179 lines
4.1 KiB
JavaScript
179 lines
4.1 KiB
JavaScript
goog.provide('ol.TileRange');
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goog.require('goog.asserts');
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goog.require('ol.Size');
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goog.require('ol.TileCoord');
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/**
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* A representation of a contiguous block of tiles. A tile range is specified
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* by its min/max tile coordinates and is inclusive of coordinates.
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*
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* @constructor
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* @param {number} minX Minimum X.
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* @param {number} maxX Maximum X.
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* @param {number} minY Minimum Y.
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* @param {number} maxY Maximum Y.
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* @struct
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*/
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ol.TileRange = function(minX, maxX, minY, maxY) {
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/**
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* @type {number}
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*/
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this.minX = minX;
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/**
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* @type {number}
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*/
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this.maxX = maxX;
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/**
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* @type {number}
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*/
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this.minY = minY;
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/**
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* @type {number}
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*/
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this.maxY = maxY;
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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.TileRange} Bounding tile box.
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*/
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ol.TileRange.boundingTileRange = function(var_args) {
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var tileCoord0 = /** @type {ol.TileCoord} */ (arguments[0]);
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var tileRange = new ol.TileRange(tileCoord0.x, tileCoord0.x,
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tileCoord0.y, tileCoord0.y);
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var i, ii, tileCoord;
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for (i = 1, ii = arguments.length; i < ii; ++i) {
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tileCoord = /** @type {ol.TileCoord} */ (arguments[i]);
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goog.asserts.assert(tileCoord.z == tileCoord0.z);
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tileRange.minX = Math.min(tileRange.minX, tileCoord.x);
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tileRange.maxX = Math.max(tileRange.maxX, tileCoord.x);
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tileRange.minY = Math.min(tileRange.minY, tileCoord.y);
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tileRange.maxY = Math.max(tileRange.maxY, tileCoord.y);
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}
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return tileRange;
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};
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/**
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* @param {number} minX Minimum X.
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* @param {number} maxX Maximum X.
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* @param {number} minY Minimum Y.
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* @param {number} maxY Maximum Y.
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* @param {ol.TileRange|undefined} tileRange TileRange.
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* @return {ol.TileRange} Tile range.
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*/
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ol.TileRange.createOrUpdate = function(minX, maxX, minY, maxY, tileRange) {
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if (goog.isDef(tileRange)) {
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tileRange.minX = minX;
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tileRange.maxX = maxX;
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tileRange.minY = minY;
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tileRange.maxY = maxY;
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return tileRange;
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} else {
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return new ol.TileRange(minX, maxX, minY, maxY);
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}
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};
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/**
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* @param {ol.TileCoord} tileCoord Tile coordinate.
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* @return {boolean} Contains tile coordinate.
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*/
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ol.TileRange.prototype.contains = function(tileCoord) {
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return this.containsXY(tileCoord.x, tileCoord.y);
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};
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/**
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* @param {ol.TileRange} tileRange Tile range.
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* @return {boolean} Contains.
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*/
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ol.TileRange.prototype.containsTileRange = function(tileRange) {
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return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&
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this.minY <= tileRange.minY && tileRange.maxY <= this.maxY;
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};
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/**
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* @param {number} x Tile coordinate x.
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* @param {number} y Tile coordinate y.
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* @return {boolean} Contains coordinate.
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*/
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ol.TileRange.prototype.containsXY = function(x, y) {
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return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;
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};
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/**
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* @param {ol.TileRange} tileRange Tile range.
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* @return {boolean} Equals.
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*/
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ol.TileRange.prototype.equals = function(tileRange) {
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return this.minX == tileRange.minX && this.minY == tileRange.minY &&
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this.maxX == tileRange.maxX && this.maxY == tileRange.maxY;
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};
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/**
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* @param {ol.TileRange} tileRange Tile range.
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*/
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ol.TileRange.prototype.extend = function(tileRange) {
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if (tileRange.minX < this.minX) {
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this.minX = tileRange.minX;
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}
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if (tileRange.maxX > this.maxX) {
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this.maxX = tileRange.maxX;
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}
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if (tileRange.minY < this.minY) {
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this.minY = tileRange.minY;
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}
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if (tileRange.maxY > this.maxY) {
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this.maxY = tileRange.maxY;
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}
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};
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/**
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* @return {number} Height.
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*/
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ol.TileRange.prototype.getHeight = function() {
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return this.maxY - this.minY + 1;
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};
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/**
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* @return {ol.Size} Size.
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*/
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ol.TileRange.prototype.getSize = function() {
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return [this.getWidth(), this.getHeight()];
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};
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/**
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* @return {number} Width.
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*/
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ol.TileRange.prototype.getWidth = function() {
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return this.maxX - this.minX + 1;
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};
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/**
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* @param {ol.TileRange} tileRange Tile range.
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* @return {boolean} Intersects.
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*/
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ol.TileRange.prototype.intersects = function(tileRange) {
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return this.minX <= tileRange.maxX &&
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this.maxX >= tileRange.minX &&
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this.minY <= tileRange.maxY &&
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this.maxY >= tileRange.minY;
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};
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