71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
goog.provide('ol.TileBounds');
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goog.require('goog.asserts');
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goog.require('goog.math.Box');
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goog.require('ol.TileCoord');
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/**
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* @constructor
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* @extends {goog.math.Box}
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* @param {number} top Top.
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* @param {number} right Right.
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* @param {number} bottom Bottom.
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* @param {number} left Left.
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*/
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ol.TileBounds = function(top, right, bottom, left) {
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goog.asserts.assert(top <= bottom);
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goog.asserts.assert(left <= right);
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goog.base(this, top, right, bottom, left);
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};
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goog.inherits(ol.TileBounds, goog.math.Box);
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/**
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* @param {number} z Z.
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* @param {function(this: T, ol.TileCoord): boolean} f Callback.
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* @param {T=} opt_obj The object to be used for the value of 'this' within f.
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* @template T
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*/
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ol.TileBounds.prototype.forEachTileCoord = function(z, f, opt_obj) {
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var tileCoord = new ol.TileCoord(z, 0, 0);
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var x, y;
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for (x = this.left; x <= this.right; ++x) {
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tileCoord.x = x;
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for (y = this.top; y <= this.bottom; ++y) {
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tileCoord.y = y;
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if (f.call(opt_obj, tileCoord)) {
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return;
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}
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goog.asserts.assert(tileCoord.z == z);
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goog.asserts.assert(tileCoord.x == x);
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goog.asserts.assert(tileCoord.y == y);
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}
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}
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};
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/**
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* @param {...ol.TileCoord} var_args Tile coordinates.
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* @return {!ol.TileBounds} Bounding tile box.
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*/
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ol.TileBounds.boundingTileBounds = function(var_args) {
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var tileCoord0 = arguments[0];
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var tileBounds = new ol.TileBounds(tileCoord0.y, tileCoord0.x,
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tileCoord0.y, tileCoord0.x);
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var i;
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for (i = 1; i < arguments.length; ++i) {
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var tileCoord = arguments[i];
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goog.asserts.assert(tileCoord.z == tileCoord0.z);
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tileBounds.top = Math.min(tileBounds.top, tileCoord.y);
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tileBounds.right = Math.max(tileBounds.right, tileCoord.x);
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tileBounds.bottom = Math.max(tileBounds.bottom, tileCoord.y);
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tileBounds.left = Math.min(tileBounds.left, tileCoord.x);
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}
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return tileBounds;
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};
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