ol/src/geom/flat/inflate.js

OpenLayers mapping library

/**
 * @module ol/geom/flat/inflate
 */


/**
 * @param {Array<number>} flatCoordinates Flat coordinates.
 * @param {number} offset Offset.
 * @param {number} end End.
 * @param {number} stride Stride.
 * @param {Array<import("../../coordinate.js").Coordinate>=} opt_coordinates Coordinates.
 * @return {Array<import("../../coordinate.js").Coordinate>} Coordinates.
 */
export function inflateCoordinates(flatCoordinates, offset, end, stride, opt_coordinates) {
  const coordinates = opt_coordinates !== undefined ? opt_coordinates : [];
  let i = 0;
  for (let j = offset; j < end; j += stride) {
    coordinates[i++] = flatCoordinates.slice(j, j + stride);
  }
  coordinates.length = i;
  return coordinates;
}


/**
 * @param {Array<number>} flatCoordinates Flat coordinates.
 * @param {number} offset Offset.
 * @param {Array<number>} ends Ends.
 * @param {number} stride Stride.
 * @param {Array<Array<import("../../coordinate.js").Coordinate>>=} opt_coordinatess Coordinatess.
 * @return {Array<Array<import("../../coordinate.js").Coordinate>>} Coordinatess.
 */
export function inflateCoordinatesArray(flatCoordinates, offset, ends, stride, opt_coordinatess) {
  const coordinatess = opt_coordinatess !== undefined ? opt_coordinatess : [];
  let i = 0;
  for (let j = 0, jj = ends.length; j < jj; ++j) {
    const end = ends[j];
    coordinatess[i++] = inflateCoordinates(
      flatCoordinates, offset, end, stride, coordinatess[i]);
    offset = end;
  }
  coordinatess.length = i;
  return coordinatess;
}


/**
 * @param {Array<number>} flatCoordinates Flat coordinates.
 * @param {number} offset Offset.
 * @param {Array<Array<number>>} endss Endss.
 * @param {number} stride Stride.
 * @param {Array<Array<Array<import("../../coordinate.js").Coordinate>>>=} opt_coordinatesss
 *     Coordinatesss.
 * @return {Array<Array<Array<import("../../coordinate.js").Coordinate>>>} Coordinatesss.
 */
export function inflateMultiCoordinatesArray(flatCoordinates, offset, endss, stride, opt_coordinatesss) {
  const coordinatesss = opt_coordinatesss !== undefined ? opt_coordinatesss : [];
  let i = 0;
  for (let j = 0, jj = endss.length; j < jj; ++j) {
    const ends = endss[j];
    coordinatesss[i++] = inflateCoordinatesArray(
      flatCoordinates, offset, ends, stride, coordinatesss[i]);
    offset = ends[ends.length - 1];
  }
  coordinatesss.length = i;
  return coordinatesss;
}