node-red-contrib-tak-registration
Version:
A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK
42 lines (40 loc) • 1.17 kB
JavaScript
import Integer from '../../../../../java/lang/Integer'
import ArrayList from '../../../../../java/util/ArrayList'
import Quadrant from '../Quadrant'
export default class MonotoneChainIndexer {
getChainStartIndices (pts) {
let start = 0
const startIndexList = new ArrayList()
startIndexList.add(new Integer(start))
do {
const last = this.findChainEnd(pts, start)
startIndexList.add(new Integer(last))
start = last
} while (start < pts.length - 1)
const startIndex = MonotoneChainIndexer.toIntArray(startIndexList)
return startIndex
}
findChainEnd (pts, start) {
const chainQuad = Quadrant.quadrant(pts[start], pts[start + 1])
let last = start + 1
while (last < pts.length) {
const quad = Quadrant.quadrant(pts[last - 1], pts[last])
if (quad !== chainQuad) break
last++
}
return last - 1
}
interfaces_ () {
return []
}
getClass () {
return MonotoneChainIndexer
}
static toIntArray (list) {
const array = new Array(list.size()).fill(null)
for (let i = 0; i < array.length; i++) {
array[i] = list.get(i).intValue()
}
return array
}
}