@mkerkstra/jsts-cjs
Version:
A CommonJS fork of JSTS: A JavaScript library of spatial predicates and functions for processing geometry
47 lines (45 loc) • 2.41 kB
JavaScript
import LineString from '../../geom/LineString.js'
import Geometry from '../../geom/Geometry.js'
import Coordinate from '../../geom/Coordinate.js'
import Polygon from '../../geom/Polygon.js'
import LineSegment from '../../geom/LineSegment.js'
import PointPairDistance from './PointPairDistance.js'
import GeometryCollection from '../../geom/GeometryCollection.js'
export default class DistanceToPoint {
static computeDistance() {
if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
const line = arguments[0], pt = arguments[1], ptDist = arguments[2]
const tempSegment = new LineSegment()
const coords = line.getCoordinates()
for (let i = 0; i < coords.length - 1; i++) {
tempSegment.setCoordinates(coords[i], coords[i + 1])
const closestPt = tempSegment.closestPoint(pt)
ptDist.setMinimum(closestPt, pt)
}
} else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
const poly = arguments[0], pt = arguments[1], ptDist = arguments[2]
DistanceToPoint.computeDistance(poly.getExteriorRing(), pt, ptDist)
for (let i = 0; i < poly.getNumInteriorRing(); i++)
DistanceToPoint.computeDistance(poly.getInteriorRingN(i), pt, ptDist)
} else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
const geom = arguments[0], pt = arguments[1], ptDist = arguments[2]
if (geom instanceof LineString) {
DistanceToPoint.computeDistance(geom, pt, ptDist)
} else if (geom instanceof Polygon) {
DistanceToPoint.computeDistance(geom, pt, ptDist)
} else if (geom instanceof GeometryCollection) {
const gc = geom
for (let i = 0; i < gc.getNumGeometries(); i++) {
const g = gc.getGeometryN(i)
DistanceToPoint.computeDistance(g, pt, ptDist)
}
} else {
ptDist.setMinimum(geom.getCoordinate(), pt)
}
} else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
const segment = arguments[0], pt = arguments[1], ptDist = arguments[2]
const closestPt = segment.closestPoint(pt)
ptDist.setMinimum(closestPt, pt)
}
}
}