node-red-contrib-tak-registration
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A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK
53 lines (52 loc) • 2.53 kB
JavaScript
import CoordinateList from '../../geom/CoordinateList'
import GeometryFactory from '../../geom/GeometryFactory'
import Coordinate from '../../geom/Coordinate'
import ArrayList from '../../../../../java/util/ArrayList'
import GeometricShapeBuilder from '../GeometricShapeBuilder'
export default class SierpinskiCarpetBuilder extends GeometricShapeBuilder {
constructor() {
super()
SierpinskiCarpetBuilder.constructor_.apply(this, arguments)
}
static constructor_() {
this._coordList = new CoordinateList()
const geomFactory = arguments[0]
GeometricShapeBuilder.constructor_.call(this, geomFactory)
}
static recursionLevelForSize(numPts) {
const pow4 = Math.trunc(numPts / 3)
const exp = Math.log(pow4) / Math.log(4)
return Math.trunc(exp)
}
addHoles(n, originX, originY, width, holeList) {
if (n < 0) return null
const n2 = n - 1
const widthThird = width / 3.0
this.addHoles(n2, originX, originY, widthThird, holeList)
this.addHoles(n2, originX + widthThird, originY, widthThird, holeList)
this.addHoles(n2, originX + 2 * widthThird, originY, widthThird, holeList)
this.addHoles(n2, originX, originY + widthThird, widthThird, holeList)
this.addHoles(n2, originX + 2 * widthThird, originY + widthThird, widthThird, holeList)
this.addHoles(n2, originX, originY + 2 * widthThird, widthThird, holeList)
this.addHoles(n2, originX + widthThird, originY + 2 * widthThird, widthThird, holeList)
this.addHoles(n2, originX + 2 * widthThird, originY + 2 * widthThird, widthThird, holeList)
holeList.add(this.createSquareHole(originX + widthThird, originY + widthThird, widthThird))
}
getHoles(n, originX, originY, width) {
const holeList = new ArrayList()
this.addHoles(n, originX, originY, width, holeList)
return GeometryFactory.toLinearRingArray(holeList)
}
createSquareHole(x, y, width) {
const pts = [new Coordinate(x, y), new Coordinate(x + width, y), new Coordinate(x + width, y + width), new Coordinate(x, y + width), new Coordinate(x, y)]
return this._geomFactory.createLinearRing(pts)
}
getGeometry() {
const level = SierpinskiCarpetBuilder.recursionLevelForSize(this._numPts)
const baseLine = this.getSquareBaseLine()
const origin = baseLine.getCoordinate(0)
const holes = this.getHoles(level, origin.x, origin.y, this.getDiameter())
const shell = this._geomFactory.toGeometry(this.getSquareExtent()).getExteriorRing()
return this._geomFactory.createPolygon(shell, holes)
}
}