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
29 lines • 1.04 kB
JavaScript
// index.js
import { getCoords, getType } from "@turf/invariant";
import { lineString as linestring } from "@turf/helpers";
import { nearestPointOnLine } from "@turf/nearest-point-on-line";
function lineSlice(startPt, stopPt, line) {
var coords = getCoords(line);
if (getType(line) !== "LineString")
throw new Error("line must be a LineString");
var startVertex = nearestPointOnLine(line, startPt);
var stopVertex = nearestPointOnLine(line, stopPt);
var ends;
if (startVertex.properties.index <= stopVertex.properties.index) {
ends = [startVertex, stopVertex];
} else {
ends = [stopVertex, startVertex];
}
var clipCoords = [ends[0].geometry.coordinates];
for (var i = ends[0].properties.index + 1; i < ends[1].properties.index + 1; i++) {
clipCoords.push(coords[i]);
}
clipCoords.push(ends[1].geometry.coordinates);
return linestring(clipCoords, line.properties);
}
var turf_line_slice_default = lineSlice;
export {
turf_line_slice_default as default,
lineSlice
};
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