openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
153 lines (125 loc) • 3.32 kB
JavaScript
goog.provide('ol.TileRange');
/**
* A representation of a contiguous block of tiles. A tile range is specified
* by its min/max tile coordinates and is inclusive of coordinates.
*
* @constructor
* @param {number} minX Minimum X.
* @param {number} maxX Maximum X.
* @param {number} minY Minimum Y.
* @param {number} maxY Maximum Y.
* @struct
*/
ol.TileRange = function(minX, maxX, minY, maxY) {
/**
* @type {number}
*/
this.minX = minX;
/**
* @type {number}
*/
this.maxX = maxX;
/**
* @type {number}
*/
this.minY = minY;
/**
* @type {number}
*/
this.maxY = maxY;
};
/**
* @param {number} minX Minimum X.
* @param {number} maxX Maximum X.
* @param {number} minY Minimum Y.
* @param {number} maxY Maximum Y.
* @param {ol.TileRange|undefined} tileRange TileRange.
* @return {ol.TileRange} Tile range.
*/
ol.TileRange.createOrUpdate = function(minX, maxX, minY, maxY, tileRange) {
if (tileRange !== undefined) {
tileRange.minX = minX;
tileRange.maxX = maxX;
tileRange.minY = minY;
tileRange.maxY = maxY;
return tileRange;
} else {
return new ol.TileRange(minX, maxX, minY, maxY);
}
};
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @return {boolean} Contains tile coordinate.
*/
ol.TileRange.prototype.contains = function(tileCoord) {
return this.containsXY(tileCoord[1], tileCoord[2]);
};
/**
* @param {ol.TileRange} tileRange Tile range.
* @return {boolean} Contains.
*/
ol.TileRange.prototype.containsTileRange = function(tileRange) {
return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&
this.minY <= tileRange.minY && tileRange.maxY <= this.maxY;
};
/**
* @param {number} x Tile coordinate x.
* @param {number} y Tile coordinate y.
* @return {boolean} Contains coordinate.
*/
ol.TileRange.prototype.containsXY = function(x, y) {
return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;
};
/**
* @param {ol.TileRange} tileRange Tile range.
* @return {boolean} Equals.
*/
ol.TileRange.prototype.equals = function(tileRange) {
return this.minX == tileRange.minX && this.minY == tileRange.minY &&
this.maxX == tileRange.maxX && this.maxY == tileRange.maxY;
};
/**
* @param {ol.TileRange} tileRange Tile range.
*/
ol.TileRange.prototype.extend = function(tileRange) {
if (tileRange.minX < this.minX) {
this.minX = tileRange.minX;
}
if (tileRange.maxX > this.maxX) {
this.maxX = tileRange.maxX;
}
if (tileRange.minY < this.minY) {
this.minY = tileRange.minY;
}
if (tileRange.maxY > this.maxY) {
this.maxY = tileRange.maxY;
}
};
/**
* @return {number} Height.
*/
ol.TileRange.prototype.getHeight = function() {
return this.maxY - this.minY + 1;
};
/**
* @return {ol.Size} Size.
*/
ol.TileRange.prototype.getSize = function() {
return [this.getWidth(), this.getHeight()];
};
/**
* @return {number} Width.
*/
ol.TileRange.prototype.getWidth = function() {
return this.maxX - this.minX + 1;
};
/**
* @param {ol.TileRange} tileRange Tile range.
* @return {boolean} Intersects.
*/
ol.TileRange.prototype.intersects = function(tileRange) {
return this.minX <= tileRange.maxX &&
this.maxX >= tileRange.minX &&
this.minY <= tileRange.maxY &&
this.maxY >= tileRange.minY;
};