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106 lines
2.5 KiB
106 lines
2.5 KiB
3 years ago
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/**
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* @module ol/geom/flat/deflate
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*/
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/**
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* @param {Array<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {import("../../coordinate.js").Coordinate} coordinate Coordinate.
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* @param {number} stride Stride.
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* @return {number} offset Offset.
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*/
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export function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {
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for (let i = 0, ii = coordinate.length; i < ii; ++i) {
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flatCoordinates[offset++] = coordinate[i];
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}
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return offset;
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}
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/**
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* @param {Array<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {Array<import("../../coordinate.js").Coordinate>} coordinates Coordinates.
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* @param {number} stride Stride.
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* @return {number} offset Offset.
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*/
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export function deflateCoordinates(
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flatCoordinates,
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offset,
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coordinates,
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stride
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) {
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for (let i = 0, ii = coordinates.length; i < ii; ++i) {
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const coordinate = coordinates[i];
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for (let j = 0; j < stride; ++j) {
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flatCoordinates[offset++] = coordinate[j];
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}
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}
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return offset;
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}
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/**
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* @param {Array<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {Array<Array<import("../../coordinate.js").Coordinate>>} coordinatess Coordinatess.
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* @param {number} stride Stride.
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* @param {Array<number>} [ends] Ends.
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* @return {Array<number>} Ends.
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*/
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export function deflateCoordinatesArray(
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flatCoordinates,
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offset,
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coordinatess,
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stride,
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ends
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) {
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ends = ends ? ends : [];
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let i = 0;
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for (let j = 0, jj = coordinatess.length; j < jj; ++j) {
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const end = deflateCoordinates(
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flatCoordinates,
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offset,
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coordinatess[j],
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stride
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);
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ends[i++] = end;
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offset = end;
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}
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ends.length = i;
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return ends;
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}
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/**
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* @param {Array<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {Array<Array<Array<import("../../coordinate.js").Coordinate>>>} coordinatesss Coordinatesss.
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* @param {number} stride Stride.
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* @param {Array<Array<number>>} [endss] Endss.
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* @return {Array<Array<number>>} Endss.
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*/
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export function deflateMultiCoordinatesArray(
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flatCoordinates,
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offset,
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coordinatesss,
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stride,
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endss
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) {
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endss = endss ? endss : [];
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let i = 0;
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for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {
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const ends = deflateCoordinatesArray(
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flatCoordinates,
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offset,
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coordinatesss[j],
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stride,
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endss[i]
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);
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if (ends.length === 0) {
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ends[0] = offset;
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}
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endss[i++] = ends;
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offset = ends[ends.length - 1];
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}
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endss.length = i;
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return endss;
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}
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