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92 lines
2.4 KiB
JavaScript
92 lines
2.4 KiB
JavaScript
/**
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* @module ol/tilecoord
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*/
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/**
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* An array of three numbers representing the location of a tile in a tile
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* grid. The order is `z` (zoom level), `x` (column), and `y` (row).
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* @typedef {Array<number>} TileCoord
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* @api
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*/
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/**
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* @param {number} z Z.
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* @param {number} x X.
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* @param {number} y Y.
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* @param {TileCoord} [opt_tileCoord] Tile coordinate.
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* @return {TileCoord} Tile coordinate.
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*/
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export function createOrUpdate(z, x, y, opt_tileCoord) {
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if (opt_tileCoord !== undefined) {
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opt_tileCoord[0] = z;
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opt_tileCoord[1] = x;
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opt_tileCoord[2] = y;
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return opt_tileCoord;
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}
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else {
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return [z, x, y];
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}
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}
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/**
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* @param {number} z Z.
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* @param {number} x X.
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* @param {number} y Y.
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* @return {string} Key.
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*/
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export function getKeyZXY(z, x, y) {
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return z + '/' + x + '/' + y;
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}
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/**
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* Get the key for a tile coord.
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* @param {TileCoord} tileCoord The tile coord.
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* @return {string} Key.
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*/
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export function getKey(tileCoord) {
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return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);
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}
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/**
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* Get the tile cache key for a tile key obtained through `tile.getKey()`.
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* @param {string} tileKey The tile key.
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* @return {string} The cache key.
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*/
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export function getCacheKeyForTileKey(tileKey) {
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var _a = tileKey
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.substring(tileKey.lastIndexOf('/') + 1, tileKey.length)
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.split(',')
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.map(Number), z = _a[0], x = _a[1], y = _a[2];
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return getKeyZXY(z, x, y);
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}
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/**
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* Get a tile coord given a key.
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* @param {string} key The tile coord key.
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* @return {TileCoord} The tile coord.
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*/
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export function fromKey(key) {
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return key.split('/').map(Number);
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}
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/**
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* @param {TileCoord} tileCoord Tile coord.
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* @return {number} Hash.
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*/
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export function hash(tileCoord) {
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return (tileCoord[1] << tileCoord[0]) + tileCoord[2];
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}
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/**
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* @param {TileCoord} tileCoord Tile coordinate.
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* @param {!import("./tilegrid/TileGrid.js").default} tileGrid Tile grid.
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* @return {boolean} Tile coordinate is within extent and zoom level range.
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*/
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export function withinExtentAndZ(tileCoord, tileGrid) {
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var z = tileCoord[0];
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var x = tileCoord[1];
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var y = tileCoord[2];
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if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {
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return false;
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}
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var tileRange = tileGrid.getFullTileRange(z);
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if (!tileRange) {
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return true;
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}
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else {
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return tileRange.containsXY(x, y);
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}
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}
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//# sourceMappingURL=tilecoord.js.map
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