scancode-miro/node_modules/@turf/kinks/dist/cjs/index.cjs

"use strict";Object.defineProperty(exports, "__esModule", {value: true});// index.ts
var _helpers = require('@turf/helpers');
function kinks(featureIn) {
  let coordinates;
  let feature;
  const results = {
    type: "FeatureCollection",
    features: []
  };
  if (featureIn.type === "Feature") {
    feature = featureIn.geometry;
  } else {
    feature = featureIn;
  }
  if (feature.type === "LineString") {
    coordinates = [feature.coordinates];
  } else if (feature.type === "MultiLineString") {
    coordinates = feature.coordinates;
  } else if (feature.type === "MultiPolygon") {
    coordinates = [].concat(...feature.coordinates);
  } else if (feature.type === "Polygon") {
    coordinates = feature.coordinates;
  } else {
    throw new Error(
      "Input must be a LineString, MultiLineString, Polygon, or MultiPolygon Feature or Geometry"
    );
  }
  coordinates.forEach((line1) => {
    coordinates.forEach((line2) => {
      for (let i = 0; i < line1.length - 1; i++) {
        for (let k = i; k < line2.length - 1; k++) {
          if (line1 === line2) {
            if (Math.abs(i - k) === 1) {
              continue;
            }
            if (
              // segments are first and last segment of lineString
              i === 0 && k === line1.length - 2 && // lineString is closed
              line1[i][0] === line1[line1.length - 1][0] && line1[i][1] === line1[line1.length - 1][1]
            ) {
              continue;
            }
          }
          const intersection = lineIntersects(
            line1[i][0],
            line1[i][1],
            line1[i + 1][0],
            line1[i + 1][1],
            line2[k][0],
            line2[k][1],
            line2[k + 1][0],
            line2[k + 1][1]
          );
          if (intersection) {
            results.features.push(_helpers.point.call(void 0, [intersection[0], intersection[1]]));
          }
        }
      }
    });
  });
  return results;
}
function lineIntersects(line1StartX, line1StartY, line1EndX, line1EndY, line2StartX, line2StartY, line2EndX, line2EndY) {
  let denominator;
  let a;
  let b;
  let numerator1;
  let numerator2;
  const result = {
    x: null,
    y: null,
    onLine1: false,
    onLine2: false
  };
  denominator = (line2EndY - line2StartY) * (line1EndX - line1StartX) - (line2EndX - line2StartX) * (line1EndY - line1StartY);
  if (denominator === 0) {
    if (result.x !== null && result.y !== null) {
      return result;
    } else {
      return false;
    }
  }
  a = line1StartY - line2StartY;
  b = line1StartX - line2StartX;
  numerator1 = (line2EndX - line2StartX) * a - (line2EndY - line2StartY) * b;
  numerator2 = (line1EndX - line1StartX) * a - (line1EndY - line1StartY) * b;
  a = numerator1 / denominator;
  b = numerator2 / denominator;
  result.x = line1StartX + a * (line1EndX - line1StartX);
  result.y = line1StartY + a * (line1EndY - line1StartY);
  if (a >= 0 && a <= 1) {
    result.onLine1 = true;
  }
  if (b >= 0 && b <= 1) {
    result.onLine2 = true;
  }
  if (result.onLine1 && result.onLine2) {
    return [result.x, result.y];
  } else {
    return false;
  }
}
var turf_kinks_default = kinks;



exports.default = turf_kinks_default; exports.kinks = kinks;
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