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
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var helpers_1 = require("@turf/helpers");
var invariant_1 = require("@turf/invariant");
var lineclip_1 = require("./lib/lineclip");
/**
* Takes a {@link Feature} and a bbox and clips the feature to the bbox using
* [lineclip](https://github.com/mapbox/lineclip).
* May result in degenerate edges when clipping Polygons.
*
* @name bboxClip
* @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
* @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
* @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
* @example
* var bbox = [0, 0, 10, 10];
* var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
*
* var clipped = turf.bboxClip(poly, bbox);
*
* //addToMap
* var addToMap = [bbox, poly, clipped]
*/
function bboxClip(feature, bbox) {
var geom = invariant_1.getGeom(feature);
var type = geom.type;
var properties = feature.type === "Feature" ? feature.properties : {};
var coords = geom.coordinates;
switch (type) {
case "LineString":
case "MultiLineString": {
var lines_1 = [];
if (type === "LineString") {
coords = [coords];
}
coords.forEach(function (line) {
lineclip_1.lineclip(line, bbox, lines_1);
});
if (lines_1.length === 1) {
return helpers_1.lineString(lines_1[0], properties);
}
return helpers_1.multiLineString(lines_1, properties);
}
case "Polygon":
return helpers_1.polygon(clipPolygon(coords, bbox), properties);
case "MultiPolygon":
return helpers_1.multiPolygon(coords.map(function (poly) {
return clipPolygon(poly, bbox);
}), properties);
default:
throw new Error("geometry " + type + " not supported");
}
}
exports.default = bboxClip;
function clipPolygon(rings, bbox) {
var outRings = [];
for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
var ring = rings_1[_i];
var clipped = lineclip_1.polygonclip(ring, bbox);
if (clipped.length > 0) {
if (clipped[0][0] !== clipped[clipped.length - 1][0] ||
clipped[0][1] !== clipped[clipped.length - 1][1]) {
clipped.push(clipped[0]);
}
if (clipped.length >= 4) {
outRings.push(clipped);
}
}
}
return outRings;
}