SimplePointInAreaLocator.locate(p, geom)
}
static locate(p, geom) {
if (geom.isEmpty()) return Location.EXTERIOR
if (!geom.getEnvelopeInternal().intersects(p)) return Location.EXTERIOR
return SimplePointInAreaLocator.locateInGeometry(p, geom)
}
static containsPointInPolygon(p, poly) {
return Location.EXTERIOR !== SimplePointInAreaLocator.locatePointInPolygon(p, poly)
}
static locateInGeometry(p, geom) {
if (geom instanceof Polygon)
return SimplePointInAreaLocator.locatePointInPolygon(p, geom)
if (geom instanceof GeometryCollection) {
const geomi = new GeometryCollectionIterator(geom)
while (geomi.hasNext()) {
const g2 = geomi.next()
if (g2 !== geom) {
const loc = SimplePointInAreaLocator.locateInGeometry(p, g2)
if (loc !== Location.EXTERIOR) return loc
}
}
}
return Location.EXTERIOR
}
locate(p) {
return SimplePointInAreaLocator.locate(p, this._geom)
}
get interfaces_() {
return [PointOnGeometryLocator]
}
}